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1 /*
2  * Copyright (C) 2017 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 android.telephony.ims.stub;
18 
19 import android.annotation.SystemApi;
20 import android.os.RemoteException;
21 import android.telephony.ims.ImsExternalCallState;
22 import android.util.Log;
23 
24 import com.android.ims.internal.IImsExternalCallStateListener;
25 import com.android.ims.internal.IImsMultiEndpoint;
26 
27 import java.util.List;
28 import java.util.Objects;
29 
30 /**
31  * Base implementation of ImsMultiEndpoint, which implements stub versions of the methods
32  * in the IImsMultiEndpoint AIDL. Override the methods that your implementation of
33  * ImsMultiEndpoint supports.
34  *
35  * DO NOT remove or change the existing APIs, only add new ones to this Base implementation or you
36  * will break other implementations of ImsMultiEndpoint maintained by other ImsServices.
37  *
38  * @hide
39  */
40 @SystemApi
41 public class ImsMultiEndpointImplBase {
42     private static final String TAG = "MultiEndpointImplBase";
43 
44     private IImsExternalCallStateListener mListener;
45     private final Object mLock = new Object();
46     private final IImsMultiEndpoint mImsMultiEndpoint = new IImsMultiEndpoint.Stub() {
47 
48         @Override
49         public void setListener(IImsExternalCallStateListener listener) throws RemoteException {
50             synchronized (mLock) {
51                 if (mListener != null && !mListener.asBinder().isBinderAlive()) {
52                     Log.w(TAG, "setListener: discarding dead Binder");
53                     mListener = null;
54                 }
55                 if (mListener != null && listener != null && Objects.equals(
56                         mListener.asBinder(), listener.asBinder())) {
57                     return;
58                 }
59 
60                 if (listener == null) {
61                     mListener = null;
62                 } else if (listener != null && mListener == null) {
63                     mListener = listener;
64                 } else {
65                     // Warn that the listener is being replaced while active
66                     Log.w(TAG, "setListener is being called when there is already an active "
67                             + "listener");
68                     mListener = listener;
69                 }
70             }
71         }
72 
73         @Override
74         public void requestImsExternalCallStateInfo() throws RemoteException {
75             ImsMultiEndpointImplBase.this.requestImsExternalCallStateInfo();
76         }
77     };
78 
79     /** @hide */
getIImsMultiEndpoint()80     public IImsMultiEndpoint getIImsMultiEndpoint() {
81         return mImsMultiEndpoint;
82     }
83 
84     /**
85      * Notifies framework when Dialog Event Package update is received
86      *
87      * @throws RuntimeException if the connection to the framework is not available.
88      */
onImsExternalCallStateUpdate(List<ImsExternalCallState> externalCallDialogs)89     public final void onImsExternalCallStateUpdate(List<ImsExternalCallState> externalCallDialogs) {
90         Log.d(TAG, "ims external call state update triggered.");
91         IImsExternalCallStateListener listener;
92         synchronized (mLock) {
93             listener = mListener;
94         }
95         if (listener != null) {
96             try {
97                 listener.onImsExternalCallStateUpdate(externalCallDialogs);
98             } catch (RemoteException e) {
99                 throw new RuntimeException(e);
100             }
101         }
102     }
103 
104     /**
105      * This method should be implemented by the IMS provider. Framework will trigger this to get the
106      * latest Dialog Event Package information. Should
107      */
requestImsExternalCallStateInfo()108     public void requestImsExternalCallStateInfo() {
109         Log.d(TAG, "requestImsExternalCallStateInfo() not implemented");
110     }
111 }
112