org.progeeks.util
Class WeakPropertyChangeListener

java.lang.Object
  org.progeeks.util.WeakPropertyChangeListener

All Implemented Interfaces:

java.beans.PropertyChangeListener, java.util.EventListener

public class WeakPropertyChangeListener
extends java.lang.Object
implements java.beans.PropertyChangeListener

Property change listener that holds weak reference to a delegate property change listener. If the weak reference becomes null (meaning the delegate has been GC'ed) then this listener will remove itself from any beans that it receives events from. It isn't perfect, but it's a lot better than nothing... and presumably beans that no longer send out events probably don't care if their listeners weren't properly cleaned up.

Version:

$Revision: 1.2 $

Author:

Paul Speed

Constructor Summary

WeakPropertyChangeListener(java.beans.PropertyChangeListener delegate)

Method Summary

void	propertyChange(java.beans.PropertyChangeEvent event)
protected void	removeFromSource(java.beans.PropertyChangeEvent event) Method that can be subclassed to provide additional remove support.

Methods inherited from class java.lang.Object

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

Constructor Detail

WeakPropertyChangeListener

public WeakPropertyChangeListener(java.beans.PropertyChangeListener delegate)

Method Detail

removeFromSource

protected void removeFromSource(java.beans.PropertyChangeEvent event)

Method that can be subclassed to provide additional remove support. Default implementation only supports StandardBeans.

propertyChange

public void propertyChange(java.beans.PropertyChangeEvent event)

Specified by:

propertyChange in interface java.beans.PropertyChangeListener