diff -r 5198affdb915 -r d382dacfd73f rt/emul/compact/src/main/java/java/util/EventListenerProxy.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/rt/emul/compact/src/main/java/java/util/EventListenerProxy.java Tue Feb 26 16:54:16 2013 +0100 @@ -0,0 +1,75 @@ +/* + * 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 + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package java.util; + +/** + * An abstract wrapper class for an {@code 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 {@code 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 {@code PropertyChangeListeners} + * which are also {@code 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 T listener; + + /** + * Creates a proxy for the specified listener. + * + * @param listener the listener object + */ + public EventListenerProxy(T listener) { + this.listener = listener; + } + + /** + * Returns the listener associated with the proxy. + * + * @return the listener associated with the proxy + */ + public T getListener() { + return this.listener; + } +}