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   *   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
   *
   *    https://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.
   ****************************************************************/
  // This code used in docs too, so it should be formatted
  // to 80 char line to fit in PDF.
  package org.apache.cayenne.tutorial.persistent;
  
  import java.time.LocalDate;
  import java.time.format.DateTimeFormatter;
  import java.time.format.DateTimeParseException;
  
  import org.apache.cayenne.tutorial.persistent.auto._Artist;
  
  // tag::content[]
  public class Artist extends _Artist {
  
      static final String DEFAULT_DATE_FORMAT = "yyyyMMdd";
  
      /**
       * Sets date of birth using a string in format yyyyMMdd.
       */
      public void setDateOfBirthString(String yearMonthDay) {
          if (yearMonthDay == null) {
              setDateOfBirth(null);
              return;
          }
  
          LocalDate date;
          try {
              DateTimeFormatter formatter = DateTimeFormatter
                      .ofPattern(DEFAULT_DATE_FORMAT);
              date = LocalDate.parse(yearMonthDay, formatter);
          } catch (DateTimeParseException e) {
              throw new IllegalArgumentException(
                      "A date argument must be in format '"
                              + DEFAULT_DATE_FORMAT + "': " + yearMonthDay);
          }
          setDateOfBirth(date);
      }
  }
  // end::content[]
  