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
17import java.lang.reflect.InvocationHandler;
18import java.lang.reflect.InvocationTargetException;
19import java.lang.reflect.Method;
20import 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 */
26public 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.err.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.err.println("Clash did not throw expected exception");
45        } catch (IllegalArgumentException iae) {
46            System.out.println("Clash threw expected exception");
47        }
48    }
49}
50
51interface Interface1A {
52    public int thisIsOkay();
53
54    public float thisIsTrouble();
55}
56
57interface Interface1B {
58    public int thisIsOkay();
59
60    public Object thisIsTrouble();
61}
62
63class 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