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 com.android.server.backup;
  
  import android.app.backup.BlobBackupHelper;
  import android.app.slice.ISliceManager;
  import android.content.Context;
  import android.os.ServiceManager;
  import android.os.UserHandle;
  import android.util.Log;
  import android.util.Slog;
  
  public class SliceBackupHelper extends BlobBackupHelper {
      static final String TAG = "SliceBackupHelper";
      static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
  
      // Current version of the blob schema
      static final int BLOB_VERSION = 1;
  
      // Key under which the payload blob is stored
      static final String KEY_SLICES = "slices";
  
      public SliceBackupHelper(Context context) {
          super(BLOB_VERSION, KEY_SLICES);
          // context is currently unused
      }
  
      @Override
      protected byte[] getBackupPayload(String key) {
          byte[] newPayload = null;
          if (KEY_SLICES.equals(key)) {
              try {
                  ISliceManager sm = ISliceManager.Stub.asInterface(
                          ServiceManager.getService(Context.SLICE_SERVICE));
                  // TODO: http://b/22388012
                  newPayload = sm.getBackupPayload(UserHandle.USER_SYSTEM);
              } catch (Exception e) {
                  // Treat as no data
                  Slog.e(TAG, "Couldn't communicate with slice manager");
                  newPayload = null;
              }
          }
          return newPayload;
      }
  
      @Override
      protected void applyRestoredPayload(String key, byte[] payload) {
          if (DEBUG) Slog.v(TAG, "Got restore of " + key);
  
          if (KEY_SLICES.equals(key)) {
              try {
                  ISliceManager sm = ISliceManager.Stub.asInterface(
                          ServiceManager.getService(Context.SLICE_SERVICE));
                  // TODO: http://b/22388012
                  sm.applyRestore(payload, UserHandle.USER_SYSTEM);
              } catch (Exception e) {
                  Slog.e(TAG, "Couldn't communicate with slice manager");
              }
          }
      }
  
  }
  