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Java > Open Source Codes > org > jruby > ast > Colon3Node


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) 2004-2006 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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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  * Global scope node.
43  * Node produced when using :: without a scope in front.
44  * This is used to gain access to the global scope (that of the Object class)
45  * when refering to a constant or method. This is the same as a Colon2Node but with
46  * no leftNode which implicitly uses the Object class as a left node.
47  *
48  * @author jpetersen
49  */
50 public class Colon3Node extends Node implements INameNode {
51     static final long serialVersionUID = 8860717109371016871L;
52
53     private String JavaDoc name;
54
55     public Colon3Node(ISourcePosition position, String JavaDoc name) {
56         super(position, NodeTypes.COLON3NODE);
57         this.name = name.intern();
58     }
59     
60     public Colon3Node(ISourcePosition position, int id, String JavaDoc name) {
61         super(position, id);
62         this.name = name.intern();
63     }
64     
65     private void readObject(java.io.ObjectInputStream JavaDoc in) throws IOException JavaDoc, ClassNotFoundException JavaDoc {
66         in.defaultReadObject();
67         
68         // deserialized strings are not interned; intern it now
69 name = name.intern();
70     }
71
72     /**
73      * Accept for the visitor pattern.
74      * @param iVisitor the visitor
75      **/
76     public Instruction accept(NodeVisitor iVisitor) {
77         return iVisitor.visitColon3Node(this);
78     }
79
80     /**
81      * Gets the name.
82      * @return Returns a String
83      */
84     public String JavaDoc getName() {
85         return name;
86     }
87     
88     public List JavaDoc childNodes() {
89         return EMPTY_LIST;
90     }
91
92     public void setName(String JavaDoc name) {
93         this.name = name;
94     }
95
96 }
97
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