com.robopupu.api.util

Interface Listenable<T_Listener>

All Known Subinterfaces:

ObservableModel<T_Event,T_Observer>

All Known Implementing Classes:

AbstractListenable, AbstractObservableModel

public interface Listenable<T_Listener>

Listenable defines an interface for objects that can have listeners for listening their events. A concrete implementation of Listenable can be annotated using Listenable.Singled annotation to allow only one listener.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Listenable.Singled

Method Summary

Modifier and Type	Method and Description
boolean	addListener(T_Listener listener)
int	getListenerCount()
java.util.List<T_Listener>	getListeners()
T_Listener	getSingleListener() Return a single listener if there is only one listener.
boolean	hasAnyListeners()
boolean	isSingled() Test if this Listenable is annotated with Listenable.Singled to indicate that this Listenable is allowed to have at most a single listener.
void	removeAllListeners()
boolean	removeListener(T_Listener listener)

Method Detail

getSingleListener

T_Listener getSingleListener()

Return a single listener if there is only one listener. Otherwise throws a IllegalStateException

Returns:

A listener.

getListeners

java.util.List<T_Listener> getListeners()

getListenerCount

int getListenerCount()

addListener

boolean addListener(T_Listener listener)

removeListener

boolean removeListener(T_Listener listener)

removeAllListeners

void removeAllListeners()

hasAnyListeners

boolean hasAnyListeners()

isSingled

boolean isSingled()

Test if this Listenable is annotated with Listenable.Singled to indicate that this Listenable is allowed to have at most a single listener.

Returns:

A boolean value.