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


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 Jan Arne Petersen <jpetersen@uni-bonn.de>
15  * Copyright (C) 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"),
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  * Class variable assignment node.
43  *
44  * @author jpetersen
45  */
46 public class ClassVarAsgnNode extends AssignableNode implements INameNode {
47     static final long serialVersionUID = -2960487069128667341L;
48
49     private String JavaDoc name;
50
51     /**
52      * @param name id of the class variable to assign to
53      * @param valueNode Node used to compute the new value when the assignment is evaled
54      */
55     public ClassVarAsgnNode(ISourcePosition position, String JavaDoc name, Node valueNode) {
56         super(position, NodeTypes.CLASSVARASGNNODE);
57         this.name = name.intern();
58         
59         setValueNode(valueNode);
60     }
61     
62     private void readObject(java.io.ObjectInputStream JavaDoc in) throws IOException JavaDoc, ClassNotFoundException JavaDoc {
63         in.defaultReadObject();
64         
65         // deserialized strings are not interned; intern it now
66 name = name.intern();
67     }
68
69     /**
70      * Accept for the visitor pattern.
71      * @param iVisitor the visitor
72      **/
73     public Instruction accept(NodeVisitor iVisitor) {
74         return iVisitor.visitClassVarAsgnNode(this);
75     }
76
77     /**
78      * Gets the name.
79      * @return Returns a String
80      */
81     public String JavaDoc getName() {
82         return name;
83     }
84     
85     public List JavaDoc childNodes() {
86         return createList(getValueNode());
87     }
88
89 }
90
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