content: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.telephony.mbms;
  
  import android.os.Binder;
  
  import java.util.concurrent.Executor;
  
  /** @hide */
  public class InternalGroupCallCallback extends IGroupCallCallback.Stub {
      private final GroupCallCallback mAppCallback;
      private final Executor mExecutor;
      private volatile boolean mIsStopped = false;
  
      public InternalGroupCallCallback(GroupCallCallback appCallback,
              Executor executor) {
          mAppCallback = appCallback;
          mExecutor = executor;
      }
  
      @Override
      public void onError(final int errorCode, final String message) {
          if (mIsStopped) {
              return;
          }
  
          long token = Binder.clearCallingIdentity();
          try {
              mExecutor.execute(new Runnable() {
                  @Override
                  public void run() {
                      mAppCallback.onError(errorCode, message);
                  }
              });
          } finally {
              Binder.restoreCallingIdentity(token);
          }
      }
  
      @Override
      public void onGroupCallStateChanged(final int state, final int reason) {
          if (mIsStopped) {
              return;
          }
  
          long token = Binder.clearCallingIdentity();
          try {
              mExecutor.execute(new Runnable() {
                  @Override
                  public void run() {
                      mAppCallback.onGroupCallStateChanged(state, reason);
                  }
              });
          } finally {
              Binder.restoreCallingIdentity(token);
          }
      }
  
      @Override
      public void onBroadcastSignalStrengthUpdated(final int signalStrength) {
          if (mIsStopped) {
              return;
          }
  
          long token = Binder.clearCallingIdentity();
          try {
              mExecutor.execute(new Runnable() {
                  @Override
                  public void run() {
                      mAppCallback.onBroadcastSignalStrengthUpdated(signalStrength);
                  }
              });
          } finally {
              Binder.restoreCallingIdentity(token);
          }
      }
  
      /** Prevents this callback from calling the app */
      public void stop() {
          mIsStopped = true;
      }
  }
  