1adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/* 2adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Licensed to the Apache Software Foundation (ASF) under one or more 3adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * contributor license agreements. See the NOTICE file distributed with 4adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * this work for additional information regarding copyright ownership. 5adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The ASF licenses this file to You under the Apache License, Version 2.0 6adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * (the "License"); you may not use this file except in compliance with 7adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the License. You may obtain a copy of the License at 8adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 9adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 10adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 11adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Unless required by applicable law or agreed to in writing, software 12adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 13adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * See the License for the specific language governing permissions and 15adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * limitations under the License. 16adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 17adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 18adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectpackage java.lang.reflect; 19adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 20adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport java.io.Serializable; 21adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport java.lang.ref.WeakReference; 22adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport java.util.HashMap; 23adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport java.util.Map; 24adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport java.util.WeakHashMap; 25adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 26adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/** 27adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * {@code Proxy} defines methods for creating dynamic proxy classes and instances. 28adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * A proxy class implements a declared set of interfaces and delegates method 29adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * invocations to an {@code InvocationHandler}. 30adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 31adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see InvocationHandler 32f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * @since 1.3 33adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 34adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectpublic class Proxy implements Serializable { 35adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 36adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project private static final long serialVersionUID = -2222568056686623797L; 37adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 38adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // maps class loaders to created classes by interface names 39adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project private static final Map<ClassLoader, Map<String, WeakReference<Class<?>>>> loaderCache = new WeakHashMap<ClassLoader, Map<String, WeakReference<Class<?>>>>(); 40adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 41adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // to find previously created types 42adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project private static final Map<Class<?>, String> proxyCache = new WeakHashMap<Class<?>, String>(); 43adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 44adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project private static int NextClassNameIndex = 0; 45adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 46adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 47adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The invocation handler on which the method calls are dispatched. 48adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 49adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected InvocationHandler h; 50adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 51adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @SuppressWarnings("unused") 52adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project private Proxy() { 53adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 54adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 55adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 56adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Constructs a new {@code Proxy} instance with the specified invocation 57adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * handler. 58f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 59adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param h 60adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the invocation handler for the newly created proxy 61adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 62adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project protected Proxy(InvocationHandler h) { 63adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project this.h = h; 64adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 65adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 66adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 67adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Returns the dynamically built {@code Class} for the specified interfaces. 68adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Creates a new {@code Class} when necessary. The order of the interfaces 69adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * is relevant. Invocations of this method with the same interfaces but 70adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * different order result in different generated classes. The interfaces 71adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * must be visible from the supplied class loader; no duplicates are 72adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * permitted. All non-public interfaces must be defined in the same package. 73f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 74adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param loader 75adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the class loader that will define the proxy class 76adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param interfaces 77adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * an array of {@code Class} objects, each one identifying an 78adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * interface that will be implemented by the returned proxy 79adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * class 80adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return a proxy class that implements all of the interfaces referred to 81adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * in the contents of {@code interfaces} 82adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IllegalArgumentException 83adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if any of the interface restrictions are violated 84adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws NullPointerException 85adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if either {@code interfaces} or any of its elements are 86adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * {@code null} 87adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 88adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public static Class<?> getProxyClass(ClassLoader loader, 89adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project Class<?>... interfaces) throws IllegalArgumentException { 90adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // check that interfaces are a valid array of visible interfaces 91adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (interfaces == null) { 9286acc043d3334651ee26c65467d78d6cefedd397Kenny Root throw new NullPointerException("interfaces == null"); 93adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 94adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project String commonPackageName = null; 95adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project for (int i = 0, length = interfaces.length; i < length; i++) { 96adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project Class<?> next = interfaces[i]; 97adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (next == null) { 9886acc043d3334651ee26c65467d78d6cefedd397Kenny Root throw new NullPointerException("interfaces[" + i + "] == null"); 99adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 100adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project String name = next.getName(); 101adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (!next.isInterface()) { 102b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new IllegalArgumentException(name + " is not an interface"); 103adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 104adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (loader != next.getClassLoader()) { 105adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project try { 106adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (next != Class.forName(name, false, loader)) { 107b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new IllegalArgumentException(name + 108b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes " is not visible from class loader"); 109adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 110adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } catch (ClassNotFoundException ex) { 111b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new IllegalArgumentException(name + " is not visible from class loader"); 112adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 113adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 114adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project for (int j = i + 1; j < length; j++) { 115adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (next == interfaces[j]) { 116b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new IllegalArgumentException(name + " appears more than once"); 117adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 118adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 119adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (!Modifier.isPublic(next.getModifiers())) { 120adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project int last = name.lastIndexOf('.'); 121f33eae7e84eb6d3b0f4e86b59605bb3de73009f3Elliott Hughes String p = last == -1 ? "" : name.substring(0, last); 122adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (commonPackageName == null) { 123adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project commonPackageName = p; 124adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } else if (!commonPackageName.equals(p)) { 125b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new IllegalArgumentException("non-public interfaces must be " + 126b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes "in the same package"); 127adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 128adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 129adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 130adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 131adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // search cache for matching proxy class using the class loader 132adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project synchronized (loaderCache) { 133adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project Map<String, WeakReference<Class<?>>> interfaceCache = loaderCache 134adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project .get(loader); 135adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (interfaceCache == null) { 136adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project loaderCache 137adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project .put( 138adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project loader, 139adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project (interfaceCache = new HashMap<String, WeakReference<Class<?>>>())); 140adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 141adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 142f33eae7e84eb6d3b0f4e86b59605bb3de73009f3Elliott Hughes String interfaceKey = ""; 143adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (interfaces.length == 1) { 144adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project interfaceKey = interfaces[0].getName(); 145adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } else { 146adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project StringBuilder names = new StringBuilder(); 147adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project for (int i = 0, length = interfaces.length; i < length; i++) { 148adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project names.append(interfaces[i].getName()); 149adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project names.append(' '); 150adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 151adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project interfaceKey = names.toString(); 152adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 153adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 154adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project Class<?> newClass; 155adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project WeakReference<Class<?>> ref = interfaceCache.get(interfaceKey); 156adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (ref == null) { 157f33eae7e84eb6d3b0f4e86b59605bb3de73009f3Elliott Hughes String nextClassName = "$Proxy" + NextClassNameIndex++; 158f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson if (commonPackageName != null && commonPackageName.length() > 0) { 159f33eae7e84eb6d3b0f4e86b59605bb3de73009f3Elliott Hughes nextClassName = commonPackageName + "." + nextClassName; 160adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 161adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (loader == null) { 162adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project loader = ClassLoader.getSystemClassLoader(); 163adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 164fb0ec0e650bf8be35acb0d47da0311a7c446aa33Elliott Hughes newClass = generateProxy(nextClassName.replace('.', '/'), interfaces, loader); 165adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // Need a weak reference to the class so it can 166adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // be unloaded if the class loader is discarded 167fb0ec0e650bf8be35acb0d47da0311a7c446aa33Elliott Hughes interfaceCache.put(interfaceKey, new WeakReference<Class<?>>(newClass)); 168adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project synchronized (proxyCache) { 169adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project // the value is unused 170f33eae7e84eb6d3b0f4e86b59605bb3de73009f3Elliott Hughes proxyCache.put(newClass, ""); 171adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 172adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } else { 173adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project newClass = ref.get(); 174f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson assert newClass != null : "\ninterfaceKey=\"" + interfaceKey + "\"" 175f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson + "\nloaderCache=\"" + loaderCache + "\"" 176f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson + "\nintfCache=\"" + interfaceCache + "\"" 177f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson + "\nproxyCache=\"" + proxyCache + "\""; 178adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 179adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return newClass; 180adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 181adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 182adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 183adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 184adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Returns an instance of the dynamically built class for the specified 185adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * interfaces. Method invocations on the returned instance are forwarded to 186adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the specified invocation handler. The interfaces must be visible from the 187adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * supplied class loader; no duplicates are permitted. All non-public 188adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * interfaces must be defined in the same package. 189f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 190adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param loader 191adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the class loader that will define the proxy class 192adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param interfaces 193adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * an array of {@code Class} objects, each one identifying an 194adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * interface that will be implemented by the returned proxy 195adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * object 196adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param h 197adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the invocation handler that handles the dispatched method 198adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * invocations 199adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return a new proxy object that delegates to the handler {@code h} 200adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IllegalArgumentException 201adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if any of the interface restrictions are violated 202adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws NullPointerException 203adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if the interfaces or any of its elements are null 204adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 205adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public static Object newProxyInstance(ClassLoader loader, 206adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project Class<?>[] interfaces, InvocationHandler h) 207adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throws IllegalArgumentException { 208adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (h == null) { 20986acc043d3334651ee26c65467d78d6cefedd397Kenny Root throw new NullPointerException("h == null"); 210adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 211adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project try { 212adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return getProxyClass(loader, interfaces).getConstructor( 213adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project new Class<?>[] { InvocationHandler.class }).newInstance( 214adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project new Object[] { h }); 215adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } catch (NoSuchMethodException ex) { 216adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw (InternalError) (new InternalError(ex.toString()) 217adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project .initCause(ex)); 218adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } catch (IllegalAccessException ex) { 219adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw (InternalError) (new InternalError(ex.toString()) 220adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project .initCause(ex)); 221adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } catch (InstantiationException ex) { 222adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw (InternalError) (new InternalError(ex.toString()) 223adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project .initCause(ex)); 224adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } catch (InvocationTargetException ex) { 225adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project Throwable target = ex.getTargetException(); 226adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throw (InternalError) (new InternalError(target.toString()) 227adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project .initCause(target)); 228adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 229adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 230adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 231adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 232adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Indicates whether or not the specified class is a dynamically generated 233adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * proxy class. 234f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 235adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param cl 236adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the class 237adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return {@code true} if the class is a proxy class, {@code false} 238adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * otherwise 239adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws NullPointerException 240adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if the class is {@code null} 241adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 242adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public static boolean isProxyClass(Class<?> cl) { 243adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (cl == null) { 24486acc043d3334651ee26c65467d78d6cefedd397Kenny Root throw new NullPointerException("cl == null"); 245adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 246adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project synchronized (proxyCache) { 247adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return proxyCache.containsKey(cl); 248adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 249adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 250adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 251adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 252adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Returns the invocation handler of the specified proxy instance. 253f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 254adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @param proxy 255adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the proxy instance 256adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @return the invocation handler of the specified proxy instance 257adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IllegalArgumentException 258adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if the supplied {@code proxy} is not a proxy object 259adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 260adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public static InvocationHandler getInvocationHandler(Object proxy) 261adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throws IllegalArgumentException { 262adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 263adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (isProxyClass(proxy.getClass())) { 264adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return ((Proxy) proxy).h; 265adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 266adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 267b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new IllegalArgumentException("not a proxy instance"); 268adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 269adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 270adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project native private static Class generateProxy(String name, Class[] interfaces, 271adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project ClassLoader loader); 272adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 273adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /* 274adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The VM clones this method's descriptor when generating a proxy class. 275adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * There is no implementation. 276adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 277adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project native private static void constructorPrototype(InvocationHandler h); 278adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project} 279