Class EventListenerProxy<T extends EventListener>

java.lang.Object
java.util.EventListenerProxy<T>
Type Parameters:
T - the type of EventListener being wrapped
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

    Constructors
    Constructor
    Description
    EventListenerProxy(T listener)
    Creates a proxy for the specified listener.

  • Method Summary

    Modifier and Type
    Method
    Description
    T
    getListener()
    Returns the listener associated with the proxy.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • EventListenerProxy

      public EventListenerProxy(T listener)
      Creates a proxy for the specified listener.
      Parameters:
      listener - the listener object

  • Method Details

    • getListener

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