We're currently using JodaTime and it would be very handy for us to have the
conversion to julian dates.
Is somebody working on this ? if no is there an easy way* to contribute to joda
project (find above the conversion code - ) ?
-David
P.S.: *I don't know how easy it is to add code to Joda trunk..
-> code :
protected static int toJulianDate(int day, int month, int year)
{
final int m1 = (month - 14) / 12;
final int y1 = year + 4800;
final int julian = (1461 * (y1 + m1) >> 2)
+ (367 * (month - 2 - 12 * m1) / 12)
- ((3 * ((y1 + m1 + 100) / 100)) >> 2)
+ day - 32075;
return julian;
}
protected static LocalDate toLocalDate(final int julianDate)
{
final int pp = julianDate + 68569;
final int qq = (pp << 2) / 146097;
final int rr = pp - ((146097 * qq + 3) >> 2);
final int dd = 4000 * (rr + 1) / 1461001;
final int tt = rr - ((1461 * dd) >> 2) + 31;
final int uu = 80 * tt / 2447;
final int vv = uu / 11;
final int year = 100 * (qq - 49) + dd + vv;
final int month = uu + 2 - 12 * vv;
final int day = tt - 2447 * uu / 80;
final LocalDate ymd = new LocalDate (year, month, day);
return ymd;
}
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