/core/src/com/bluemarsh/jswat/core/expr/RootNode.java

 1/*
 2 * The contents of this file are subject to the terms of the Common Development
 3 * and Distribution License (the License). You may not use this file except in
 4 * compliance with the License.
 5 *
 6 * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
 7 * or http://www.netbeans.org/cddl.txt.
 8 *
 9 * When distributing Covered Code, include this CDDL Header Notice in each file
10 * and include the License file at http://www.netbeans.org/cddl.txt.
11 * If applicable, add the following below the CDDL Header, with the fields
12 * enclosed by brackets [] replaced by your own identifying information:
13 * "Portions Copyrighted [year] [name of copyright owner]"
14 *
15 * The Original Software is the JSwat Core Module. The Initial Developer of the
16 * Software is Nathan L. Fiedler. Portions created by Nathan L. Fiedler
17 * are Copyright (C) 2002-2010. All Rights Reserved.
18 *
19 * Contributor(s): Nathan L. Fiedler.
20 *
21 * $Id: RootNode.java 287 2010-11-21 02:04:47Z nathanfiedler $
22 */
23package com.bluemarsh.jswat.core.expr;
24
25/**
26 * Class RootNode is a parent node that has no parent.
27 *
28 * @author  Nathan Fiedler
29 */
30class RootNode extends ParentNode {
31
32    /**
33     * Constructs a RootNode.
34     */
35    RootNode() {
36        super(null);
37    }
38
39    /**
40     * Sets the parent node of this node.
41     *
42     * @param  parent  parent node.
43     */
44    public void setParent(Node parent) {
45        throw new UnsupportedOperationException("root has no parent");
46    }
47}