01: /***************************************************************
02: * This file is part of the [fleXive](R) project.
03: *
04: * Copyright (c) 1999-2007
05: * UCS - unique computing solutions gmbh (http://www.ucs.at)
06: * All rights reserved
07: *
08: * The [fleXive](R) project is free software; you can redistribute
09: * it and/or modify it under the terms of the GNU General Public
10: * License as published by the Free Software Foundation;
11: * either version 2 of the License, or (at your option) any
12: * later version.
13: *
14: * The GNU General Public License can be found at
15: * http://www.gnu.org/copyleft/gpl.html.
16: * A copy is found in the textfile GPL.txt and important notices to the
17: * license from the author are found in LICENSE.txt distributed with
18: * these libraries.
19: *
20: * This library is distributed in the hope that it will be useful,
21: * but WITHOUT ANY WARRANTY; without even the implied warranty of
22: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23: * GNU General Public License for more details.
24: *
25: * For further information about UCS - unique computing solutions gmbh,
26: * please see the company website: http://www.ucs.at
27: *
28: * For further information about [fleXive](R), please see the
29: * project website: http://www.flexive.org
30: *
31: *
32: * This copyright notice MUST APPEAR in all copies of the file!
33: ***************************************************************/package com.flexive.faces.validators;
34:
35: import com.flexive.faces.messages.FxFacesMsgErr;
36:
37: import javax.faces.component.UIComponent;
38: import javax.faces.context.FacesContext;
39: import javax.faces.validator.Validator;
40: import javax.faces.validator.ValidatorException;
41: import java.util.regex.Pattern;
42: import java.util.regex.PatternSyntaxException;
43:
44: /**
45: * Checks if the given input value is a valid regular expression (unlike Tomahawk's
46: * validateRegexpr validator, which validates the input value using a regular expression).
47: *
48: * @author Daniel Lichtenberger (daniel.lichtenberger@flexive.com), UCS - unique computing solutions gmbh (http://www.ucs.at)
49: * @version $Rev: 1 $
50: */
51: public class RegularExpressionValidator implements Validator {
52: public void validate(FacesContext context, UIComponent component,
53: Object value) throws ValidatorException {
54: if (value == null || !(value instanceof String)) {
55: throw new ValidatorException(new FxFacesMsgErr(
56: "RegularExpressionValidator.err.invalidClass",
57: value != null ? value.getClass().getCanonicalName()
58: : "null"));
59: }
60: try {
61: Pattern.compile((String) value);
62: } catch (PatternSyntaxException e) {
63: throw new ValidatorException(new FxFacesMsgErr(
64: "RegularExpressionValidator.err.invalid", e
65: .getMessage()));
66: }
67: }
68: }
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