eventlistenerproxy.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 59 行

/*
 * @(#)EventListenerProxy.java	1.7 06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program 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. 
 * 
 * This program 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 at /legal/license.txt). 
 * 
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions. 
 */

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 EventListerProxy may be returned by getListeners() methods
 * as a way of associating named properties with their listeners.
 *
 * 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;
    }
}