/**
* Compare algorithm described in dateDime (3.2.7). Duration datatype overwrites this method
*
* @param date1 normalized date representation of the first value
* @param date2 normalized date representation of the second value
* @param strict
* @return less, greater, less_equal, greater_equal, equal
*/
protected short compareDates(DateTimeData date1, DateTimeData date2, boolean strict) {
if (date1.utc == date2.utc) {
return compareOrder(date1, date2);
}
short c1, c2;
DateTimeData tempDate = new DateTimeData(null, this);
if (date1.utc == 'Z') {
// compare date1<=date1<=(date2 with time zone -14)
//
cloneDate(date2, tempDate); // clones date1 value to global temporary storage: fTempDate
tempDate.timezoneHr = 14;
tempDate.timezoneMin = 0;
tempDate.utc = '+';
normalize(tempDate);
c1 = compareOrder(date1, tempDate);
if (c1 == LESS_THAN) return c1;
// compare date1>=(date2 with time zone +14)
//
cloneDate(date2, tempDate); // clones date1 value to global temporary storage: tempDate
tempDate.timezoneHr = -14;
tempDate.timezoneMin = 0;
tempDate.utc = '-';
normalize(tempDate);
c2 = compareOrder(date1, tempDate);
if (c2 == GREATER_THAN) return c2;
return INDETERMINATE;
} else if (date2.utc == 'Z') {
// compare (date1 with time zone -14)<=date2
//
cloneDate(date1, tempDate); // clones date1 value to global temporary storage: tempDate
tempDate.timezoneHr = -14;
tempDate.timezoneMin = 0;
tempDate.utc = '-';
if (DEBUG) {
System.out.println("tempDate=" + dateToString(tempDate));
}
normalize(tempDate);
c1 = compareOrder(tempDate, date2);
if (DEBUG) {
System.out.println("date=" + dateToString(date2));
System.out.println("tempDate=" + dateToString(tempDate));
}
if (c1 == LESS_THAN) return c1;
// compare (date1 with time zone +14)<=date2
//
cloneDate(date1, tempDate); // clones date1 value to global temporary storage: tempDate
tempDate.timezoneHr = 14;
tempDate.timezoneMin = 0;
tempDate.utc = '+';
normalize(tempDate);
c2 = compareOrder(tempDate, date2);
if (DEBUG) {
System.out.println("tempDate=" + dateToString(tempDate));
}
if (c2 == GREATER_THAN) return c2;
return INDETERMINATE;
}
return INDETERMINATE;
}
