1 /*
2  * Copyright (C) 2019 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 
17 package com.android.car.dialer.storage;
18 
19 import android.content.Context;
20 
21 import androidx.room.Database;
22 import androidx.room.Room;
23 import androidx.room.RoomDatabase;
24 import androidx.room.TypeConverters;
25 
26 /** Defines the database for the {@link FavoriteNumberEntity}s. */
27 @Database(entities = {FavoriteNumberEntity.class}, exportSchema = false, version = 1)
28 @TypeConverters(CipherConverter.class)
29 public abstract class FavoriteNumberDatabase extends RoomDatabase {
30 
31     /** Returns the data access object to interact with the favorite number database. */
favoriteNumberDao()32     public abstract FavoriteNumberDao favoriteNumberDao();
33 
34     private static volatile FavoriteNumberDatabase sFavoriteNumberDatabase;
35 
getDatabase(final Context context)36     static FavoriteNumberDatabase getDatabase(final Context context) {
37         if (sFavoriteNumberDatabase == null) {
38             synchronized (FavoriteNumberDatabase.class) {
39                 if (sFavoriteNumberDatabase == null) {
40                     sFavoriteNumberDatabase = Room.databaseBuilder(context.getApplicationContext(),
41                             FavoriteNumberDatabase.class, "favorite_number_database").build();
42                 }
43             }
44         }
45         return sFavoriteNumberDatabase;
46     }
47 }
48