juplo.de Git - jpa-converters/blob - src/main/java/de/juplo/jpa/converters/OffsetDateTimeConverter.java

   1 package de.juplo.jpa.converters;
   2
   3 import java.time.OffsetDateTime;
   4 import java.time.ZonedDateTime;
   5 import java.util.GregorianCalendar;
   6 import javax.persistence.AttributeConverter;
   7 import javax.persistence.Converter;
   8
   9
  10 /**
  11  * Converts a {@link OffsetDateTime} to a {@link GregorianCalendar}, by first
  12  * converting it into a {@link ZonedDateTime} and then converting it as
  13  * suggested in the official Java 8 Time tutorial.
  14  * <p>
  15  * The {@link GregorianCalendar} can then be persisted as
  16  * {@link java.persistene.TemporalType.TIMESTAMP} with the help of the
  17  * {@link java.persist.Tmporal}-annotation.
  18  * @see https://docs.oracle.com/javase/tutorial/datetime/iso/legacy.html
  19  * @author Kai Moritz
  20  */
  21 @Converter(autoApply = true)
  22 public class OffsetDateTimeConverter implements AttributeConverter<OffsetDateTime, GregorianCalendar>
  23 {
  24   @Override
  25   public GregorianCalendar convertToDatabaseColumn(OffsetDateTime odt)
  26   {
  27     return GregorianCalendar.from(ZonedDateTime.from(odt));
  28   }
  29
  30   @Override
  31   public OffsetDateTime convertToEntityAttribute(GregorianCalendar calendar)
  32   {
  33     return OffsetDateTime.from(calendar.toZonedDateTime());
  34   }
  35 }