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


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 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  *
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 import java.util.regex.Pattern JavaDoc;
35
36 import org.jruby.RegexpTranslator;
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 import org.jruby.util.ByteList;
42
43 /** Represents a simple regular expression literal.
44  *
45  * @author jpetersen
46  */
47 public class RegexpNode extends Node implements ILiteralNode {
48     static final long serialVersionUID = -1566813018564622077L;
49
50     private static final RegexpTranslator translator = new RegexpTranslator();
51     
52     private Pattern JavaDoc pattern;
53     private final ByteList value;
54     private final int options;
55     
56     public RegexpNode(ISourcePosition position, ByteList value, int options) {
57         super(position, NodeTypes.REGEXPNODE);
58         
59         this.value = value;
60         this.options = options;
61     }
62
63     public Instruction accept(NodeVisitor iVisitor) {
64         return iVisitor.visitRegexpNode(this);
65     }
66
67     /**
68      * Gets the options.
69      * @return Returns a int
70      */
71     public int getOptions() {
72         return options;
73     }
74
75     /**
76      * Gets the value.
77      * @return Returns a ByteList
78      */
79     public ByteList getValue() {
80         return value;
81     }
82     
83     public Pattern JavaDoc getPattern() throws java.util.regex.PatternSyntaxException JavaDoc {
84         if (pattern == null) {
85             pattern = translator.translate(value.toString(), options, Pattern.UNIX_LINES);
86         }
87         return pattern;
88     }
89     
90     public List JavaDoc childNodes() {
91         return EMPTY_LIST;
92     }
93
94 }
95
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