--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/internal/dynalink/beans/BeansLinker.java Wed Jul 05 21:04:26 2017 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,307 +0,0 @@
-/*
- * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-/*
- * This file is available under and governed by the GNU General Public
- * License version 2 only, as published by the Free Software Foundation.
- * However, the following notice accompanied the original version of this
- * file, and Oracle licenses the original version of this file under the BSD
- * license:
- */
-/*
- Copyright 2009-2013 Attila Szegedi
-
- Licensed under both the Apache License, Version 2.0 (the "Apache License")
- and the BSD License (the "BSD License"), with licensee being free to
- choose either of the two at their discretion.
-
- You may not use this file except in compliance with either the Apache
- License or the BSD License.
-
- If you choose to use this file in compliance with the Apache License, the
- following notice applies to you:
-
- You may obtain a copy of the Apache License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- implied. See the License for the specific language governing
- permissions and limitations under the License.
-
- If you choose to use this file in compliance with the BSD License, the
- following notice applies to you:
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- * Neither the name of the copyright holder nor the names of
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
- BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-package jdk.internal.dynalink.beans;
-
-import java.lang.invoke.MethodHandles.Lookup;
-import java.util.Collections;
-import java.util.Set;
-import jdk.internal.dynalink.DynamicLinkerFactory;
-import jdk.internal.dynalink.StandardOperation;
-import jdk.internal.dynalink.linker.GuardedInvocation;
-import jdk.internal.dynalink.linker.GuardingDynamicLinker;
-import jdk.internal.dynalink.linker.LinkRequest;
-import jdk.internal.dynalink.linker.LinkerServices;
-import jdk.internal.dynalink.linker.TypeBasedGuardingDynamicLinker;
-
-/**
- * A linker for ordinary Java objects. Normally used as the ultimate fallback
- * linker by the {@link DynamicLinkerFactory} so it is given the chance to link
- * calls to all objects that no other linker recognized. Specifically, this
- * linker will:
- * <ul>
- * <li>expose all public methods of form {@code setXxx()}, {@code getXxx()},
- * and {@code isXxx()} as property setters and getters for
- * {@link StandardOperation#SET_PROPERTY} and {@link StandardOperation#GET_PROPERTY}
- * operations;</li>
- * <li>expose all public methods for invocation through
- * {@link StandardOperation#CALL_METHOD} operation;</li>
- * <li>expose all public methods for retrieval for
- * {@link StandardOperation#GET_METHOD} operation; the methods thus retrieved
- * can then be invoked using {@link StandardOperation#CALL}.</li>
- * <li>expose all public fields as properties, unless there are getters or
- * setters for the properties of the same name;</li>
- * <li>expose {@link StandardOperation#GET_LENGTH},
- * {@link StandardOperation#GET_ELEMENT} and {@link StandardOperation#SET_ELEMENT}
- * on native Java arrays, as well as {@link java.util.List} and
- * {@link java.util.Map} objects; ({@link StandardOperation#GET_LENGTH} works on
- * any {@link java.util.Collection});</li>
- * <li>expose a virtual property named {@code length} on Java arrays;</li>
- * <li>expose {@link StandardOperation#NEW} on instances of {@link StaticClass}
- * as calls to constructors, including those static class objects that represent
- * Java arrays (their constructors take a single {@code int} parameter
- * representing the length of the array to create);</li>
- * <li>expose static methods, fields, and properties of classes in a similar
- * manner to how instance method, fields, and properties are exposed, on
- * {@link StaticClass} objects.</li>
- * <li>expose a virtual property named {@code static} on instances of
- * {@link java.lang.Class} to access their {@link StaticClass}.</li>
- * </ul>
- * <p><strong>Overloaded method resolution</strong> is performed automatically
- * for property setters, methods, and constructors. Additionally, manual
- * overloaded method selection is supported by having a call site specify a name
- * for a method that contains an explicit signature, i.e.
- * {@code NamedMethod(GET_METHOD, "parseInt(String,int)")}. You can use
- * non-qualified class names in such signatures regardless of those classes'
- * packages, they will match any class with the same non-qualified name. You
- * only have to use a fully qualified class name in case non-qualified class
- * names would cause selection ambiguity (that is extremely rare). Overloaded
- * resolution for constructors is not automatic as there is no logical place to
- * attach that functionality to but if a language wishes to provide this
- * functionality, it can use {@link #getConstructorMethod(Class, String)} as a
- * useful building block for it.</p>
- * <p><strong>Variable argument invocation</strong> is handled for both methods
- * and constructors.</p>
- * <p><strong>Caller sensitive methods</strong> can be linked as long as they
- * are otherwise public and link requests have call site descriptors carrying
- * full-strength {@link Lookup} objects and not weakened lookups or the public
- * lookup.</p>
- * <p>The class also exposes various static methods for discovery of available
- * property and method names on classes and class instances, as well as access
- * to per-class linkers using the {@link #getLinkerForClass(Class)}
- * method.</p>
- */
-public class BeansLinker implements GuardingDynamicLinker {
- private static final ClassValue<TypeBasedGuardingDynamicLinker> linkers = new ClassValue<TypeBasedGuardingDynamicLinker>() {
- @Override
- protected TypeBasedGuardingDynamicLinker computeValue(final Class<?> clazz) {
- // If ClassValue.put() were public, we could just pre-populate with these known mappings...
- return
- clazz == Class.class ? new ClassLinker() :
- clazz == StaticClass.class ? new StaticClassLinker() :
- DynamicMethod.class.isAssignableFrom(clazz) ? new DynamicMethodLinker() :
- new BeanLinker(clazz);
- }
- };
-
- /**
- * Creates a new beans linker.
- */
- public BeansLinker() {
- }
-
- /**
- * Returns a bean linker for a particular single class. Useful when you need
- * to override or extend the behavior of linking for some classes in your
- * language runtime's linker, but still want to delegate to the default
- * behavior in some cases.
- * @param clazz the class
- * @return a bean linker for that class
- */
- public static TypeBasedGuardingDynamicLinker getLinkerForClass(final Class<?> clazz) {
- return linkers.get(clazz);
- }
-
- /**
- * Returns true if the object is a Java dynamic method (e.g., one
- * obtained through a {@code GET_METHOD} operation on a Java object or
- * {@link StaticClass} or through
- * {@link #getConstructorMethod(Class, String)}.
- *
- * @param obj the object we want to test for being a Java dynamic method.
- * @return true if it is a dynamic method, false otherwise.
- */
- public static boolean isDynamicMethod(final Object obj) {
- return obj instanceof DynamicMethod;
- }
-
- /**
- * Returns true if the object is a Java constructor (obtained through
- * {@link #getConstructorMethod(Class, String)}}.
- *
- * @param obj the object we want to test for being a Java constructor.
- * @return true if it is a constructor, false otherwise.
- */
- public static boolean isDynamicConstructor(final Object obj) {
- return obj instanceof DynamicMethod && ((DynamicMethod)obj).isConstructor();
- }
-
- /**
- * Return the dynamic method of constructor of the given class and the given
- * signature. This method is useful for exposing a functionality for
- * selecting an overloaded constructor based on an explicit signature, as
- * this functionality is not otherwise exposed by Dynalink as
- * {@link StaticClass} objects act as overloaded constructors without
- * explicit signature selection. Example usage would be:
- * {@code getConstructorMethod(java.awt.Color.class, "int, int, int")}.
- * @param clazz the class
- * @param signature full signature of the constructor. Note how you can use
- * names of primitive types, array names with normal Java notation (e.g.
- * {@code "int[]"}), and normally you can even use unqualified class names
- * (e.g. {@code "String, List"} instead of
- * {@code "java.lang.String, java.util.List"} as long as they don't cause
- * ambiguity in the specific parameter position.
- * @return dynamic method for the constructor or null if no constructor with
- * the specified signature exists.
- */
- public static Object getConstructorMethod(final Class<?> clazz, final String signature) {
- return StaticClassLinker.getConstructorMethod(clazz, signature);
- }
-
- /**
- * Returns a set of names of all readable instance properties of a class.
- * @param clazz the class
- * @return a set of names of all readable instance properties of a class.
- */
- public static Set<String> getReadableInstancePropertyNames(final Class<?> clazz) {
- final TypeBasedGuardingDynamicLinker linker = getLinkerForClass(clazz);
- if(linker instanceof BeanLinker) {
- return ((BeanLinker)linker).getReadablePropertyNames();
- }
- return Collections.emptySet();
- }
-
- /**
- * Returns a set of names of all writable instance properties of a class.
- * @param clazz the class
- * @return a set of names of all writable instance properties of a class.
- */
- public static Set<String> getWritableInstancePropertyNames(final Class<?> clazz) {
- final TypeBasedGuardingDynamicLinker linker = getLinkerForClass(clazz);
- if(linker instanceof BeanLinker) {
- return ((BeanLinker)linker).getWritablePropertyNames();
- }
- return Collections.emptySet();
- }
-
- /**
- * Returns a set of names of all instance methods of a class.
- * @param clazz the class
- * @return a set of names of all instance methods of a class.
- */
- public static Set<String> getInstanceMethodNames(final Class<?> clazz) {
- final TypeBasedGuardingDynamicLinker linker = getLinkerForClass(clazz);
- if(linker instanceof BeanLinker) {
- return ((BeanLinker)linker).getMethodNames();
- }
- return Collections.emptySet();
- }
-
- /**
- * Returns a set of names of all readable static properties of a class.
- * @param clazz the class
- * @return a set of names of all readable static properties of a class.
- */
- public static Set<String> getReadableStaticPropertyNames(final Class<?> clazz) {
- return StaticClassLinker.getReadableStaticPropertyNames(clazz);
- }
-
- /**
- * Returns a set of names of all writable static properties of a class.
- * @param clazz the class
- * @return a set of names of all writable static properties of a class.
- */
- public static Set<String> getWritableStaticPropertyNames(final Class<?> clazz) {
- return StaticClassLinker.getWritableStaticPropertyNames(clazz);
- }
-
- /**
- * Returns a set of names of all static methods of a class.
- * @param clazz the class
- * @return a set of names of all static methods of a class.
- */
- public static Set<String> getStaticMethodNames(final Class<?> clazz) {
- return StaticClassLinker.getStaticMethodNames(clazz);
- }
-
- @Override
- public GuardedInvocation getGuardedInvocation(final LinkRequest request, final LinkerServices linkerServices)
- throws Exception {
- final Object receiver = request.getReceiver();
- if(receiver == null) {
- // Can't operate on null
- return null;
- }
- return getLinkerForClass(receiver.getClass()).getGuardedInvocation(request, linkerServices);
- }
-}