content: /*
   * Copyright (C) 2015 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.AppGlobals;
  import android.app.backup.BlobBackupHelper;
  import android.content.pm.IPackageManager;
  import android.os.UserHandle;
  import android.util.Slog;
  
  public class PreferredActivityBackupHelper extends BlobBackupHelper {
      private static final String TAG = "PreferredBackup";
      private static final boolean DEBUG = false;
  
      // current schema of the backup state blob
      private static final int STATE_VERSION = 3;
  
      // key under which the preferred-activity state blob is committed to backup
      private static final String KEY_PREFERRED = "preferred-activity";
  
      // key for default-browser [etc] state
      private static final String KEY_DEFAULT_APPS = "default-apps";
  
      // intent-filter verification state
      private static final String KEY_INTENT_VERIFICATION = "intent-verification";
  
      public PreferredActivityBackupHelper() {
          super(STATE_VERSION,
                  KEY_PREFERRED,
                  KEY_DEFAULT_APPS,
                  KEY_INTENT_VERIFICATION);
      }
  
      @Override
      protected byte[] getBackupPayload(String key) {
          IPackageManager pm = AppGlobals.getPackageManager();
          if (DEBUG) {
              Slog.d(TAG, "Handling backup of " + key);
          }
          try {
              // TODO: http://b/22388012
              switch (key) {
                  case KEY_PREFERRED:
                      return pm.getPreferredActivityBackup(UserHandle.USER_SYSTEM);
                  case KEY_DEFAULT_APPS:
                      return pm.getDefaultAppsBackup(UserHandle.USER_SYSTEM);
                  case KEY_INTENT_VERIFICATION:
                      return pm.getIntentFilterVerificationBackup(UserHandle.USER_SYSTEM);
                  default:
                      Slog.w(TAG, "Unexpected backup key " + key);
              }
          } catch (Exception e) {
              Slog.e(TAG, "Unable to store payload " + key);
          }
          return null;
      }
  
      @Override
      protected void applyRestoredPayload(String key, byte[] payload) {
          IPackageManager pm = AppGlobals.getPackageManager();
          if (DEBUG) {
              Slog.d(TAG, "Handling restore of " + key);
          }
          try {
              // TODO: http://b/22388012
              switch (key) {
                  case KEY_PREFERRED:
                      pm.restorePreferredActivities(payload, UserHandle.USER_SYSTEM);
                      break;
                  case KEY_DEFAULT_APPS:
                      pm.restoreDefaultApps(payload, UserHandle.USER_SYSTEM);
                      break;
                  case KEY_INTENT_VERIFICATION:
                      pm.restoreIntentFilterVerification(payload, UserHandle.USER_SYSTEM);
                      break;
                  default:
                      Slog.w(TAG, "Unexpected restore key " + key);
              }
          } catch (Exception e) {
              Slog.w(TAG, "Unable to restore key " + key);
          }
      }
  }
  