/*

 * Copyright (c) 2000, 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.beans;

import java.util.EventListenerProxy;

/**

 * A class which extends the {@code EventListenerProxy}

 * specifically for adding a {@code PropertyChangeListener}

 * with a "bound" property.

 * Instances of this class can be added

 * as {@code PropertyChangeListener}s to a bean

 * which supports firing property change events.

 * <p>

 * If the object has a {@code getPropertyChangeListeners} method

 * then the array returned could be a mixture of {@code PropertyChangeListener}

 * and {@code PropertyChangeListenerProxy} objects.

 *

 * @see java.util.EventListenerProxy

 * @see PropertyChangeSupport#getPropertyChangeListeners

 * @since 1.4

 */

public class PropertyChangeListenerProxy

        extends EventListenerProxy<PropertyChangeListener>

        implements PropertyChangeListener {

    private final String propertyName;

    /**

     * Constructor which binds the {@code PropertyChangeListener}

     * to a specific property.

     *

     * @param propertyName  the name of the property to listen on

     * @param listener      the listener object

     */

    public PropertyChangeListenerProxy(String propertyName, PropertyChangeListener listener) {

        super(listener);

        this.propertyName = propertyName;

    }

    /**

     * Forwards the property change event to the listener delegate.

     *

     * @param event  the property change event

     */

    public void propertyChange(PropertyChangeEvent event) {

        getListener().propertyChange(event);

    }

    /**

     * Returns the name of the named property associated with the listener.

     *

     * @return the name of the named property associated with the listener

     */

    public String getPropertyName() {

        return this.propertyName;

    }

}