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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
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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) 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  * Copyright (C) 2006 Lukas Felber <lfelber@hsr.ch>
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31  ***** END LICENSE BLOCK *****/
32 package org.jruby.ast;
33
34 import java.io.IOException JavaDoc;
35 import java.util.List JavaDoc;
36
37 import org.jruby.ast.types.IArityNode;
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 import org.jruby.runtime.Arity;
43
44 /**
45  * Represents an instance variable accessor.
46  */
47 public class InstVarNode extends Node implements IArityNode, INameNode {
48     static final long serialVersionUID = 6839063763576230282L;
49
50     private String JavaDoc name;
51
52     public InstVarNode(ISourcePosition position, String JavaDoc name) {
53         super(position, NodeTypes.INSTVARNODE);
54         this.name = name.intern();
55     }
56     
57     private void readObject(java.io.ObjectInputStream JavaDoc in) throws IOException JavaDoc, ClassNotFoundException JavaDoc {
58         in.defaultReadObject();
59         
60         // deserialized strings are not interned; intern it now
61 name = name.intern();
62     }
63
64     /**
65      * Accept for the visitor pattern.
66      * @param iVisitor the visitor
67      **/
68     public Instruction accept(NodeVisitor iVisitor) {
69         return iVisitor.visitInstVarNode(this);
70     }
71
72     /**
73      * A variable accessor takes no arguments.
74      */
75     public Arity getArity() {
76         return Arity.noArguments();
77     }
78     
79     /**
80      * Gets the name.
81      * @return Returns a String
82      */
83     public String JavaDoc getName() {
84         return name;
85     }
86
87     public List JavaDoc childNodes() {
88         return EMPTY_LIST;
89     }
90     
91     public void setName(String JavaDoc name){
92             this.name = name;
93     }
94
95 }
96
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