/**
* See {@link #ceil(long)}.
*
* <p>This method modifies the given calendar and returns the same object.
*/
public Calendar ceil(Calendar cal) {
OUTER:
while (true) {
for (CalendarField f : CalendarField.ADJUST_ORDER) {
int cur = f.valueOf(cal);
int next = f.ceil(this, cur);
if (cur == next) continue; // this field is already in a good shape. move on to next
// we are modifying this field, so clear all the lower level fields
for (CalendarField l = f.lowerField; l != null; l = l.lowerField) l.clear(cal);
if (next < 0) {
// we need to roll over to the next field.
f.rollUp(cal, 1);
f.setTo(cal, f.first(this));
// since higher order field is affected by this, we need to restart from all over
continue OUTER;
} else {
f.setTo(cal, next);
if (f.redoAdjustmentIfModified)
continue
OUTER; // when we modify DAY_OF_MONTH and DAY_OF_WEEK, do it all over from the top
}
}
return cal; // all fields adjusted
}
}
/**
* See {@link #floor(long)}
*
* <p>This method modifies the given calendar and returns the same object.
*/
public Calendar floor(Calendar cal) {
OUTER:
while (true) {
for (CalendarField f : CalendarField.ADJUST_ORDER) {
int cur = f.valueOf(cal);
int next = f.floor(this, cur);
if (cur == next) continue; // this field is already in a good shape. move on to next
// we are modifying this field, so clear all the lower level fields
for (CalendarField l = f.lowerField; l != null; l = l.lowerField) l.clear(cal);
if (next < 0) {
// we need to borrow from the next field.
f.rollUp(cal, -1);
// the problem here, in contrast with the ceil method, is that
// the maximum value of the field is not always a fixed value (that is, day of month)
// so we zero-clear all the lower fields, set the desired value +1,
f.setTo(cal, f.last(this));
f.addTo(cal, 1);
// then subtract a minute to achieve maximum values on all the lower fields,
// with the desired value in 'f'
CalendarField.MINUTE.addTo(cal, -1);
// since higher order field is affected by this, we need to restart from all over
continue OUTER;
} else {
f.setTo(cal, next);
f.addTo(cal, 1);
CalendarField.MINUTE.addTo(cal, -1);
if (f.redoAdjustmentIfModified)
continue
OUTER; // when we modify DAY_OF_MONTH and DAY_OF_WEEK, do it all over from the top
}
}
return cal; // all fields adjusted
}
}