01: /*
02: * Copyright 2005-2006 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
05: * in compliance with the License. You may obtain a copy of the License at
06: *
07: * http://www.apache.org/licenses/LICENSE-2.0
08: *
09: * Unless required by applicable law or agreed to in writing, software distributed under the License
10: * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11: * or implied. See the License for the specific language governing permissions and limitations under
12: * the License.
13: */
14:
15: package org.strecks.validator;
16:
17: import org.apache.commons.validator.GenericValidator;
18: import org.strecks.util.Assert;
19:
20: /**
21: * Uses Commons Validator to check whether the String entered conforms to a given Perl5 regular expression pattern
22: * @author Phil Zoio
23: */
24: public class PatternValidator implements Validator<String> {
25:
26: private String pattern;
27:
28: public PatternValidator(String pattern) {
29: Assert.notNull(pattern);
30: this .pattern = pattern;
31: }
32:
33: /**
34: * Simply calls GenericValidator.matchRegExp()
35: */
36: public boolean validate(String value) {
37: if ((value == null || value.length() == 0))
38: return true;
39: return GenericValidator.matchRegexp(value, pattern);
40: }
41:
42: }
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