/**
* Takes a list of lower bounds and a list of corresponding upper bounds of ranges and checks if
* there are overlapping ranges.
*
* <p>Note: lowerBounds and upperBounds must have the same length
*
* @param resultRanges the result ranges to check
* @return true if at least one range overlaps another, false otherwise
*/
private boolean rangesOverlapping(List<AlternativeResultRange> resultRanges) {
// Sort by upper bound
Collections.sort(
resultRanges,
new Comparator<AlternativeResultRange>() {
@Override
public int compare(AlternativeResultRange o1, AlternativeResultRange o2) {
return Double.compare(o1.getUpperBound(), o2.getUpperBound());
}
});
double lastUpperBound = Double.NEGATIVE_INFINITY;
for (AlternativeResultRange resultRange : resultRanges) {
if (resultRange.getLowerBound() < lastUpperBound) {
return true;
}
lastUpperBound = resultRange.getUpperBound();
}
return false;
}
/**
* Updates the lower and upper bounds for each alternative to reflect potential minimum and
* maximum weighted results in case the provided leaves are set to their potential minimum and
* maximum values respectively.
*
* @param leafSet leaves for the plan to consider
* @param resultRanges the result ranges to update
*/
private void updateBounds(
final Set<VPlanLeaf> leafSet, List<AlternativeResultRange> resultRanges) {
for (VPlanLeaf leaf : leafSet) {
double leafMinimum = leaf.getPotentialMinimum();
double leafMaximum = leaf.getPotentialMaximum();
for (AlternativeResultRange resultRange : resultRanges) {
resultRange.setLowerBound(
resultRange.getLowerBound()
- ((resultRange.getResult() - leafMinimum) * leaf.getTotalWeight()));
resultRange.setUpperBound(
resultRange.getUpperBound()
+ ((leafMaximum - resultRange.getResult()) * leaf.getTotalWeight()));
}
}
}
