1 /*
2  * Copyright (C) 2012 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 package com.android.dx.mockito;
18 
19 import com.android.dx.stock.ProxyBuilder;
20 
21 import org.mockito.Mockito;
22 import org.mockito.invocation.InvocationFactory.RealMethodBehavior;
23 import org.mockito.invocation.MockHandler;
24 
25 import java.lang.reflect.InvocationHandler;
26 import java.lang.reflect.Method;
27 
28 import static org.mockito.Mockito.withSettings;
29 
30 /**
31  * Handles proxy method invocations to dexmaker's InvocationHandler by calling
32  * a MockitoInvocationHandler.
33  */
34 final class InvocationHandlerAdapter implements InvocationHandler {
35     private MockHandler handler;
36 
InvocationHandlerAdapter(MockHandler handler)37     public InvocationHandlerAdapter(MockHandler handler) {
38         this.handler = handler;
39     }
40 
41     @Override
invoke(final Object proxy, final Method method, final Object[] rawArgs)42     public Object invoke(final Object proxy, final Method method, final Object[] rawArgs)
43             throws Throwable {
44         // args can be null if the method invoked has no arguments, but Mockito expects a non-null array
45         Object[] args = rawArgs != null ? rawArgs : new Object[0];
46         if (isEqualsMethod(method)) {
47             return proxy == args[0];
48         } else if (isHashCodeMethod(method)) {
49             return System.identityHashCode(proxy);
50         }
51 
52         return handler.handle(Mockito.framework().getInvocationFactory().createInvocation(proxy,
53                 withSettings().build(proxy.getClass().getSuperclass()), method,
54                 new RealMethodBehavior() {
55             @Override
56             public Object call() throws Throwable {
57                 return ProxyBuilder.callSuper(proxy, method, rawArgs);
58             }
59         }, args));
60     }
61 
62     public MockHandler getHandler() {
63         return handler;
64     }
65 
66     public void setHandler(MockHandler handler) {
67         this.handler = handler;
68     }
69 
70     private static boolean isEqualsMethod(Method method) {
71         return method.getName().equals("equals")
72                 && method.getParameterTypes().length == 1
73                 && method.getParameterTypes()[0] == Object.class;
74     }
75 
76     private static boolean isHashCodeMethod(Method method) {
77         return method.getName().equals("hashCode")
78                 && method.getParameterTypes().length == 0;
79     }
80 }
81