Room kotlin
// Annotates class to be a Room Database with a table (entity) of the Word class @Database(entities = arrayOf(Word::class), version = 1, exportSchema = false) public abstract class WordRoomDatabase : RoomDatabase() { abstract fun wordDao(): WordDao companion object { // Singleton prevents multiple instances of database opening at the // same time. @Volatile private var INSTANCE: WordRoomDatabase? = null fun getDatabase(context: Context): WordRoomDatabase { val tempInstance = INSTANCE if (tempInstance != null) { return tempInstance } synchronized(this) { val instance = Room.databaseBuilder( context.applicationContext, WordRoomDatabase::class.java, "word_database" ).build() INSTANCE = instance return instance } } } }
