1 /*
2 Copyright (C) 2000 - 2007 Grid Systems, S.A.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License, version 2, as
6 published by the Free Software Foundation.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 */
17
18 /*
19 * Project: KernelConfigurator
20 * Created on 04-mar-2004
21 *
22 * Copyright (c)2003 Grid Systems
23 */
24 package com.gridsystems.config.tools;
25
26 import java.util.regex.Matcher;
27 import java.util.regex.Pattern;
28
29 /**
30 * Performs a validation based on the pattern specified on construction.
31 * <p>
32 * The pattern follows the syntax specified in the {@link java.util.regex.Pattern}
33 * documentation.
34 *
35 * @author <a href="mailto:rruiz@gridsystems.com">Rodrigo Ruiz Aguayo</a>
36 * @version 1.0
37 */
38 public class PatternVerifier extends TextVerifier {
39 /**
40 * Identifier for errors detected by this verifier.
41 */
42 public static final String ID_ERROR = "PatternMatchError";
43
44 /**
45 * The pattern to match to.
46 */
47 private Pattern p;
48
49 /**
50 * Identifier of the error detected by this verifier.
51 */
52 protected String id;
53
54 /**
55 * Creates a new instance with the specified pattern string and default flags.
56 *
57 * @param support The ErrorSupport instance
58 * @param id The error id
59 * @param pattern The pattern string to use
60 */
61 public PatternVerifier(ErrorSupport support, String id, String pattern) {
62 this(support, id, Pattern.compile(pattern));
63 }
64
65 /**
66 * Creates an instance.
67 *
68 * @param support The error support instance
69 * @param id The error id
70 * @param pattern The pattern string to use
71 * @param flags The flags for pattern compilation
72 */
73 public PatternVerifier(ErrorSupport support, String id, String pattern, int flags) {
74 this(support, id, Pattern.compile(pattern, flags));
75 }
76
77 /**
78 * Creates a new instance with the specified pattern.
79 *
80 * @param support The error support instance
81 * @param id The error id
82 * @param pattern The pattern to use
83 */
84 public PatternVerifier(ErrorSupport support, String id, Pattern pattern) {
85 super(support);
86 this.id = id;
87 this.p = pattern;
88 }
89
90 /**
91 * {@inheritDoc}
92 */
93 public boolean verify(String text) {
94 Matcher m = p.matcher(text);
95 boolean valid = m.matches();
96
97 this.updateError(id, !valid);
98 return valid;
99 }
100
101 /**
102 * @see TextVerifier#cleanErrors()
103 */
104 public void cleanErrors() {
105 updateError(id, false);
106 }
107 }