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


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
6  * except in compliance with the License. You may obtain a copy of
7  * the License at http://www.eclipse.org/legal/cpl-v10.html
8  *
9  * Software distributed under the License is distributed on an "AS
10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
12  * rights and limitations under the License.
13  *
14  * Copyright (C) 2001-2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
15  * Copyright (C) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
16  * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
17  * Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
18  *
19  * Alternatively, the contents of this file may be used under the terms of
20  * either of the GNU General Public License Version 2 or later (the "GPL"),
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30  ***** END LICENSE BLOCK *****/
31 package org.jruby.ast;
32
33 import java.io.IOException JavaDoc;
34 import java.util.List JavaDoc;
35
36 import org.jruby.ast.types.INameNode;
37 import org.jruby.ast.visitor.NodeVisitor;
38 import org.jruby.evaluator.Instruction;
39 import org.jruby.lexer.yacc.ISourcePosition;
40
41 /**
42  * The access to a Constant.
43  *
44  * @author jpetersen
45  */
46 public class ConstNode extends Node implements INameNode {
47     static final long serialVersionUID = -5190161028130457944L;
48
49     private String JavaDoc name;
50     
51     public ConstNode(ISourcePosition position, String JavaDoc name) {
52         super(position, NodeTypes.CONSTNODE);
53         this.name = name.intern();
54     }
55     
56     private void readObject(java.io.ObjectInputStream JavaDoc in) throws IOException JavaDoc, ClassNotFoundException JavaDoc {
57         in.defaultReadObject();
58         
59         // deserialized strings are not interned; intern it now
60 name = name.intern();
61     }
62
63     /**
64      * Accept for the visitor pattern.
65      * @param iVisitor the visitor
66      **/
67     public Instruction accept(NodeVisitor iVisitor) {
68         return iVisitor.visitConstNode(this);
69     }
70
71     /**
72      * Gets the name.
73      * @return Returns a String
74      */
75     public String JavaDoc getName() {
76         return name;
77     }
78     
79     public List JavaDoc childNodes() {
80         return EMPTY_LIST;
81     }
82     
83     public String JavaDoc toString() {
84         return "ConstNode [" + name + "]";
85     }
86
87     public void setName(String JavaDoc name) {
88         this.name = name;
89     }
90
91 }
92
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