content: /*
   * Copyright (C) 2016 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.accounts.AccountManagerInternal;
  import android.app.backup.BlobBackupHelper;
  import android.os.UserHandle;
  import android.util.Slog;
  import com.android.server.LocalServices;
  
  /**
   * Helper for handling backup of account manager specific state.
   */
  public class AccountManagerBackupHelper extends BlobBackupHelper {
      private static final String TAG = "AccountsBackup";
      private static final boolean DEBUG = false;
  
      // current schema of the backup state blob
      private static final int STATE_VERSION = 1;
  
      // key under which the account access grant state blob is committed to backup
      private static final String KEY_ACCOUNT_ACCESS_GRANTS = "account_access_grants";
  
      public AccountManagerBackupHelper() {
          super(STATE_VERSION, KEY_ACCOUNT_ACCESS_GRANTS);
      }
  
      @Override
      protected byte[] getBackupPayload(String key) {
          AccountManagerInternal am = LocalServices.getService(AccountManagerInternal.class);
          if (DEBUG) {
              Slog.d(TAG, "Handling backup of " + key);
          }
          try {
              switch (key) {
                  case KEY_ACCOUNT_ACCESS_GRANTS: {
                      return am.backupAccountAccessPermissions(UserHandle.USER_SYSTEM);
                  }
  
                  default: {
                      Slog.w(TAG, "Unexpected backup key " + key);
                  }
              }
          } catch (Exception e) {
              Slog.e(TAG, "Unable to store payload " + key);
          }
  
          return new byte[0];
      }
  
      @Override
      protected void applyRestoredPayload(String key, byte[] payload) {
          AccountManagerInternal am = LocalServices.getService(AccountManagerInternal.class);
          if (DEBUG) {
              Slog.d(TAG, "Handling restore of " + key);
          }
          try {
              switch (key) {
                  case KEY_ACCOUNT_ACCESS_GRANTS: {
                      am.restoreAccountAccessPermissions(payload, UserHandle.USER_SYSTEM);
                  } break;
  
                  default: {
                      Slog.w(TAG, "Unexpected restore key " + key);
                  }
              }
          } catch (Exception e) {
              Slog.w(TAG, "Unable to restore key " + key);
          }
      }
  }
  