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java.beans

Class PropertyChangeListenerProxy

Implemented Interfaces:
EventListener, PropertyChangeListener
public class PropertyChangeListenerProxy
extends EventListenerProxy
implements PropertyChangeListener
This class provides an extension to PropertyChangeListener - associating a name with the listener. This can be used to filter the changes that one is interested in.
Since:
1.4

Constructor Summary

PropertyChangeListenerProxy(String propertyName, PropertyChangeListener listener)
Create a new proxy which filters property change events and only passes changes to the named property on to the delegate.

Method Summary

String
getPropertyName()
Gets the name of the property this proxy is filtering on.
void
propertyChange(PropertyChangeEvent event)
Forwards the event on to the delegate if the property name matches.

Methods inherited from class java.util.EventListenerProxy

getListener

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

PropertyChangeListenerProxy

public PropertyChangeListenerProxy(String propertyName,
                                   PropertyChangeListener listener)
Create a new proxy which filters property change events and only passes changes to the named property on to the delegate. A null propertyName or listener does not fail now, but may cause a NullPointerException down the road.
Parameters:
propertyName - the property's name to filter on
listener - the delegate listener

Method Details

getPropertyName

public String getPropertyName()
Gets the name of the property this proxy is filtering on.
Returns:
the property name

propertyChange

public void propertyChange(PropertyChangeEvent event)
Forwards the event on to the delegate if the property name matches.
Specified by:
propertyChange in interface PropertyChangeListener
Parameters:
event - the event to pass on, if it meets the filter
Throws:
NullPointerException - if the delegate this was created with is null
PropertyChangeListenerProxy.java -- adds a name to a property listener Copyright (C) 2002, 2005 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

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