jdk/src/java.base/share/classes/java/lang/ClassLoader.java
author chegar
Fri, 15 Apr 2016 16:19:15 +0100
changeset 37363 329dba26ffd2
parent 36972 27147cde3256
child 37521 b6e0f285c998
permissions -rw-r--r--
8137058: Clear out all non-Critical APIs from sun.reflect Reviewed-by: alanb, jfranck, mchung
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/*
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 * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package java.lang;
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import java.io.InputStream;
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import java.io.IOException;
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import java.io.File;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Field;
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import java.lang.reflect.Module;
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import java.net.URL;
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import java.security.AccessController;
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import java.security.AccessControlContext;
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import java.security.CodeSource;
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import java.security.PrivilegedAction;
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import java.security.ProtectionDomain;
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import java.security.cert.Certificate;
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import java.util.Collections;
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Hashtable;
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import java.util.Map;
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import java.util.Objects;
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import java.util.Set;
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import java.util.Stack;
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import java.util.NoSuchElementException;
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import java.util.Vector;
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import java.util.WeakHashMap;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.stream.Stream;
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import jdk.internal.perf.PerfCounter;
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import jdk.internal.module.ServicesCatalog;
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import jdk.internal.loader.BootLoader;
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import jdk.internal.loader.ClassLoaders;
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import jdk.internal.misc.SharedSecrets;
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import jdk.internal.misc.Unsafe;
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import jdk.internal.misc.VM;
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import jdk.internal.reflect.CallerSensitive;
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import jdk.internal.reflect.Reflection;
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import sun.reflect.misc.ReflectUtil;
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import sun.security.util.SecurityConstants;
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/**
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 * A class loader is an object that is responsible for loading classes. The
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 * class <tt>ClassLoader</tt> is an abstract class.  Given the <a
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 * href="#name">binary name</a> of a class, a class loader should attempt to
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 * locate or generate data that constitutes a definition for the class.  A
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 * typical strategy is to transform the name into a file name and then read a
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 * "class file" of that name from a file system.
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 *
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 * <p> Every {@link Class <tt>Class</tt>} object contains a {@link
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 * Class#getClassLoader() reference} to the <tt>ClassLoader</tt> that defined
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 * it.
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 *
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 * <p> <tt>Class</tt> objects for array classes are not created by class
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 * loaders, but are created automatically as required by the Java runtime.
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 * The class loader for an array class, as returned by {@link
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 * Class#getClassLoader()} is the same as the class loader for its element
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 * type; if the element type is a primitive type, then the array class has no
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 * class loader.
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 *
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 * <p> Applications implement subclasses of <tt>ClassLoader</tt> in order to
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 * extend the manner in which the Java virtual machine dynamically loads
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 * classes.
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 *
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 * <p> Class loaders may typically be used by security managers to indicate
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 * security domains.
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 *
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 * <p> The <tt>ClassLoader</tt> class uses a delegation model to search for
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 * classes and resources.  Each instance of <tt>ClassLoader</tt> has an
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 * associated parent class loader.  When requested to find a class or
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 * resource, a <tt>ClassLoader</tt> instance will delegate the search for the
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 * class or resource to its parent class loader before attempting to find the
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 * class or resource itself.
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 *
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 * <p> Class loaders that support concurrent loading of classes are known as
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 * <em>parallel capable</em> class loaders and are required to register
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 * themselves at their class initialization time by invoking the
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 * {@link
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 * #registerAsParallelCapable <tt>ClassLoader.registerAsParallelCapable</tt>}
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 * method. Note that the <tt>ClassLoader</tt> class is registered as parallel
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 * capable by default. However, its subclasses still need to register themselves
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 * if they are parallel capable.
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 * In environments in which the delegation model is not strictly
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 * hierarchical, class loaders need to be parallel capable, otherwise class
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 * loading can lead to deadlocks because the loader lock is held for the
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 * duration of the class loading process (see {@link #loadClass
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 * <tt>loadClass</tt>} methods).
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 *
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 * <h3> <a name="builtinLoaders">Run-time Built-in Class Loaders</a></h3>
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 *
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 * The Java run-time has the following built-in class loaders:
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 *
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 * <ul>
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 * <li>Bootstrap class loader.
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 *     It is the virtual machine's built-in class loader, typically represented
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 *     as {@code null}, and does not have a parent.</li>
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 * <li>{@linkplain #getPlatformClassLoader() Platform class loader}.
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 *     All <em>platform classes</em> are visible to the platform class loader
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 *     that can be used as the parent of a {@code ClassLoader} instance.
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 *     Platform classes include Java SE platform APIs, their implementation
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 *     classes and JDK-specific run-time classes that are defined by the
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 *     platform class loader or its ancestors.</li>
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 * <li>{@linkplain #getSystemClassLoader() System class loader}.
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 *     It is also known as <em>application class
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 *     loader</em> and is distinct from the platform class loader.
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 *     The system class loader is typically used to define classes on the
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 *     application class path, module path, and JDK-specific tools.
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 *     The platform class loader is a parent or an ancestor of the system class
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 *     loader that all platform classes are visible to it.</li>
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 * </ul>
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 *
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 * <p> Normally, the Java virtual machine loads classes from the local file
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 * system in a platform-dependent manner.
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 * However, some classes may not originate from a file; they may originate
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 * from other sources, such as the network, or they could be constructed by an
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 * application.  The method {@link #defineClass(String, byte[], int, int)
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 * <tt>defineClass</tt>} converts an array of bytes into an instance of class
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 * <tt>Class</tt>. Instances of this newly defined class can be created using
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 * {@link Class#newInstance <tt>Class.newInstance</tt>}.
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 *
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 * <p> The methods and constructors of objects created by a class loader may
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 * reference other classes.  To determine the class(es) referred to, the Java
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 * virtual machine invokes the {@link #loadClass <tt>loadClass</tt>} method of
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 * the class loader that originally created the class.
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 *
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 * <p> For example, an application could create a network class loader to
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 * download class files from a server.  Sample code might look like:
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 *
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 * <blockquote><pre>
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 *   ClassLoader loader&nbsp;= new NetworkClassLoader(host,&nbsp;port);
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 *   Object main&nbsp;= loader.loadClass("Main", true).newInstance();
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 *       &nbsp;.&nbsp;.&nbsp;.
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 * </pre></blockquote>
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 *
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 * <p> The network class loader subclass must define the methods {@link
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 * #findClass <tt>findClass</tt>} and <tt>loadClassData</tt> to load a class
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 * from the network.  Once it has downloaded the bytes that make up the class,
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 * it should use the method {@link #defineClass <tt>defineClass</tt>} to
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 * create a class instance.  A sample implementation is:
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 *
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 * <blockquote><pre>
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 *     class NetworkClassLoader extends ClassLoader {
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 *         String host;
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 *         int port;
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 *
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 *         public Class findClass(String name) {
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 *             byte[] b = loadClassData(name);
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 *             return defineClass(name, b, 0, b.length);
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 *         }
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 *
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 *         private byte[] loadClassData(String name) {
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 *             // load the class data from the connection
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 *             &nbsp;.&nbsp;.&nbsp;.
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 *         }
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 *     }
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 * </pre></blockquote>
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 *
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 * <h3> <a name="name">Binary names</a> </h3>
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 *
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 * <p> Any class name provided as a {@code String} parameter to methods in
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 * {@code ClassLoader} must be a binary name as defined by
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 * <cite>The Java&trade; Language Specification</cite>.
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 *
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 * <p> Examples of valid class names include:
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 * <blockquote><pre>
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 *   "java.lang.String"
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 *   "javax.swing.JSpinner$DefaultEditor"
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 *   "java.security.KeyStore$Builder$FileBuilder$1"
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 *   "java.net.URLClassLoader$3$1"
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 * </pre></blockquote>
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 *
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 * <p> Any package name provided as a {@code String} parameter to methods in
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 * {@code ClassLoader} must be either the empty string (denoting an unnamed package)
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 * or a fully qualified name as defined by
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 * <cite>The Java&trade; Language Specification</cite>.
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 *
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 * @jls 6.7  Fully Qualified Names
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 * @jls 13.1 The Form of a Binary
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 * @see      #resolveClass(Class)
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 * @since 1.0
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 */
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public abstract class ClassLoader {
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    private static native void registerNatives();
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    static {
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        registerNatives();
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    }
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    // The parent class loader for delegation
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    // Note: VM hardcoded the offset of this field, thus all new fields
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    // must be added *after* it.
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    private final ClassLoader parent;
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    // the unnamed module for this ClassLoader
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    private final Module unnamedModule;
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    /**
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     * Encapsulates the set of parallel capable loader types.
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     */
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    private static class ParallelLoaders {
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        private ParallelLoaders() {}
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        // the set of parallel capable loader types
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        private static final Set<Class<? extends ClassLoader>> loaderTypes =
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            Collections.newSetFromMap(new WeakHashMap<>());
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        static {
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            synchronized (loaderTypes) { loaderTypes.add(ClassLoader.class); }
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        }
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        /**
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         * Registers the given class loader type as parallel capable.
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         * Returns {@code true} is successfully registered; {@code false} if
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         * loader's super class is not registered.
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         */
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        static boolean register(Class<? extends ClassLoader> c) {
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            synchronized (loaderTypes) {
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                if (loaderTypes.contains(c.getSuperclass())) {
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                    // register the class loader as parallel capable
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                    // if and only if all of its super classes are.
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                    // Note: given current classloading sequence, if
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                    // the immediate super class is parallel capable,
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                    // all the super classes higher up must be too.
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                    loaderTypes.add(c);
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                    return true;
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                } else {
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                    return false;
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                }
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            }
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        }
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        /**
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         * Returns {@code true} if the given class loader type is
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         * registered as parallel capable.
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         */
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        static boolean isRegistered(Class<? extends ClassLoader> c) {
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            synchronized (loaderTypes) {
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                return loaderTypes.contains(c);
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            }
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        }
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    }
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    // Maps class name to the corresponding lock object when the current
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    // class loader is parallel capable.
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    // Note: VM also uses this field to decide if the current class loader
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    // is parallel capable and the appropriate lock object for class loading.
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    private final ConcurrentHashMap<String, Object> parallelLockMap;
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    // Maps packages to certs
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    private final Map <String, Certificate[]> package2certs;
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    // Shared among all packages with unsigned classes
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    private static final Certificate[] nocerts = new Certificate[0];
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    // The classes loaded by this class loader. The only purpose of this table
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    // is to keep the classes from being GC'ed until the loader is GC'ed.
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    private final Vector<Class<?>> classes = new Vector<>();
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    // The "default" domain. Set as the default ProtectionDomain on newly
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    // created classes.
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    private final ProtectionDomain defaultDomain =
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        new ProtectionDomain(new CodeSource(null, (Certificate[]) null),
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                             null, this, null);
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    // The initiating protection domains for all classes loaded by this loader
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    private final Set<ProtectionDomain> domains;
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    // Invoked by the VM to record every loaded class with this loader.
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    void addClass(Class<?> c) {
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        classes.addElement(c);
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    }
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    // The packages defined in this class loader.  Each package name is
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    // mapped to its corresponding NamedPackage object.
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    //
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    // The value is a Package object if ClassLoader::definePackage,
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    // Class::getPackage, ClassLoader::getDefinePackage(s) or
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    // Package::getPackage(s) method is called to define it.
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    // Otherwise, the value is a NamedPackage object.
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    private final ConcurrentHashMap<String, NamedPackage> packages
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            = new ConcurrentHashMap<>();
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    /*
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     * Returns a named package for the given module.
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     */
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    private NamedPackage getNamedPackage(String pn, Module m) {
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        NamedPackage p = packages.get(pn);
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        if (p == null) {
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            p = new NamedPackage(pn, m);
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            NamedPackage value = packages.putIfAbsent(pn, p);
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            if (value != null) {
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                // Package object already be defined for the named package
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                p = value;
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                // if definePackage is called by this class loader to define
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                // a package in a named module, this will return Package
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                // object of the same name.  Package object may contain
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                // unexpected information but it does not impact the runtime.
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                // this assertion may be helpful for troubleshooting
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                assert value.module() == m;
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            }
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        }
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        return p;
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    }
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    private static Void checkCreateClassLoader() {
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        SecurityManager security = System.getSecurityManager();
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        if (security != null) {
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            security.checkCreateClassLoader();
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        }
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        return null;
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    }
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    private ClassLoader(Void unused, ClassLoader parent) {
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        this.parent = parent;
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        this.unnamedModule
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            = SharedSecrets.getJavaLangReflectModuleAccess()
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                           .defineUnnamedModule(this);
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        if (ParallelLoaders.isRegistered(this.getClass())) {
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            parallelLockMap = new ConcurrentHashMap<>();
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            package2certs = new ConcurrentHashMap<>();
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            domains = Collections.synchronizedSet(new HashSet<>());
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            assertionLock = new Object();
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        } else {
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            // no finer-grained lock; lock on the classloader instance
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            parallelLockMap = null;
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            package2certs = new Hashtable<>();
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            domains = new HashSet<>();
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            assertionLock = this;
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        }
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    }
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    /**
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     * Creates a new class loader using the specified parent class loader for
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     * delegation.
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     *
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     * <p> If there is a security manager, its {@link
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     * SecurityManager#checkCreateClassLoader()
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     * <tt>checkCreateClassLoader</tt>} method is invoked.  This may result in
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     * a security exception.  </p>
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     *
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     * @param  parent
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     *         The parent class loader
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     *
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     * @throws  SecurityException
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     *          If a security manager exists and its
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     *          <tt>checkCreateClassLoader</tt> method doesn't allow creation
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     *          of a new class loader.
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     *
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     * @since  1.2
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     */
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    protected ClassLoader(ClassLoader parent) {
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        this(checkCreateClassLoader(), parent);
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    }
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    /**
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     * Creates a new class loader using the <tt>ClassLoader</tt> returned by
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     * the method {@link #getSystemClassLoader()
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     * <tt>getSystemClassLoader()</tt>} as the parent class loader.
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     *
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     * <p> If there is a security manager, its {@link
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     * SecurityManager#checkCreateClassLoader()
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     * <tt>checkCreateClassLoader</tt>} method is invoked.  This may result in
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     * a security exception.  </p>
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     *
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     * @throws  SecurityException
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     *          If a security manager exists and its
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   393
     *          <tt>checkCreateClassLoader</tt> method doesn't allow creation
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     *          of a new class loader.
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   395
     */
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   396
    protected ClassLoader() {
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   397
        this(checkCreateClassLoader(), getSystemClassLoader());
2
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   398
    }
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   399
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   400
    // -- Class --
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   401
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   402
    /**
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   403
     * Loads the class with the specified <a href="#name">binary name</a>.
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     * This method searches for classes in the same manner as the {@link
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   405
     * #loadClass(String, boolean)} method.  It is invoked by the Java virtual
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   406
     * machine to resolve class references.  Invoking this method is equivalent
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   407
     * to invoking {@link #loadClass(String, boolean) <tt>loadClass(name,
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
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   408
     * false)</tt>}.
2
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     *
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   410
     * @param  name
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   411
     *         The <a href="#name">binary name</a> of the class
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   412
     *
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   413
     * @return  The resulting <tt>Class</tt> object
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   414
     *
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   415
     * @throws  ClassNotFoundException
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     *          If the class was not found
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   417
     */
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   418
    public Class<?> loadClass(String name) throws ClassNotFoundException {
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   419
        return loadClass(name, false);
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   420
    }
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   421
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   422
    /**
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   423
     * Loads the class with the specified <a href="#name">binary name</a>.  The
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   424
     * default implementation of this method searches for classes in the
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   425
     * following order:
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   426
     *
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darcy
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   427
     * <ol>
2
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     *
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     *   <li><p> Invoke {@link #findLoadedClass(String)} to check if the class
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   430
     *   has already been loaded.  </p></li>
90ce3da70b43 Initial load
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   431
     *
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   432
     *   <li><p> Invoke the {@link #loadClass(String) <tt>loadClass</tt>} method
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   433
     *   on the parent class loader.  If the parent is <tt>null</tt> the class
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   434
     *   loader built-in to the virtual machine is used, instead.  </p></li>
90ce3da70b43 Initial load
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   435
     *
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   436
     *   <li><p> Invoke the {@link #findClass(String)} method to find the
90ce3da70b43 Initial load
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   437
     *   class.  </p></li>
90ce3da70b43 Initial load
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   438
     *
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   439
     * </ol>
90ce3da70b43 Initial load
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   440
     *
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   441
     * <p> If the class was found using the above steps, and the
90ce3da70b43 Initial load
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   442
     * <tt>resolve</tt> flag is true, this method will then invoke the {@link
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   443
     * #resolveClass(Class)} method on the resulting <tt>Class</tt> object.
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   444
     *
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   445
     * <p> Subclasses of <tt>ClassLoader</tt> are encouraged to override {@link
90ce3da70b43 Initial load
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   446
     * #findClass(String)}, rather than this method.  </p>
90ce3da70b43 Initial load
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   447
     *
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   448
     * <p> Unless overridden, this method synchronizes on the result of
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
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   449
     * {@link #getClassLoadingLock <tt>getClassLoadingLock</tt>} method
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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   450
     * during the entire class loading process.
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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   451
     *
2
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   452
     * @param  name
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diff changeset
   453
     *         The <a href="#name">binary name</a> of the class
90ce3da70b43 Initial load
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   454
     *
90ce3da70b43 Initial load
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   455
     * @param  resolve
90ce3da70b43 Initial load
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   456
     *         If <tt>true</tt> then resolve the class
90ce3da70b43 Initial load
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   457
     *
90ce3da70b43 Initial load
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   458
     * @return  The resulting <tt>Class</tt> object
90ce3da70b43 Initial load
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   459
     *
90ce3da70b43 Initial load
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   460
     * @throws  ClassNotFoundException
90ce3da70b43 Initial load
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   461
     *          If the class could not be found
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   462
     */
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   463
    protected Class<?> loadClass(String name, boolean resolve)
2
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   464
        throws ClassNotFoundException
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   465
    {
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   466
        synchronized (getClassLoadingLock(name)) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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   467
            // First, check if the class has already been loaded
11117
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alanb
parents: 9266
diff changeset
   468
            Class<?> c = findLoadedClass(name);
2448
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valeriep
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   469
            if (c == null) {
3849
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diff changeset
   470
                long t0 = System.nanoTime();
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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   471
                try {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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diff changeset
   472
                    if (parent != null) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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diff changeset
   473
                        c = parent.loadClass(name, false);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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diff changeset
   474
                    } else {
3833
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
   475
                        c = findBootstrapClassOrNull(name);
2448
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valeriep
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diff changeset
   476
                    }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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diff changeset
   477
                } catch (ClassNotFoundException e) {
3833
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
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   478
                    // ClassNotFoundException thrown if class not found
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
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diff changeset
   479
                    // from the non-null parent class loader
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
   480
                }
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
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diff changeset
   481
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
   482
                if (c == null) {
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   483
                    // If still not found, then invoke findClass in order
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   484
                    // to find the class.
3849
34469964aa98 6878481: Add performance counters in the JDK
mchung
parents: 3833
diff changeset
   485
                    long t1 = System.nanoTime();
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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diff changeset
   486
                    c = findClass(name);
3849
34469964aa98 6878481: Add performance counters in the JDK
mchung
parents: 3833
diff changeset
   487
34469964aa98 6878481: Add performance counters in the JDK
mchung
parents: 3833
diff changeset
   488
                    // this is the defining class loader; record the stats
34953
67245e3259bf 8146736: Move sun.misc performance counters to jdk.internal.perf
chegar
parents: 34825
diff changeset
   489
                    PerfCounter.getParentDelegationTime().addTime(t1 - t0);
67245e3259bf 8146736: Move sun.misc performance counters to jdk.internal.perf
chegar
parents: 34825
diff changeset
   490
                    PerfCounter.getFindClassTime().addElapsedTimeFrom(t1);
67245e3259bf 8146736: Move sun.misc performance counters to jdk.internal.perf
chegar
parents: 34825
diff changeset
   491
                    PerfCounter.getFindClasses().increment();
2
90ce3da70b43 Initial load
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diff changeset
   492
                }
2448
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valeriep
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diff changeset
   493
            }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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diff changeset
   494
            if (resolve) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   495
                resolveClass(c);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   496
            }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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diff changeset
   497
            return c;
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
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diff changeset
   498
        }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   499
    }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   500
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   501
    /**
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   502
     * Loads the class with the specified <a href="#name">binary name</a>
9d0388c6b336 8142968: Module System implementation
alanb
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diff changeset
   503
     * in a module defined to this class loader.  This method returns {@code null}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   504
     * if the class could not be found.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   505
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   506
     * @apiNote This method does not delegate to the parent class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   507
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   508
     * @implSpec The default implementation of this method searches for classes
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   509
     * in the following order:
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   510
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   511
     * <ol>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   512
     *   <li>Invoke {@link #findLoadedClass(String)} to check if the class
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   513
     *   has already been loaded.</li>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   514
     *   <li>Invoke the {@link #findClass(String, String)} method to find the
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   515
     *   class in the given module.</li>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   516
     * </ol>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   517
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   518
     * @param  module
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   519
     *         The module
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   520
     * @param  name
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   521
     *         The <a href="#name">binary name</a> of the class
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   522
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   523
     * @return The resulting {@code Class} object in a module defined by
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   524
     *         this class loader, or {@code null} if the class could not be found.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   525
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   526
    final Class<?> loadLocalClass(Module module, String name) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   527
        synchronized (getClassLoadingLock(name)) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   528
            // First, check if the class has already been loaded
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   529
            Class<?> c = findLoadedClass(name);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   530
            if (c == null) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   531
                c = findClass(module.getName(), name);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   532
            }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   533
            if (c != null && c.getModule() == module) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   534
                return c;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   535
            } else {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   536
                return null;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   537
            }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   538
        }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   539
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   540
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   541
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   542
     * Loads the class with the specified <a href="#name">binary name</a>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   543
     * defined by this class loader.  This method returns {@code null}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   544
     * if the class could not be found.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   545
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   546
     * @apiNote This method does not delegate to the parent class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   547
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   548
     * @param  name
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   549
     *         The <a href="#name">binary name</a> of the class
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   550
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   551
     * @return The resulting {@code Class} object in a module defined by
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   552
     *         this class loader, or {@code null} if the class could not be found.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   553
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   554
    final Class<?> loadLocalClass(String name) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   555
        synchronized (getClassLoadingLock(name)) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   556
            // First, check if the class has already been loaded
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   557
            Class<?> c = findLoadedClass(name);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   558
            if (c == null) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   559
                try {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   560
                    return findClass(name);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   561
                } catch (ClassNotFoundException e) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   562
                    // ignore
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   563
                }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   564
            }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   565
            return c;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   566
        }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   567
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   568
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   569
    /**
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   570
     * Returns the lock object for class loading operations.
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   571
     * For backward compatibility, the default implementation of this method
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   572
     * behaves as follows. If this ClassLoader object is registered as
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   573
     * parallel capable, the method returns a dedicated object associated
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   574
     * with the specified class name. Otherwise, the method returns this
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
   575
     * ClassLoader object.
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   576
     *
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   577
     * @param  className
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   578
     *         The name of the to-be-loaded class
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   579
     *
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   580
     * @return the lock for class loading operations
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   581
     *
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   582
     * @throws NullPointerException
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   583
     *         If registered as parallel capable and <tt>className</tt> is null
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   584
     *
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   585
     * @see #loadClass(String, boolean)
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   586
     *
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   587
     * @since  1.7
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   588
     */
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   589
    protected Object getClassLoadingLock(String className) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   590
        Object lock = this;
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   591
        if (parallelLockMap != null) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   592
            Object newLock = new Object();
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   593
            lock = parallelLockMap.putIfAbsent(className, newLock);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   594
            if (lock == null) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   595
                lock = newLock;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   596
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   597
        }
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   598
        return lock;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   599
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   600
90ce3da70b43 Initial load
duke
parents:
diff changeset
   601
    // This method is invoked by the virtual machine to load a class.
11117
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
   602
    private Class<?> loadClassInternal(String name)
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   603
        throws ClassNotFoundException
90ce3da70b43 Initial load
duke
parents:
diff changeset
   604
    {
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   605
        // For backward compatibility, explicitly lock on 'this' when
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   606
        // the current class loader is not parallel capable.
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   607
        if (parallelLockMap == null) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   608
            synchronized (this) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   609
                 return loadClass(name);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   610
            }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   611
        } else {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   612
            return loadClass(name);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   613
        }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   614
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   615
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   616
    // Invoked by the VM after loading class with this loader.
11117
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
   617
    private void checkPackageAccess(Class<?> cls, ProtectionDomain pd) {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   618
        final SecurityManager sm = System.getSecurityManager();
90ce3da70b43 Initial load
duke
parents:
diff changeset
   619
        if (sm != null) {
20817
a842c616ae88 8017291: Cast Proxies Aside
mchung
parents: 18156
diff changeset
   620
            if (ReflectUtil.isNonPublicProxyClass(cls)) {
21330
7b073d91ba9e 8027062: Fix lint and doclint issues in java.lang.{ClassLoader, ClassValue, SecurityManager}
darcy
parents: 20854
diff changeset
   621
                for (Class<?> intf: cls.getInterfaces()) {
20817
a842c616ae88 8017291: Cast Proxies Aside
mchung
parents: 18156
diff changeset
   622
                    checkPackageAccess(intf, pd);
a842c616ae88 8017291: Cast Proxies Aside
mchung
parents: 18156
diff changeset
   623
                }
a842c616ae88 8017291: Cast Proxies Aside
mchung
parents: 18156
diff changeset
   624
                return;
a842c616ae88 8017291: Cast Proxies Aside
mchung
parents: 18156
diff changeset
   625
            }
a842c616ae88 8017291: Cast Proxies Aside
mchung
parents: 18156
diff changeset
   626
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   627
            final String name = cls.getName();
90ce3da70b43 Initial load
duke
parents:
diff changeset
   628
            final int i = name.lastIndexOf('.');
90ce3da70b43 Initial load
duke
parents:
diff changeset
   629
            if (i != -1) {
29986
97167d851fc4 8078467: Update core libraries to use diamond with anonymous classes
darcy
parents: 28544
diff changeset
   630
                AccessController.doPrivileged(new PrivilegedAction<>() {
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
   631
                    public Void run() {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   632
                        sm.checkPackageAccess(name.substring(0, i));
90ce3da70b43 Initial load
duke
parents:
diff changeset
   633
                        return null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
   634
                    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   635
                }, new AccessControlContext(new ProtectionDomain[] {pd}));
90ce3da70b43 Initial load
duke
parents:
diff changeset
   636
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   637
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   638
        domains.add(pd);
90ce3da70b43 Initial load
duke
parents:
diff changeset
   639
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   640
90ce3da70b43 Initial load
duke
parents:
diff changeset
   641
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
   642
     * Finds the class with the specified <a href="#name">binary name</a>.
90ce3da70b43 Initial load
duke
parents:
diff changeset
   643
     * This method should be overridden by class loader implementations that
90ce3da70b43 Initial load
duke
parents:
diff changeset
   644
     * follow the delegation model for loading classes, and will be invoked by
90ce3da70b43 Initial load
duke
parents:
diff changeset
   645
     * the {@link #loadClass <tt>loadClass</tt>} method after checking the
90ce3da70b43 Initial load
duke
parents:
diff changeset
   646
     * parent class loader for the requested class.  The default implementation
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
   647
     * throws a <tt>ClassNotFoundException</tt>.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   648
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   649
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
   650
     *         The <a href="#name">binary name</a> of the class
90ce3da70b43 Initial load
duke
parents:
diff changeset
   651
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   652
     * @return  The resulting <tt>Class</tt> object
90ce3da70b43 Initial load
duke
parents:
diff changeset
   653
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   654
     * @throws  ClassNotFoundException
90ce3da70b43 Initial load
duke
parents:
diff changeset
   655
     *          If the class could not be found
90ce3da70b43 Initial load
duke
parents:
diff changeset
   656
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   657
     * @since  1.2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   658
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
   659
    protected Class<?> findClass(String name) throws ClassNotFoundException {
90ce3da70b43 Initial load
duke
parents:
diff changeset
   660
        throw new ClassNotFoundException(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
   661
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   662
90ce3da70b43 Initial load
duke
parents:
diff changeset
   663
    /**
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   664
     * Finds the class with the given <a href="#name">binary name</a>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   665
     * in a module defined to this class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   666
     * Class loader implementations that support the loading from modules
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   667
     * should override this method.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   668
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   669
     * @apiNote This method returns {@code null} rather than throwing
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   670
     *          {@code ClassNotFoundException} if the class could not be found
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   671
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   672
     * @implSpec The default implementation returns {@code null}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   673
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   674
     * @param  moduleName
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   675
     *         The module name
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   676
     * @param  name
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   677
     *         The <a href="#name">binary name</a> of the class
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   678
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   679
     * @return The resulting {@code Class} object, or {@code null}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   680
     *         if the class could not be found.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   681
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   682
     * @since 9
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   683
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   684
    protected Class<?> findClass(String moduleName, String name) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   685
        return null;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   686
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   687
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   688
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   689
    /**
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   690
     * Converts an array of bytes into an instance of class <tt>Class</tt>.
90ce3da70b43 Initial load
duke
parents:
diff changeset
   691
     * Before the <tt>Class</tt> can be used it must be resolved.  This method
90ce3da70b43 Initial load
duke
parents:
diff changeset
   692
     * is deprecated in favor of the version that takes a <a
90ce3da70b43 Initial load
duke
parents:
diff changeset
   693
     * href="#name">binary name</a> as its first argument, and is more secure.
90ce3da70b43 Initial load
duke
parents:
diff changeset
   694
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   695
     * @param  b
90ce3da70b43 Initial load
duke
parents:
diff changeset
   696
     *         The bytes that make up the class data.  The bytes in positions
90ce3da70b43 Initial load
duke
parents:
diff changeset
   697
     *         <tt>off</tt> through <tt>off+len-1</tt> should have the format
9266
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
   698
     *         of a valid class file as defined by
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
   699
     *         <cite>The Java&trade; Virtual Machine Specification</cite>.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   700
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   701
     * @param  off
90ce3da70b43 Initial load
duke
parents:
diff changeset
   702
     *         The start offset in <tt>b</tt> of the class data
90ce3da70b43 Initial load
duke
parents:
diff changeset
   703
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   704
     * @param  len
90ce3da70b43 Initial load
duke
parents:
diff changeset
   705
     *         The length of the class data
90ce3da70b43 Initial load
duke
parents:
diff changeset
   706
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   707
     * @return  The <tt>Class</tt> object that was created from the specified
90ce3da70b43 Initial load
duke
parents:
diff changeset
   708
     *          class data
90ce3da70b43 Initial load
duke
parents:
diff changeset
   709
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   710
     * @throws  ClassFormatError
90ce3da70b43 Initial load
duke
parents:
diff changeset
   711
     *          If the data did not contain a valid class
90ce3da70b43 Initial load
duke
parents:
diff changeset
   712
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   713
     * @throws  IndexOutOfBoundsException
90ce3da70b43 Initial load
duke
parents:
diff changeset
   714
     *          If either <tt>off</tt> or <tt>len</tt> is negative, or if
90ce3da70b43 Initial load
duke
parents:
diff changeset
   715
     *          <tt>off+len</tt> is greater than <tt>b.length</tt>.
90ce3da70b43 Initial load
duke
parents:
diff changeset
   716
     *
7029
1f8f7240a1e2 6541462: outdated specification for CCC 6339875
kamg
parents: 6890
diff changeset
   717
     * @throws  SecurityException
1f8f7240a1e2 6541462: outdated specification for CCC 6339875
kamg
parents: 6890
diff changeset
   718
     *          If an attempt is made to add this class to a package that
1f8f7240a1e2 6541462: outdated specification for CCC 6339875
kamg
parents: 6890
diff changeset
   719
     *          contains classes that were signed by a different set of
1f8f7240a1e2 6541462: outdated specification for CCC 6339875
kamg
parents: 6890
diff changeset
   720
     *          certificates than this class, or if an attempt is made
1f8f7240a1e2 6541462: outdated specification for CCC 6339875
kamg
parents: 6890
diff changeset
   721
     *          to define a class in a package with a fully-qualified name
1f8f7240a1e2 6541462: outdated specification for CCC 6339875
kamg
parents: 6890
diff changeset
   722
     *          that starts with "{@code java.}".
1f8f7240a1e2 6541462: outdated specification for CCC 6339875
kamg
parents: 6890
diff changeset
   723
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   724
     * @see  #loadClass(String, boolean)
90ce3da70b43 Initial load
duke
parents:
diff changeset
   725
     * @see  #resolveClass(Class)
90ce3da70b43 Initial load
duke
parents:
diff changeset
   726
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   727
     * @deprecated  Replaced by {@link #defineClass(String, byte[], int, int)
90ce3da70b43 Initial load
duke
parents:
diff changeset
   728
     * defineClass(String, byte[], int, int)}
90ce3da70b43 Initial load
duke
parents:
diff changeset
   729
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
   730
    @Deprecated
90ce3da70b43 Initial load
duke
parents:
diff changeset
   731
    protected final Class<?> defineClass(byte[] b, int off, int len)
90ce3da70b43 Initial load
duke
parents:
diff changeset
   732
        throws ClassFormatError
90ce3da70b43 Initial load
duke
parents:
diff changeset
   733
    {
90ce3da70b43 Initial load
duke
parents:
diff changeset
   734
        return defineClass(null, b, off, len, null);
90ce3da70b43 Initial load
duke
parents:
diff changeset
   735
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   736
90ce3da70b43 Initial load
duke
parents:
diff changeset
   737
    /**
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   738
     * Converts an array of bytes into an instance of class {@code Class}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   739
     * Before the {@code Class} can be used it must be resolved.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   740
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   741
     * <p> This method assigns a default {@link java.security.ProtectionDomain
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   742
     * ProtectionDomain} to the newly defined class.  The
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   743
     * {@code ProtectionDomain} is effectively granted the same set of
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   744
     * permissions returned when {@link
90ce3da70b43 Initial load
duke
parents:
diff changeset
   745
     * java.security.Policy#getPermissions(java.security.CodeSource)
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   746
     * Policy.getPolicy().getPermissions(new CodeSource(null, null))}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   747
     * is invoked.  The default protection domain is created on the first invocation
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   748
     * of {@link #defineClass(String, byte[], int, int) defineClass},
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   749
     * and re-used on subsequent invocations.
90ce3da70b43 Initial load
duke
parents:
diff changeset
   750
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   751
     * <p> To assign a specific {@code ProtectionDomain} to the class, use
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   752
     * the {@link #defineClass(String, byte[], int, int,
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   753
     * java.security.ProtectionDomain) defineClass} method that takes a
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   754
     * {@code ProtectionDomain} as one of its arguments.  </p>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   755
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   756
     * <p>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   757
     * This method defines a package in this class loader corresponding to the
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   758
     * package of the {@code Class} (if such a package has not already been defined
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   759
     * in this class loader). The name of the defined package is derived from
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   760
     * the <a href="#name">binary name</a> of the class specified by
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   761
     * the byte array {@code b}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   762
     * Other properties of the defined package are as specified by {@link Package}.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   763
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   764
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
   765
     *         The expected <a href="#name">binary name</a> of the class, or
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   766
     *         {@code null} if not known
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   767
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   768
     * @param  b
90ce3da70b43 Initial load
duke
parents:
diff changeset
   769
     *         The bytes that make up the class data.  The bytes in positions
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   770
     *         {@code off} through {@code off+len-1} should have the format
9266
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
   771
     *         of a valid class file as defined by
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
   772
     *         <cite>The Java&trade; Virtual Machine Specification</cite>.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   773
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   774
     * @param  off
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   775
     *         The start offset in {@code b} of the class data
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   776
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   777
     * @param  len
90ce3da70b43 Initial load
duke
parents:
diff changeset
   778
     *         The length of the class data
90ce3da70b43 Initial load
duke
parents:
diff changeset
   779
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   780
     * @return  The {@code Class} object that was created from the specified
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   781
     *          class data.
90ce3da70b43 Initial load
duke
parents:
diff changeset
   782
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   783
     * @throws  ClassFormatError
90ce3da70b43 Initial load
duke
parents:
diff changeset
   784
     *          If the data did not contain a valid class
90ce3da70b43 Initial load
duke
parents:
diff changeset
   785
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   786
     * @throws  IndexOutOfBoundsException
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   787
     *          If either {@code off} or {@code len} is negative, or if
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   788
     *          {@code off+len} is greater than {@code b.length}.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   789
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   790
     * @throws  SecurityException
90ce3da70b43 Initial load
duke
parents:
diff changeset
   791
     *          If an attempt is made to add this class to a package that
90ce3da70b43 Initial load
duke
parents:
diff changeset
   792
     *          contains classes that were signed by a different set of
90ce3da70b43 Initial load
duke
parents:
diff changeset
   793
     *          certificates than this class (which is unsigned), or if
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   794
     *          {@code name} begins with "{@code java.}".
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   795
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   796
     * @see  #loadClass(String, boolean)
90ce3da70b43 Initial load
duke
parents:
diff changeset
   797
     * @see  #resolveClass(Class)
90ce3da70b43 Initial load
duke
parents:
diff changeset
   798
     * @see  java.security.CodeSource
90ce3da70b43 Initial load
duke
parents:
diff changeset
   799
     * @see  java.security.SecureClassLoader
90ce3da70b43 Initial load
duke
parents:
diff changeset
   800
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   801
     * @since  1.1
90ce3da70b43 Initial load
duke
parents:
diff changeset
   802
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
   803
    protected final Class<?> defineClass(String name, byte[] b, int off, int len)
90ce3da70b43 Initial load
duke
parents:
diff changeset
   804
        throws ClassFormatError
90ce3da70b43 Initial load
duke
parents:
diff changeset
   805
    {
90ce3da70b43 Initial load
duke
parents:
diff changeset
   806
        return defineClass(name, b, off, len, null);
90ce3da70b43 Initial load
duke
parents:
diff changeset
   807
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   808
90ce3da70b43 Initial load
duke
parents:
diff changeset
   809
    /* Determine protection domain, and check that:
90ce3da70b43 Initial load
duke
parents:
diff changeset
   810
        - not define java.* class,
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   811
        - signer of this class matches signers for the rest of the classes in
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   812
          package.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   813
    */
90ce3da70b43 Initial load
duke
parents:
diff changeset
   814
    private ProtectionDomain preDefineClass(String name,
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   815
                                            ProtectionDomain pd)
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   816
    {
90ce3da70b43 Initial load
duke
parents:
diff changeset
   817
        if (!checkName(name))
90ce3da70b43 Initial load
duke
parents:
diff changeset
   818
            throw new NoClassDefFoundError("IllegalName: " + name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
   819
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   820
        if ((name != null) && name.startsWith("java.")
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   821
                && this != getBuiltinPlatformClassLoader()) {
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   822
            throw new SecurityException
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   823
                ("Prohibited package name: " +
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   824
                 name.substring(0, name.lastIndexOf('.')));
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   825
        }
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   826
        if (pd == null) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   827
            pd = defaultDomain;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   828
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   829
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   830
        if (name != null) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   831
            checkCerts(name, pd.getCodeSource());
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   832
        }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   833
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   834
        return pd;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   835
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   836
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   837
    private String defineClassSourceLocation(ProtectionDomain pd) {
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   838
        CodeSource cs = pd.getCodeSource();
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   839
        String source = null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
   840
        if (cs != null && cs.getLocation() != null) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
   841
            source = cs.getLocation().toString();
90ce3da70b43 Initial load
duke
parents:
diff changeset
   842
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   843
        return source;
90ce3da70b43 Initial load
duke
parents:
diff changeset
   844
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   845
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   846
    private void postDefineClass(Class<?> c, ProtectionDomain pd) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   847
        // define a named package, if not present
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   848
        getNamedPackage(c.getPackageName(), c.getModule());
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   849
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   850
        if (pd.getCodeSource() != null) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   851
            Certificate certs[] = pd.getCodeSource().getCertificates();
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   852
            if (certs != null)
90ce3da70b43 Initial load
duke
parents:
diff changeset
   853
                setSigners(c, certs);
90ce3da70b43 Initial load
duke
parents:
diff changeset
   854
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   855
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   856
90ce3da70b43 Initial load
duke
parents:
diff changeset
   857
    /**
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   858
     * Converts an array of bytes into an instance of class {@code Class},
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   859
     * with a given {@code ProtectionDomain}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   860
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   861
     * <p> If the given {@code ProtectionDomain} is {@code null},
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   862
     * then a default protection domain will be assigned to the class as specified
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   863
     * in the documentation for {@link #defineClass(String, byte[], int, int)}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   864
     * Before the class can be used it must be resolved.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   865
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   866
     * <p> The first class defined in a package determines the exact set of
90ce3da70b43 Initial load
duke
parents:
diff changeset
   867
     * certificates that all subsequent classes defined in that package must
90ce3da70b43 Initial load
duke
parents:
diff changeset
   868
     * contain.  The set of certificates for a class is obtained from the
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   869
     * {@link java.security.CodeSource CodeSource} within the
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   870
     * {@code ProtectionDomain} of the class.  Any classes added to that
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   871
     * package must contain the same set of certificates or a
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   872
     * {@code SecurityException} will be thrown.  Note that if
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   873
     * {@code name} is {@code null}, this check is not performed.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   874
     * You should always pass in the <a href="#name">binary name</a> of the
90ce3da70b43 Initial load
duke
parents:
diff changeset
   875
     * class you are defining as well as the bytes.  This ensures that the
90ce3da70b43 Initial load
duke
parents:
diff changeset
   876
     * class you are defining is indeed the class you think it is.
90ce3da70b43 Initial load
duke
parents:
diff changeset
   877
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   878
     * <p> If the specified {@code name} begins with "{@code java.}", it can
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   879
     * only be defined by the {@linkplain #getPlatformClassLoader()
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   880
     * platform class loader} or its ancestors; otherwise {@code SecurityException}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   881
     * will be thrown.  If {@code name} is not {@code null}, it must be equal to
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   882
     * the <a href="#name">binary name</a> of the class
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   883
     * specified by the byte array {@code b}, otherwise a {@link
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   884
     * NoClassDefFoundError NoClassDefFoundError} will be thrown.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   885
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   886
     * <p> This method defines a package in this class loader corresponding to the
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   887
     * package of the {@code Class} (if such a package has not already been defined
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   888
     * in this class loader). The name of the defined package is derived from
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   889
     * the <a href="#name">binary name</a> of the class specified by
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   890
     * the byte array {@code b}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   891
     * Other properties of the defined package are as specified by {@link Package}.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   892
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   893
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
   894
     *         The expected <a href="#name">binary name</a> of the class, or
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   895
     *         {@code null} if not known
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   896
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   897
     * @param  b
90ce3da70b43 Initial load
duke
parents:
diff changeset
   898
     *         The bytes that make up the class data. The bytes in positions
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   899
     *         {@code off} through {@code off+len-1} should have the format
9266
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
   900
     *         of a valid class file as defined by
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
   901
     *         <cite>The Java&trade; Virtual Machine Specification</cite>.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   902
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   903
     * @param  off
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   904
     *         The start offset in {@code b} of the class data
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   905
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   906
     * @param  len
90ce3da70b43 Initial load
duke
parents:
diff changeset
   907
     *         The length of the class data
90ce3da70b43 Initial load
duke
parents:
diff changeset
   908
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   909
     * @param  protectionDomain
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   910
     *         The {@code ProtectionDomain} of the class
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   911
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   912
     * @return  The {@code Class} object created from the data,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   913
     *          and {@code ProtectionDomain}.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   914
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   915
     * @throws  ClassFormatError
90ce3da70b43 Initial load
duke
parents:
diff changeset
   916
     *          If the data did not contain a valid class
90ce3da70b43 Initial load
duke
parents:
diff changeset
   917
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   918
     * @throws  NoClassDefFoundError
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   919
     *          If {@code name} is not {@code null} and not equal to the
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   920
     *          <a href="#name">binary name</a> of the class specified by {@code b}
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   921
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   922
     * @throws  IndexOutOfBoundsException
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   923
     *          If either {@code off} or {@code len} is negative, or if
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   924
     *          {@code off+len} is greater than {@code b.length}.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   925
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   926
     * @throws  SecurityException
90ce3da70b43 Initial load
duke
parents:
diff changeset
   927
     *          If an attempt is made to add this class to a package that
90ce3da70b43 Initial load
duke
parents:
diff changeset
   928
     *          contains classes that were signed by a different set of
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   929
     *          certificates than this class, or if {@code name} begins with
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   930
     *          "{@code java.}" and this class loader is not the platform
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   931
     *          class loader or its ancestor.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   932
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
   933
    protected final Class<?> defineClass(String name, byte[] b, int off, int len,
90ce3da70b43 Initial load
duke
parents:
diff changeset
   934
                                         ProtectionDomain protectionDomain)
90ce3da70b43 Initial load
duke
parents:
diff changeset
   935
        throws ClassFormatError
90ce3da70b43 Initial load
duke
parents:
diff changeset
   936
    {
90ce3da70b43 Initial load
duke
parents:
diff changeset
   937
        protectionDomain = preDefineClass(name, protectionDomain);
90ce3da70b43 Initial load
duke
parents:
diff changeset
   938
        String source = defineClassSourceLocation(protectionDomain);
16063
18e7ee7b4301 8009645: ClassFileTransformer hooks in ClassLoader no longer required
alanb
parents: 13589
diff changeset
   939
        Class<?> c = defineClass1(name, b, off, len, protectionDomain, source);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   940
        postDefineClass(c, protectionDomain);
90ce3da70b43 Initial load
duke
parents:
diff changeset
   941
        return c;
90ce3da70b43 Initial load
duke
parents:
diff changeset
   942
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
   943
90ce3da70b43 Initial load
duke
parents:
diff changeset
   944
    /**
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   945
     * Converts a {@link java.nio.ByteBuffer ByteBuffer} into an instance
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   946
     * of class {@code Class}, with the given {@code ProtectionDomain}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   947
     * If the given {@code ProtectionDomain} is {@code null}, then a default
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   948
     * protection domain will be assigned to the class as
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   949
     * specified in the documentation for {@link #defineClass(String, byte[],
90ce3da70b43 Initial load
duke
parents:
diff changeset
   950
     * int, int)}.  Before the class can be used it must be resolved.
90ce3da70b43 Initial load
duke
parents:
diff changeset
   951
     *
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   952
     * <p>The rules about the first class defined in a package determining the
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   953
     * set of certificates for the package, the restrictions on class names,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   954
     * and the defined package of the class
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   955
     * are identical to those specified in the documentation for {@link
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   956
     * #defineClass(String, byte[], int, int, ProtectionDomain)}.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   957
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   958
     * <p> An invocation of this method of the form
90ce3da70b43 Initial load
duke
parents:
diff changeset
   959
     * <i>cl</i><tt>.defineClass(</tt><i>name</i><tt>,</tt>
90ce3da70b43 Initial load
duke
parents:
diff changeset
   960
     * <i>bBuffer</i><tt>,</tt> <i>pd</i><tt>)</tt> yields exactly the same
90ce3da70b43 Initial load
duke
parents:
diff changeset
   961
     * result as the statements
90ce3da70b43 Initial load
duke
parents:
diff changeset
   962
     *
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
   963
     *<p> <tt>
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   964
     * ...<br>
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
   965
     * byte[] temp = new byte[bBuffer.{@link
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   966
     * java.nio.ByteBuffer#remaining remaining}()];<br>
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
   967
     *     bBuffer.{@link java.nio.ByteBuffer#get(byte[])
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   968
     * get}(temp);<br>
90ce3da70b43 Initial load
duke
parents:
diff changeset
   969
     *     return {@link #defineClass(String, byte[], int, int, ProtectionDomain)
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
   970
     * cl.defineClass}(name, temp, 0,
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
   971
     * temp.length, pd);<br>
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
   972
     * </tt></p>
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   973
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   974
     * @param  name
6519
1a7d0030a638 6977548: Broken link in ClassLoader.defineClass javadoc
mchung
parents: 5506
diff changeset
   975
     *         The expected <a href="#name">binary name</a>. of the class, or
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   976
     *         <tt>null</tt> if not known
90ce3da70b43 Initial load
duke
parents:
diff changeset
   977
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   978
     * @param  b
90ce3da70b43 Initial load
duke
parents:
diff changeset
   979
     *         The bytes that make up the class data. The bytes from positions
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   980
     *         <tt>b.position()</tt> through <tt>b.position() + b.limit() -1
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
   981
     *         </tt> should have the format of a valid class file as defined by
9266
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
   982
     *         <cite>The Java&trade; Virtual Machine Specification</cite>.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   983
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   984
     * @param  protectionDomain
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   985
     *         The {@code ProtectionDomain} of the class, or {@code null}.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   986
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   987
     * @return  The {@code Class} object created from the data,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   988
     *          and {@code ProtectionDomain}.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   989
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   990
     * @throws  ClassFormatError
90ce3da70b43 Initial load
duke
parents:
diff changeset
   991
     *          If the data did not contain a valid class.
90ce3da70b43 Initial load
duke
parents:
diff changeset
   992
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   993
     * @throws  NoClassDefFoundError
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   994
     *          If {@code name} is not {@code null} and not equal to the
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
   995
     *          <a href="#name">binary name</a> of the class specified by {@code b}
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
   996
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
   997
     * @throws  SecurityException
90ce3da70b43 Initial load
duke
parents:
diff changeset
   998
     *          If an attempt is made to add this class to a package that
90ce3da70b43 Initial load
duke
parents:
diff changeset
   999
     *          contains classes that were signed by a different set of
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1000
     *          certificates than this class, or if {@code name} begins with
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1001
     *          "{@code java.}".
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1002
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1003
     * @see      #defineClass(String, byte[], int, int, ProtectionDomain)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1004
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1005
     * @since  1.5
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1006
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1007
    protected final Class<?> defineClass(String name, java.nio.ByteBuffer b,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1008
                                         ProtectionDomain protectionDomain)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1009
        throws ClassFormatError
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1010
    {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1011
        int len = b.remaining();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1012
25979
42e5d9f8087e 8054857: Fix typos in java.lang.** packages
prappo
parents: 25167
diff changeset
  1013
        // Use byte[] if not a direct ByteBuffer:
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1014
        if (!b.isDirect()) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1015
            if (b.hasArray()) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1016
                return defineClass(name, b.array(),
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1017
                                   b.position() + b.arrayOffset(), len,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1018
                                   protectionDomain);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1019
            } else {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1020
                // no array, or read-only array
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1021
                byte[] tb = new byte[len];
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1022
                b.get(tb);  // get bytes out of byte buffer.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1023
                return defineClass(name, tb, 0, len, protectionDomain);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1024
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1025
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1026
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1027
        protectionDomain = preDefineClass(name, protectionDomain);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1028
        String source = defineClassSourceLocation(protectionDomain);
16063
18e7ee7b4301 8009645: ClassFileTransformer hooks in ClassLoader no longer required
alanb
parents: 13589
diff changeset
  1029
        Class<?> c = defineClass2(name, b, b.position(), len, protectionDomain, source);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1030
        postDefineClass(c, protectionDomain);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1031
        return c;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1032
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1033
11117
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
  1034
    private native Class<?> defineClass1(String name, byte[] b, int off, int len,
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
  1035
                                         ProtectionDomain pd, String source);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1036
11117
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
  1037
    private native Class<?> defineClass2(String name, java.nio.ByteBuffer b,
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
  1038
                                         int off, int len, ProtectionDomain pd,
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
  1039
                                         String source);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1040
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1041
    // true if the name is null or has the potential to be a valid binary name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1042
    private boolean checkName(String name) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1043
        if ((name == null) || (name.length() == 0))
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1044
            return true;
22571
985dc9e27435 6516909: (cl spec) ClassLoader.loadClass() clarification to indicate it shouldn't be used for array classes
mchung
parents: 22570
diff changeset
  1045
        if ((name.indexOf('/') != -1) || (name.charAt(0) == '['))
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1046
            return false;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1047
        return true;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1048
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1049
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1050
    private void checkCerts(String name, CodeSource cs) {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1051
        int i = name.lastIndexOf('.');
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1052
        String pname = (i == -1) ? "" : name.substring(0, i);
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1053
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1054
        Certificate[] certs = null;
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1055
        if (cs != null) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1056
            certs = cs.getCertificates();
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1057
        }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1058
        Certificate[] pcerts = null;
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1059
        if (parallelLockMap == null) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1060
            synchronized (this) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1061
                pcerts = package2certs.get(pname);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1062
                if (pcerts == null) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1063
                    package2certs.put(pname, (certs == null? nocerts:certs));
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1064
                }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1065
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1066
        } else {
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1067
            pcerts = ((ConcurrentHashMap<String, Certificate[]>)package2certs).
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1068
                putIfAbsent(pname, (certs == null? nocerts:certs));
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1069
        }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1070
        if (pcerts != null && !compareCerts(pcerts, certs)) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1071
            throw new SecurityException("class \""+ name +
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1072
                 "\"'s signer information does not match signer information of other classes in the same package");
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1073
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1074
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1075
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1076
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1077
     * check to make sure the certs for the new class (certs) are the same as
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1078
     * the certs for the first class inserted in the package (pcerts)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1079
     */
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  1080
    private boolean compareCerts(Certificate[] pcerts,
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  1081
                                 Certificate[] certs)
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1082
    {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1083
        // certs can be null, indicating no certs.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1084
        if ((certs == null) || (certs.length == 0)) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1085
            return pcerts.length == 0;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1086
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1087
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1088
        // the length must be the same at this point
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1089
        if (certs.length != pcerts.length)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1090
            return false;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1091
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1092
        // go through and make sure all the certs in one array
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1093
        // are in the other and vice-versa.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1094
        boolean match;
22581
e868cde95050 8032779: Update code in java.lang to use newer language features
psandoz
parents: 22571
diff changeset
  1095
        for (Certificate cert : certs) {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1096
            match = false;
22581
e868cde95050 8032779: Update code in java.lang to use newer language features
psandoz
parents: 22571
diff changeset
  1097
            for (Certificate pcert : pcerts) {
e868cde95050 8032779: Update code in java.lang to use newer language features
psandoz
parents: 22571
diff changeset
  1098
                if (cert.equals(pcert)) {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1099
                    match = true;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1100
                    break;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1101
                }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1102
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1103
            if (!match) return false;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1104
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1105
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1106
        // now do the same for pcerts
22581
e868cde95050 8032779: Update code in java.lang to use newer language features
psandoz
parents: 22571
diff changeset
  1107
        for (Certificate pcert : pcerts) {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1108
            match = false;
22581
e868cde95050 8032779: Update code in java.lang to use newer language features
psandoz
parents: 22571
diff changeset
  1109
            for (Certificate cert : certs) {
e868cde95050 8032779: Update code in java.lang to use newer language features
psandoz
parents: 22571
diff changeset
  1110
                if (pcert.equals(cert)) {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1111
                    match = true;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1112
                    break;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1113
                }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1114
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1115
            if (!match) return false;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1116
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1117
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1118
        return true;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1119
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1120
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1121
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1122
     * Links the specified class.  This (misleadingly named) method may be
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1123
     * used by a class loader to link a class.  If the class <tt>c</tt> has
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1124
     * already been linked, then this method simply returns. Otherwise, the
9266
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
  1125
     * class is linked as described in the "Execution" chapter of
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
  1126
     * <cite>The Java&trade; Language Specification</cite>.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1127
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1128
     * @param  c
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1129
     *         The class to link
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1130
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1131
     * @throws  NullPointerException
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1132
     *          If <tt>c</tt> is <tt>null</tt>.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1133
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1134
     * @see  #defineClass(String, byte[], int, int)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1135
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1136
    protected final void resolveClass(Class<?> c) {
27184
2996674bd701 8057777: Cleanup of old and unused VM interfaces
fparain
parents: 25991
diff changeset
  1137
        if (c == null) {
2996674bd701 8057777: Cleanup of old and unused VM interfaces
fparain
parents: 25991
diff changeset
  1138
            throw new NullPointerException();
2996674bd701 8057777: Cleanup of old and unused VM interfaces
fparain
parents: 25991
diff changeset
  1139
        }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1140
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1141
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1142
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1143
     * Finds a class with the specified <a href="#name">binary name</a>,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1144
     * loading it if necessary.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1145
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1146
     * <p> This method loads the class through the system class loader (see
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1147
     * {@link #getSystemClassLoader()}).  The <tt>Class</tt> object returned
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1148
     * might have more than one <tt>ClassLoader</tt> associated with it.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1149
     * Subclasses of <tt>ClassLoader</tt> need not usually invoke this method,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1150
     * because most class loaders need to override just {@link
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1151
     * #findClass(String)}.  </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1152
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1153
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1154
     *         The <a href="#name">binary name</a> of the class
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1155
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1156
     * @return  The <tt>Class</tt> object for the specified <tt>name</tt>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1157
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1158
     * @throws  ClassNotFoundException
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1159
     *          If the class could not be found
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1160
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1161
     * @see  #ClassLoader(ClassLoader)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1162
     * @see  #getParent()
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1163
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1164
    protected final Class<?> findSystemClass(String name)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1165
        throws ClassNotFoundException
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1166
    {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1167
        ClassLoader system = getSystemClassLoader();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1168
        if (system == null) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1169
            if (!checkName(name))
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1170
                throw new ClassNotFoundException(name);
11117
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
  1171
            Class<?> cls = findBootstrapClass(name);
3833
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1172
            if (cls == null) {
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1173
                throw new ClassNotFoundException(name);
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1174
            }
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1175
            return cls;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1176
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1177
        return system.loadClass(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1178
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1179
3833
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1180
    /**
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1181
     * Returns a class loaded by the bootstrap class loader;
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1182
     * or return null if not found.
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1183
     */
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1184
    Class<?> findBootstrapClassOrNull(String name) {
3833
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1185
        if (!checkName(name)) return null;
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1186
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1187
        return findBootstrapClass(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1188
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1189
3833
b666ed188811 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading
mchung
parents: 3111
diff changeset
  1190
    // return null if not found
11117
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
  1191
    private native Class<?> findBootstrapClass(String name);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1192
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1193
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1194
     * Returns the class with the given <a href="#name">binary name</a> if this
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1195
     * loader has been recorded by the Java virtual machine as an initiating
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1196
     * loader of a class with that <a href="#name">binary name</a>.  Otherwise
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1197
     * <tt>null</tt> is returned.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1198
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1199
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1200
     *         The <a href="#name">binary name</a> of the class
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1201
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1202
     * @return  The <tt>Class</tt> object, or <tt>null</tt> if the class has
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1203
     *          not been loaded
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1204
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1205
     * @since  1.1
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1206
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1207
    protected final Class<?> findLoadedClass(String name) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1208
        if (!checkName(name))
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1209
            return null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1210
        return findLoadedClass0(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1211
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1212
32649
2ee9017c7597 8136583: Core libraries should use blessed modifier order
martin
parents: 31084
diff changeset
  1213
    private final native Class<?> findLoadedClass0(String name);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1214
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1215
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1216
     * Sets the signers of a class.  This should be invoked after defining a
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1217
     * class.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1218
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1219
     * @param  c
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1220
     *         The <tt>Class</tt> object
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1221
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1222
     * @param  signers
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1223
     *         The signers for the class
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1224
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1225
     * @since  1.1
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1226
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1227
    protected final void setSigners(Class<?> c, Object[] signers) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1228
        c.setSigners(signers);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1229
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1230
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1231
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1232
    // -- Resources --
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1233
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1234
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1235
     * Returns a URL to a resource in a module defined to this class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1236
     * Class loader implementations that support the loading from modules
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1237
     * should override this method.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1238
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1239
     * @implSpec The default implementation returns {@code null}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1240
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1241
     * @param  moduleName
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1242
     *         The module name
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1243
     * @param  name
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1244
     *         The resource name
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1245
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1246
     * @return A URL to the resource; {@code null} if the resource could not be
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1247
     *         found, a URL could not be constructed to locate the resource,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1248
     *         access to the resource is denied by the security manager, or
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1249
     *         there isn't a module of the given name defined to the class
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1250
     *         loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1251
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1252
     * @throws IOException
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1253
     *         If I/O errors occur
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1254
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1255
     * @see java.lang.module.ModuleReader#find(String)
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1256
     * @since 9
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1257
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1258
    protected URL findResource(String moduleName, String name) throws IOException {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1259
        return null;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1260
    }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1261
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1262
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1263
     * Finds the resource with the given name.  A resource is some data
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1264
     * (images, audio, text, etc) that can be accessed by class code in a way
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1265
     * that is independent of the location of the code.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1266
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1267
     * Resources in a named module are private to that module. This method does
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1268
     * not find resource in named modules.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1269
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1270
     * <p> The name of a resource is a '<tt>/</tt>'-separated path name that
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1271
     * identifies the resource.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1272
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1273
     * <p> This method will first search the parent class loader for the
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1274
     * resource; if the parent is <tt>null</tt> the path of the class loader
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1275
     * built-in to the virtual machine is searched.  That failing, this method
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1276
     * will invoke {@link #findResource(String)} to find the resource.  </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1277
     *
20782
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1278
     * @apiNote When overriding this method it is recommended that an
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1279
     * implementation ensures that any delegation is consistent with the {@link
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1280
     * #getResources(java.lang.String) getResources(String)} method.
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1281
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1282
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1283
     *         The resource name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1284
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1285
     * @return  A <tt>URL</tt> object for reading the resource, or
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1286
     *          <tt>null</tt> if the resource could not be found or the invoker
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1287
     *          doesn't have adequate  privileges to get the resource.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1288
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1289
     * @since  1.1
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1290
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1291
    public URL getResource(String name) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1292
        URL url;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1293
        if (parent != null) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1294
            url = parent.getResource(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1295
        } else {
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1296
            url = BootLoader.findResource(name);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1297
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1298
        if (url == null) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1299
            url = findResource(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1300
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1301
        return url;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1302
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1303
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1304
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1305
     * Finds all the resources with the given name. A resource is some data
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1306
     * (images, audio, text, etc) that can be accessed by class code in a way
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1307
     * that is independent of the location of the code.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1308
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1309
     * Resources in a named module are private to that module. This method does
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1310
     * not find resources in named modules.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1311
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1312
     * <p>The name of a resource is a <tt>/</tt>-separated path name that
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1313
     * identifies the resource.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1314
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1315
     * <p> The search order is described in the documentation for {@link
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1316
     * #getResource(String)}.  </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1317
     *
20782
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1318
     * @apiNote When overriding this method it is recommended that an
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1319
     * implementation ensures that any delegation is consistent with the {@link
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1320
     * #getResource(java.lang.String) getResource(String)} method. This should
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1321
     * ensure that the first element returned by the Enumeration's
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1322
     * {@code nextElement} method is the same resource that the
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1323
     * {@code getResource(String)} method would return.
2711da7ccd30 8024704: Improve API documentation of ClassLoader and ServiceLoader with respect to enumeration of resources.
dfuchs
parents: 18776
diff changeset
  1324
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1325
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1326
     *         The resource name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1327
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1328
     * @return  An enumeration of {@link java.net.URL <tt>URL</tt>} objects for
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1329
     *          the resource.  If no resources could  be found, the enumeration
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1330
     *          will be empty.  Resources that the class loader doesn't have
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1331
     *          access to will not be in the enumeration.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1332
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1333
     * @throws  IOException
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1334
     *          If I/O errors occur
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1335
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1336
     * @see  #findResources(String)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1337
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1338
     * @since  1.2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1339
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1340
    public Enumeration<URL> getResources(String name) throws IOException {
11275
7cb0861d512f 7117612: Miscellaneous warnings in java.lang
omajid
parents: 11117
diff changeset
  1341
        @SuppressWarnings("unchecked")
7cb0861d512f 7117612: Miscellaneous warnings in java.lang
omajid
parents: 11117
diff changeset
  1342
        Enumeration<URL>[] tmp = (Enumeration<URL>[]) new Enumeration<?>[2];
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1343
        if (parent != null) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1344
            tmp[0] = parent.getResources(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1345
        } else {
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1346
            tmp[0] = BootLoader.findResources(name);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1347
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1348
        tmp[1] = findResources(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1349
7803
56bc97d69d93 6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents: 7029
diff changeset
  1350
        return new CompoundEnumeration<>(tmp);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1351
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1352
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1353
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1354
     * Finds the resource with the given name. Class loader implementations
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1355
     * should override this method to specify where to find resources.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1356
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1357
     * Resources in a named module are private to that module. This method does
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1358
     * not find resources in named modules defined to this class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1359
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1360
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1361
     *         The resource name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1362
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1363
     * @return  A <tt>URL</tt> object for reading the resource, or
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1364
     *          <tt>null</tt> if the resource could not be found
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1365
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1366
     * @since  1.2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1367
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1368
    protected URL findResource(String name) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1369
        return null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1370
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1371
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1372
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1373
     * Returns an enumeration of {@link java.net.URL <tt>URL</tt>} objects
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1374
     * representing all the resources with the given name. Class loader
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1375
     * implementations should override this method to specify where to load
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1376
     * resources from.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1377
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1378
     * Resources in a named module are private to that module. This method does
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1379
     * not find resources in named modules defined to this class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1380
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1381
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1382
     *         The resource name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1383
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1384
     * @return  An enumeration of {@link java.net.URL <tt>URL</tt>} objects for
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1385
     *          the resources
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1386
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1387
     * @throws  IOException
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1388
     *          If I/O errors occur
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1389
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1390
     * @since  1.2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1391
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1392
    protected Enumeration<URL> findResources(String name) throws IOException {
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  1393
        return java.util.Collections.emptyEnumeration();
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1394
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1395
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1396
    /**
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1397
     * Registers the caller as parallel capable.
6890
43cb79a6b123 6887853: javadoc for java.lang.Classloader should be more clear
valeriep
parents: 6519
diff changeset
  1398
     * The registration succeeds if and only if all of the following
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1399
     * conditions are met:
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1400
     * <ol>
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1401
     * <li> no instance of the caller has been created</li>
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1402
     * <li> all of the super classes (except class Object) of the caller are
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1403
     * registered as parallel capable</li>
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1404
     * </ol>
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1405
     * <p>Note that once a class loader is registered as parallel capable, there
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1406
     * is no way to change it back.</p>
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1407
     *
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1408
     * @return  true if the caller is successfully registered as
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1409
     *          parallel capable and false if otherwise.
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1410
     *
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1411
     * @since   1.7
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1412
     */
16906
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1413
    @CallerSensitive
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1414
    protected static boolean registerAsParallelCapable() {
16906
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1415
        Class<? extends ClassLoader> callerClass =
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1416
            Reflection.getCallerClass().asSubclass(ClassLoader.class);
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1417
        return ParallelLoaders.register(callerClass);
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1418
    }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1419
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1420
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1421
     * Find a resource of the specified name from the search path used to load
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1422
     * classes.  This method locates the resource through the system class
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1423
     * loader (see {@link #getSystemClassLoader()}).
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1424
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1425
     * Resources in a named module are private to that module. This method does
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1426
     * not find resources in named modules.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1427
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1428
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1429
     *         The resource name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1430
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1431
     * @return  A {@link java.net.URL <tt>URL</tt>} object for reading the
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1432
     *          resource, or <tt>null</tt> if the resource could not be found
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1433
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1434
     * @since  1.1
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1435
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1436
    public static URL getSystemResource(String name) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1437
        ClassLoader system = getSystemClassLoader();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1438
        if (system == null) {
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1439
            return BootLoader.findResource(name);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1440
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1441
        return system.getResource(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1442
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1443
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1444
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1445
     * Finds all resources of the specified name from the search path used to
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1446
     * load classes.  The resources thus found are returned as an
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1447
     * {@link java.util.Enumeration <tt>Enumeration</tt>} of {@link
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1448
     * java.net.URL <tt>URL</tt>} objects.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1449
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1450
     * Resources in a named module are private to that module. This method does
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1451
     * not find resources in named modules.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1452
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1453
     * <p> The search order is described in the documentation for {@link
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1454
     * #getSystemResource(String)}.  </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1455
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1456
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1457
     *         The resource name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1458
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1459
     * @return  An enumeration of resource {@link java.net.URL <tt>URL</tt>}
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1460
     *          objects
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1461
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1462
     * @throws  IOException
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1463
     *          If I/O errors occur
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1464
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1465
     * @since  1.2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1466
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1467
    public static Enumeration<URL> getSystemResources(String name)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1468
        throws IOException
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1469
    {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1470
        ClassLoader system = getSystemClassLoader();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1471
        if (system == null) {
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1472
            return BootLoader.findResources(name);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1473
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1474
        return system.getResources(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1475
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1476
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1477
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1478
     * Returns an input stream for reading the specified resource.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1479
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1480
     * Resources in a named module are private to that module. This method does
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1481
     * not find resources in named modules.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1482
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1483
     * <p> The search order is described in the documentation for {@link
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1484
     * #getResource(String)}.  </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1485
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1486
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1487
     *         The resource name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1488
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1489
     * @return  An input stream for reading the resource, or <tt>null</tt>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1490
     *          if the resource could not be found
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1491
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1492
     * @since  1.1
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1493
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1494
    public InputStream getResourceAsStream(String name) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1495
        URL url = getResource(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1496
        try {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1497
            return url != null ? url.openStream() : null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1498
        } catch (IOException e) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1499
            return null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1500
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1501
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1502
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1503
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1504
     * Open for reading, a resource of the specified name from the search path
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1505
     * used to load classes.  This method locates the resource through the
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  1506
     * system class loader (see {@link #getSystemClassLoader()}).
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1507
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1508
     * Resources in a named module are private to that module. This method does
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1509
     * not find resources in named modules.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1510
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1511
     * @param  name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1512
     *         The resource name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1513
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1514
     * @return  An input stream for reading the resource, or <tt>null</tt>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1515
     *          if the resource could not be found
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1516
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1517
     * @since  1.1
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1518
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1519
    public static InputStream getSystemResourceAsStream(String name) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1520
        URL url = getSystemResource(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1521
        try {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1522
            return url != null ? url.openStream() : null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1523
        } catch (IOException e) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1524
            return null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1525
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1526
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1527
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1528
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1529
    // -- Hierarchy --
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1530
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1531
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1532
     * Returns the parent class loader for delegation. Some implementations may
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1533
     * use <tt>null</tt> to represent the bootstrap class loader. This method
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1534
     * will return <tt>null</tt> in such implementations if this class loader's
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1535
     * parent is the bootstrap class loader.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1536
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1537
     * <p> If a security manager is present, and the invoker's class loader is
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1538
     * not <tt>null</tt> and is not an ancestor of this class loader, then this
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1539
     * method invokes the security manager's {@link
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1540
     * SecurityManager#checkPermission(java.security.Permission)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1541
     * <tt>checkPermission</tt>} method with a {@link
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1542
     * RuntimePermission#RuntimePermission(String)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1543
     * <tt>RuntimePermission("getClassLoader")</tt>} permission to verify
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1544
     * access to the parent class loader is permitted.  If not, a
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1545
     * <tt>SecurityException</tt> will be thrown.  </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1546
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1547
     * @return  The parent <tt>ClassLoader</tt>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1548
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1549
     * @throws  SecurityException
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1550
     *          If a security manager exists and its <tt>checkPermission</tt>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1551
     *          method doesn't allow access to this class loader's parent class
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1552
     *          loader.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1553
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1554
     * @since  1.2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1555
     */
16906
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1556
    @CallerSensitive
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1557
    public final ClassLoader getParent() {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1558
        if (parent == null)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1559
            return null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1560
        SecurityManager sm = System.getSecurityManager();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1561
        if (sm != null) {
28544
a132e8e301e5 8055314: Update refactoring for new loader
mchung
parents: 28521
diff changeset
  1562
            // Check access to the parent class loader
a132e8e301e5 8055314: Update refactoring for new loader
mchung
parents: 28521
diff changeset
  1563
            // If the caller's class loader is same as this class loader,
a132e8e301e5 8055314: Update refactoring for new loader
mchung
parents: 28521
diff changeset
  1564
            // permission check is performed.
a132e8e301e5 8055314: Update refactoring for new loader
mchung
parents: 28521
diff changeset
  1565
            checkClassLoaderPermission(parent, Reflection.getCallerClass());
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1566
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1567
        return parent;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1568
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1569
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1570
    /**
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1571
     * Returns the unnamed {@code Module} for this class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1572
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1573
     * @return The unnamed Module for this class loader
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1574
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1575
     * @see Module#isNamed()
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1576
     * @since 9
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1577
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1578
    public final Module getUnnamedModule() {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1579
        return unnamedModule;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1580
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1581
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1582
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1583
     * Returns the platform class loader for delegation.  All
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1584
     * <a href="#builtinLoaders">platform classes</a> are visible to
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1585
     * the platform class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1586
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1587
     * @return  The platform {@code ClassLoader}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1588
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1589
     * @throws  SecurityException
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1590
     *          If a security manager exists and the caller's class loader is
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1591
     *          not {@code null} and the caller's class loader is not the same
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1592
     *          as or an ancestor of the platform class loader,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1593
     *          and the {@link SecurityManager#checkPermission(java.security.Permission)
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1594
     *          checkPermission} method denies {@code RuntimePermission("getClassLoader")}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1595
     *          to access the platform class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1596
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1597
     * @since 9
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1598
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1599
    @CallerSensitive
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1600
    public static ClassLoader getPlatformClassLoader() {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1601
        SecurityManager sm = System.getSecurityManager();
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1602
        ClassLoader loader = getBuiltinPlatformClassLoader();
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1603
        if (sm != null) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1604
            checkClassLoaderPermission(loader, Reflection.getCallerClass());
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1605
        }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1606
        return loader;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1607
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1608
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1609
    /**
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1610
     * Returns the system class loader for delegation.  This is the default
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1611
     * delegation parent for new <tt>ClassLoader</tt> instances, and is
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1612
     * typically the class loader used to start the application.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1613
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1614
     * <p> This method is first invoked early in the runtime's startup
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1615
     * sequence, at which point it creates the system class loader. This
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1616
     * class loader will be the context class loader for the main application
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1617
     * thread (for example, the thread that invokes the {@code main} method of
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1618
     * the main class).
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1619
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1620
     * <p> The default system class loader is an implementation-dependent
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1621
     * instance of this class.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1622
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1623
     * <p> If the system property "<tt>java.system.class.loader</tt>" is defined
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1624
     * when this method is first invoked then the value of that property is
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1625
     * taken to be the name of a class that will be returned as the system
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1626
     * class loader.  The class is loaded using the default system class loader
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1627
     * and must define a public constructor that takes a single parameter of
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1628
     * type <tt>ClassLoader</tt> which is used as the delegation parent.  An
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1629
     * instance is then created using this constructor with the default system
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1630
     * class loader as the parameter.  The resulting class loader is defined
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1631
     * to be the system class loader. During construction, the class loader
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1632
     * should take great care to avoid calling {@code getSystemClassLoader()}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1633
     * If circular initialization of the system class loader is detected then
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1634
     * an unspecified error or exception is thrown.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1635
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1636
     * <p> If a security manager is present, and the invoker's class loader is
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1637
     * not <tt>null</tt> and the invoker's class loader is not the same as or
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1638
     * an ancestor of the system class loader, then this method invokes the
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1639
     * security manager's {@link
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1640
     * SecurityManager#checkPermission(java.security.Permission)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1641
     * <tt>checkPermission</tt>} method with a {@link
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1642
     * RuntimePermission#RuntimePermission(String)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1643
     * <tt>RuntimePermission("getClassLoader")</tt>} permission to verify
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1644
     * access to the system class loader.  If not, a
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1645
     * <tt>SecurityException</tt> will be thrown.  </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1646
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1647
     * @implNote The system property to override the system class loader is not
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1648
     * examined until the VM is almost fully initialized. Code that executes
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1649
     * this method during startup should take care not to cache the return
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1650
     * value until the system is fully initialized.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1651
     *
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1652
     * @return  The system <tt>ClassLoader</tt> for delegation, or
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1653
     *          <tt>null</tt> if none
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1654
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1655
     * @throws  SecurityException
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1656
     *          If a security manager exists and its <tt>checkPermission</tt>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1657
     *          method doesn't allow access to the system class loader.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1658
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1659
     * @throws  IllegalStateException
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1660
     *          If invoked recursively during the construction of the class
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1661
     *          loader specified by the "<tt>java.system.class.loader</tt>"
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1662
     *          property.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1663
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1664
     * @throws  Error
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1665
     *          If the system property "<tt>java.system.class.loader</tt>"
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1666
     *          is defined but the named class could not be loaded, the
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1667
     *          provider class does not define the required constructor, or an
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1668
     *          exception is thrown by that constructor when it is invoked. The
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1669
     *          underlying cause of the error can be retrieved via the
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1670
     *          {@link Throwable#getCause()} method.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1671
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1672
     * @revised  1.4
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1673
     */
16906
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1674
    @CallerSensitive
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1675
    public static ClassLoader getSystemClassLoader() {
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1676
        switch (VM.initLevel()) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1677
            case 0:
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1678
            case 1:
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1679
            case 2:
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1680
                // the system class loader is the built-in app class loader during startup
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1681
                return getBuiltinAppClassLoader();
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1682
            case 3:
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1683
                throw new InternalError("getSystemClassLoader should only be called after VM booted");
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1684
            case 4:
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1685
                // system fully initialized
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1686
                assert VM.isBooted() && scl != null;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1687
                SecurityManager sm = System.getSecurityManager();
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1688
                if (sm != null) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1689
                    checkClassLoaderPermission(scl, Reflection.getCallerClass());
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1690
                }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1691
                return scl;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1692
            default:
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1693
                throw new InternalError("should not reach here");
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1694
        }
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1695
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1696
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1697
    static ClassLoader getBuiltinPlatformClassLoader() {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1698
        return ClassLoaders.platformClassLoader();
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1699
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1700
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1701
    static ClassLoader getBuiltinAppClassLoader() {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1702
        return ClassLoaders.appClassLoader();
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1703
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1704
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1705
    /*
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1706
     * Initialize the system class loader that may be a custom class on the
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1707
     * application class path or application module path.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1708
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1709
     * @see java.lang.System#initPhase3
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1710
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1711
    static synchronized ClassLoader initSystemClassLoader() {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1712
        if (VM.initLevel() != 3) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1713
            throw new InternalError("system class loader cannot be set at initLevel " +
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1714
                                    VM.initLevel());
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1715
        }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1716
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1717
        // detect recursive initialization
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1718
        if (scl != null) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1719
            throw new IllegalStateException("recursive invocation");
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1720
        }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1721
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1722
        ClassLoader builtinLoader = getBuiltinAppClassLoader();
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1723
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1724
        // All are privileged frames.  No need to call doPrivileged.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1725
        String cn = System.getProperty("java.system.class.loader");
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1726
        if (cn != null) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1727
            try {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1728
                // custom class loader is only supported to be loaded from unnamed module
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1729
                Constructor<?> ctor = Class.forName(cn, false, builtinLoader)
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1730
                                           .getDeclaredConstructor(ClassLoader.class);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1731
                scl = (ClassLoader) ctor.newInstance(builtinLoader);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1732
            } catch (Exception e) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1733
                throw new Error(e);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1734
            }
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1735
        } else {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1736
            scl = builtinLoader;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1737
        }
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1738
        return scl;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1739
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1740
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1741
    // Returns true if the specified class loader can be found in this class
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1742
    // loader's delegation chain.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1743
    boolean isAncestor(ClassLoader cl) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1744
        ClassLoader acl = this;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1745
        do {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1746
            acl = acl.parent;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1747
            if (cl == acl) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1748
                return true;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1749
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1750
        } while (acl != null);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1751
        return false;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1752
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1753
13589
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1754
    // Tests if class loader access requires "getClassLoader" permission
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1755
    // check.  A class loader 'from' can access class loader 'to' if
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1756
    // class loader 'from' is same as class loader 'to' or an ancestor
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1757
    // of 'to'.  The class loader in a system domain can access
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1758
    // any class loader.
16906
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1759
    private static boolean needsClassLoaderPermissionCheck(ClassLoader from,
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1760
                                                           ClassLoader to)
13589
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1761
    {
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1762
        if (from == to)
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1763
            return false;
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1764
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1765
        if (from == null)
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1766
            return false;
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1767
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1768
        return !to.isAncestor(from);
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1769
    }
da4cb574f4a6 7193339: Prepare system classes be defined by a non-null module loader
mchung
parents: 12298
diff changeset
  1770
16906
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1771
    // Returns the class's class loader, or null if none.
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1772
    static ClassLoader getClassLoader(Class<?> caller) {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1773
        // This can be null if the VM is requesting it
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1774
        if (caller == null) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1775
            return null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1776
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1777
        // Circumvent security check since this is package-private
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1778
        return caller.getClassLoader0();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1779
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1780
28544
a132e8e301e5 8055314: Update refactoring for new loader
mchung
parents: 28521
diff changeset
  1781
    /*
a132e8e301e5 8055314: Update refactoring for new loader
mchung
parents: 28521
diff changeset
  1782
     * Checks RuntimePermission("getClassLoader") permission
a132e8e301e5 8055314: Update refactoring for new loader
mchung
parents: 28521
diff changeset
  1783
     * if caller's class loader is not null and caller's class loader
a132e8e301e5 8055314: Update refactoring for new loader
mchung
parents: 28521
diff changeset
  1784
     * is not the same as or an ancestor of the given cl argument.
a132e8e301e5 8055314: Update refactoring for new loader
mchung
parents: 28521
diff changeset
  1785
     */
16906
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1786
    static void checkClassLoaderPermission(ClassLoader cl, Class<?> caller) {
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1787
        SecurityManager sm = System.getSecurityManager();
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1788
        if (sm != null) {
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1789
            // caller can be null if the VM is requesting it
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1790
            ClassLoader ccl = getClassLoader(caller);
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1791
            if (needsClassLoaderPermissionCheck(ccl, cl)) {
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1792
                sm.checkPermission(SecurityConstants.GET_CLASSLOADER_PERMISSION);
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1793
            }
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1794
        }
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1795
    }
44dfee24cb71 8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents: 16479
diff changeset
  1796
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1797
    // The system class loader
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  1798
    // @GuardedBy("ClassLoader.class")
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1799
    private static volatile ClassLoader scl;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1800
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1801
    // -- Package --
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1802
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1803
    /**
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1804
     * Define a Package of the given Class object.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1805
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1806
     * If the given class represents an array type, a primitive type or void,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1807
     * this method returns {@code null}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1808
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1809
     * This method does not throw IllegalArgumentException.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1810
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1811
    Package definePackage(Class<?> c) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1812
        if (c.isPrimitive() || c.isArray()) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1813
            return null;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1814
        }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1815
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1816
        return definePackage(c.getPackageName(), c.getModule());
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1817
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1818
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1819
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1820
     * Defines a Package of the given name and module
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1821
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1822
     * This method does not throw IllegalArgumentException.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1823
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1824
     * @param name package name
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1825
     * @param m    module
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1826
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1827
    Package definePackage(String name, Module m) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1828
        if (name.isEmpty() && m.isNamed()) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1829
            throw new InternalError("unnamed package in  " + m);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1830
        }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1831
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1832
        // check if Package object is already defined
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1833
        NamedPackage pkg = packages.get(name);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1834
        if (pkg instanceof Package)
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1835
            return (Package)pkg;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1836
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1837
        return (Package)packages.compute(name, (n, p) -> toPackage(n, p, m));
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1838
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1839
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1840
    /*
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1841
     * Returns a Package object for the named package
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1842
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1843
    private Package toPackage(String name, NamedPackage p, Module m) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1844
        // define Package object if the named package is not yet defined
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1845
        if (p == null)
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1846
            return NamedPackage.toPackage(name, m);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1847
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1848
        // otherwise, replace the NamedPackage object with Package object
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1849
        if (p instanceof Package)
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1850
            return (Package)p;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1851
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1852
        return NamedPackage.toPackage(p.packageName(), p.module());
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1853
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1854
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1855
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1856
     * Defines a package by <a href="#name">name</a> in this {@code ClassLoader}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1857
     * <p>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1858
     * <a href="#name">Package names</a> must be unique within a class loader and
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1859
     * cannot be redefined or changed once created.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1860
     * <p>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1861
     * If a class loader wishes to define a package with specific properties,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1862
     * such as version information, then the class loader should call this
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1863
     * {@code definePackage} method before calling {@code defineClass}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1864
     * Otherwise, the
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1865
     * {@link #defineClass(String, byte[], int, int, ProtectionDomain) defineClass}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1866
     * method will define a package in this class loader corresponding to the package
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1867
     * of the newly defined class; the properties of this defined package are
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1868
     * specified by {@link Package}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1869
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1870
     * @apiNote
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1871
     * A class loader that wishes to define a package for classes in a JAR
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1872
     * typically uses the specification and implementation titles, versions, and
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1873
     * vendors from the JAR's manifest. If the package is specified as
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1874
     * {@linkplain java.util.jar.Attributes.Name#SEALED sealed} in the JAR's manifest,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1875
     * the {@code URL} of the JAR file is typically used as the {@code sealBase}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1876
     * If classes of package {@code 'p'} defined by this class loader
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1877
     * are loaded from multiple JARs, the {@code Package} object may contain
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1878
     * different information depending on the first class of package {@code 'p'}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1879
     * defined and which JAR's manifest is read first to explicitly define
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1880
     * package {@code 'p'}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1881
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1882
     * <p> It is strongly recommended that a class loader does not call this
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1883
     * method to explicitly define packages in <em>named modules</em>; instead,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1884
     * the package will be automatically defined when a class is {@linkplain
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1885
     * #defineClass(String, byte[], int, int, ProtectionDomain) being defined}.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1886
     * If it is desirable to define {@code Package} explicitly, it should ensure
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1887
     * that all packages in a named module are defined with the properties
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1888
     * specified by {@link Package}.  Otherwise, some {@code Package} objects
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1889
     * in a named module may be for example sealed with different seal base.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1890
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1891
     * @param  name
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1892
     *         The <a href="#name">package name</a>
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1893
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1894
     * @param  specTitle
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1895
     *         The specification title
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1896
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1897
     * @param  specVersion
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1898
     *         The specification version
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1899
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1900
     * @param  specVendor
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1901
     *         The specification vendor
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1902
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1903
     * @param  implTitle
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1904
     *         The implementation title
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1905
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1906
     * @param  implVersion
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1907
     *         The implementation version
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1908
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1909
     * @param  implVendor
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1910
     *         The implementation vendor
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1911
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1912
     * @param  sealBase
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1913
     *         If not {@code null}, then this package is sealed with
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1914
     *         respect to the given code source {@link java.net.URL URL}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1915
     *         object.  Otherwise, the package is not sealed.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1916
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1917
     * @return  The newly defined {@code Package} object
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1918
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1919
     * @throws  NullPointerException
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1920
     *          if {@code name} is {@code null}.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1921
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1922
     * @throws  IllegalArgumentException
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1923
     *          if a package of the given {@code name} is already
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1924
     *          defined by this class loader
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1925
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1926
     * @since  1.2
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1927
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1928
     * @see <a href="../../../technotes/guides/jar/jar.html#versioning">
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1929
     *      The JAR File Specification: Package Versioning</a>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1930
     * @see <a href="../../../technotes/guides/jar/jar.html#sealing">
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1931
     *      The JAR File Specification: Package Sealing</a>
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1932
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1933
    protected Package definePackage(String name, String specTitle,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1934
                                    String specVersion, String specVendor,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1935
                                    String implTitle, String implVersion,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1936
                                    String implVendor, URL sealBase)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1937
    {
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1938
        Objects.requireNonNull(name);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1939
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1940
        // definePackage is not final and may be overridden by custom class loader
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1941
        Package p = new Package(name, specTitle, specVersion, specVendor,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1942
                                implTitle, implVersion, implVendor,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1943
                                sealBase, this);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1944
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1945
        if (packages.putIfAbsent(name, p) != null)
27348
1614e0fd2b9b 8060130: Simplify the synchronization of defining and getting java.lang.Package
redestad
parents: 27184
diff changeset
  1946
            throw new IllegalArgumentException(name);
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1947
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1948
        return p;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1949
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1950
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1951
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1952
     * Returns a {@code Package} of the given <a href="#name">name</a> that has been
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1953
     * defined by this class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1954
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1955
     * @param  name The <a href="#name">package name</a>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1956
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1957
     * @return The {@code Package} of the given name defined by this class loader,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1958
     *         or {@code null} if not found
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1959
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1960
     * @since  9
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1961
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1962
    public final Package getDefinedPackage(String name) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1963
        NamedPackage p = packages.get(name);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1964
        if (p == null)
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1965
            return null;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1966
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1967
        return definePackage(name, p.module());
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1968
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1969
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1970
    /**
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1971
     * Returns all of the {@code Package}s defined by this class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1972
     * The returned array has no duplicated {@code Package}s of the same name.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1973
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1974
     * @apiNote This method returns an array rather than a {@code Set} or {@code Stream}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1975
     *          for consistency with the existing {@link #getPackages} method.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1976
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1977
     * @return The array of {@code Package} objects defined by this class loader;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1978
     *         or an zero length array if no package has been defined by this class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1979
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1980
     * @since  9
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1981
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1982
    public final Package[] getDefinedPackages() {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1983
        return packages().toArray(Package[]::new);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1984
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1985
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1986
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1987
     * Finds a package by <a href="#name">name</a> in this class loader and its ancestors.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1988
     * <p>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1989
     * If this class loader defines a {@code Package} of the given name,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1990
     * the {@code Package} is returned. Otherwise, the ancestors of
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1991
     * this class loader are searched recursively (parent by parent)
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1992
     * for a {@code Package} of the given name.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1993
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1994
     * @param  name
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1995
     *         The <a href="#name">package name</a>
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1996
     *
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1997
     * @return The {@code Package} corresponding to the given name defined by
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  1998
     *         this class loader or its ancestors, or {@code null} if not found.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  1999
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2000
     * @deprecated
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2001
     * If multiple class loaders delegate to each other and define classes
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2002
     * with the same package name, and one such loader relies on the lookup
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2003
     * behavior of {@code getPackage} to return a {@code Package} from
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2004
     * a parent loader, then the properties exposed by the {@code Package}
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2005
     * may not be as expected in the rest of the program.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2006
     * For example, the {@code Package} will only expose annotations from the
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2007
     * {@code package-info.class} file defined by the parent loader, even if
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2008
     * annotations exist in a {@code package-info.class} file defined by
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2009
     * a child loader.  A more robust approach is to use the
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2010
     * {@link ClassLoader#getDefinedPackage} method which returns
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2011
     * a {@code Package} for the specified class loader.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2012
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2013
     * @since  1.2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2014
     */
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2015
    @Deprecated
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2016
    protected Package getPackage(String name) {
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2017
        Package pkg = getDefinedPackage(name);
8789
23f273e43be9 7001933: Deadlock in java.lang.classloader.getPackage()
valeriep
parents: 8552
diff changeset
  2018
        if (pkg == null) {
23f273e43be9 7001933: Deadlock in java.lang.classloader.getPackage()
valeriep
parents: 8552
diff changeset
  2019
            if (parent != null) {
23f273e43be9 7001933: Deadlock in java.lang.classloader.getPackage()
valeriep
parents: 8552
diff changeset
  2020
                pkg = parent.getPackage(name);
23f273e43be9 7001933: Deadlock in java.lang.classloader.getPackage()
valeriep
parents: 8552
diff changeset
  2021
            } else {
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2022
                pkg = BootLoader.getDefinedPackage(name);
8789
23f273e43be9 7001933: Deadlock in java.lang.classloader.getPackage()
valeriep
parents: 8552
diff changeset
  2023
            }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2024
        }
8789
23f273e43be9 7001933: Deadlock in java.lang.classloader.getPackage()
valeriep
parents: 8552
diff changeset
  2025
        return pkg;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2026
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2027
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2028
    /**
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2029
     * Returns all of the {@code Package}s defined by this class loader
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2030
     * and its ancestors.  The returned array may contain more than one
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2031
     * {@code Package} object of the same package name, each defined by
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2032
     * a different class loader in the class loader hierarchy.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2033
     *
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2034
     * @return  The array of {@code Package} objects defined by this
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2035
     *          class loader and its ancestors
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2036
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2037
     * @since  1.2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2038
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2039
    protected Package[] getPackages() {
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2040
        Stream<Package> pkgs = packages();
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2041
        ClassLoader ld = parent;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2042
        while (ld != null) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2043
            pkgs = Stream.concat(ld.packages(), pkgs);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2044
            ld = ld.parent;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2045
        }
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2046
        return Stream.concat(BootLoader.packages(), pkgs)
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2047
                     .toArray(Package[]::new);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2048
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2049
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2050
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2051
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2052
    // package-private
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2053
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2054
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2055
     * Returns a stream of Packages defined in this class loader
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2056
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2057
    Stream<Package> packages() {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2058
        return packages.values().stream()
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2059
                       .map(p -> definePackage(p.packageName(), p.module()));
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2060
    }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2061
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2062
    // -- Native library access --
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2063
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2064
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2065
     * Returns the absolute path name of a native library.  The VM invokes this
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2066
     * method to locate the native libraries that belong to classes loaded with
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2067
     * this class loader. If this method returns <tt>null</tt>, the VM
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2068
     * searches the library along the path specified as the
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  2069
     * "<tt>java.library.path</tt>" property.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2070
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2071
     * @param  libname
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2072
     *         The library name
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2073
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2074
     * @return  The absolute path of the native library
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2075
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2076
     * @see  System#loadLibrary(String)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2077
     * @see  System#mapLibraryName(String)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2078
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2079
     * @since  1.2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2080
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2081
    protected String findLibrary(String libname) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2082
        return null;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2083
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2084
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2085
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2086
     * The inner class NativeLibrary denotes a loaded native library instance.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2087
     * Every classloader contains a vector of loaded native libraries in the
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2088
     * private field <tt>nativeLibraries</tt>.  The native libraries loaded
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2089
     * into the system are entered into the <tt>systemNativeLibraries</tt>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2090
     * vector.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2091
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2092
     * <p> Every native library requires a particular version of JNI. This is
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2093
     * denoted by the private <tt>jniVersion</tt> field.  This field is set by
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2094
     * the VM when it loads the library, and used by the VM to pass the correct
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2095
     * version of JNI to the native methods.  </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2096
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2097
     * @see      ClassLoader
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2098
     * @since    1.2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2099
     */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2100
    static class NativeLibrary {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2101
        // opaque handle to native library, used in native code.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2102
        long handle;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2103
        // the version of JNI environment the native library requires.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2104
        private int jniVersion;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2105
        // the class from which the library is loaded, also indicates
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2106
        // the loader this native library belongs.
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2107
        private final Class<?> fromClass;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2108
        // the canonicalized name of the native library.
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2109
        // or static library name
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2110
        String name;
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2111
        // Indicates if the native library is linked into the VM
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2112
        boolean isBuiltin;
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2113
        // Indicates if the native library is loaded
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2114
        boolean loaded;
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2115
        native void load(String name, boolean isBuiltin);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2116
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2117
        native long find(String name);
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2118
        native void unload(String name, boolean isBuiltin);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2119
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2120
        public NativeLibrary(Class<?> fromClass, String name, boolean isBuiltin) {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2121
            this.name = name;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2122
            this.fromClass = fromClass;
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2123
            this.isBuiltin = isBuiltin;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2124
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2125
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2126
        protected void finalize() {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2127
            synchronized (loadedLibraryNames) {
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2128
                if (fromClass.getClassLoader() != null && loaded) {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2129
                    /* remove the native library name */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2130
                    int size = loadedLibraryNames.size();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2131
                    for (int i = 0; i < size; i++) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2132
                        if (name.equals(loadedLibraryNames.elementAt(i))) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2133
                            loadedLibraryNames.removeElementAt(i);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2134
                            break;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2135
                        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2136
                    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2137
                    /* unload the library. */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2138
                    ClassLoader.nativeLibraryContext.push(this);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2139
                    try {
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2140
                        unload(name, isBuiltin);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2141
                    } finally {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2142
                        ClassLoader.nativeLibraryContext.pop();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2143
                    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2144
                }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2145
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2146
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2147
        // Invoked in the VM to determine the context class in
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2148
        // JNI_Load/JNI_Unload
11117
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
  2149
        static Class<?> getFromClass() {
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2150
            return ClassLoader.nativeLibraryContext.peek().fromClass;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2151
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2152
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2153
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2154
    // All native library names we've loaded.
7803
56bc97d69d93 6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents: 7029
diff changeset
  2155
    private static Vector<String> loadedLibraryNames = new Vector<>();
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2156
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2157
    // Native libraries belonging to system classes.
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2158
    private static Vector<NativeLibrary> systemNativeLibraries
7803
56bc97d69d93 6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents: 7029
diff changeset
  2159
        = new Vector<>();
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2160
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2161
    // Native libraries associated with the class loader.
7803
56bc97d69d93 6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents: 7029
diff changeset
  2162
    private Vector<NativeLibrary> nativeLibraries = new Vector<>();
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2163
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2164
    // native libraries being loaded/unloaded.
7803
56bc97d69d93 6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents: 7029
diff changeset
  2165
    private static Stack<NativeLibrary> nativeLibraryContext = new Stack<>();
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2166
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2167
    // The paths searched for libraries
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2168
    private static String usr_paths[];
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2169
    private static String sys_paths[];
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2170
28521
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2171
    private static String[] initializePath(String propName) {
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2172
        String ldPath = System.getProperty(propName, "");
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2173
        int ldLen = ldPath.length();
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2174
        char ps = File.pathSeparatorChar;
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2175
        int psCount = 0;
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2176
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2177
        if (ClassLoaderHelper.allowsQuotedPathElements &&
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2178
                ldPath.indexOf('\"') >= 0) {
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2179
            // First, remove quotes put around quoted parts of paths.
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2180
            // Second, use a quotation mark as a new path separator.
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2181
            // This will preserve any quoted old path separators.
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2182
            char[] buf = new char[ldLen];
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2183
            int bufLen = 0;
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2184
            for (int i = 0; i < ldLen; ++i) {
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2185
                char ch = ldPath.charAt(i);
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2186
                if (ch == '\"') {
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2187
                    while (++i < ldLen &&
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2188
                            (ch = ldPath.charAt(i)) != '\"') {
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2189
                        buf[bufLen++] = ch;
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2190
                    }
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2191
                } else {
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2192
                    if (ch == ps) {
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2193
                        psCount++;
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2194
                        ch = '\"';
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2195
                    }
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2196
                    buf[bufLen++] = ch;
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2197
                }
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2198
            }
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2199
            ldPath = new String(buf, 0, bufLen);
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2200
            ldLen = bufLen;
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2201
            ps = '\"';
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2202
        } else {
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2203
            for (int i = ldPath.indexOf(ps); i >= 0;
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2204
                    i = ldPath.indexOf(ps, i + 1)) {
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2205
                psCount++;
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2206
            }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2207
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2208
28521
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2209
        String[] paths = new String[psCount + 1];
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2210
        int pathStart = 0;
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2211
        for (int j = 0; j < psCount; ++j) {
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2212
            int pathEnd = ldPath.indexOf(ps, pathStart);
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2213
            paths[j] = (pathStart < pathEnd) ?
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2214
                    ldPath.substring(pathStart, pathEnd) : ".";
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2215
            pathStart = pathEnd + 1;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2216
        }
28521
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2217
        paths[psCount] = (pathStart < ldLen) ?
b86e910f3310 8067951: System.loadLibrary cannot find library when path contains quoted entry
igerasim
parents: 27348
diff changeset
  2218
                ldPath.substring(pathStart, ldLen) : ".";
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2219
        return paths;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2220
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2221
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2222
    // Invoked in the java.lang.Runtime class to implement load and loadLibrary.
11117
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
  2223
    static void loadLibrary(Class<?> fromClass, String name,
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2224
                            boolean isAbsolute) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2225
        ClassLoader loader =
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2226
            (fromClass == null) ? null : fromClass.getClassLoader();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2227
        if (sys_paths == null) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2228
            usr_paths = initializePath("java.library.path");
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2229
            sys_paths = initializePath("sun.boot.library.path");
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2230
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2231
        if (isAbsolute) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2232
            if (loadLibrary0(fromClass, new File(name))) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2233
                return;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2234
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2235
            throw new UnsatisfiedLinkError("Can't load library: " + name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2236
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2237
        if (loader != null) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2238
            String libfilename = loader.findLibrary(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2239
            if (libfilename != null) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2240
                File libfile = new File(libfilename);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2241
                if (!libfile.isAbsolute()) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2242
                    throw new UnsatisfiedLinkError(
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2243
    "ClassLoader.findLibrary failed to return an absolute path: " + libfilename);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2244
                }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2245
                if (loadLibrary0(fromClass, libfile)) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2246
                    return;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2247
                }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2248
                throw new UnsatisfiedLinkError("Can't load " + libfilename);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2249
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2250
        }
22581
e868cde95050 8032779: Update code in java.lang to use newer language features
psandoz
parents: 22571
diff changeset
  2251
        for (String sys_path : sys_paths) {
e868cde95050 8032779: Update code in java.lang to use newer language features
psandoz
parents: 22571
diff changeset
  2252
            File libfile = new File(sys_path, System.mapLibraryName(name));
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2253
            if (loadLibrary0(fromClass, libfile)) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2254
                return;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2255
            }
12298
6e0b65d86fde 7134701: [macosx] Support legacy native library names
michaelm
parents: 11275
diff changeset
  2256
            libfile = ClassLoaderHelper.mapAlternativeName(libfile);
6e0b65d86fde 7134701: [macosx] Support legacy native library names
michaelm
parents: 11275
diff changeset
  2257
            if (libfile != null && loadLibrary0(fromClass, libfile)) {
6e0b65d86fde 7134701: [macosx] Support legacy native library names
michaelm
parents: 11275
diff changeset
  2258
                return;
6e0b65d86fde 7134701: [macosx] Support legacy native library names
michaelm
parents: 11275
diff changeset
  2259
            }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2260
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2261
        if (loader != null) {
22581
e868cde95050 8032779: Update code in java.lang to use newer language features
psandoz
parents: 22571
diff changeset
  2262
            for (String usr_path : usr_paths) {
e868cde95050 8032779: Update code in java.lang to use newer language features
psandoz
parents: 22571
diff changeset
  2263
                File libfile = new File(usr_path, System.mapLibraryName(name));
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2264
                if (loadLibrary0(fromClass, libfile)) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2265
                    return;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2266
                }
12298
6e0b65d86fde 7134701: [macosx] Support legacy native library names
michaelm
parents: 11275
diff changeset
  2267
                libfile = ClassLoaderHelper.mapAlternativeName(libfile);
6e0b65d86fde 7134701: [macosx] Support legacy native library names
michaelm
parents: 11275
diff changeset
  2268
                if (libfile != null && loadLibrary0(fromClass, libfile)) {
6e0b65d86fde 7134701: [macosx] Support legacy native library names
michaelm
parents: 11275
diff changeset
  2269
                    return;
6e0b65d86fde 7134701: [macosx] Support legacy native library names
michaelm
parents: 11275
diff changeset
  2270
                }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2271
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2272
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2273
        // Oops, it failed
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2274
        throw new UnsatisfiedLinkError("no " + name + " in java.library.path");
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2275
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2276
31084
0acb07ceb0bc 8081674: EmptyStackException at startup if running with extended or unsupported charset
simonis
parents: 29986
diff changeset
  2277
    static native String findBuiltinLib(String name);
0acb07ceb0bc 8081674: EmptyStackException at startup if running with extended or unsupported charset
simonis
parents: 29986
diff changeset
  2278
11117
b6e68b1344d4 7116404: Miscellaneous warnings (java.rmi.**, serialization, some core classes)
alanb
parents: 9266
diff changeset
  2279
    private static boolean loadLibrary0(Class<?> fromClass, final File file) {
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2280
        // Check to see if we're attempting to access a static library
31084
0acb07ceb0bc 8081674: EmptyStackException at startup if running with extended or unsupported charset
simonis
parents: 29986
diff changeset
  2281
        String name = findBuiltinLib(file.getName());
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2282
        boolean isBuiltin = (name != null);
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2283
        if (!isBuiltin) {
25167
6a8e55aba124 8047904: Runtime.loadLibrary throws SecurityException when security manager is installed
mchung
parents: 24685
diff changeset
  2284
            name = AccessController.doPrivileged(
29986
97167d851fc4 8078467: Update core libraries to use diamond with anonymous classes
darcy
parents: 28544
diff changeset
  2285
                new PrivilegedAction<>() {
25167
6a8e55aba124 8047904: Runtime.loadLibrary throws SecurityException when security manager is installed
mchung
parents: 24685
diff changeset
  2286
                    public String run() {
6a8e55aba124 8047904: Runtime.loadLibrary throws SecurityException when security manager is installed
mchung
parents: 24685
diff changeset
  2287
                        try {
6a8e55aba124 8047904: Runtime.loadLibrary throws SecurityException when security manager is installed
mchung
parents: 24685
diff changeset
  2288
                            return file.exists() ? file.getCanonicalPath() : null;
6a8e55aba124 8047904: Runtime.loadLibrary throws SecurityException when security manager is installed
mchung
parents: 24685
diff changeset
  2289
                        } catch (IOException e) {
6a8e55aba124 8047904: Runtime.loadLibrary throws SecurityException when security manager is installed
mchung
parents: 24685
diff changeset
  2290
                            return null;
6a8e55aba124 8047904: Runtime.loadLibrary throws SecurityException when security manager is installed
mchung
parents: 24685
diff changeset
  2291
                        }
6a8e55aba124 8047904: Runtime.loadLibrary throws SecurityException when security manager is installed
mchung
parents: 24685
diff changeset
  2292
                    }
6a8e55aba124 8047904: Runtime.loadLibrary throws SecurityException when security manager is installed
mchung
parents: 24685
diff changeset
  2293
                });
6a8e55aba124 8047904: Runtime.loadLibrary throws SecurityException when security manager is installed
mchung
parents: 24685
diff changeset
  2294
            if (name == null) {
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2295
                return false;
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2296
            }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2297
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2298
        ClassLoader loader =
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2299
            (fromClass == null) ? null : fromClass.getClassLoader();
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2300
        Vector<NativeLibrary> libs =
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2301
            loader != null ? loader.nativeLibraries : systemNativeLibraries;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2302
        synchronized (libs) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2303
            int size = libs.size();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2304
            for (int i = 0; i < size; i++) {
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2305
                NativeLibrary lib = libs.elementAt(i);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2306
                if (name.equals(lib.name)) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2307
                    return true;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2308
                }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2309
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2310
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2311
            synchronized (loadedLibraryNames) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2312
                if (loadedLibraryNames.contains(name)) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2313
                    throw new UnsatisfiedLinkError
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2314
                        ("Native Library " +
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2315
                         name +
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2316
                         " already loaded in another classloader");
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2317
                }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2318
                /* If the library is being loaded (must be by the same thread,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2319
                 * because Runtime.load and Runtime.loadLibrary are
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2320
                 * synchronous). The reason is can occur is that the JNI_OnLoad
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2321
                 * function can cause another loadLibrary invocation.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2322
                 *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2323
                 * Thus we can use a static stack to hold the list of libraries
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2324
                 * we are loading.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2325
                 *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2326
                 * If there is a pending load operation for the library, we
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2327
                 * immediately return success; otherwise, we raise
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2328
                 * UnsatisfiedLinkError.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2329
                 */
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2330
                int n = nativeLibraryContext.size();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2331
                for (int i = 0; i < n; i++) {
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2332
                    NativeLibrary lib = nativeLibraryContext.elementAt(i);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2333
                    if (name.equals(lib.name)) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2334
                        if (loader == lib.fromClass.getClassLoader()) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2335
                            return true;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2336
                        } else {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2337
                            throw new UnsatisfiedLinkError
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2338
                                ("Native Library " +
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2339
                                 name +
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2340
                                 " is being loaded in another classloader");
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2341
                        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2342
                    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2343
                }
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2344
                NativeLibrary lib = new NativeLibrary(fromClass, name, isBuiltin);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2345
                nativeLibraryContext.push(lib);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2346
                try {
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2347
                    lib.load(name, isBuiltin);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2348
                } finally {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2349
                    nativeLibraryContext.pop();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2350
                }
16479
d845c18d13f2 8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
alanb
parents: 16063
diff changeset
  2351
                if (lib.loaded) {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2352
                    loadedLibraryNames.addElement(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2353
                    libs.addElement(lib);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2354
                    return true;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2355
                }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2356
                return false;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2357
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2358
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2359
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2360
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2361
    // Invoked in the VM class linking code.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2362
    static long findNative(ClassLoader loader, String name) {
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2363
        Vector<NativeLibrary> libs =
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2364
            loader != null ? loader.nativeLibraries : systemNativeLibraries;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2365
        synchronized (libs) {
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2366
            int size = libs.size();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2367
            for (int i = 0; i < size; i++) {
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2368
                NativeLibrary lib = libs.elementAt(i);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2369
                long entry = lib.find(name);
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2370
                if (entry != 0)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2371
                    return entry;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2372
            }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2373
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2374
        return 0;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2375
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2376
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2377
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2378
    // -- Assertion management --
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2379
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2380
    final Object assertionLock;
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2381
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2382
    // The default toggle for assertion checking.
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2383
    // @GuardedBy("assertionLock")
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2384
    private boolean defaultAssertionStatus = false;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2385
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2386
    // Maps String packageName to Boolean package default assertion status Note
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2387
    // that the default package is placed under a null map key.  If this field
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2388
    // is null then we are delegating assertion status queries to the VM, i.e.,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2389
    // none of this ClassLoader's assertion status modification methods have
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2390
    // been invoked.
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2391
    // @GuardedBy("assertionLock")
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2392
    private Map<String, Boolean> packageAssertionStatus = null;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2393
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2394
    // Maps String fullyQualifiedClassName to Boolean assertionStatus If this
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2395
    // field is null then we are delegating assertion status queries to the VM,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2396
    // i.e., none of this ClassLoader's assertion status modification methods
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2397
    // have been invoked.
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2398
    // @GuardedBy("assertionLock")
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2399
    Map<String, Boolean> classAssertionStatus = null;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2400
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2401
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2402
     * Sets the default assertion status for this class loader.  This setting
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2403
     * determines whether classes loaded by this class loader and initialized
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2404
     * in the future will have assertions enabled or disabled by default.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2405
     * This setting may be overridden on a per-package or per-class basis by
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2406
     * invoking {@link #setPackageAssertionStatus(String, boolean)} or {@link
18776
c17100862d86 8019862: Fix doclint errors in java.lang.*.
bpb
parents: 18156
diff changeset
  2407
     * #setClassAssertionStatus(String, boolean)}.
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2408
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2409
     * @param  enabled
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2410
     *         <tt>true</tt> if classes loaded by this class loader will
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2411
     *         henceforth have assertions enabled by default, <tt>false</tt>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2412
     *         if they will have assertions disabled by default.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2413
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2414
     * @since  1.4
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2415
     */
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2416
    public void setDefaultAssertionStatus(boolean enabled) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2417
        synchronized (assertionLock) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2418
            if (classAssertionStatus == null)
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2419
                initializeJavaAssertionMaps();
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2420
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2421
            defaultAssertionStatus = enabled;
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2422
        }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2423
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2424
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2425
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2426
     * Sets the package default assertion status for the named package.  The
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2427
     * package default assertion status determines the assertion status for
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2428
     * classes initialized in the future that belong to the named package or
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2429
     * any of its "subpackages".
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2430
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2431
     * <p> A subpackage of a package named p is any package whose name begins
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2432
     * with "<tt>p.</tt>".  For example, <tt>javax.swing.text</tt> is a
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2433
     * subpackage of <tt>javax.swing</tt>, and both <tt>java.util</tt> and
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2434
     * <tt>java.lang.reflect</tt> are subpackages of <tt>java</tt>.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2435
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2436
     * <p> In the event that multiple package defaults apply to a given class,
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2437
     * the package default pertaining to the most specific package takes
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2438
     * precedence over the others.  For example, if <tt>javax.lang</tt> and
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2439
     * <tt>javax.lang.reflect</tt> both have package defaults associated with
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2440
     * them, the latter package default applies to classes in
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2441
     * <tt>javax.lang.reflect</tt>.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2442
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2443
     * <p> Package defaults take precedence over the class loader's default
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2444
     * assertion status, and may be overridden on a per-class basis by invoking
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2445
     * {@link #setClassAssertionStatus(String, boolean)}.  </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2446
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2447
     * @param  packageName
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2448
     *         The name of the package whose package default assertion status
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2449
     *         is to be set. A <tt>null</tt> value indicates the unnamed
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2450
     *         package that is "current"
9266
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
  2451
     *         (see section 7.4.2 of
121fb370f179 7032960: API files in java.awt need to be updated for references to JVM Spec with editions/hyperlinks
jjh
parents: 8789
diff changeset
  2452
     *         <cite>The Java&trade; Language Specification</cite>.)
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2453
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2454
     * @param  enabled
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2455
     *         <tt>true</tt> if classes loaded by this classloader and
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2456
     *         belonging to the named package or any of its subpackages will
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2457
     *         have assertions enabled by default, <tt>false</tt> if they will
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2458
     *         have assertions disabled by default.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2459
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2460
     * @since  1.4
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2461
     */
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2462
    public void setPackageAssertionStatus(String packageName,
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2463
                                          boolean enabled) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2464
        synchronized (assertionLock) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2465
            if (packageAssertionStatus == null)
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2466
                initializeJavaAssertionMaps();
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2467
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2468
            packageAssertionStatus.put(packageName, enabled);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2469
        }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2470
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2471
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2472
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2473
     * Sets the desired assertion status for the named top-level class in this
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2474
     * class loader and any nested classes contained therein.  This setting
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2475
     * takes precedence over the class loader's default assertion status, and
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2476
     * over any applicable per-package default.  This method has no effect if
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2477
     * the named class has already been initialized.  (Once a class is
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2478
     * initialized, its assertion status cannot change.)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2479
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2480
     * <p> If the named class is not a top-level class, this invocation will
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2481
     * have no effect on the actual assertion status of any class. </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2482
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2483
     * @param  className
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2484
     *         The fully qualified class name of the top-level class whose
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2485
     *         assertion status is to be set.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2486
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2487
     * @param  enabled
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2488
     *         <tt>true</tt> if the named class is to have assertions
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2489
     *         enabled when (and if) it is initialized, <tt>false</tt> if the
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2490
     *         class is to have assertions disabled.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2491
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2492
     * @since  1.4
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2493
     */
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2494
    public void setClassAssertionStatus(String className, boolean enabled) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2495
        synchronized (assertionLock) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2496
            if (classAssertionStatus == null)
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2497
                initializeJavaAssertionMaps();
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2498
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2499
            classAssertionStatus.put(className, enabled);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2500
        }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2501
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2502
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2503
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2504
     * Sets the default assertion status for this class loader to
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2505
     * <tt>false</tt> and discards any package defaults or class assertion
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2506
     * status settings associated with the class loader.  This method is
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2507
     * provided so that class loaders can be made to ignore any command line or
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2508
     * persistent assertion status settings and "start with a clean slate."
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2509
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2510
     * @since  1.4
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2511
     */
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2512
    public void clearAssertionStatus() {
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2513
        /*
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2514
         * Whether or not "Java assertion maps" are initialized, set
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2515
         * them to empty maps, effectively ignoring any present settings.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2516
         */
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2517
        synchronized (assertionLock) {
7803
56bc97d69d93 6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents: 7029
diff changeset
  2518
            classAssertionStatus = new HashMap<>();
56bc97d69d93 6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents: 7029
diff changeset
  2519
            packageAssertionStatus = new HashMap<>();
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2520
            defaultAssertionStatus = false;
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2521
        }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2522
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2523
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2524
    /**
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2525
     * Returns the assertion status that would be assigned to the specified
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2526
     * class if it were to be initialized at the time this method is invoked.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2527
     * If the named class has had its assertion status set, the most recent
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2528
     * setting will be returned; otherwise, if any package default assertion
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2529
     * status pertains to this class, the most recent setting for the most
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2530
     * specific pertinent package default assertion status is returned;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2531
     * otherwise, this class loader's default assertion status is returned.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2532
     * </p>
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2533
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2534
     * @param  className
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2535
     *         The fully qualified class name of the class whose desired
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2536
     *         assertion status is being queried.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2537
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2538
     * @return  The desired assertion status of the specified class.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2539
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2540
     * @see  #setClassAssertionStatus(String, boolean)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2541
     * @see  #setPackageAssertionStatus(String, boolean)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2542
     * @see  #setDefaultAssertionStatus(boolean)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2543
     *
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2544
     * @since  1.4
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2545
     */
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2546
    boolean desiredAssertionStatus(String className) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2547
        synchronized (assertionLock) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2548
            // assert classAssertionStatus   != null;
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2549
            // assert packageAssertionStatus != null;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2550
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2551
            // Check for a class entry
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2552
            Boolean result = classAssertionStatus.get(className);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2553
            if (result != null)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2554
                return result.booleanValue();
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2555
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2556
            // Check for most specific package entry
24685
215fa91e1b4c 8044461: Cleanup new Boolean and single character strings
rriggs
parents: 22581
diff changeset
  2557
            int dotIndex = className.lastIndexOf('.');
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2558
            if (dotIndex < 0) { // default package
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2559
                result = packageAssertionStatus.get(null);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2560
                if (result != null)
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2561
                    return result.booleanValue();
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2562
            }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2563
            while(dotIndex > 0) {
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2564
                className = className.substring(0, dotIndex);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2565
                result = packageAssertionStatus.get(className);
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2566
                if (result != null)
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2567
                    return result.booleanValue();
24685
215fa91e1b4c 8044461: Cleanup new Boolean and single character strings
rriggs
parents: 22581
diff changeset
  2568
                dotIndex = className.lastIndexOf('.', dotIndex-1);
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2569
            }
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2570
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2571
            // Return the classloader default
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2572
            return defaultAssertionStatus;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2573
        }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2574
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2575
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2576
    // Set up the assertions with information provided by the VM.
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2577
    // Note: Should only be called inside a synchronized block
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2578
    private void initializeJavaAssertionMaps() {
2448
1e8128f3ff61 4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents: 715
diff changeset
  2579
        // assert Thread.holdsLock(assertionLock);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2580
7803
56bc97d69d93 6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents: 7029
diff changeset
  2581
        classAssertionStatus = new HashMap<>();
56bc97d69d93 6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents: 7029
diff changeset
  2582
        packageAssertionStatus = new HashMap<>();
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2583
        AssertionStatusDirectives directives = retrieveDirectives();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2584
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2585
        for(int i = 0; i < directives.classes.length; i++)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2586
            classAssertionStatus.put(directives.classes[i],
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2587
                                     directives.classEnabled[i]);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2588
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2589
        for(int i = 0; i < directives.packages.length; i++)
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2590
            packageAssertionStatus.put(directives.packages[i],
51
6fe31bc95bbc 6600143: Remove another 450 unnecessary casts
martin
parents: 2
diff changeset
  2591
                                       directives.packageEnabled[i]);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2592
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2593
        defaultAssertionStatus = directives.deflt;
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2594
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2595
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2596
    // Retrieves the assertion directives from the VM.
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2597
    private static native AssertionStatusDirectives retrieveDirectives();
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2598
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2599
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2600
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2601
     * Returns the ServiceCatalog for modules defined to this class loader
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2602
     * or {@code null} if this class loader does not have a services catalog.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2603
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2604
    ServicesCatalog getServicesCatalog() {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2605
        return servicesCatalog;
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2606
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2607
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2608
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2609
     * Returns the ServiceCatalog for modules defined to this class loader,
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2610
     * creating it if it doesn't already exist.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2611
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2612
    ServicesCatalog createOrGetServicesCatalog() {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2613
        ServicesCatalog catalog = servicesCatalog;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2614
        if (catalog == null) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2615
            catalog = new ServicesCatalog();
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2616
            boolean set = trySetObjectField("servicesCatalog", catalog);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2617
            if (!set) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2618
                // beaten by someone else
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2619
                catalog = servicesCatalog;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2620
            }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2621
        }
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2622
        return catalog;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2623
    }
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2624
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2625
    // the ServiceCatalog for modules associated with this class loader.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2626
    private volatile ServicesCatalog servicesCatalog;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2627
36972
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2628
    /**
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2629
     * Returns the ConcurrentHashMap used as a storage for ClassLoaderValue(s)
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2630
     * associated with this ClassLoader, creating it if it doesn't already exist.
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2631
     */
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2632
    ConcurrentHashMap<?, ?> createOrGetClassLoaderValueMap() {
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2633
        ConcurrentHashMap<?, ?> map = classLoaderValueMap;
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2634
        if (map == null) {
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2635
            map = new ConcurrentHashMap<>();
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2636
            boolean set = trySetObjectField("classLoaderValueMap", map);
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2637
            if (!set) {
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2638
                // beaten by someone else
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2639
                map = classLoaderValueMap;
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2640
            }
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2641
        }
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2642
        return map;
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2643
    }
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2644
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2645
    // the storage for ClassLoaderValue(s) associated with this ClassLoader
27147cde3256 8152115: (proxy) Examine performance of dynamic proxy creation
plevart
parents: 36511
diff changeset
  2646
    private volatile ConcurrentHashMap<?, ?> classLoaderValueMap;
36511
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2647
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2648
    /**
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2649
     * Attempts to atomically set a volatile field in this object. Returns
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2650
     * {@code true} if not beaten by another thread. Avoids the use of
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2651
     * AtomicReferenceFieldUpdater in this class.
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2652
     */
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2653
    private boolean trySetObjectField(String name, Object obj) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2654
        Unsafe unsafe = Unsafe.getUnsafe();
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2655
        Class<?> k = ClassLoader.class;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2656
        long offset;
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2657
        try {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2658
            Field f = k.getDeclaredField(name);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2659
            offset = unsafe.objectFieldOffset(f);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2660
        } catch (NoSuchFieldException e) {
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2661
            throw new InternalError(e);
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2662
        }
9d0388c6b336 8142968: Module System implementation
alanb
parents: 34953
diff changeset
  2663
        return unsafe.compareAndSwapObject(this, offset, null, obj);
2
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2664
    }
90ce3da70b43 Initial load
duke
parents:
diff changeset
  2665
}
34825
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2666
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2667
/*
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2668
 * A utility class that will enumerate over an array of enumerations.
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2669
 */
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2670
final class CompoundEnumeration<E> implements Enumeration<E> {
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2671
    private final Enumeration<E>[] enums;
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2672
    private int index;
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2673
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2674
    public CompoundEnumeration(Enumeration<E>[] enums) {
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2675
        this.enums = enums;
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2676
    }
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2677
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2678
    private boolean next() {
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2679
        while (index < enums.length) {
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2680
            if (enums[index] != null && enums[index].hasMoreElements()) {
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2681
                return true;
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2682
            }
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2683
            index++;
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2684
        }
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2685
        return false;
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2686
    }
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2687
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2688
    public boolean hasMoreElements() {
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2689
        return next();
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2690
    }
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2691
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2692
    public E nextElement() {
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2693
        if (!next()) {
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2694
            throw new NoSuchElementException();
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2695
        }
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2696
        return enums[index].nextElement();
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2697
    }
d315dac0f1a8 8146000: Remove sun.mics.CompoundEnumeration
chegar
parents: 32649
diff changeset
  2698
}