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()
    Creates and returns a copy of this object.
    boolean
    equals(Object obj)
    Indicates whether some other object is "equal to" this one.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    Finalization is deprecated and subject to removal in a future release.
    final Class<?>
    getClass()
    Returns the runtime class of this Object.
    int
    hashCode()
    Returns a hash code value for this object.
    final void
    notify()
    Wakes up a single thread that is waiting on this object's monitor.
    final void
    notifyAll()
    Wakes up all threads that are waiting on this object's monitor.
    String
    toString()
    Returns a string representation of the object.
    final void
    wait()
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
    final void
    wait(long timeoutMillis)
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
    final void
    wait(long timeoutMillis, int nanos)
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

  • 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