public long addWrapField(long instant, int years) {
if (years == 0) {
return instant;
}
// Return newly calculated millis value
int thisYear = iChronology.getYear(instant);
int wrappedYear =
FieldUtils.getWrappedValue(
thisYear, years, iChronology.getMinYear(), iChronology.getMaxYear());
return set(instant, wrappedYear);
}
// -----------------------------------------------------------------------
public long add(long instant, long months) {
int i_months = (int) months;
if (i_months == months) {
return add(instant, i_months);
}
// Copied from add(long, int) and modified slightly:
long timePart = iChronology.getMillisOfDay(instant);
int thisYear = iChronology.getYear(instant);
int thisMonth = iChronology.getMonthOfYear(instant, thisYear);
long yearToUse;
long monthToUse = thisMonth - 1 + months;
if (monthToUse >= 0) {
yearToUse = thisYear + (monthToUse / iMax);
monthToUse = (monthToUse % iMax) + 1;
} else {
yearToUse = thisYear + (monthToUse / iMax) - 1;
monthToUse = Math.abs(monthToUse);
int remMonthToUse = (int) (monthToUse % iMax);
if (remMonthToUse == 0) {
remMonthToUse = iMax;
}
monthToUse = iMax - remMonthToUse + 1;
if (monthToUse == 1) {
yearToUse += 1;
}
}
if (yearToUse < iChronology.getMinYear() || yearToUse > iChronology.getMaxYear()) {
throw new IllegalArgumentException("Magnitude of add amount is too large: " + months);
}
int i_yearToUse = (int) yearToUse;
int i_monthToUse = (int) monthToUse;
int dayToUse = iChronology.getDayOfMonth(instant, thisYear, thisMonth);
int maxDay = iChronology.getDaysInYearMonth(i_yearToUse, i_monthToUse);
if (dayToUse > maxDay) {
dayToUse = maxDay;
}
long datePart = iChronology.getYearMonthDayMillis(i_yearToUse, i_monthToUse, dayToUse);
return datePart + timePart;
}
public long set(long instant, int year) {
FieldUtils.verifyValueBounds(this, year, iChronology.getMinYear(), iChronology.getMaxYear());
return iChronology.setYear(instant, year);
}
public int getMinimumValue() {
return iChronology.getMinYear();
}
