1 /* 2 * Copyright (C) 2008 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.InvocationHandler; 18 import java.lang.reflect.InvocationTargetException; 19 import java.lang.reflect.Method; 20 import java.lang.reflect.Proxy; 21 22 /* 23 * Try to instantiate a proxy class with interfaces that have conflicting 24 * duplicate methods (primitive vs. object). 25 */ 26 public class Clash { 27 public static void main(String[] args) { 28 InvocationHandler handler = new ClashInvocationHandler(); 29 30 /* try passing in the same interface twice */ 31 try { 32 Proxy.newProxyInstance(Clash.class.getClassLoader(), 33 new Class<?>[] { Interface1A.class, Interface1A.class }, 34 handler); 35 System.out.println("Dupe did not throw expected exception"); 36 } catch (IllegalArgumentException iae) { 37 System.out.println("Dupe threw expected exception"); 38 } 39 40 try { 41 Proxy.newProxyInstance(Clash.class.getClassLoader(), 42 new Class<?>[] { Interface1A.class, Interface1B.class }, 43 handler); 44 System.out.println("Clash did not throw expected exception"); 45 } catch (IllegalArgumentException iae) { 46 System.out.println("Clash threw expected exception"); 47 } 48 } 49 } 50 51 interface Interface1A { 52 public int thisIsOkay(); 53 54 public float thisIsTrouble(); 55 } 56 57 interface Interface1B { 58 public int thisIsOkay(); 59 60 public Object thisIsTrouble(); 61 } 62 63 class ClashInvocationHandler implements InvocationHandler { 64 /* don't really need to do anything -- should never get this far */ 65 public Object invoke(Object proxy, Method method, Object[] args) 66 throws Throwable { 67 68 return null; 69 } 70 } 71
