1 /**
2  * Copyright (C) 2022 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 BASE_MANAGER_H
18 #define BASE_MANAGER_H
19 
20 #include <binder/Parcel.h>
21 #include <functional>
22 
23 typedef int (*CBManager)(int sessionId, const android::Parcel& parcel);
24 
25 class BaseManager
26 {
27 public:
28     BaseManager();
29     virtual ~BaseManager();
30 
31     /**
32      * @brief Send message to session to operate
33      *
34      * @param sessionId identification of session
35      * @param parcel parcel of message and parameters
36      */
37     virtual void sendMessage(const int sessionId, const android::Parcel& parcel) = 0;
38 
39     /**
40      * @brief Set the Callback object
41      *
42      * @param pfnCallback
43      */
44     virtual void setCallback(CBManager pfnCallback);
45 
46     /**
47      * @brief Send response message to assigend callback method
48      *
49      * @param sessionId The unique identification of the session
50      * @param parcel The parcel object contains event message and parameter
51      * @return int Returns -1 when it is fail invoke callback function. Returns 1 when it is
52      * success.
53      */
54     virtual int sendResponse(int sessionId, const android::Parcel& parcel);
55 
56 protected:
57     virtual int getState(int sessionId) = 0;
58     std::function<int(int, const android::Parcel&)> mCallback;
59 };
60 
61 #endif