/*
 * The contents of this file are subject to the terms of the Common Development
 * and Distribution License (the License). You may not use this file except in
 * compliance with the License.
 *
 * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
 * or http://www.netbeans.org/cddl.txt.
 *
 * When distributing Covered Code, include this CDDL Header Notice in each file
 * and include the License file at http://www.netbeans.org/cddl.txt.
 * If applicable, add the following below the CDDL Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 *
 * The Original Software is JSwat. The Initial Developer of the Original
 * Software is Nathan L. Fiedler. Portions created by Nathan L. Fiedler
 * are Copyright (C) 2006. All Rights Reserved.
 *
 * Contributor(s): Nathan L. Fiedler.
 *
 * $Id: Watch.java 40 2009-01-09 07:35:28Z nathanfiedler $
 */

package com.bluemarsh.jswat.core.watch;

import java.beans.PropertyChangeListener;

/**
 * A Watch represents all types of watches, including ones based on
 * expressions and those that are fixed objects.
 *
 * @author Nathan Fiedler
 */
public interface Watch {

    /**
     * Add a PropertyChangeListener to the listener list.
     *
     * @param  listener  the PropertyChangeListener to be added.
     */
    void addPropertyChangeListener(PropertyChangeListener listener);

    /**
     * Remove a PropertyChangeListener from the listener list.
     *
     * @param  listener  the PropertyChangeListener to be removed.
     */
    void removePropertyChangeListener(PropertyChangeListener listener);
}