/**
* Returns the date of Easter Sunday for the given year. See the class description for the source
* of the algorithm.
*
* <p>This method supports the AnnualDateRule interface.
*
* @param year the year to check.
* @return the date of Easter Sunday for the given year.
*/
public SerialDate getDate(int year) {
int g = year % 19;
int c = year / 100;
int h = (c - c / 4 - (8 * c + 13) / 25 + 19 * g + 15) % 30;
int i = h - h / 28 * (1 - h / 28 * 29 / (h + 1) * (21 - g) / 11);
int j = (year + year / 4 + i + 2 - c + c / 4) % 7;
int l = i - j;
int month = 3 + (l + 40) / 44;
int day = l + 28 - 31 * (month / 4);
return SerialDate.createInstance(day, month, year);
}
/** Problem 30/360PSA day count. */
public void testDayCount30PSA() {
final SerialDate d1 = SerialDate.createInstance(1, MonthConstants.APRIL, 2002);
final SerialDate d2 = SerialDate.createInstance(2, MonthConstants.APRIL, 2002);
final int count = SerialDateUtilities.dayCount30PSA(d1, d2);
assertEquals(1, count);
}