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


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"),
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30  ***** END LICENSE BLOCK *****/
31 package org.jruby.ast;
32
33 import java.util.List JavaDoc;
34 import org.jruby.Ruby;
35 import org.jruby.RubyFixnum;
36
37 import org.jruby.ast.types.ILiteralNode;
38 import org.jruby.ast.visitor.NodeVisitor;
39 import org.jruby.evaluator.Instruction;
40 import org.jruby.lexer.yacc.ISourcePosition;
41
42 /** Represents an integer literal.
43  *
44  * @author jpetersen
45  */
46 public class FixnumNode extends Node implements ILiteralNode {
47     static final long serialVersionUID = 2236565825959274729L;
48
49     private long value;
50     private RubyFixnum fixnum;
51
52     public FixnumNode(ISourcePosition position, long value) {
53         super(position, NodeTypes.FIXNUMNODE);
54         this.value = value;
55     }
56
57     public Instruction accept(NodeVisitor iVisitor) {
58         return iVisitor.visitFixnumNode(this);
59     }
60
61     /**
62      * Gets the value.
63      * @return Returns a long
64      */
65     public long getValue() {
66         return value;
67     }
68     
69     public void setValue(long value) {
70         // This should never happen past parse, but just bulletproof this just in case
71 if (fixnum != null) {
72             fixnum = null;
73         }
74         this.value = value;
75     }
76     
77     public RubyFixnum getFixnum(Ruby runtime) {
78         if (fixnum == null) {
79             return fixnum = RubyFixnum.newFixnum(runtime, value);
80         }
81         return fixnum;
82     }
83     
84     public List JavaDoc childNodes() {
85         return EMPTY_LIST;
86     }
87
88 }
89
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