1/*
2 * Copyright (C) 2013 Google Inc.
3 * Licensed to The Android Open Source Project.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17package com.android.mail.preferences;
18
19/**
20 * Holds a {@link PreferenceMigratorCreator} to be used for migrating preferences.
21 */
22public class PreferenceMigratorHolder {
23    public interface PreferenceMigratorCreator {
24        BasePreferenceMigrator createPreferenceMigrator();
25    }
26
27    private static PreferenceMigratorCreator sCreator;
28
29    public static void setPreferenceMigratorCreator(final PreferenceMigratorCreator creator) {
30        sCreator = creator;
31    }
32
33    public static BasePreferenceMigrator createPreferenceMigrator() {
34        if (sCreator != null) {
35            return sCreator.createPreferenceMigrator();
36        } else {
37            return null;
38        }
39    }
40}
41