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Java > Open Source Codes > org > jruby > ast > DefinedNode


1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
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7  * the License at http://www.eclipse.org/legal/cpl-v10.html
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10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
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13  *
14  * Copyright (C) 2001 Chad Fowler <chadfowler@chadfowler.com>
15  * Copyright (C) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
16  * Copyright (C) 2001-2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
17  * Copyright (C) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se>
18  * Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
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31  ***** END LICENSE BLOCK *****/
32 package org.jruby.ast;
33
34 import java.util.List JavaDoc;
35
36 import org.jruby.ast.visitor.NodeVisitor;
37 import org.jruby.evaluator.Instruction;
38 import org.jruby.lexer.yacc.ISourcePosition;
39
40 /**
41  * a defined statement.
42  * @author jpetersen
43  */
44 public class DefinedNode extends Node {
45     static final long serialVersionUID = -6942286690645861964L;
46
47     private final Node expressionNode;
48
49     public DefinedNode(ISourcePosition position, Node expressionNode) {
50         super(position, NodeTypes.DEFINEDNODE);
51         this.expressionNode = expressionNode;
52     }
53
54     /**
55      * Accept for the visitor pattern.
56      * @param iVisitor the visitor
57      **/
58     public Instruction accept(NodeVisitor iVisitor) {
59         return iVisitor.visitDefinedNode(this);
60     }
61
62     /**
63      * Gets the expressionNode.
64      * @return Returns a Node
65      */
66     public Node getExpressionNode() {
67         return expressionNode;
68     }
69     
70     public List JavaDoc childNodes() {
71         return createList(expressionNode);
72     }
73
74 }
75
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