15d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao/* 25d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * Copyright (C) 2008 The Android Open Source Project 35d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * 45d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * Licensed under the Apache License, Version 2.0 (the "License"); 55d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * you may not use this file except in compliance with the License. 65d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * You may obtain a copy of the License at 75d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * 85d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * http://www.apache.org/licenses/LICENSE-2.0 95d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * 105d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * Unless required by applicable law or agreed to in writing, software 115d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * distributed under the License is distributed on an "AS IS" BASIS, 125d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 135d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * See the License for the specific language governing permissions and 145d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * limitations under the License. 155d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao */ 165d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao 175d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhaoimport java.lang.reflect.InvocationHandler; 185d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhaoimport java.lang.reflect.InvocationTargetException; 195d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhaoimport java.lang.reflect.Method; 205d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhaoimport java.lang.reflect.Proxy; 215d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao 225d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao/* 235d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * Try to instantiate a proxy class with interfaces that have conflicting 245d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao * duplicate methods (primitive vs. object). 255d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao */ 265d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhaopublic class Clash { 275d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao public static void main(String[] args) { 285d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao InvocationHandler handler = new ClashInvocationHandler(); 295d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao 305d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao /* try passing in the same interface twice */ 315d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao try { 325d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao Proxy.newProxyInstance(Clash.class.getClassLoader(), 335d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao new Class[] { Interface1A.class, Interface1A.class }, 345d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao handler); 355d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao System.err.println("Dupe did not throw expected exception"); 365d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao } catch (IllegalArgumentException iae) { 375d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao System.out.println("Dupe threw expected exception"); 385d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao } 395d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao 405d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao try { 415d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao Proxy.newProxyInstance(Clash.class.getClassLoader(), 425d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao new Class[] { Interface1A.class, Interface1B.class }, 435d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao handler); 445d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao System.err.println("Clash did not throw expected exception"); 455d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao } catch (IllegalArgumentException iae) { 465d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao System.out.println("Clash threw expected exception"); 475d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao } 485d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao } 495d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao} 505d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao 515d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhaointerface Interface1A { 525d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao public int thisIsOkay(); 535d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao 545d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao public float thisIsTrouble(); 555d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao} 565d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao 575d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhaointerface Interface1B { 585d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao public int thisIsOkay(); 595d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao 605d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao public Object thisIsTrouble(); 615d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao} 625d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao 635d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhaoclass ClashInvocationHandler implements InvocationHandler { 645d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao /* don't really need to do anything -- should never get this far */ 655d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao public Object invoke(Object proxy, Method method, Object[] args) 665d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao throws Throwable { 675d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao 685d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao return null; 695d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao } 705d1ac920fdaef5d4ec8f66bb734488cd9660b024jeffhao} 71