1 /**
2 * Redistribution and use of this software and associated documentation
3 * ("Software"), with or without modification, are permitted provided
4 * that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain copyright
7 * statements and notices. Redistributions must also contain a
8 * copy of this document.
9 *
10 * 2. Redistributions in binary form must reproduce the
11 * above copyright notice, this list of conditions and the
12 * following disclaimer in the documentation and/or other
13 * materials provided with the distribution.
14 *
15 * 3. The name "Exolab" must not be used to endorse or promote
16 * products derived from this Software without prior written
17 * permission of Intalio, Inc. For written permission,
18 * please contact info@exolab.org.
19 *
20 * 4. Products derived from this Software may not be called "Exolab"
21 * nor may "Exolab" appear in their names without prior written
22 * permission of Intalio, Inc. Exolab is a registered
23 * trademark of Intalio, Inc.
24 *
25 * 5. Due credit should be given to the Exolab Project
26 * (http://www.exolab.org/).
27 *
28 * THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32 * INTALIO, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39 * OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Copyright 2000-2002 (C) Intalio, Inc. All Rights Reserved.
42 *
43 * $Id$
44 */
45
46 package org.exolab.castor.util;
47
48 import org.apache.oro.text.regex.*;
49
50 /**
51 * An implementation of the RegExpEvaluator that uses the
52 * Jakarta ORO Regular Expression library. For more information
53 * about the Jakarta ORO library please visit:
54 * <a href="http://jakarta.apache.org/oro/">
55 * http://jakarta.apache.org/oro/</a>;
56 *
57 * @author <a href="mailto:glenn@voyager.apg.more.net">Glenn Nielsen</a>
58 * @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
59 * @version $Revision$ $Date: 2003-03-03 00:05:44 -0700 (Mon, 03 Mar 2003) $
60 **/
61 public class JakartaOroEvaluator
62 implements RegExpEvaluator
63 {
64
65 private static final String BOL = "^";
66 private static final String EOL = "$";
67
68 /**
69 * The Regular expression
70 **/
71 private Perl5Pattern _regexp = null;
72
73 /**
74 * Sets the regular expression to match against during
75 * a call to #matches
76 *
77 * @param rexpr the regular expression
78 **/
79 public void setExpression(String rexpr) {
80
81 if (rexpr != null) {
82 try {
83 //-- patch and compile expression
84 Perl5Compiler compiler = new Perl5Compiler();
85 _regexp = (Perl5Pattern) compiler.compile(BOL + rexpr + EOL,
86 Perl5Compiler.SINGLELINE_MASK);
87 }
88 catch(MalformedPatternException ex) {
89 String err = "RegExp Syntax error: ";
90 err += ex.getMessage();
91 err += " ; error occured with the following "+
92 "regular expression: " + rexpr;
93
94 throw new IllegalArgumentException(err);
95 }
96 }
97 else
98 _regexp = null;
99 } //-- setExpression
100
101 /**
102 * Returns true if the given String is matched by the
103 * regular expression of this RegExpEvaluator
104 *
105 * @param value the String to check the production of
106 * @return true if the given string matches the regular
107 * expression of this RegExpEvaluator
108 * @see #setExpression
109 **/
110 public boolean matches(String value)
111 {
112 // object to match compiled regular expressions
113 Perl5Matcher matcher = new Perl5Matcher();
114 // class for accessing results of pattern match
115 return matcher.contains(value,_regexp);
116 } //-- matches
117
118 } //-- JakartaOroEvaluator
119
120
121