content: /*
   * Copyright (C) 2017 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 com.android.server.backup.restore;
  
  import android.content.pm.IPackageDeleteObserver;
  import android.os.RemoteException;
  
  import com.android.internal.annotations.GuardedBy;
  
  import java.util.concurrent.atomic.AtomicBoolean;
  
  /**
   * Synchronous implementation of IPackageDeleteObserver.Stub.
   *
   * Allows the caller to synchronously wait for package deleted event.
   */
  public class RestoreDeleteObserver extends IPackageDeleteObserver.Stub {
  
      @GuardedBy("mDone")
      private final AtomicBoolean mDone = new AtomicBoolean();
  
      public RestoreDeleteObserver() {
      }
  
      /**
       * Resets the observer to prepare for another removal.
       */
      public void reset() {
          synchronized (mDone) {
              mDone.set(false);
          }
      }
  
      /**
       * Synchronously waits for completion.
       */
      public void waitForCompletion() {
          synchronized (mDone) {
              while (mDone.get() == false) {
                  try {
                      mDone.wait();
                  } catch (InterruptedException e) {
                  }
              }
          }
      }
  
      @Override
      public void packageDeleted(String packageName, int returnCode) throws RemoteException {
          synchronized (mDone) {
              mDone.set(true);
              mDone.notifyAll();
          }
      }
  }
  