1 /*
2  * Copyright (C) 2010 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 #ifndef A_HANDLER_REFLECTOR_H_
18 
19 #define A_HANDLER_REFLECTOR_H_
20 
21 #include <media/stagefright/foundation/AHandler.h>
22 
23 namespace android {
24 
25 template<class T>
26 struct AHandlerReflector : public AHandler {
AHandlerReflectorAHandlerReflector27     AHandlerReflector(T *target)
28         : mTarget(target) {
29     }
30 
31 protected:
onMessageReceivedAHandlerReflector32     virtual void onMessageReceived(const sp<AMessage> &msg) {
33         sp<T> target = mTarget.promote();
34         if (target != NULL) {
35             target->onMessageReceived(msg);
36         }
37     }
38 
39 private:
40     wp<T> mTarget;
41 
42     AHandlerReflector(const AHandlerReflector<T> &);
43     AHandlerReflector<T> &operator=(const AHandlerReflector<T> &);
44 };
45 
46 }  // namespace android
47 
48 #endif  // A_HANDLER_REFLECTOR_H_
49