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