/*
 * 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) 2006-2010. All Rights Reserved.
 *
 * Contributor(s): Nathan L. Fiedler.
 *
 * $Id: DefaultExpressionWatch.java 285 2010-11-20 23:56:08Z nathanfiedler $
 */
package com.bluemarsh.jswat.core.watch;

/**
 * A default implementation of the ExpressionWatch interface.
 *
 * @author Nathan Fiedler
 */
public class DefaultExpressionWatch extends AbstractWatch
        implements ExpressionWatch {

    /** Name of 'expression' property. */
    public static final String PROP_EXPRESSION = "expression";
    /** The expression being watched. */
    private String expression;

    /**
     * Creates a new instance of DefaultExpressionWatch.
     */
    public DefaultExpressionWatch() {
    }

    @Override
    public String getExpression() {
        return expression;
    }

    @Override
    public void setExpression(String expr) {
        String old = expression;
        expression = expr;
        propSupport.firePropertyChange(PROP_EXPRESSION, old, expression);
    }
}