content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you 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.apache.causeway.core.metamodel.examples.facets.jsr303;
  
  import jakarta.validation.Constraint;
  
  public class CustomPatternValidator implements Constraint<CustomPattern> {
      private java.util.regex.Pattern pattern;
  
      public void initialize(final CustomPattern params) {
          pattern = java.util.regex.Pattern.compile(params.regex(), params.flags());
      }
  
      public boolean isValid(final Object ovalue) {
          if (ovalue == null) {
              return true;
          }
          if (!(ovalue instanceof String)) {
              return false;
          }
          final String value = (String) ovalue;
          return pattern.matcher(value).matches();
      }
  }
  