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.applib.jaxb;
  
  import java.sql.Timestamp;
  import java.util.GregorianCalendar;
  
  import javax.xml.datatype.DatatypeConfigurationException;
  import javax.xml.datatype.DatatypeFactory;
  import javax.xml.datatype.XMLGregorianCalendar;
  
  import lombok.experimental.UtilityClass;
  
  /**
   * @since 2.0 {@index}
   */
  @UtilityClass
  public final class JavaSqlXMLGregorianCalendarMarshalling {
  
      public static Timestamp toTimestamp(final XMLGregorianCalendar calendar) {
          return calendar != null
                  ? new Timestamp(calendar.toGregorianCalendar().getTime().getTime())
                  : null;
      }
  
      public static XMLGregorianCalendar toXMLGregorianCalendar(final Timestamp timestamp) {
          if(timestamp == null) {
              return null;
          }
          GregorianCalendar c = new GregorianCalendar();
          c.setTime(timestamp);
          return getDatatypeFactory().newXMLGregorianCalendar(c);
      }
  
      // this assumes DTF is thread-safe, which it most probably is..
      // http://bugs.java.com/bugdatabase/view_bug.do?bug_id=6466177
      static DatatypeFactory datatypeFactory = null;
  
      private static DatatypeFactory getDatatypeFactory() {
          if(datatypeFactory == null) {
              try {
                  datatypeFactory = DatatypeFactory.newInstance();
                  return datatypeFactory;
              } catch (DatatypeConfigurationException e) {
                  throw new RuntimeException(e);
              }
          }
          return datatypeFactory;
      }
  }
  