| /* |
| * 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.util.Slog; |
| |
| public class PermissionBackupHelper extends BlobBackupHelper { |
| private static final String TAG = "PermissionBackup"; |
| private static final boolean DEBUG = false; |
| |
| // current schema of the backup state blob |
| private static final int STATE_VERSION = 1; |
| |
| // key under which the permission-grant state blob is committed to backup |
| private static final String KEY_PERMISSIONS = "permissions"; |
| |
| private final int mUserId; |
| |
| public PermissionBackupHelper(int userId) { |
| super(STATE_VERSION, KEY_PERMISSIONS); |
| |
| mUserId = userId; |
| } |
| |
| @Override |
| protected byte[] getBackupPayload(String key) { |
| IPackageManager pm = AppGlobals.getPackageManager(); |
| if (DEBUG) { |
| Slog.d(TAG, "Handling backup of " + key); |
| } |
| try { |
| switch (key) { |
| case KEY_PERMISSIONS: |
| return pm.getPermissionGrantBackup(mUserId); |
| |
| 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 { |
| switch (key) { |
| case KEY_PERMISSIONS: |
| pm.restorePermissionGrants(payload, mUserId); |
| break; |
| |
| default: |
| Slog.w(TAG, "Unexpected restore key " + key); |
| } |
| } catch (Exception e) { |
| Slog.w(TAG, "Unable to restore key " + key); |
| } |
| } |
| } |