/**
* Returns the matching interval.
*
* @param index
* @param type
* @param tValue
* @return
*/
@SuppressWarnings("unchecked")
private Interval<T> getIntervalUpperSnap(
IndexNode index, DataTypeWithRatioScale<T> type, T tValue) {
// Find interval
double shift =
Math.floor(
type.ratio(type.subtract(tValue, index.min), type.subtract(index.max, index.min)));
T offset = type.multiply(type.subtract(index.max, index.min), shift);
T value = type.subtract(tValue, offset);
Interval<T> interval = null;
for (int j = 0; j < intervals.size(); j++) {
Interval<T> i = intervals.get(j);
if (type.compare(i.min, value) <= 0 && type.compare(i.max, value) > 0) {
// If on lower bound, use next-lower interval
if (type.compare(value, i.min) == 0) {
if (j > 0) {
// Simply use the next one
interval = intervals.get(j - 1);
break;
} else {
// Wrap around
interval = intervals.get(intervals.size() - 1);
offset = type.multiply(type.subtract(index.max, index.min), shift - 1);
break;
}
} else {
interval = i;
break;
}
}
}
if (interval == null && intervals.size() == 1) {
interval = intervals.get(0);
}
// Check
if (interval == null) {
throw new IllegalStateException("Internal error. Sorry for that!");
}
// Create first result interval
T lower = type.add(interval.min, offset);
T upper = type.add(interval.max, offset);
return new Interval<T>(this, (DataType<T>) type, lower, upper, interval.function);
}
/**
* Returns the matching interval.
*
* @param index
* @param type
* @param tValue
* @return
*/
@SuppressWarnings("unchecked")
private Interval<T> getInterval(IndexNode index, DataTypeWithRatioScale<T> type, T tValue) {
// Find interval
int shift =
(int)
Math.floor(
type.ratio(type.subtract(tValue, index.min), type.subtract(index.max, index.min)));
T offset = type.multiply(type.subtract(index.max, index.min), shift);
Interval<T> interval = getInterval(index, type.subtract(tValue, offset));
// Check
if (interval == null) {
throw new IllegalStateException("No interval found for: " + type.format(tValue));
}
// Create first result interval
T lower = type.add(interval.min, offset);
T upper = type.add(interval.max, offset);
return new Interval<T>(this, (DataType<T>) type, lower, upper, interval.function);
}
