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

   1 package de.juplo.jpa.converters;
   2
   3 import java.time.Duration;
   4 import java.time.temporal.ChronoUnit;
   5 import java.time.temporal.TemporalAmount;
   6 import javax.persistence.AttributeConverter;
   7 import javax.persistence.Converter;
   8
   9
  10 /**
  11  * Converts a {@link TemporalAmount} into a {@link Long} representing
  12  * nanoseconds.
  13  * @author Kai Moritz
  14  */
  15 @Converter
  16 public class TemporalAmountToNanosConverter implements AttributeConverter<TemporalAmount, Long>
  17 {
  18   @Override
  19   public Long convertToDatabaseColumn(TemporalAmount amount)
  20   {
  21     if (amount == null)
  22       return null;
  23     return amount.get(ChronoUnit.NANOS);
  24   }
  25
  26   @Override
  27   public TemporalAmount convertToEntityAttribute(Long nanos)
  28   {
  29     if (nanos == null)
  30       return null;
  31     return Duration.ofNanos(nanos);
  32   }
  33 }