1 /* 2 * Copyright 2024 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.photopicker.core.database 18 19 import android.content.Context 20 import com.android.photopicker.PhotopickerApplication 21 import com.android.photopicker.core.banners.BannerStateDao 22 23 /** 24 * This is a prod implementation that relies on an actual backing database. 25 * 26 * @param appContext The application context required to connect to the database. 27 */ 28 class DatabaseManagerImpl(appContext: Context) : DatabaseManager { 29 30 /** 31 * A running database connection to the [PhotopickerDatabase]. This is a wrapper that the room 32 * library puts around the database to manage connection pooling, and read/write access 33 */ 34 private val database: PhotopickerDatabase 35 36 init { 37 // The [PhotopickerDatabase] instance is created during Application#onCreate 38 // so a reference of it can be fetched from the application. 39 val application = appContext as? PhotopickerApplication <lambda>null40 checkNotNull(application) { 41 "PhotopickerApplication context was not provided to DatabaseManager" 42 } 43 database = application.database 44 } 45 46 @Suppress("UNCHECKED_CAST") acquireDaonull47 override fun <T> acquireDao(daoClass: Class<T>): T { 48 with(daoClass) { 49 return when { 50 isAssignableFrom(BannerStateDao::class.java) -> database.bannerStateDao() as T 51 else -> 52 throw IllegalArgumentException( 53 "Cannot acquire ${daoClass.simpleName} from DatabaseManagerImpl" 54 ) 55 } 56 } 57 } 58 } 59