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29 * An abstract wrapper class for an {@code EventListener} class
30 * which associates a set of additional parameters with the listener.
31 * Subclasses must provide the storage and accessor methods
32 * for the additional arguments or parameters.
34 * For example, a bean which supports named properties
35 * would have a two argument method signature for adding
36 * a {@code PropertyChangeListener} for a property:
38 * public void addPropertyChangeListener(String propertyName,
39 * PropertyChangeListener listener)
41 * If the bean also implemented the zero argument get listener method:
43 * public PropertyChangeListener[] getPropertyChangeListeners()
45 * then the array may contain inner {@code PropertyChangeListeners}
46 * which are also {@code PropertyChangeListenerProxy} objects.
48 * If the calling method is interested in retrieving the named property
49 * then it would have to test the element to see if it is a proxy class.
53 public abstract class EventListenerProxy<T extends EventListener>
54 implements EventListener {
56 private final T listener;
59 * Creates a proxy for the specified listener.
61 * @param listener the listener object
63 public EventListenerProxy(T listener) {
64 this.listener = listener;
68 * Returns the listener associated with the proxy.
70 * @return the listener associated with the proxy
72 public T getListener() {