1 /* 2 * Copyright 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 import java.lang.reflect.Constructor; 18 import java.lang.reflect.InvocationHandler; 19 import java.lang.reflect.Method; 20 import java.lang.reflect.Proxy; 21 22 /** 23 * Tests proxies when used with constructor methods. 24 */ 25 class ConstructorProxy implements InvocationHandler { main()26 public static void main() { 27 try { 28 new ConstructorProxy().runTest(); 29 } catch (Exception e) { 30 System.out.println("Unexpected failure occured"); 31 e.printStackTrace(); 32 } 33 } 34 runTest()35 public void runTest() throws Exception { 36 Class<?> proxyClass = Proxy.getProxyClass( 37 getClass().getClassLoader(), 38 new Class<?>[] { Runnable.class } 39 ); 40 Constructor<?> constructor = proxyClass.getConstructor(InvocationHandler.class); 41 System.out.println("Found constructor."); 42 // We used to crash when asking the exception types of the constructor, because the runtime was 43 // not using the non-proxy ArtMethod 44 Object[] exceptions = constructor.getExceptionTypes(); 45 System.out.println("Found constructors with " + exceptions.length + " exceptions"); 46 } 47 48 @Override invoke(Object proxy, Method method, Object[] args)49 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { 50 return args[0]; 51 } 52 } 53 54