1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.server;
18
19import java.util.List;
20
21/**
22 * Runtime bridge between the Backup Manager Service and the App Widget Service,
23 * since those two modules are intentionally decoupled for modularity.
24 *
25 * @hide
26 */
27public class AppWidgetBackupBridge {
28    private static WidgetBackupProvider sAppWidgetService;
29
30    public static void register(WidgetBackupProvider instance) {
31        sAppWidgetService = instance;
32    }
33
34    public static List<String> getWidgetParticipants(int userId) {
35        return (sAppWidgetService != null)
36                ? sAppWidgetService.getWidgetParticipants(userId)
37                : null;
38    }
39
40    public static byte[] getWidgetState(String packageName, int userId) {
41        return (sAppWidgetService != null)
42                ? sAppWidgetService.getWidgetState(packageName, userId)
43                : null;
44    }
45
46    public static void restoreStarting(int userId) {
47        if (sAppWidgetService != null) {
48            sAppWidgetService.restoreStarting(userId);
49        }
50    }
51
52    public static void restoreWidgetState(String packageName, byte[] restoredState, int userId) {
53        if (sAppWidgetService != null) {
54            sAppWidgetService.restoreWidgetState(packageName, restoredState, userId);
55        }
56    }
57
58    public static void restoreFinished(int userId) {
59        if (sAppWidgetService != null) {
60            sAppWidgetService.restoreFinished(userId);
61        }
62    }
63}
64