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