/*
* Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package java.util;
/**
* 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.
*
* Subclasses of EventListenerProxy may be returned by getListeners() methods
* as a way of associating named properties with their listeners.
*
* 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
*/
public abstract class EventListenerProxy implements EventListener {
private final EventListener listener;
/**
* @param listener The listener object.
*/
public EventListenerProxy(EventListener listener) {
this.listener = listener;
}
/**
* @return The listener associated with this proxy.
*/
public EventListener getListener() {
return listener;
}
}