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  */
17 package com.android.mail.preferences;
18 
19 /**
20  * Holds a {@link PreferenceMigratorCreator} to be used for migrating preferences.
21  */
22 public class PreferenceMigratorHolder {
23     public interface PreferenceMigratorCreator {
createPreferenceMigrator()24         BasePreferenceMigrator createPreferenceMigrator();
25     }
26 
27     private static PreferenceMigratorCreator sCreator;
28 
setPreferenceMigratorCreator(final PreferenceMigratorCreator creator)29     public static void setPreferenceMigratorCreator(final PreferenceMigratorCreator creator) {
30         sCreator = creator;
31     }
32 
createPreferenceMigrator()33     public static BasePreferenceMigrator createPreferenceMigrator() {
34         if (sCreator != null) {
35             return sCreator.createPreferenceMigrator();
36         } else {
37             return null;
38         }
39     }
40 }
41