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


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"),
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30  ***** END LICENSE BLOCK *****/
31 package org.jruby.ast;
32
33 import java.util.List JavaDoc;
34
35 import org.jruby.ast.types.INameNode;
36 import org.jruby.ast.visitor.NodeVisitor;
37 import org.jruby.evaluator.Instruction;
38 import org.jruby.lexer.yacc.ISourcePosition;
39
40 /**
41  * Declaration (and assignment) of a Constant.
42  *
43  * @author jpetersen
44  */
45 public class ConstDeclNode extends AssignableNode implements INameNode {
46     static final long serialVersionUID = -6260931203887158208L;
47
48     private final String JavaDoc name;
49     private final INameNode constNode;
50
51     public ConstDeclNode(ISourcePosition position, String JavaDoc name, INameNode constNode, Node valueNode) {
52         super(position, NodeTypes.CONSTDECLNODE);
53         if (name != null) name.intern();
54         this.name = name;
55         this.constNode = constNode;
56         setValueNode(valueNode);
57     }
58
59     /**
60      * Accept for the visitor pattern.
61      * @param iVisitor the visitor
62      **/
63     public Instruction accept(NodeVisitor iVisitor) {
64         return iVisitor.visitConstDeclNode(this);
65     }
66
67     /**
68      * Gets the name (this is the rightmost element of lhs (in Foo::BAR it is BAR).
69      * name is the constant Name, it normally starts with a Capital
70      * @return name
71      */
72     public String JavaDoc getName() {
73         return (name == null ? constNode.getName() : name);
74     }
75     
76     /**
77      * Get the path the name is associated with or null (in Foo::BAR it is Foo).
78      * @return pathNode
79      */
80     public Node getConstNode() {
81         return (Node) constNode;
82     }
83     
84     public List JavaDoc childNodes() {
85         return createList(getValueNode());
86     }
87
88 }
89
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