/*
 * Copyright (C) 2013 Google Inc.
 * Licensed to 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.mail.preferences;

/**
 * Holds a {@link PreferenceMigratorCreator} to be used for migrating preferences.
 */
public class PreferenceMigratorHolder {
    public interface PreferenceMigratorCreator {
        BasePreferenceMigrator createPreferenceMigrator();
    }

    private static PreferenceMigratorCreator sCreator;

    public static void setPreferenceMigratorCreator(final PreferenceMigratorCreator creator) {
        sCreator = creator;
    }

    public static BasePreferenceMigrator createPreferenceMigrator() {
        if (sCreator != null) {
            return sCreator.createPreferenceMigrator();
        } else {
            return null;
        }
    }
}