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/*
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* Copyright (c) 2014, 2017, 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.IOException;
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import java.io.InputStream;
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import java.lang.annotation.Annotation;
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import java.lang.module.Configuration;
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import java.lang.module.ModuleReference;
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import java.lang.module.ModuleDescriptor;
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import java.lang.module.ModuleDescriptor.Exports;
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import java.lang.module.ModuleDescriptor.Opens;
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import java.lang.module.ModuleDescriptor.Version;
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import java.lang.module.ResolvedModule;
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import java.lang.reflect.AnnotatedElement;
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import java.net.URI;
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import java.net.URL;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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import java.util.Optional;
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import java.util.Set;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.function.Function;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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import jdk.internal.loader.BuiltinClassLoader;
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import jdk.internal.loader.BootLoader;
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import jdk.internal.misc.JavaLangAccess;
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import jdk.internal.misc.SharedSecrets;
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import jdk.internal.module.ServicesCatalog;
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import jdk.internal.module.Resources;
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import jdk.internal.org.objectweb.asm.AnnotationVisitor;
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import jdk.internal.org.objectweb.asm.Attribute;
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import jdk.internal.org.objectweb.asm.ClassReader;
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import jdk.internal.org.objectweb.asm.ClassVisitor;
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import jdk.internal.org.objectweb.asm.ClassWriter;
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import jdk.internal.org.objectweb.asm.Opcodes;
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import jdk.internal.reflect.CallerSensitive;
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import jdk.internal.reflect.Reflection;
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import sun.security.util.SecurityConstants;
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/**
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* Represents a run-time module, either {@link #isNamed() named} or unnamed.
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*
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* <p> Named modules have a {@link #getName() name} and are constructed by the
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* Java Virtual Machine when a graph of modules is defined to the Java virtual
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* machine to create a {@linkplain ModuleLayer module layer}. </p>
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*
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* <p> An unnamed module does not have a name. There is an unnamed module for
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* each {@link ClassLoader ClassLoader}, obtained by invoking its {@link
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* ClassLoader#getUnnamedModule() getUnnamedModule} method. All types that are
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* not in a named module are members of their defining class loader's unnamed
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* module. </p>
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*
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* <p> The package names that are parameters or returned by methods defined in
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* this class are the fully-qualified names of the packages as defined in
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* section 6.5.3 of <cite>The Java™ Language Specification</cite>, for
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* example, {@code "java.lang"}. </p>
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*
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* <p> Unless otherwise specified, passing a {@code null} argument to a method
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* in this class causes a {@link NullPointerException NullPointerException} to
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* be thrown. </p>
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*
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* @since 9
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* @spec JPMS
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* @see Class#getModule()
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*/
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public final class Module implements AnnotatedElement {
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// the layer that contains this module, can be null
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private final ModuleLayer layer;
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// module name and loader, these fields are read by VM
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private final String name;
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private final ClassLoader loader;
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// the module descriptor
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private final ModuleDescriptor descriptor;
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/**
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* Creates a new named Module. The resulting Module will be defined to the
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* VM but will not read any other modules, will not have any exports setup
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* and will not be registered in the service catalog.
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*/
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Module(ModuleLayer layer,
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ClassLoader loader,
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ModuleDescriptor descriptor,
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URI uri)
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{
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this.layer = layer;
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this.name = descriptor.name();
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this.loader = loader;
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this.descriptor = descriptor;
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// define module to VM
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boolean isOpen = descriptor.isOpen();
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Version version = descriptor.version().orElse(null);
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String vs = Objects.toString(version, null);
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String loc = Objects.toString(uri, null);
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String[] packages = descriptor.packages().toArray(new String[0]);
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defineModule0(this, isOpen, vs, loc, packages);
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}
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/**
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* Create the unnamed Module for the given ClassLoader.
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*
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* @see ClassLoader#getUnnamedModule
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*/
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Module(ClassLoader loader) {
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this.layer = null;
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this.name = null;
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this.loader = loader;
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this.descriptor = null;
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}
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/**
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* Creates a named module but without defining the module to the VM.
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*
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* @apiNote This constructor is for VM white-box testing.
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*/
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Module(ClassLoader loader, ModuleDescriptor descriptor) {
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this.layer = null;
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this.name = descriptor.name();
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this.loader = loader;
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this.descriptor = descriptor;
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}
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/**
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* Returns {@code true} if this module is a named module.
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*
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* @return {@code true} if this is a named module
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*
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* @see ClassLoader#getUnnamedModule()
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*/
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public boolean isNamed() {
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return name != null;
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}
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/**
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* Returns the module name or {@code null} if this module is an unnamed
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* module.
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*
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* @return The module name
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*/
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public String getName() {
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return name;
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}
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/**
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* Returns the {@code ClassLoader} for this module.
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*
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* <p> If there is a security manager then its {@code checkPermission}
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* method if first called with a {@code RuntimePermission("getClassLoader")}
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* permission to check that the caller is allowed to get access to the
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* class loader. </p>
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*
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* @return The class loader for this module
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*
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* @throws SecurityException
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* If denied by the security manager
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*/
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public ClassLoader getClassLoader() {
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SecurityManager sm = System.getSecurityManager();
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if (sm != null) {
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sm.checkPermission(SecurityConstants.GET_CLASSLOADER_PERMISSION);
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}
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return loader;
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}
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/**
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* Returns the module descriptor for this module or {@code null} if this
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* module is an unnamed module.
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*
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* @return The module descriptor for this module
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*/
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public ModuleDescriptor getDescriptor() {
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return descriptor;
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}
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/**
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* Returns the layer that contains this module or {@code null} if this
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* module is not in a layer.
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*
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* A module layer contains named modules and therefore this method always
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* returns {@code null} when invoked on an unnamed module.
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*
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* <p> <a href="reflect/Proxy.html#dynamicmodule">Dynamic modules</a> are
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* named modules that are generated at runtime. A dynamic module may or may
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* not be in a module layer. </p>
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*
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* @return The module layer that contains this module
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*
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* @see java.lang.reflect.Proxy
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*/
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public ModuleLayer getLayer() {
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if (isNamed()) {
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ModuleLayer layer = this.layer;
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if (layer != null)
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return layer;
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// special-case java.base as it is created before the boot layer
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if (loader == null && name.equals("java.base")) {
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return ModuleLayer.boot();
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}
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}
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return null;
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}
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// --
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// special Module to mean "all unnamed modules"
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private static final Module ALL_UNNAMED_MODULE = new Module(null);
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// special Module to mean "everyone"
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private static final Module EVERYONE_MODULE = new Module(null);
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// set contains EVERYONE_MODULE, used when a package is opened or
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// exported unconditionally
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private static final Set<Module> EVERYONE_SET = Set.of(EVERYONE_MODULE);
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// -- readability --
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// the modules that this module reads
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private volatile Set<Module> reads;
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// additional module (2nd key) that some module (1st key) reflectively reads
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private static final WeakPairMap<Module, Module, Boolean> reflectivelyReads
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= new WeakPairMap<>();
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/**
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* Indicates if this module reads the given module. This method returns
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* {@code true} if invoked to test if this module reads itself. It also
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* returns {@code true} if invoked on an unnamed module (as unnamed
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* modules read all modules).
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*
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* @param other
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* The other module
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*
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* @return {@code true} if this module reads {@code other}
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*
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* @see #addReads(Module)
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*/
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public boolean canRead(Module other) {
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Objects.requireNonNull(other);
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// an unnamed module reads all modules
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if (!this.isNamed())
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return true;
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// all modules read themselves
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if (other == this)
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return true;
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// check if this module reads other
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if (other.isNamed()) {
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Set<Module> reads = this.reads; // volatile read
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if (reads != null && reads.contains(other))
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return true;
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}
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// check if this module reads the other module reflectively
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if (reflectivelyReads.containsKeyPair(this, other))
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return true;
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// if other is an unnamed module then check if this module reads
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// all unnamed modules
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if (!other.isNamed()
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&& reflectivelyReads.containsKeyPair(this, ALL_UNNAMED_MODULE))
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return true;
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return false;
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}
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/**
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* If the caller's module is this module then update this module to read
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* the given module.
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*
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* This method is a no-op if {@code other} is this module (all modules read
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* themselves), this module is an unnamed module (as unnamed modules read
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* all modules), or this module already reads {@code other}.
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*
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* @implNote <em>Read edges</em> added by this method are <em>weak</em> and
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* do not prevent {@code other} from being GC'ed when this module is
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* strongly reachable.
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*
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* @param other
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* The other module
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*
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* @return this module
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*
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* @throws IllegalCallerException
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* If this is a named module and the caller's module is not this
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* module
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*
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* @see #canRead
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*/
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@CallerSensitive
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public Module addReads(Module other) {
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Objects.requireNonNull(other);
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if (this.isNamed()) {
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Module caller = getCallerModule(Reflection.getCallerClass());
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if (caller != this) {
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throw new IllegalCallerException(caller + " != " + this);
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}
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implAddReads(other, true);
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}
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return this;
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}
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/**
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* Updates this module to read another module.
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*
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* @apiNote Used by the --add-reads command line option.
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*/
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void implAddReads(Module other) {
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implAddReads(other, true);
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}
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/**
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* Updates this module to read all unnamed modules.
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*
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* @apiNote Used by the --add-reads command line option.
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*/
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void implAddReadsAllUnnamed() {
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implAddReads(Module.ALL_UNNAMED_MODULE, true);
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}
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/**
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* Updates this module to read another module without notifying the VM.
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*
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* @apiNote This method is for VM white-box testing.
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*/
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void implAddReadsNoSync(Module other) {
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implAddReads(other, false);
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}
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/**
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* Makes the given {@code Module} readable to this module.
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*
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* If {@code syncVM} is {@code true} then the VM is notified.
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*/
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private void implAddReads(Module other, boolean syncVM) {
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Objects.requireNonNull(other);
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if (!canRead(other)) {
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// update VM first, just in case it fails
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if (syncVM) {
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if (other == ALL_UNNAMED_MODULE) {
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addReads0(this, null);
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} else {
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addReads0(this, other);
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}
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}
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// add reflective read
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reflectivelyReads.putIfAbsent(this, other, Boolean.TRUE);
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}
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}
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// -- exported and open packages --
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// the packages are open to other modules, can be null
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// if the value contains EVERYONE_MODULE then the package is open to all
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private volatile Map<String, Set<Module>> openPackages;
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// the packages that are exported, can be null
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// if the value contains EVERYONE_MODULE then the package is exported to all
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private volatile Map<String, Set<Module>> exportedPackages;
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// additional exports or opens added at run-time
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// this module (1st key), other module (2nd key)
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// (package name, open?) (value)
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private static final WeakPairMap<Module, Module, Map<String, Boolean>>
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reflectivelyExports = new WeakPairMap<>();
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/**
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* Returns {@code true} if this module exports the given package to at
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* least the given module.
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*
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* <p> This method returns {@code true} if invoked to test if a package in
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* this module is exported to itself. It always returns {@code true} when
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* invoked on an unnamed module. A package that is {@link #isOpen open} to
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* the given module is considered exported to that module at run-time and
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* so this method returns {@code true} if the package is open to the given
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* module. </p>
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*
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* <p> This method does not check if the given module reads this module. </p>
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*
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* @param pn
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* The package name
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* @param other
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433 |
* The other module
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|
434 |
*
|
|
435 |
* @return {@code true} if this module exports the package to at least the
|
|
436 |
* given module
|
|
437 |
*
|
|
438 |
* @see ModuleDescriptor#exports()
|
|
439 |
* @see #addExports(String,Module)
|
|
440 |
*/
|
|
441 |
public boolean isExported(String pn, Module other) {
|
|
442 |
Objects.requireNonNull(pn);
|
|
443 |
Objects.requireNonNull(other);
|
|
444 |
return implIsExportedOrOpen(pn, other, /*open*/false);
|
|
445 |
}
|
|
446 |
|
|
447 |
/**
|
|
448 |
* Returns {@code true} if this module has <em>opened</em> a package to at
|
|
449 |
* least the given module.
|
|
450 |
*
|
|
451 |
* <p> This method returns {@code true} if invoked to test if a package in
|
|
452 |
* this module is open to itself. It returns {@code true} when invoked on an
|
|
453 |
* {@link ModuleDescriptor#isOpen open} module with a package in the module.
|
|
454 |
* It always returns {@code true} when invoked on an unnamed module. </p>
|
|
455 |
*
|
|
456 |
* <p> This method does not check if the given module reads this module. </p>
|
|
457 |
*
|
|
458 |
* @param pn
|
|
459 |
* The package name
|
|
460 |
* @param other
|
|
461 |
* The other module
|
|
462 |
*
|
|
463 |
* @return {@code true} if this module has <em>opened</em> the package
|
|
464 |
* to at least the given module
|
|
465 |
*
|
|
466 |
* @see ModuleDescriptor#opens()
|
|
467 |
* @see #addOpens(String,Module)
|
|
468 |
* @see AccessibleObject#setAccessible(boolean)
|
|
469 |
* @see java.lang.invoke.MethodHandles#privateLookupIn
|
|
470 |
*/
|
|
471 |
public boolean isOpen(String pn, Module other) {
|
|
472 |
Objects.requireNonNull(pn);
|
|
473 |
Objects.requireNonNull(other);
|
|
474 |
return implIsExportedOrOpen(pn, other, /*open*/true);
|
|
475 |
}
|
|
476 |
|
|
477 |
/**
|
|
478 |
* Returns {@code true} if this module exports the given package
|
|
479 |
* unconditionally.
|
|
480 |
*
|
|
481 |
* <p> This method always returns {@code true} when invoked on an unnamed
|
|
482 |
* module. A package that is {@link #isOpen(String) opened} unconditionally
|
|
483 |
* is considered exported unconditionally at run-time and so this method
|
|
484 |
* returns {@code true} if the package is opened unconditionally. </p>
|
|
485 |
*
|
|
486 |
* <p> This method does not check if the given module reads this module. </p>
|
|
487 |
*
|
|
488 |
* @param pn
|
|
489 |
* The package name
|
|
490 |
*
|
|
491 |
* @return {@code true} if this module exports the package unconditionally
|
|
492 |
*
|
|
493 |
* @see ModuleDescriptor#exports()
|
|
494 |
*/
|
|
495 |
public boolean isExported(String pn) {
|
|
496 |
Objects.requireNonNull(pn);
|
|
497 |
return implIsExportedOrOpen(pn, EVERYONE_MODULE, /*open*/false);
|
|
498 |
}
|
|
499 |
|
|
500 |
/**
|
|
501 |
* Returns {@code true} if this module has <em>opened</em> a package
|
|
502 |
* unconditionally.
|
|
503 |
*
|
|
504 |
* <p> This method always returns {@code true} when invoked on an unnamed
|
|
505 |
* module. Additionally, it always returns {@code true} when invoked on an
|
|
506 |
* {@link ModuleDescriptor#isOpen open} module with a package in the
|
|
507 |
* module. </p>
|
|
508 |
*
|
|
509 |
* <p> This method does not check if the given module reads this module. </p>
|
|
510 |
*
|
|
511 |
* @param pn
|
|
512 |
* The package name
|
|
513 |
*
|
|
514 |
* @return {@code true} if this module has <em>opened</em> the package
|
|
515 |
* unconditionally
|
|
516 |
*
|
|
517 |
* @see ModuleDescriptor#opens()
|
|
518 |
*/
|
|
519 |
public boolean isOpen(String pn) {
|
|
520 |
Objects.requireNonNull(pn);
|
|
521 |
return implIsExportedOrOpen(pn, EVERYONE_MODULE, /*open*/true);
|
|
522 |
}
|
|
523 |
|
|
524 |
|
|
525 |
/**
|
|
526 |
* Returns {@code true} if this module exports or opens the given package
|
|
527 |
* to the given module. If the other module is {@code EVERYONE_MODULE} then
|
|
528 |
* this method tests if the package is exported or opened unconditionally.
|
|
529 |
*/
|
|
530 |
private boolean implIsExportedOrOpen(String pn, Module other, boolean open) {
|
|
531 |
// all packages in unnamed modules are open
|
|
532 |
if (!isNamed())
|
|
533 |
return true;
|
|
534 |
|
|
535 |
// all packages are exported/open to self
|
|
536 |
if (other == this && containsPackage(pn))
|
|
537 |
return true;
|
|
538 |
|
|
539 |
// all packages in open and automatic modules are open
|
|
540 |
if (descriptor.isOpen() || descriptor.isAutomatic())
|
|
541 |
return containsPackage(pn);
|
|
542 |
|
|
543 |
// exported/opened via module declaration/descriptor
|
|
544 |
if (isStaticallyExportedOrOpen(pn, other, open))
|
|
545 |
return true;
|
|
546 |
|
|
547 |
// exported via addExports/addOpens
|
|
548 |
if (isReflectivelyExportedOrOpen(pn, other, open))
|
|
549 |
return true;
|
|
550 |
|
|
551 |
// not exported or open to other
|
|
552 |
return false;
|
|
553 |
}
|
|
554 |
|
|
555 |
/**
|
|
556 |
* Returns {@code true} if this module exports or opens a package to
|
|
557 |
* the given module via its module declaration.
|
|
558 |
*/
|
|
559 |
private boolean isStaticallyExportedOrOpen(String pn, Module other, boolean open) {
|
|
560 |
// package is open to everyone or <other>
|
|
561 |
Map<String, Set<Module>> openPackages = this.openPackages;
|
|
562 |
if (openPackages != null) {
|
|
563 |
Set<Module> targets = openPackages.get(pn);
|
|
564 |
if (targets != null) {
|
|
565 |
if (targets.contains(EVERYONE_MODULE))
|
|
566 |
return true;
|
|
567 |
if (other != EVERYONE_MODULE && targets.contains(other))
|
|
568 |
return true;
|
|
569 |
}
|
|
570 |
}
|
|
571 |
|
|
572 |
if (!open) {
|
|
573 |
// package is exported to everyone or <other>
|
|
574 |
Map<String, Set<Module>> exportedPackages = this.exportedPackages;
|
|
575 |
if (exportedPackages != null) {
|
|
576 |
Set<Module> targets = exportedPackages.get(pn);
|
|
577 |
if (targets != null) {
|
|
578 |
if (targets.contains(EVERYONE_MODULE))
|
|
579 |
return true;
|
|
580 |
if (other != EVERYONE_MODULE && targets.contains(other))
|
|
581 |
return true;
|
|
582 |
}
|
|
583 |
}
|
|
584 |
}
|
|
585 |
|
|
586 |
return false;
|
|
587 |
}
|
|
588 |
|
|
589 |
|
|
590 |
/**
|
|
591 |
* Returns {@code true} if this module reflectively exports or opens given
|
|
592 |
* package package to the given module.
|
|
593 |
*/
|
|
594 |
private boolean isReflectivelyExportedOrOpen(String pn, Module other, boolean open) {
|
|
595 |
// exported or open to all modules
|
|
596 |
Map<String, Boolean> exports = reflectivelyExports.get(this, EVERYONE_MODULE);
|
|
597 |
if (exports != null) {
|
|
598 |
Boolean b = exports.get(pn);
|
|
599 |
if (b != null) {
|
|
600 |
boolean isOpen = b.booleanValue();
|
|
601 |
if (!open || isOpen) return true;
|
|
602 |
}
|
|
603 |
}
|
|
604 |
|
|
605 |
if (other != EVERYONE_MODULE) {
|
|
606 |
|
|
607 |
// exported or open to other
|
|
608 |
exports = reflectivelyExports.get(this, other);
|
|
609 |
if (exports != null) {
|
|
610 |
Boolean b = exports.get(pn);
|
|
611 |
if (b != null) {
|
|
612 |
boolean isOpen = b.booleanValue();
|
|
613 |
if (!open || isOpen) return true;
|
|
614 |
}
|
|
615 |
}
|
|
616 |
|
|
617 |
// other is an unnamed module && exported or open to all unnamed
|
|
618 |
if (!other.isNamed()) {
|
|
619 |
exports = reflectivelyExports.get(this, ALL_UNNAMED_MODULE);
|
|
620 |
if (exports != null) {
|
|
621 |
Boolean b = exports.get(pn);
|
|
622 |
if (b != null) {
|
|
623 |
boolean isOpen = b.booleanValue();
|
|
624 |
if (!open || isOpen) return true;
|
|
625 |
}
|
|
626 |
}
|
|
627 |
}
|
|
628 |
|
|
629 |
}
|
|
630 |
|
|
631 |
return false;
|
|
632 |
}
|
|
633 |
|
|
634 |
|
|
635 |
/**
|
|
636 |
* If the caller's module is this module then update this module to export
|
|
637 |
* the given package to the given module.
|
|
638 |
*
|
|
639 |
* <p> This method has no effect if the package is already exported (or
|
|
640 |
* <em>open</em>) to the given module. </p>
|
|
641 |
*
|
|
642 |
* @apiNote As specified in section 5.4.3 of the <cite>The Java™
|
|
643 |
* Virtual Machine Specification </cite>, if an attempt to resolve a
|
|
644 |
* symbolic reference fails because of a linkage error, then subsequent
|
|
645 |
* attempts to resolve the reference always fail with the same error that
|
|
646 |
* was thrown as a result of the initial resolution attempt.
|
|
647 |
*
|
|
648 |
* @param pn
|
|
649 |
* The package name
|
|
650 |
* @param other
|
|
651 |
* The module
|
|
652 |
*
|
|
653 |
* @return this module
|
|
654 |
*
|
|
655 |
* @throws IllegalArgumentException
|
|
656 |
* If {@code pn} is {@code null}, or this is a named module and the
|
|
657 |
* package {@code pn} is not a package in this module
|
|
658 |
* @throws IllegalCallerException
|
|
659 |
* If this is a named module and the caller's module is not this
|
|
660 |
* module
|
|
661 |
*
|
|
662 |
* @jvms 5.4.3 Resolution
|
|
663 |
* @see #isExported(String,Module)
|
|
664 |
*/
|
|
665 |
@CallerSensitive
|
|
666 |
public Module addExports(String pn, Module other) {
|
|
667 |
if (pn == null)
|
|
668 |
throw new IllegalArgumentException("package is null");
|
|
669 |
Objects.requireNonNull(other);
|
|
670 |
|
|
671 |
if (isNamed()) {
|
|
672 |
Module caller = getCallerModule(Reflection.getCallerClass());
|
|
673 |
if (caller != this) {
|
|
674 |
throw new IllegalCallerException(caller + " != " + this);
|
|
675 |
}
|
|
676 |
implAddExportsOrOpens(pn, other, /*open*/false, /*syncVM*/true);
|
|
677 |
}
|
|
678 |
|
|
679 |
return this;
|
|
680 |
}
|
|
681 |
|
|
682 |
/**
|
|
683 |
* If this module has <em>opened</em> a package to at least the caller
|
|
684 |
* module then update this module to open the package to the given module.
|
|
685 |
* Opening a package with this method allows all types in the package,
|
|
686 |
* and all their members, not just public types and their public members,
|
|
687 |
* to be reflected on by the given module when using APIs that support
|
|
688 |
* private access or a way to bypass or suppress default Java language
|
|
689 |
* access control checks.
|
|
690 |
*
|
|
691 |
* <p> This method has no effect if the package is already <em>open</em>
|
|
692 |
* to the given module. </p>
|
|
693 |
*
|
|
694 |
* @param pn
|
|
695 |
* The package name
|
|
696 |
* @param other
|
|
697 |
* The module
|
|
698 |
*
|
|
699 |
* @return this module
|
|
700 |
*
|
|
701 |
* @throws IllegalArgumentException
|
|
702 |
* If {@code pn} is {@code null}, or this is a named module and the
|
|
703 |
* package {@code pn} is not a package in this module
|
|
704 |
* @throws IllegalCallerException
|
|
705 |
* If this is a named module and this module has not opened the
|
|
706 |
* package to at least the caller's module
|
|
707 |
*
|
|
708 |
* @see #isOpen(String,Module)
|
|
709 |
* @see AccessibleObject#setAccessible(boolean)
|
|
710 |
* @see java.lang.invoke.MethodHandles#privateLookupIn
|
|
711 |
*/
|
|
712 |
@CallerSensitive
|
|
713 |
public Module addOpens(String pn, Module other) {
|
|
714 |
if (pn == null)
|
|
715 |
throw new IllegalArgumentException("package is null");
|
|
716 |
Objects.requireNonNull(other);
|
|
717 |
|
|
718 |
if (isNamed()) {
|
|
719 |
Module caller = getCallerModule(Reflection.getCallerClass());
|
|
720 |
if (caller != this && (caller == null || !isOpen(pn, caller)))
|
|
721 |
throw new IllegalCallerException(pn + " is not open to " + caller);
|
|
722 |
implAddExportsOrOpens(pn, other, /*open*/true, /*syncVM*/true);
|
|
723 |
}
|
|
724 |
|
|
725 |
return this;
|
|
726 |
}
|
|
727 |
|
|
728 |
|
|
729 |
/**
|
|
730 |
* Updates this module to export a package unconditionally.
|
|
731 |
*
|
|
732 |
* @apiNote This method is for JDK tests only.
|
|
733 |
*/
|
|
734 |
void implAddExports(String pn) {
|
|
735 |
implAddExportsOrOpens(pn, Module.EVERYONE_MODULE, false, true);
|
|
736 |
}
|
|
737 |
|
|
738 |
/**
|
|
739 |
* Updates this module to export a package to another module.
|
|
740 |
*
|
|
741 |
* @apiNote Used by Instrumentation::redefineModule and --add-exports
|
|
742 |
*/
|
|
743 |
void implAddExports(String pn, Module other) {
|
|
744 |
implAddExportsOrOpens(pn, other, false, true);
|
|
745 |
}
|
|
746 |
|
|
747 |
/**
|
|
748 |
* Updates this module to export a package to all unnamed modules.
|
|
749 |
*
|
|
750 |
* @apiNote Used by the --add-exports command line option.
|
|
751 |
*/
|
|
752 |
void implAddExportsToAllUnnamed(String pn) {
|
|
753 |
implAddExportsOrOpens(pn, Module.ALL_UNNAMED_MODULE, false, true);
|
|
754 |
}
|
|
755 |
|
|
756 |
/**
|
|
757 |
* Updates this export to export a package unconditionally without
|
|
758 |
* notifying the VM.
|
|
759 |
*
|
|
760 |
* @apiNote This method is for VM white-box testing.
|
|
761 |
*/
|
|
762 |
void implAddExportsNoSync(String pn) {
|
|
763 |
implAddExportsOrOpens(pn.replace('/', '.'), Module.EVERYONE_MODULE, false, false);
|
|
764 |
}
|
|
765 |
|
|
766 |
/**
|
|
767 |
* Updates a module to export a package to another module without
|
|
768 |
* notifying the VM.
|
|
769 |
*
|
|
770 |
* @apiNote This method is for VM white-box testing.
|
|
771 |
*/
|
|
772 |
void implAddExportsNoSync(String pn, Module other) {
|
|
773 |
implAddExportsOrOpens(pn.replace('/', '.'), other, false, false);
|
|
774 |
}
|
|
775 |
|
|
776 |
/**
|
|
777 |
* Updates this module to open a package unconditionally.
|
|
778 |
*
|
|
779 |
* @apiNote This method is for JDK tests only.
|
|
780 |
*/
|
|
781 |
void implAddOpens(String pn) {
|
|
782 |
implAddExportsOrOpens(pn, Module.EVERYONE_MODULE, true, true);
|
|
783 |
}
|
|
784 |
|
|
785 |
/**
|
|
786 |
* Updates this module to open a package to another module.
|
|
787 |
*
|
|
788 |
* @apiNote Used by Instrumentation::redefineModule and --add-opens
|
|
789 |
*/
|
|
790 |
void implAddOpens(String pn, Module other) {
|
|
791 |
implAddExportsOrOpens(pn, other, true, true);
|
|
792 |
}
|
|
793 |
|
|
794 |
/**
|
|
795 |
* Updates this module to export a package to all unnamed modules.
|
|
796 |
*
|
|
797 |
* @apiNote Used by the --add-opens command line option.
|
|
798 |
*/
|
|
799 |
void implAddOpensToAllUnnamed(String pn) {
|
|
800 |
implAddExportsOrOpens(pn, Module.ALL_UNNAMED_MODULE, true, true);
|
|
801 |
}
|
|
802 |
|
|
803 |
|
|
804 |
/**
|
|
805 |
* Updates a module to export or open a module to another module.
|
|
806 |
*
|
|
807 |
* If {@code syncVM} is {@code true} then the VM is notified.
|
|
808 |
*/
|
|
809 |
private void implAddExportsOrOpens(String pn,
|
|
810 |
Module other,
|
|
811 |
boolean open,
|
|
812 |
boolean syncVM) {
|
|
813 |
Objects.requireNonNull(other);
|
|
814 |
Objects.requireNonNull(pn);
|
|
815 |
|
|
816 |
// all packages are open in unnamed, open, and automatic modules
|
|
817 |
if (!isNamed() || descriptor.isOpen() || descriptor.isAutomatic())
|
|
818 |
return;
|
|
819 |
|
|
820 |
// nothing to do if already exported/open to other
|
|
821 |
if (implIsExportedOrOpen(pn, other, open))
|
|
822 |
return;
|
|
823 |
|
|
824 |
// can only export a package in the module
|
|
825 |
if (!containsPackage(pn)) {
|
|
826 |
throw new IllegalArgumentException("package " + pn
|
|
827 |
+ " not in contents");
|
|
828 |
}
|
|
829 |
|
|
830 |
// update VM first, just in case it fails
|
|
831 |
if (syncVM) {
|
|
832 |
if (other == EVERYONE_MODULE) {
|
|
833 |
addExportsToAll0(this, pn);
|
|
834 |
} else if (other == ALL_UNNAMED_MODULE) {
|
|
835 |
addExportsToAllUnnamed0(this, pn);
|
|
836 |
} else {
|
|
837 |
addExports0(this, pn, other);
|
|
838 |
}
|
|
839 |
}
|
|
840 |
|
|
841 |
// add package name to reflectivelyExports if absent
|
|
842 |
Map<String, Boolean> map = reflectivelyExports
|
|
843 |
.computeIfAbsent(this, other,
|
|
844 |
(m1, m2) -> new ConcurrentHashMap<>());
|
|
845 |
|
|
846 |
if (open) {
|
|
847 |
map.put(pn, Boolean.TRUE); // may need to promote from FALSE to TRUE
|
|
848 |
} else {
|
|
849 |
map.putIfAbsent(pn, Boolean.FALSE);
|
|
850 |
}
|
|
851 |
}
|
|
852 |
|
|
853 |
|
|
854 |
// -- services --
|
|
855 |
|
|
856 |
// additional service type (2nd key) that some module (1st key) uses
|
|
857 |
private static final WeakPairMap<Module, Class<?>, Boolean> reflectivelyUses
|
|
858 |
= new WeakPairMap<>();
|
|
859 |
|
|
860 |
/**
|
|
861 |
* If the caller's module is this module then update this module to add a
|
|
862 |
* service dependence on the given service type. This method is intended
|
|
863 |
* for use by frameworks that invoke {@link java.util.ServiceLoader
|
|
864 |
* ServiceLoader} on behalf of other modules or where the framework is
|
|
865 |
* passed a reference to the service type by other code. This method is
|
|
866 |
* a no-op when invoked on an unnamed module or an automatic module.
|
|
867 |
*
|
|
868 |
* <p> This method does not cause {@link Configuration#resolveAndBind
|
|
869 |
* resolveAndBind} to be re-run. </p>
|
|
870 |
*
|
|
871 |
* @param service
|
|
872 |
* The service type
|
|
873 |
*
|
|
874 |
* @return this module
|
|
875 |
*
|
|
876 |
* @throws IllegalCallerException
|
|
877 |
* If this is a named module and the caller's module is not this
|
|
878 |
* module
|
|
879 |
*
|
|
880 |
* @see #canUse(Class)
|
|
881 |
* @see ModuleDescriptor#uses()
|
|
882 |
*/
|
|
883 |
@CallerSensitive
|
|
884 |
public Module addUses(Class<?> service) {
|
|
885 |
Objects.requireNonNull(service);
|
|
886 |
|
|
887 |
if (isNamed() && !descriptor.isAutomatic()) {
|
|
888 |
Module caller = getCallerModule(Reflection.getCallerClass());
|
|
889 |
if (caller != this) {
|
|
890 |
throw new IllegalCallerException(caller + " != " + this);
|
|
891 |
}
|
|
892 |
implAddUses(service);
|
|
893 |
}
|
|
894 |
|
|
895 |
return this;
|
|
896 |
}
|
|
897 |
|
|
898 |
/**
|
|
899 |
* Update this module to add a service dependence on the given service
|
|
900 |
* type.
|
|
901 |
*/
|
|
902 |
void implAddUses(Class<?> service) {
|
|
903 |
if (!canUse(service)) {
|
|
904 |
reflectivelyUses.putIfAbsent(this, service, Boolean.TRUE);
|
|
905 |
}
|
|
906 |
}
|
|
907 |
|
|
908 |
|
|
909 |
/**
|
|
910 |
* Indicates if this module has a service dependence on the given service
|
|
911 |
* type. This method always returns {@code true} when invoked on an unnamed
|
|
912 |
* module or an automatic module.
|
|
913 |
*
|
|
914 |
* @param service
|
|
915 |
* The service type
|
|
916 |
*
|
|
917 |
* @return {@code true} if this module uses service type {@code st}
|
|
918 |
*
|
|
919 |
* @see #addUses(Class)
|
|
920 |
*/
|
|
921 |
public boolean canUse(Class<?> service) {
|
|
922 |
Objects.requireNonNull(service);
|
|
923 |
|
|
924 |
if (!isNamed())
|
|
925 |
return true;
|
|
926 |
|
|
927 |
if (descriptor.isAutomatic())
|
|
928 |
return true;
|
|
929 |
|
|
930 |
// uses was declared
|
|
931 |
if (descriptor.uses().contains(service.getName()))
|
|
932 |
return true;
|
|
933 |
|
|
934 |
// uses added via addUses
|
|
935 |
return reflectivelyUses.containsKeyPair(this, service);
|
|
936 |
}
|
|
937 |
|
|
938 |
|
|
939 |
|
|
940 |
// -- packages --
|
|
941 |
|
|
942 |
// Additional packages that are added to the module at run-time.
|
|
943 |
private volatile Map<String, Boolean> extraPackages;
|
|
944 |
|
|
945 |
private boolean containsPackage(String pn) {
|
|
946 |
if (descriptor.packages().contains(pn))
|
|
947 |
return true;
|
|
948 |
Map<String, Boolean> extraPackages = this.extraPackages;
|
|
949 |
if (extraPackages != null && extraPackages.containsKey(pn))
|
|
950 |
return true;
|
|
951 |
return false;
|
|
952 |
}
|
|
953 |
|
|
954 |
|
|
955 |
/**
|
|
956 |
* Returns the set of package names for the packages in this module.
|
|
957 |
*
|
|
958 |
* <p> For named modules, the returned set contains an element for each
|
|
959 |
* package in the module. </p>
|
|
960 |
*
|
|
961 |
* <p> For unnamed modules, this method is the equivalent to invoking the
|
|
962 |
* {@link ClassLoader#getDefinedPackages() getDefinedPackages} method of
|
|
963 |
* this module's class loader and returning the set of package names. </p>
|
|
964 |
*
|
|
965 |
* @return the set of the package names of the packages in this module
|
|
966 |
*/
|
|
967 |
public Set<String> getPackages() {
|
|
968 |
if (isNamed()) {
|
|
969 |
|
|
970 |
Set<String> packages = descriptor.packages();
|
|
971 |
Map<String, Boolean> extraPackages = this.extraPackages;
|
|
972 |
if (extraPackages == null) {
|
|
973 |
return packages;
|
|
974 |
} else {
|
|
975 |
return Stream.concat(packages.stream(),
|
|
976 |
extraPackages.keySet().stream())
|
|
977 |
.collect(Collectors.toSet());
|
|
978 |
}
|
|
979 |
|
|
980 |
} else {
|
|
981 |
// unnamed module
|
|
982 |
Stream<Package> packages;
|
|
983 |
if (loader == null) {
|
|
984 |
packages = BootLoader.packages();
|
|
985 |
} else {
|
|
986 |
packages = SharedSecrets.getJavaLangAccess().packages(loader);
|
|
987 |
}
|
|
988 |
return packages.map(Package::getName).collect(Collectors.toSet());
|
|
989 |
}
|
|
990 |
}
|
|
991 |
|
|
992 |
/**
|
|
993 |
* Add a package to this module without notifying the VM.
|
|
994 |
*
|
|
995 |
* @apiNote This method is VM white-box testing.
|
|
996 |
*/
|
|
997 |
void implAddPackageNoSync(String pn) {
|
|
998 |
implAddPackage(pn.replace('/', '.'), false);
|
|
999 |
}
|
|
1000 |
|
|
1001 |
/**
|
|
1002 |
* Add a package to this module.
|
|
1003 |
*
|
|
1004 |
* If {@code syncVM} is {@code true} then the VM is notified. This method is
|
|
1005 |
* a no-op if this is an unnamed module or the module already contains the
|
|
1006 |
* package.
|
|
1007 |
*
|
|
1008 |
* @throws IllegalArgumentException if the package name is not legal
|
|
1009 |
* @throws IllegalStateException if the package is defined to another module
|
|
1010 |
*/
|
|
1011 |
private void implAddPackage(String pn, boolean syncVM) {
|
|
1012 |
// no-op if unnamed module
|
|
1013 |
if (!isNamed())
|
|
1014 |
return;
|
|
1015 |
|
|
1016 |
// no-op if module contains the package
|
|
1017 |
if (containsPackage(pn))
|
|
1018 |
return;
|
|
1019 |
|
|
1020 |
// check package name is legal for named modules
|
|
1021 |
if (pn.isEmpty())
|
|
1022 |
throw new IllegalArgumentException("Cannot add <unnamed> package");
|
|
1023 |
for (int i=0; i<pn.length(); i++) {
|
|
1024 |
char c = pn.charAt(i);
|
|
1025 |
if (c == '/' || c == ';' || c == '[') {
|
|
1026 |
throw new IllegalArgumentException("Illegal character: " + c);
|
|
1027 |
}
|
|
1028 |
}
|
|
1029 |
|
|
1030 |
// create extraPackages if needed
|
|
1031 |
Map<String, Boolean> extraPackages = this.extraPackages;
|
|
1032 |
if (extraPackages == null) {
|
|
1033 |
synchronized (this) {
|
|
1034 |
extraPackages = this.extraPackages;
|
|
1035 |
if (extraPackages == null)
|
|
1036 |
this.extraPackages = extraPackages = new ConcurrentHashMap<>();
|
|
1037 |
}
|
|
1038 |
}
|
|
1039 |
|
|
1040 |
// update VM first in case it fails. This is a no-op if another thread
|
|
1041 |
// beats us to add the package first
|
|
1042 |
if (syncVM) {
|
|
1043 |
// throws IllegalStateException if defined to another module
|
|
1044 |
addPackage0(this, pn);
|
|
1045 |
if (descriptor.isOpen() || descriptor.isAutomatic()) {
|
|
1046 |
addExportsToAll0(this, pn);
|
|
1047 |
}
|
|
1048 |
}
|
|
1049 |
extraPackages.putIfAbsent(pn, Boolean.TRUE);
|
|
1050 |
}
|
|
1051 |
|
|
1052 |
|
|
1053 |
// -- creating Module objects --
|
|
1054 |
|
|
1055 |
/**
|
|
1056 |
* Defines all module in a configuration to the runtime.
|
|
1057 |
*
|
|
1058 |
* @return a map of module name to runtime {@code Module}
|
|
1059 |
*
|
|
1060 |
* @throws IllegalArgumentException
|
|
1061 |
* If defining any of the modules to the VM fails
|
|
1062 |
*/
|
|
1063 |
static Map<String, Module> defineModules(Configuration cf,
|
|
1064 |
Function<String, ClassLoader> clf,
|
|
1065 |
ModuleLayer layer)
|
|
1066 |
{
|
|
1067 |
Map<String, Module> nameToModule = new HashMap<>();
|
|
1068 |
Map<String, ClassLoader> moduleToLoader = new HashMap<>();
|
|
1069 |
|
|
1070 |
boolean isBootLayer = (ModuleLayer.boot() == null);
|
|
1071 |
Set<ClassLoader> loaders = new HashSet<>();
|
|
1072 |
|
|
1073 |
// map each module to a class loader
|
|
1074 |
for (ResolvedModule resolvedModule : cf.modules()) {
|
|
1075 |
String name = resolvedModule.name();
|
|
1076 |
ClassLoader loader = clf.apply(name);
|
|
1077 |
if (loader != null) {
|
|
1078 |
moduleToLoader.put(name, loader);
|
|
1079 |
loaders.add(loader);
|
|
1080 |
} else if (!isBootLayer) {
|
|
1081 |
throw new IllegalArgumentException("loader can't be 'null'");
|
|
1082 |
}
|
|
1083 |
}
|
|
1084 |
|
|
1085 |
// define each module in the configuration to the VM
|
|
1086 |
for (ResolvedModule resolvedModule : cf.modules()) {
|
|
1087 |
ModuleReference mref = resolvedModule.reference();
|
|
1088 |
ModuleDescriptor descriptor = mref.descriptor();
|
|
1089 |
String name = descriptor.name();
|
|
1090 |
URI uri = mref.location().orElse(null);
|
|
1091 |
ClassLoader loader = moduleToLoader.get(resolvedModule.name());
|
|
1092 |
Module m;
|
|
1093 |
if (loader == null && isBootLayer && name.equals("java.base")) {
|
|
1094 |
// java.base is already defined to the VM
|
|
1095 |
m = Object.class.getModule();
|
|
1096 |
} else {
|
|
1097 |
m = new Module(layer, loader, descriptor, uri);
|
|
1098 |
}
|
|
1099 |
nameToModule.put(name, m);
|
|
1100 |
moduleToLoader.put(name, loader);
|
|
1101 |
}
|
|
1102 |
|
|
1103 |
// setup readability and exports
|
|
1104 |
for (ResolvedModule resolvedModule : cf.modules()) {
|
|
1105 |
ModuleReference mref = resolvedModule.reference();
|
|
1106 |
ModuleDescriptor descriptor = mref.descriptor();
|
|
1107 |
|
|
1108 |
String mn = descriptor.name();
|
|
1109 |
Module m = nameToModule.get(mn);
|
|
1110 |
assert m != null;
|
|
1111 |
|
|
1112 |
// reads
|
|
1113 |
Set<Module> reads = new HashSet<>();
|
|
1114 |
|
|
1115 |
// name -> source Module when in parent layer
|
|
1116 |
Map<String, Module> nameToSource = Collections.emptyMap();
|
|
1117 |
|
|
1118 |
for (ResolvedModule other : resolvedModule.reads()) {
|
|
1119 |
Module m2 = null;
|
|
1120 |
if (other.configuration() == cf) {
|
|
1121 |
// this configuration
|
|
1122 |
m2 = nameToModule.get(other.name());
|
|
1123 |
assert m2 != null;
|
|
1124 |
} else {
|
|
1125 |
// parent layer
|
|
1126 |
for (ModuleLayer parent: layer.parents()) {
|
|
1127 |
m2 = findModule(parent, other);
|
|
1128 |
if (m2 != null)
|
|
1129 |
break;
|
|
1130 |
}
|
|
1131 |
assert m2 != null;
|
|
1132 |
if (nameToSource.isEmpty())
|
|
1133 |
nameToSource = new HashMap<>();
|
|
1134 |
nameToSource.put(other.name(), m2);
|
|
1135 |
}
|
|
1136 |
reads.add(m2);
|
|
1137 |
|
|
1138 |
// update VM view
|
|
1139 |
addReads0(m, m2);
|
|
1140 |
}
|
|
1141 |
m.reads = reads;
|
|
1142 |
|
|
1143 |
// automatic modules read all unnamed modules
|
|
1144 |
if (descriptor.isAutomatic()) {
|
|
1145 |
m.implAddReads(ALL_UNNAMED_MODULE, true);
|
|
1146 |
}
|
|
1147 |
|
|
1148 |
// exports and opens
|
|
1149 |
initExportsAndOpens(m, nameToSource, nameToModule, layer.parents());
|
|
1150 |
}
|
|
1151 |
|
|
1152 |
// register the modules in the boot layer
|
|
1153 |
if (isBootLayer) {
|
|
1154 |
for (ResolvedModule resolvedModule : cf.modules()) {
|
|
1155 |
ModuleReference mref = resolvedModule.reference();
|
|
1156 |
ModuleDescriptor descriptor = mref.descriptor();
|
|
1157 |
if (!descriptor.provides().isEmpty()) {
|
|
1158 |
String name = descriptor.name();
|
|
1159 |
Module m = nameToModule.get(name);
|
|
1160 |
ClassLoader loader = moduleToLoader.get(name);
|
|
1161 |
ServicesCatalog catalog;
|
|
1162 |
if (loader == null) {
|
|
1163 |
catalog = BootLoader.getServicesCatalog();
|
|
1164 |
} else {
|
|
1165 |
catalog = ServicesCatalog.getServicesCatalog(loader);
|
|
1166 |
}
|
|
1167 |
catalog.register(m);
|
|
1168 |
}
|
|
1169 |
}
|
|
1170 |
}
|
|
1171 |
|
|
1172 |
// record that there is a layer with modules defined to the class loader
|
|
1173 |
for (ClassLoader loader : loaders) {
|
|
1174 |
layer.bindToLoader(loader);
|
|
1175 |
}
|
|
1176 |
|
|
1177 |
return nameToModule;
|
|
1178 |
}
|
|
1179 |
|
|
1180 |
|
|
1181 |
/**
|
|
1182 |
* Find the runtime Module corresponding to the given ResolvedModule
|
|
1183 |
* in the given parent layer (or its parents).
|
|
1184 |
*/
|
|
1185 |
private static Module findModule(ModuleLayer parent,
|
|
1186 |
ResolvedModule resolvedModule) {
|
|
1187 |
Configuration cf = resolvedModule.configuration();
|
|
1188 |
String dn = resolvedModule.name();
|
|
1189 |
return parent.layers()
|
|
1190 |
.filter(l -> l.configuration() == cf)
|
|
1191 |
.findAny()
|
|
1192 |
.map(layer -> {
|
|
1193 |
Optional<Module> om = layer.findModule(dn);
|
|
1194 |
assert om.isPresent() : dn + " not found in layer";
|
|
1195 |
Module m = om.get();
|
|
1196 |
assert m.getLayer() == layer : m + " not in expected layer";
|
|
1197 |
return m;
|
|
1198 |
})
|
|
1199 |
.orElse(null);
|
|
1200 |
}
|
|
1201 |
|
|
1202 |
|
|
1203 |
/**
|
|
1204 |
* Initialize the maps of exported and open packages for module m.
|
|
1205 |
*/
|
|
1206 |
private static void initExportsAndOpens(Module m,
|
|
1207 |
Map<String, Module> nameToSource,
|
|
1208 |
Map<String, Module> nameToModule,
|
|
1209 |
List<ModuleLayer> parents) {
|
|
1210 |
// The VM doesn't special case open or automatic modules so need to
|
|
1211 |
// export all packages
|
|
1212 |
ModuleDescriptor descriptor = m.getDescriptor();
|
|
1213 |
if (descriptor.isOpen() || descriptor.isAutomatic()) {
|
|
1214 |
assert descriptor.opens().isEmpty();
|
|
1215 |
for (String source : descriptor.packages()) {
|
|
1216 |
addExportsToAll0(m, source);
|
|
1217 |
}
|
|
1218 |
return;
|
|
1219 |
}
|
|
1220 |
|
|
1221 |
Map<String, Set<Module>> openPackages = new HashMap<>();
|
|
1222 |
Map<String, Set<Module>> exportedPackages = new HashMap<>();
|
|
1223 |
|
|
1224 |
// process the open packages first
|
|
1225 |
for (Opens opens : descriptor.opens()) {
|
|
1226 |
String source = opens.source();
|
|
1227 |
|
|
1228 |
if (opens.isQualified()) {
|
|
1229 |
// qualified opens
|
|
1230 |
Set<Module> targets = new HashSet<>();
|
|
1231 |
for (String target : opens.targets()) {
|
|
1232 |
Module m2 = findModule(target, nameToSource, nameToModule, parents);
|
|
1233 |
if (m2 != null) {
|
|
1234 |
addExports0(m, source, m2);
|
|
1235 |
targets.add(m2);
|
|
1236 |
}
|
|
1237 |
}
|
|
1238 |
if (!targets.isEmpty()) {
|
|
1239 |
openPackages.put(source, targets);
|
|
1240 |
}
|
|
1241 |
} else {
|
|
1242 |
// unqualified opens
|
|
1243 |
addExportsToAll0(m, source);
|
|
1244 |
openPackages.put(source, EVERYONE_SET);
|
|
1245 |
}
|
|
1246 |
}
|
|
1247 |
|
|
1248 |
// next the exports, skipping exports when the package is open
|
|
1249 |
for (Exports exports : descriptor.exports()) {
|
|
1250 |
String source = exports.source();
|
|
1251 |
|
|
1252 |
// skip export if package is already open to everyone
|
|
1253 |
Set<Module> openToTargets = openPackages.get(source);
|
|
1254 |
if (openToTargets != null && openToTargets.contains(EVERYONE_MODULE))
|
|
1255 |
continue;
|
|
1256 |
|
|
1257 |
if (exports.isQualified()) {
|
|
1258 |
// qualified exports
|
|
1259 |
Set<Module> targets = new HashSet<>();
|
|
1260 |
for (String target : exports.targets()) {
|
|
1261 |
Module m2 = findModule(target, nameToSource, nameToModule, parents);
|
|
1262 |
if (m2 != null) {
|
|
1263 |
// skip qualified export if already open to m2
|
|
1264 |
if (openToTargets == null || !openToTargets.contains(m2)) {
|
|
1265 |
addExports0(m, source, m2);
|
|
1266 |
targets.add(m2);
|
|
1267 |
}
|
|
1268 |
}
|
|
1269 |
}
|
|
1270 |
if (!targets.isEmpty()) {
|
|
1271 |
exportedPackages.put(source, targets);
|
|
1272 |
}
|
|
1273 |
|
|
1274 |
} else {
|
|
1275 |
// unqualified exports
|
|
1276 |
addExportsToAll0(m, source);
|
|
1277 |
exportedPackages.put(source, EVERYONE_SET);
|
|
1278 |
}
|
|
1279 |
}
|
|
1280 |
|
|
1281 |
if (!openPackages.isEmpty())
|
|
1282 |
m.openPackages = openPackages;
|
|
1283 |
if (!exportedPackages.isEmpty())
|
|
1284 |
m.exportedPackages = exportedPackages;
|
|
1285 |
}
|
|
1286 |
|
|
1287 |
/**
|
|
1288 |
* Find the runtime Module with the given name. The module name is the
|
|
1289 |
* name of a target module in a qualified exports or opens directive.
|
|
1290 |
*
|
|
1291 |
* @param target The target module to find
|
|
1292 |
* @param nameToSource The modules in parent layers that are read
|
|
1293 |
* @param nameToModule The modules in the layer under construction
|
|
1294 |
* @param parents The parent layers
|
|
1295 |
*/
|
|
1296 |
private static Module findModule(String target,
|
|
1297 |
Map<String, Module> nameToSource,
|
|
1298 |
Map<String, Module> nameToModule,
|
|
1299 |
List<ModuleLayer> parents) {
|
|
1300 |
Module m = nameToSource.get(target);
|
|
1301 |
if (m == null) {
|
|
1302 |
m = nameToModule.get(target);
|
|
1303 |
if (m == null) {
|
|
1304 |
for (ModuleLayer parent : parents) {
|
|
1305 |
m = parent.findModule(target).orElse(null);
|
|
1306 |
if (m != null) break;
|
|
1307 |
}
|
|
1308 |
}
|
|
1309 |
}
|
|
1310 |
return m;
|
|
1311 |
}
|
|
1312 |
|
|
1313 |
|
|
1314 |
// -- annotations --
|
|
1315 |
|
|
1316 |
/**
|
|
1317 |
* {@inheritDoc}
|
|
1318 |
* This method returns {@code null} when invoked on an unnamed module.
|
|
1319 |
*/
|
|
1320 |
@Override
|
|
1321 |
public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
|
|
1322 |
return moduleInfoClass().getDeclaredAnnotation(annotationClass);
|
|
1323 |
}
|
|
1324 |
|
|
1325 |
/**
|
|
1326 |
* {@inheritDoc}
|
|
1327 |
* This method returns an empty array when invoked on an unnamed module.
|
|
1328 |
*/
|
|
1329 |
@Override
|
|
1330 |
public Annotation[] getAnnotations() {
|
|
1331 |
return moduleInfoClass().getAnnotations();
|
|
1332 |
}
|
|
1333 |
|
|
1334 |
/**
|
|
1335 |
* {@inheritDoc}
|
|
1336 |
* This method returns an empty array when invoked on an unnamed module.
|
|
1337 |
*/
|
|
1338 |
@Override
|
|
1339 |
public Annotation[] getDeclaredAnnotations() {
|
|
1340 |
return moduleInfoClass().getDeclaredAnnotations();
|
|
1341 |
}
|
|
1342 |
|
|
1343 |
// cached class file with annotations
|
|
1344 |
private volatile Class<?> moduleInfoClass;
|
|
1345 |
|
|
1346 |
private Class<?> moduleInfoClass() {
|
|
1347 |
Class<?> clazz = this.moduleInfoClass;
|
|
1348 |
if (clazz != null)
|
|
1349 |
return clazz;
|
|
1350 |
|
|
1351 |
synchronized (this) {
|
|
1352 |
clazz = this.moduleInfoClass;
|
|
1353 |
if (clazz == null) {
|
|
1354 |
if (isNamed()) {
|
|
1355 |
PrivilegedAction<Class<?>> pa = this::loadModuleInfoClass;
|
|
1356 |
clazz = AccessController.doPrivileged(pa);
|
|
1357 |
}
|
|
1358 |
if (clazz == null) {
|
|
1359 |
class DummyModuleInfo { }
|
|
1360 |
clazz = DummyModuleInfo.class;
|
|
1361 |
}
|
|
1362 |
this.moduleInfoClass = clazz;
|
|
1363 |
}
|
|
1364 |
return clazz;
|
|
1365 |
}
|
|
1366 |
}
|
|
1367 |
|
|
1368 |
private Class<?> loadModuleInfoClass() {
|
|
1369 |
Class<?> clazz = null;
|
|
1370 |
try (InputStream in = getResourceAsStream("module-info.class")) {
|
|
1371 |
if (in != null)
|
|
1372 |
clazz = loadModuleInfoClass(in);
|
|
1373 |
} catch (Exception ignore) { }
|
|
1374 |
return clazz;
|
|
1375 |
}
|
|
1376 |
|
|
1377 |
/**
|
|
1378 |
* Loads module-info.class as a package-private interface in a class loader
|
|
1379 |
* that is a child of this module's class loader.
|
|
1380 |
*/
|
|
1381 |
private Class<?> loadModuleInfoClass(InputStream in) throws IOException {
|
|
1382 |
final String MODULE_INFO = "module-info";
|
|
1383 |
|
|
1384 |
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS
|
|
1385 |
+ ClassWriter.COMPUTE_FRAMES);
|
|
1386 |
|
|
1387 |
ClassVisitor cv = new ClassVisitor(Opcodes.ASM5, cw) {
|
|
1388 |
@Override
|
|
1389 |
public void visit(int version,
|
|
1390 |
int access,
|
|
1391 |
String name,
|
|
1392 |
String signature,
|
|
1393 |
String superName,
|
|
1394 |
String[] interfaces) {
|
|
1395 |
cw.visit(version,
|
|
1396 |
Opcodes.ACC_INTERFACE
|
|
1397 |
+ Opcodes.ACC_ABSTRACT
|
|
1398 |
+ Opcodes.ACC_SYNTHETIC,
|
|
1399 |
MODULE_INFO,
|
|
1400 |
null,
|
|
1401 |
"java/lang/Object",
|
|
1402 |
null);
|
|
1403 |
}
|
|
1404 |
@Override
|
|
1405 |
public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
|
|
1406 |
// keep annotations
|
|
1407 |
return super.visitAnnotation(desc, visible);
|
|
1408 |
}
|
|
1409 |
@Override
|
|
1410 |
public void visitAttribute(Attribute attr) {
|
|
1411 |
// drop non-annotation attributes
|
|
1412 |
}
|
|
1413 |
};
|
|
1414 |
|
|
1415 |
ClassReader cr = new ClassReader(in);
|
|
1416 |
cr.accept(cv, 0);
|
|
1417 |
byte[] bytes = cw.toByteArray();
|
|
1418 |
|
|
1419 |
ClassLoader cl = new ClassLoader(loader) {
|
|
1420 |
@Override
|
|
1421 |
protected Class<?> findClass(String cn)throws ClassNotFoundException {
|
|
1422 |
if (cn.equals(MODULE_INFO)) {
|
|
1423 |
return super.defineClass(cn, bytes, 0, bytes.length);
|
|
1424 |
} else {
|
|
1425 |
throw new ClassNotFoundException(cn);
|
|
1426 |
}
|
|
1427 |
}
|
|
1428 |
};
|
|
1429 |
|
|
1430 |
try {
|
|
1431 |
return cl.loadClass(MODULE_INFO);
|
|
1432 |
} catch (ClassNotFoundException e) {
|
|
1433 |
throw new InternalError(e);
|
|
1434 |
}
|
|
1435 |
}
|
|
1436 |
|
|
1437 |
|
|
1438 |
// -- misc --
|
|
1439 |
|
|
1440 |
|
|
1441 |
/**
|
|
1442 |
* Returns an input stream for reading a resource in this module.
|
|
1443 |
* The {@code name} parameter is a {@code '/'}-separated path name that
|
|
1444 |
* identifies the resource. As with {@link Class#getResourceAsStream
|
|
1445 |
* Class.getResourceAsStream}, this method delegates to the module's class
|
|
1446 |
* loader {@link ClassLoader#findResource(String,String)
|
|
1447 |
* findResource(String,String)} method, invoking it with the module name
|
|
1448 |
* (or {@code null} when the module is unnamed) and the name of the
|
|
1449 |
* resource. If the resource name has a leading slash then it is dropped
|
|
1450 |
* before delegation.
|
|
1451 |
*
|
|
1452 |
* <p> A resource in a named module may be <em>encapsulated</em> so that
|
|
1453 |
* it cannot be located by code in other modules. Whether a resource can be
|
|
1454 |
* located or not is determined as follows: </p>
|
|
1455 |
*
|
|
1456 |
* <ul>
|
|
1457 |
* <li> If the resource name ends with "{@code .class}" then it is not
|
|
1458 |
* encapsulated. </li>
|
|
1459 |
*
|
|
1460 |
* <li> A <em>package name</em> is derived from the resource name. If
|
|
1461 |
* the package name is a {@link #getPackages() package} in the module
|
|
1462 |
* then the resource can only be located by the caller of this method
|
|
1463 |
* when the package is {@link #isOpen(String,Module) open} to at least
|
|
1464 |
* the caller's module. If the resource is not in a package in the module
|
|
1465 |
* then the resource is not encapsulated. </li>
|
|
1466 |
* </ul>
|
|
1467 |
*
|
|
1468 |
* <p> In the above, the <em>package name</em> for a resource is derived
|
|
1469 |
* from the subsequence of characters that precedes the last {@code '/'} in
|
|
1470 |
* the name and then replacing each {@code '/'} character in the subsequence
|
|
1471 |
* with {@code '.'}. A leading slash is ignored when deriving the package
|
|
1472 |
* name. As an example, the package name derived for a resource named
|
|
1473 |
* "{@code a/b/c/foo.properties}" is "{@code a.b.c}". A resource name
|
|
1474 |
* with the name "{@code META-INF/MANIFEST.MF}" is never encapsulated
|
|
1475 |
* because "{@code META-INF}" is not a legal package name. </p>
|
|
1476 |
*
|
|
1477 |
* <p> This method returns {@code null} if the resource is not in this
|
|
1478 |
* module, the resource is encapsulated and cannot be located by the caller,
|
|
1479 |
* or access to the resource is denied by the security manager. </p>
|
|
1480 |
*
|
|
1481 |
* @param name
|
|
1482 |
* The resource name
|
|
1483 |
*
|
|
1484 |
* @return An input stream for reading the resource or {@code null}
|
|
1485 |
*
|
|
1486 |
* @throws IOException
|
|
1487 |
* If an I/O error occurs
|
|
1488 |
*
|
|
1489 |
* @see Class#getResourceAsStream(String)
|
|
1490 |
*/
|
|
1491 |
@CallerSensitive
|
|
1492 |
public InputStream getResourceAsStream(String name) throws IOException {
|
|
1493 |
if (name.startsWith("/")) {
|
|
1494 |
name = name.substring(1);
|
|
1495 |
}
|
|
1496 |
|
|
1497 |
if (isNamed() && Resources.canEncapsulate(name)) {
|
|
1498 |
Module caller = getCallerModule(Reflection.getCallerClass());
|
|
1499 |
if (caller != this && caller != Object.class.getModule()) {
|
|
1500 |
String pn = Resources.toPackageName(name);
|
|
1501 |
if (getPackages().contains(pn)) {
|
|
1502 |
if (caller == null && !isOpen(pn)) {
|
|
1503 |
// no caller, package not open
|
|
1504 |
return null;
|
|
1505 |
}
|
|
1506 |
if (!isOpen(pn, caller)) {
|
|
1507 |
// package not open to caller
|
|
1508 |
return null;
|
|
1509 |
}
|
|
1510 |
}
|
|
1511 |
}
|
|
1512 |
}
|
|
1513 |
|
|
1514 |
String mn = this.name;
|
|
1515 |
|
|
1516 |
// special-case built-in class loaders to avoid URL connection
|
|
1517 |
if (loader == null) {
|
|
1518 |
return BootLoader.findResourceAsStream(mn, name);
|
|
1519 |
} else if (loader instanceof BuiltinClassLoader) {
|
|
1520 |
return ((BuiltinClassLoader) loader).findResourceAsStream(mn, name);
|
|
1521 |
}
|
|
1522 |
|
|
1523 |
// locate resource in module
|
|
1524 |
JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
|
|
1525 |
URL url = jla.findResource(loader, mn, name);
|
|
1526 |
if (url != null) {
|
|
1527 |
try {
|
|
1528 |
return url.openStream();
|
|
1529 |
} catch (SecurityException e) { }
|
|
1530 |
}
|
|
1531 |
|
|
1532 |
return null;
|
|
1533 |
}
|
|
1534 |
|
|
1535 |
/**
|
|
1536 |
* Returns the string representation of this module. For a named module,
|
|
1537 |
* the representation is the string {@code "module"}, followed by a space,
|
|
1538 |
* and then the module name. For an unnamed module, the representation is
|
|
1539 |
* the string {@code "unnamed module"}, followed by a space, and then an
|
|
1540 |
* implementation specific string that identifies the unnamed module.
|
|
1541 |
*
|
|
1542 |
* @return The string representation of this module
|
|
1543 |
*/
|
|
1544 |
@Override
|
|
1545 |
public String toString() {
|
|
1546 |
if (isNamed()) {
|
|
1547 |
return "module " + name;
|
|
1548 |
} else {
|
|
1549 |
String id = Integer.toHexString(System.identityHashCode(this));
|
|
1550 |
return "unnamed module @" + id;
|
|
1551 |
}
|
|
1552 |
}
|
|
1553 |
|
|
1554 |
/**
|
|
1555 |
* Returns the module that a given caller class is a member of. Returns
|
|
1556 |
* {@code null} if the caller is {@code null}.
|
|
1557 |
*/
|
|
1558 |
private Module getCallerModule(Class<?> caller) {
|
|
1559 |
return (caller != null) ? caller.getModule() : null;
|
|
1560 |
}
|
|
1561 |
|
|
1562 |
|
|
1563 |
// -- native methods --
|
|
1564 |
|
|
1565 |
// JVM_DefineModule
|
|
1566 |
private static native void defineModule0(Module module,
|
|
1567 |
boolean isOpen,
|
|
1568 |
String version,
|
|
1569 |
String location,
|
|
1570 |
String[] pns);
|
|
1571 |
|
|
1572 |
// JVM_AddReadsModule
|
|
1573 |
private static native void addReads0(Module from, Module to);
|
|
1574 |
|
|
1575 |
// JVM_AddModuleExports
|
|
1576 |
private static native void addExports0(Module from, String pn, Module to);
|
|
1577 |
|
|
1578 |
// JVM_AddModuleExportsToAll
|
|
1579 |
private static native void addExportsToAll0(Module from, String pn);
|
|
1580 |
|
|
1581 |
// JVM_AddModuleExportsToAllUnnamed
|
|
1582 |
private static native void addExportsToAllUnnamed0(Module from, String pn);
|
|
1583 |
|
|
1584 |
// JVM_AddModulePackage
|
|
1585 |
private static native void addPackage0(Module m, String pn);
|
|
1586 |
}
|