KickJava   Java API By Example, From Geeks To Geeks.

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


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 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
23  * of those above. If you wish to allow use of your version of this file only
24  * under the terms of either the GPL or the LGPL, and not to allow others to
25  * use your version of this file under the terms of the CPL, indicate your
26  * decision by deleting the provisions above and replace them with the notice
27  * and other provisions required by the GPL or the LGPL. If you do not delete
28  * the provisions above, a recipient may use your version of this file under
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.visitor.NodeVisitor;
37 import org.jruby.evaluator.Instruction;
38 import org.jruby.lexer.yacc.ISourcePosition;
39
40 /** Represents an alias of a global variable.
41  *
42  * @author jpetersen
43  */
44 public class VAliasNode extends Node {
45     static final long serialVersionUID = 8647860367861922838L;
46
47     private String JavaDoc oldName;
48     private String JavaDoc newName;
49
50     public VAliasNode(ISourcePosition position, String JavaDoc newName, String JavaDoc oldName) {
51         super(position, NodeTypes.VALIASNODE);
52         this.oldName = oldName.intern();
53         this.newName = newName.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 oldName = oldName.intern();
61         newName = newName.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.visitVAliasNode(this);
70     }
71
72     /**
73      * Gets the newName.
74      * @return Returns a String
75      */
76     public String JavaDoc getNewName() {
77         return newName;
78     }
79
80     /**
81      * Gets the oldName.
82      * @return Returns a String
83      */
84     public String JavaDoc getOldName() {
85         return oldName;
86     }
87     
88     public List JavaDoc childNodes() {
89         return EMPTY_LIST;
90     }
91
92 }
93
Popular Tags