alchemist-api/it.unibo.alchemist.model.observation/ObservableList

ObservableList

interface ObservableList<T> : Observable<List<T>> (source)

An observable list whose read-only snapshot is available through current, with observable size.

Properties

abstract val current: List<T>

The current state or value of the observable.

open val isObserved: Boolean

Whether any callback is currently registered.

abstract val observerCount: Int

How many callbacks are currently registered.

abstract val size: Observable<Int>

Emits the list size whenever it changes.

Functions

abstract override fun dispose()

Unregisters every callback registered with this observable.

abstract fun <S> map(transform: (List<T>) -> S): Observable<S>

Transforms the current observable into a new observable by applying the specified transformation function to its emitted values.

abstract fun <O, R> mergeWith(other: Observable<O>, merge: (List<T>, O) -> R): Observable<R>

Combines the current observable with another observable, producing a new observable that emits values derived by applying the provided merge function to the current values of both observables.

abstract fun onChange(notifyOnRegistration: Boolean = true, callback: (List<T>) -> Unit): Disposable

Registers callback to be invoked with every new value of this observable, and right away with the current one if notifyOnRegistration.