@Override
public Time plus(Integer hour, Integer minute, Integer second, Integer nanoseconds) {
DateTimeInterval interval = new DateTimeInterval(this);
interval.plus(hour, minute, second, nanoseconds);
return GregorianDateTime.newTime(
interval.getResultHour(),
interval.getResultMinute(),
interval.getResultSecond(),
interval.getResultNanoseconds());
}
@Override
public Time minus(Time that) {
DateTimeInterval interval = new DateTimeInterval(this);
interval.minus(that.getHour(), that.getMinute(), that.getSecond(), that.getNanoseconds());
return GregorianDateTime.newTime(
interval.getResultHour(),
interval.getResultMinute(),
interval.getResultSecond(),
interval.getResultNanoseconds());
}
@Override
public Time changeTimeZone(TimeZone fromTimeZone, TimeZone toTimeZone) {
Calendar fromDate = new GregorianCalendar(fromTimeZone);
fromDate.set(Calendar.HOUR_OF_DAY, getHour());
fromDate.set(Calendar.MINUTE, getMinute());
// other items zeroed out here, since they don't matter for time zone calculations
fromDate.set(Calendar.SECOND, 0);
fromDate.set(Calendar.MILLISECOND, 0);
// millisecond precision is OK here, since the seconds/nanoseconds are not part of the calc
Calendar toDate = new GregorianCalendar(toTimeZone);
toDate.setTimeInMillis(fromDate.getTimeInMillis());
return GregorianDateTime.newTime(
toDate.get(Calendar.HOUR_OF_DAY), getMinute(), getSecond(), getNanoseconds());
}