/*
    * Copyright 2012-2021 CodeLibs Project and the Others.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied. See the License for the specific language
   * governing permissions and limitations under the License.
   */
  package org.codelibs.fess.validation;
  
  import javax.validation.ConstraintValidator;
  import javax.validation.ConstraintValidatorContext;
  
  import org.codelibs.core.lang.StringUtil;
  import org.lastaflute.job.util.LaCronUtil;
  
  public class CronExpressionValidator implements ConstraintValidator<CronExpression, String> {
  
      @Override
      public void initialize(final CronExpression constraintAnnotation) {
      }
  
      @Override
      public boolean isValid(final String value, final ConstraintValidatorContext context) {
          return determineValid(value);
      }
  
      protected boolean determineValid(final String value) {
          if (StringUtil.isNotBlank(value) && !LaCronUtil.isCronExpValid(value)) {
              return false;
          }
          return true;
      }
  
  }