1 /*
2 * Copyright 2012-2025 CodeLibs Project and the Others.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13 * either express or implied. See the License for the specific language
14 * governing permissions and limitations under the License.
15 */
16 package org.codelibs.fess.validation;
17
18 import org.codelibs.core.lang.StringUtil;
19 import org.lastaflute.job.util.LaCronUtil;
20
21 import jakarta.validation.ConstraintValidator;
22 import jakarta.validation.ConstraintValidatorContext;
23
24 /**
25 * Validator implementation for the CronExpression constraint.
26 */
27 public class CronExpressionValidator implements ConstraintValidator<CronExpression, String> {
28
29 /**
30 * Default constructor.
31 */
32 public CronExpressionValidator() {
33 // Empty constructor
34 }
35
36 @Override
37 public void initialize(final CronExpression constraintAnnotation) {
38 }
39
40 @Override
41 public boolean isValid(final String value, final ConstraintValidatorContext context) {
42 return determineValid(value);
43 }
44
45 /**
46 * Determines if the given value is a valid cron expression.
47 * @param value the value to validate
48 * @return true if valid, false otherwise
49 */
50 protected boolean determineValid(final String value) {
51 if (StringUtil.isNotBlank(value) && !LaCronUtil.isCronExpValid(value)) {
52 return false;
53 }
54 return true;
55 }
56
57 }