import android.content.Context
import androidx.room.Room
import androidx.room.RoomDatabase

abstract class ExampleDB : RoomDatabase() {

    companion object {
        private var INSTANCE: ExampleDB? = null

        @JvmStatic
        fun get(context : Context): ExampleDB {
            if (INSTANCE == null) {
                INSTANCE =
                    Room.databaseBuilder(context, ExampleDB::class.java, "example.db").build()
            }
            return INSTANCE!!
        }

        @JvmStatic
        fun destroyInstance() {
            INSTANCE = null
        }
    }
}