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


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) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se>
15  * Copyright (C) 2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
16  * Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
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"),
21  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
22  * in which case the provisions of the GPL or the LGPL are applicable instead
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29  * the terms of any one of the CPL, the GPL or the LGPL.
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  * access to a global variable.
43  * @author jpetersen
44  */
45 public class GlobalVarNode extends Node implements INameNode {
46     static final long serialVersionUID = -8913633094119740033L;
47
48     private String JavaDoc name;
49
50     public GlobalVarNode(ISourcePosition position, String JavaDoc name) {
51         super(position, NodeTypes.GLOBALVARNODE);
52         this.name = name.intern();
53     }
54     
55     private void readObject(java.io.ObjectInputStream JavaDoc in) throws IOException JavaDoc, ClassNotFoundException JavaDoc {
56         in.defaultReadObject();
57         
58         // deserialized strings are not interned; intern it now
59 name = name.intern();
60     }
61
62     /**
63      * Accept for the visitor pattern.
64      * @param iVisitor the visitor
65      **/
66     public Instruction accept(NodeVisitor iVisitor) {
67         return iVisitor.visitGlobalVarNode(this);
68     }
69
70     /**
71      * Gets the name.
72      * @return Returns a String
73      */
74     public String JavaDoc getName() {
75         return name;
76     }
77
78     public List JavaDoc childNodes() {
79         return EMPTY_LIST;
80     }
81 }
82
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