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 (C) Intalio, Inc. All Rights Reserved.
42 *
43 * $Id$
44 */
45
46 package org.exolab.castor.util;
47
48 import org.apache.regexp.*;
49 import org.castor.core.util.Messages;
50
51 /**
52 * An implementation of {@link RegExpEvaluator} that uses the Jakarta Regular
53 * Expression library. For more information about the Jakarta RE library please
54 * visit: <a href="http://jakarta.apache.org/regexp/">
55 * http://jakarta.apache.org/regexp/</a>;
56 *
57 * @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
58 * @version $Revision$ $Date: 2004-02-14 02:16:35 -0700 (Sat, 14 Feb
59 * 2004) $
60 */
61 public class JakartaRegExpEvaluator implements RegExpEvaluator {
62
63 /**
64 * Reguar expression denoting a beginning of line.
65 */
66 private static final String BOL = "^(";
67
68 /**
69 * Regular expression denoting end of line.
70 */
71 private static final String EOL = ")$";
72
73 /**
74 * The Regular expression
75 */
76 private RE _regexp;
77
78 /**
79 * {@inheritDoc}
80 *
81 * @see org.exolab.castor.util.RegExpEvaluator#setExpression(java.lang.String)
82 */
83 public void setExpression(final String rexpr) {
84
85 if (rexpr != null) {
86 try {
87 // -- patch and compile expression
88 _regexp = new RE(BOL + rexpr + EOL);
89 } catch (RESyntaxException ex) {
90 String message = Messages.format("regexp.eval.error", rexpr);
91 throw new IllegalArgumentException(message, ex);
92 }
93 } else {
94 _regexp = null;
95 }
96 }
97
98 /**
99 * {@inheritDoc}
100 *
101 * @see org.exolab.castor.util.RegExpEvaluator#matches(java.lang.String)
102 */
103 public boolean matches(final String value) {
104 if (_regexp != null) {
105 return _regexp.match(value);
106 }
107 return true;
108 }
109
110 }