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.utils;
  
  import static com.android.server.backup.BackupManagerService.TAG;
  
  import android.app.backup.IFullBackupRestoreObserver;
  import android.os.RemoteException;
  import android.util.Slog;
  
  /**
   * Utility methods to communicate with FullBackupRestoreObserver.
   */
  public class FullBackupRestoreObserverUtils {
      /**
       * Wraps {@link IFullBackupRestoreObserver#onStartRestore()} to handle RemoteException, so that
       * the caller doesn't have to.
       *
       * @param observer - IFullBackupRestoreObserver to communicate with.
       * @return observer if the call worked and null if there was a communication problem.
       */
      public static IFullBackupRestoreObserver sendStartRestore(IFullBackupRestoreObserver observer) {
          if (observer != null) {
              try {
                  observer.onStartRestore();
              } catch (RemoteException e) {
                  Slog.w(TAG, "full restore observer went away: startRestore");
                  observer = null;
              }
          }
          return observer;
      }
  
      /**
       * Wraps {@link IFullBackupRestoreObserver#onRestorePackage(String)} to handle RemoteException,
       * so that the caller doesn't have to.
       *
       * @param observer - IFullBackupRestoreObserver to communicate with.
       * @param name - package name.
       * @return observer if the call worked and null if there was a communication problem.
       */
      public static IFullBackupRestoreObserver sendOnRestorePackage(
              IFullBackupRestoreObserver observer, String name) {
          if (observer != null) {
              try {
                  // TODO: use a more user-friendly name string
                  observer.onRestorePackage(name);
              } catch (RemoteException e) {
                  Slog.w(TAG, "full restore observer went away: restorePackage");
                  observer = null;
              }
          }
          return observer;
      }
  
      /**
       * Wraps {@link IFullBackupRestoreObserver#onEndRestore()} ()} to handle RemoteException, so
       * that the caller doesn't have to.
       *
       * @param observer - IFullBackupRestoreObserver to communicate with.
       * @return observer if the call worked and null if there was a communication problem.
       */
      public static IFullBackupRestoreObserver sendEndRestore(IFullBackupRestoreObserver observer) {
          if (observer != null) {
              try {
                  observer.onEndRestore();
              } catch (RemoteException e) {
                  Slog.w(TAG, "full restore observer went away: endRestore");
                  observer = null;
              }
          }
          return observer;
      }
  }
  