Module io.github.mmm.event

Package io.github.mmm.event

Class EventSourceAdapter<E,L extends EventListener<?>>

java.lang.Object

io.github.mmm.event.EventSourceAdapter<E,L>

Type Parameters:

E - the type of the events to send.

L - the type of the listeners.

public abstract class EventSourceAdapter<E,L extends EventListener<?>>
extends Object

Adapter for EventSource.

Since:

1.0.0

See Also:

• EventSource
• AbstractEventSource

Method Summary

Modifier and Type	Method	Description
abstract EventSourceAdapter<E,L>	addListener(EventListener<? super E> listener)
static <E, L extends EventListener<?>> EventSourceAdapter<E,L>	empty()
abstract boolean	fireEvent(E event)
abstract L	getListener(int index)
abstract int	getListenerCount()
abstract EventListener<? super E>	getRawListener(int index)
boolean	hasListeners()
abstract EventSourceAdapter<E,L>	removeListener(EventListener<? super E> listener)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

addListener

public abstract EventSourceAdapter<E,L> addListener(EventListener<? super E> listener)

Parameters:

listener - - see EventSource.addListener(EventListener).

Returns:

this adapter itself or a new instance capable to handle more listeners.

removeListener

public abstract EventSourceAdapter<E,L> removeListener(EventListener<? super E> listener)

Parameters:

listener - - see EventSource.removeListener(EventListener).

Returns:

null if the given EventListener was not registered and nothing changed, otherwise this adapter itself or a new instance capable to handle less listeners.

fireEvent

public abstract boolean fireEvent(E event)

Parameters:

event - the event to send to all registered EventListeners.

Returns:

true if the event has actually been dispatched, false otherwise (no listener was registered for the event).

hasListeners

public boolean hasListeners()

Returns:

true if at least one EventListener is registered, false otherwise.

getListenerCount

public abstract int getListenerCount()

Returns:

the number of registered EventListeners.

getListener

public abstract L getListener(int index)

Parameters:

index - the index of the requested EventListener in the range from 0 to getListenerCount() - 1.

Returns:

the requested EventListener or null if index is out of bounds.

getRawListener

public abstract EventListener<? super E> getRawListener(int index)

Parameters:

index - the index of the requested EventListener in the range from 0 to getListenerCount() - 1.

Returns:

the requested EventListener or null if index is out of bounds.

empty

public static <E,
L extends EventListener<?>>
EventSourceAdapter<E,L> empty()

Type Parameters:

E - the type of the events to send.

L - the type of the listeners.

Returns:

the empty EventSourceAdapter.