info.bioinfweb.commons.beans

Class PropertyChangeEventForwarder

java.lang.Object

info.bioinfweb.commons.beans.PropertyChangeEventForwarder

All Implemented Interfaces:

java.beans.PropertyChangeListener, java.util.EventListener

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

Delegates PropertyChangeEvents to a collection of other PropertyChangeListeners and optionally adds a prefix to the property name. The source of the delegated events will be identical with the initial source.

One application of this class is delegating property change events from bean objects to their parent objects containing them with an according prefix.

Since:

1.2.0

Author:

Ben Stöver

Constructor Summary

Constructors

Constructor and Description
PropertyChangeEventForwarder(java.lang.String prefix, java.util.Collection<java.beans.PropertyChangeListener> targets) Creates a new instance of this class.
PropertyChangeEventForwarder(java.lang.String prefix, java.beans.PropertyChangeListener target) Creates a new instance of this class.

Method Summary

Modifier and Type	Method and Description
java.lang.String	getPrefix()
java.util.Collection<java.beans.PropertyChangeListener>	getTargets()
void	propertyChange(java.beans.PropertyChangeEvent event)

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyChangeEventForwarder

public PropertyChangeEventForwarder(java.lang.String prefix,
                                    java.util.Collection<java.beans.PropertyChangeListener> targets)

Creates a new instance of this class.

The specified collection will be used directly, i.e. later changes to that collection will automatically be reflected by this instance. (Note that this may lead to a ConcurrentModificationException if that collection is modified in another thread while propertyChange(PropertyChangeEvent) is executed, even if the collection is thread save.)

Parameters:

prefix - the prefix to be add in front of the property name (Maybe null or "".)

targets - the collection of property change listeners to delegate the events to

Throws:

java.lang.NullPointerException - if targets is null

PropertyChangeEventForwarder

public PropertyChangeEventForwarder(java.lang.String prefix,
                                    java.beans.PropertyChangeListener target)

Creates a new instance of this class.

Parameters:

prefix - the prefix to be add in front of the property name (Maybe null or "".)

target - a single property change listener to forward events to (More may be add later.)

Method Detail

getPrefix

public java.lang.String getPrefix()

getTargets

public java.util.Collection<java.beans.PropertyChangeListener> getTargets()

propertyChange

public void propertyChange(java.beans.PropertyChangeEvent event)

Specified by:

propertyChange in interface java.beans.PropertyChangeListener