edu.washington.cs.supple.util
Class EventDispatcher

java.lang.Object
  edu.washington.cs.supple.util.EventDispatcher

Direct Known Subclasses:

CustomizationRequestEventDispatcher, LearningEventDispatcher

public abstract class EventDispatcher

extends java.lang.Object

Author:

kgajos

Field Summary

protected java.util.Vector

listeners

Constructor Summary

EventDispatcher()

Method Summary

boolean	addListener(java.lang.Object l) Adds a listener
protected abstract void	deliverEvent(java.lang.Object listener, SuppleEvent event)
boolean	hasListeners()
void	postEvent(SuppleEvent event)
boolean	removeListener(java.lang.Object l) Removes a listener

Methods inherited from class java.lang.Object

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

Field Detail

listeners

protected java.util.Vector listeners

Constructor Detail

EventDispatcher

public EventDispatcher()

Method Detail

addListener

public boolean addListener(java.lang.Object l)

Adds a listener

Parameters:

l - listener

Returns:

true if all went well; false if the listener was already subscribed or if it was null

removeListener

public boolean removeListener(java.lang.Object l)

Removes a listener

Parameters:

l - listener

Returns:

true if all went well; false otherwise

hasListeners

public boolean hasListeners()

postEvent

public void postEvent(SuppleEvent event)

deliverEvent

protected abstract void deliverEvent(java.lang.Object listener,
                                     SuppleEvent event)