How to use

getLong

method

in

java.time.Year

  private YearTimestampHandler(DateTimeConverterOptions options) {
    super(y -> y.getLong(ChronoField.YEAR), l -> Year.of(l.intValue()), y -> y.getLong(ChronoField.YEAR), l -> Year.of(l.intValue()),
        YEAR_TEMPORAL_FIELDS, Year::now);
  }
}

/**
 * Gets the value of the specified field from this year as an {@code int}.
 * <p>
 * This queries this year for the value for the specified field.
 * The returned value will always be within the valid range of values for the field.
 * If it is not possible to return the value, because the field is not supported
 * or for some other reason, an exception is thrown.
 * <p>
 * If the field is a {@link ChronoField} then the query is implemented here.
 * The {@link #isSupported(TemporalField) supported fields} will return valid
 * values based on this year.
 * All other {@code ChronoField} instances will throw a {@code DateTimeException}.
 * <p>
 * If the field is not a {@code ChronoField}, then the result of this method
 * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}
 * passing {@code this} as the argument. Whether the value can be obtained,
 * and what the value represents, is determined by the field.
 *
 * @param field  the field to get, not null
 * @return the value for the field
 * @throws DateTimeException if a value for the field cannot be obtained
 * @throws ArithmeticException if numeric overflow occurs
 */
@Override  // override for Javadoc
public int get(TemporalField field) {
  return range(field).checkValidIntValue(getLong(field), field);
}

case CENTURIES: return yearsUntil / 100;
case MILLENNIA: return yearsUntil / 1000;
case ERAS: return end.getLong(ERA) - getLong(ERA);

case YEAR_OF_ERA: return Year.of((int) (year < 1 ? 1 - newValue : newValue));
case YEAR: return Year.of((int) newValue);
case ERA: return (getLong(ERA) == newValue ? this : Year.of(1 - year));

/**
 * {@inheritDoc}
 * @throws DateTimeException {@inheritDoc}
 * @throws ArithmeticException {@inheritDoc}
 */
@Override
public Year plus(long amountToAdd, TemporalUnit unit) {
  if (unit instanceof ChronoUnit) {
    switch ((ChronoUnit) unit) {
      case YEARS: return plusYears(amountToAdd);
      case DECADES: return plusYears(Jdk8Methods.safeMultiply(amountToAdd, 10));
      case CENTURIES: return plusYears(Jdk8Methods.safeMultiply(amountToAdd, 100));
      case MILLENNIA: return plusYears(Jdk8Methods.safeMultiply(amountToAdd, 1000));
      case ERAS: return with(ERA, Jdk8Methods.safeAdd(getLong(ERA), amountToAdd));
    }
    throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit);
  }
  return unit.addTo(this, amountToAdd);
}