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


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 Benoit Cerrina <b.cerrina@wanadoo.fr>
15  * Copyright (C) 2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
16  * Copyright (C) 2004 Charles O Nutter <headius@headius.com>
17  * Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
18  * Copyright (C) 2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
19  * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
20  *
21  * Alternatively, the contents of this file may be used under the terms of
22  * either of the GNU General Public License Version 2 or later (the "GPL"),
23  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
24  * in which case the provisions of the GPL or the LGPL are applicable instead
25  * of those above. If you wish to allow use of your version of this file only
26  * under the terms of either the GPL or the LGPL, and not to allow others to
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30  * the provisions above, a recipient may use your version of this file under
31  * the terms of any one of the CPL, the GPL or the LGPL.
32  ***** END LICENSE BLOCK *****/
33 package org.jruby.ast;
34
35 import java.io.IOException JavaDoc;
36 import java.util.List JavaDoc;
37
38 import org.jruby.ast.types.INameNode;
39 import org.jruby.ast.visitor.NodeVisitor;
40 import org.jruby.evaluator.Instruction;
41 import org.jruby.lexer.yacc.ISourcePosition;
42
43 /**
44  * Represents an assignment to a global variable.
45  *
46  * @author jpetersen
47  */
48 public class GlobalAsgnNode extends AssignableNode implements INameNode {
49     static final long serialVersionUID = 2278414591762936906L;
50
51     private String JavaDoc name;
52
53     public GlobalAsgnNode(ISourcePosition position, String JavaDoc name, Node valueNode) {
54         super(position, NodeTypes.GLOBALASGNNODE);
55
56         this.name = name.intern();
57         setValueNode(valueNode);
58     }
59     
60     private void readObject(java.io.ObjectInputStream JavaDoc in) throws IOException JavaDoc, ClassNotFoundException JavaDoc {
61         in.defaultReadObject();
62         
63         // deserialized strings are not interned; intern it now
64 name = name.intern();
65     }
66
67     /**
68      * RubyMethod used by visitors.
69      * accepts the visitor
70      * @param iVisitor the visitor to accept
71      **/
72     public Instruction accept(NodeVisitor iVisitor) {
73         return iVisitor.visitGlobalAsgnNode(this);
74     }
75     /**
76      * Gets the name.
77      * @return Returns a String
78      */
79     public String JavaDoc getName() {
80         return name;
81     }
82     
83     public List JavaDoc childNodes() {
84         return createList(getValueNode());
85     }
86
87 }
88
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