org.ceryle.util.event
Class EventSourceDelegate

java.lang.Object
  org.ceryle.util.event.EventSourceDelegate

All Implemented Interfaces:

EventDelegate

public final class EventSourceDelegate
extends Object
implements EventDelegate

Delegating class that manages event listener registration and removal.

Alternately, rather than use this class you can have all events managed by the EventManager, which also provides an internal implementation of EventDelegate.

Author:

Murray Altheim

Constructor Summary

EventSourceDelegate()

Method Summary

boolean	addChangeListener(ChangeListener listener) Registers an ChangeListener with this instance.
boolean	isListening() Returns true if there are one or more listeners registered with this instance.
boolean	removeChangeListener(ChangeListener listener) Removes an ChangeListener from this instance.

Methods inherited from class java.lang.Object

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

Constructor Detail

EventSourceDelegate

public EventSourceDelegate()

Method Detail

addChangeListener

public final boolean addChangeListener(ChangeListener listener)

Registers an ChangeListener with this instance.

Specified by:

addChangeListener in interface EventDelegate

Parameters:

listener - the event listener

Returns:

true if the listener was added (i.e., it was not already in the list and was added)

removeChangeListener

public final boolean removeChangeListener(ChangeListener listener)

Removes an ChangeListener from this instance.

Specified by:

removeChangeListener in interface EventDelegate

Parameters:

listener - the event listener

Returns:

true if the listener was removed (i.e., it was actually in the list and was removed)

isListening

public boolean isListening()

Returns true if there are one or more listeners registered with this instance.

Specified by:

isListening in interface EventDelegate