Package-level declarations

// Obtaining KQLiteCursor, it is also an Iterator. 
val cursor: KQLiteCursor = TblContact.quickSelect()

// Converting KQLiteCursor to Sequence for more features
val sequence: Sequence<KQLiteCursor> = cursor.asSequence()


// Getting row count from KQLiteCursor
val count: Int = cursor.asSequence().count()


// Mapping KQLiteCursor to list of entities, TblContact implements KQLiteAdapter
val contactList: List<Contact> = cursor.mapToList(TblContact::mapper)


// Reading single row. Throws Exception if count() != 1
val singleContact: Contact = cursor.mapToSingle(TblContact::mapper)


// Reading single item or null
val nullableContact: Contact? = cursor.mapToSingleOrNull(TblContact::mapper)


// KQLiteCursor custom mapping
val nameList: List<String> = cursor.mapToList { it[TblContact.firstName] }


// Converting KQLiteCursor to Flow. It does not observe table changes.
val flow: Flow<KQLiteCursor> = cursor.asFlow()


// Mapping Flow to other types
val nameFlow: Flow<String> = cursor.asFlow().map { it[TblContact.firstName] }


// Converting KQLiteCursor to CallbackFlow. Observe table changes INSERT, UPDATE and DELETE.
val callbackFlow: Flow<KQLiteCursor> = cursor.asCallbackFlow()


// Mapping Flow to List of observable entities.
val contactsFlow: Flow<List<Contact>> =
    cursor.asCallbackFlow().mapToList(mapper = TblContact::mapper)


// Custom dispatcher, default is IO, if not given.
val dispatcher: Flow<List<Contact>> =
    cursor.asCallbackFlow().mapToList(Dispatchers.Main, TblContact::mapper)


// Observable Flow of nullable item.
val singleFlow: Flow<Contact?> =
    cursor.asCallbackFlow().mapToSingleOrNull(mapper = TblContact::mapper)