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Java™ Platform
Standard Ed. 7

DRAFT ea-b118

java.util
Class EventListenerProxy<T extends EventListener>

java.lang.Object
  extended by java.util.EventListenerProxy<T>
All Implemented Interfaces:
EventListener
Direct Known Subclasses:
AWTEventListenerProxy, PropertyChangeListenerProxy, VetoableChangeListenerProxy

public abstract class EventListenerProxy<T extends EventListener>
extends Object
implements EventListener

An abstract wrapper class for an EventListener class which associates a set of additional parameters with the listener. Subclasses must provide the storage and accessor methods for the additional arguments or parameters.

For example, a bean which supports named properties would have a two argument method signature for adding a PropertyChangeListener for a property:

 public void addPropertyChangeListener(String propertyName,
                                       PropertyChangeListener listener)
 
If the bean also implemented the zero argument get listener method:
 public PropertyChangeListener[] getPropertyChangeListeners()
 
then the array may contain inner PropertyChangeListeners which are also PropertyChangeListenerProxy objects.

If the calling method is interested in retrieving the named property then it would have to test the element to see if it is a proxy class.

Since:
1.4

Constructor Summary
Constructor and Description
EventListenerProxy(T listener)
          Creates a proxy for the specified listener.
 
Method Summary
Modifier and Type Method and Description
 T getListener()
          Returns the listener associated with the proxy.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

EventListenerProxy

public EventListenerProxy(T listener)
Creates a proxy for the specified listener.

Parameters:
listener - the listener object
Method Detail

getListener

public T getListener()
Returns the listener associated with the proxy.

Returns:
the listener associated with the proxy

Java™ Platform
Standard Ed. 7

DRAFT ea-b118

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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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DRAFT ea-b118

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