org.appng.api.observe

Interface Observable<T>

Type Parameters:

T - the type which is observed

All Known Subinterfaces:

Document

All Known Implementing Classes:

ObservableDelegate, SimpleDocument

public interface Observable<T>

An Observable can be observed by multiple Observers and notify them of changes by firing an Observable.Event .

Author:

Matthias Müller

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Observable.Event An Observable notifies it's Observers by firing an Observable.Event.

Method Summary

Modifier and Type	Method and Description
boolean	addObserver(Observer<? super T> observer) Adds an Observer.
void	notifyObservers(Observable.Event event) Notifies the Observers.
boolean	removeObserver(Observer<? super T> observer) Removes an Observer.

Method Detail

addObserver

boolean addObserver(Observer<? super T> observer)

Adds an Observer.

Parameters:

observer - the Observer to be added

Returns:

true if adding the Observer was successful, false otherwise

removeObserver

boolean removeObserver(Observer<? super T> observer)

Removes an Observer.

Parameters:

observer - the Observer to be removed

Returns:

true if removing the Observer was successful, false otherwise

notifyObservers

void notifyObservers(Observable.Event event)

Notifies the Observers.

Parameters:

event - an Observable.Event