protected RolloutGroupsValidation validateTargetsInGroups(final List<RolloutGroup> groups, final String baseFilter,
final long totalTargets) {
final List<Long> groupTargetCounts = new ArrayList<>(groups.size());
final Map<String, Long> targetFilterCounts = groups.stream()
.map(group -> RolloutHelper.getGroupTargetFilter(baseFilter, group)).distinct()
.collect(Collectors.toMap(Function.identity(), targetManagement::countByRsql));
long unusedTargetsCount = 0;
for (int i = 0; i < groups.size(); i++) {
final RolloutGroup group = groups.get(i);
final String groupTargetFilter = RolloutHelper.getGroupTargetFilter(baseFilter, group);
RolloutHelper.verifyRolloutGroupTargetPercentage(group.getTargetPercentage());
final long targetsInGroupFilter = targetFilterCounts.get(groupTargetFilter);
final long overlappingTargets = countOverlappingTargetsWithPreviousGroups(baseFilter, groups, group, i,
targetFilterCounts);
final long realTargetsInGroup;
if (overlappingTargets > 0 && unusedTargetsCount > 0) {
realTargetsInGroup = targetsInGroupFilter - overlappingTargets + unusedTargetsCount;
unusedTargetsCount = 0;
} else {
realTargetsInGroup = targetsInGroupFilter - overlappingTargets;
}
final long reducedTargetsInGroup = Math
.round(group.getTargetPercentage() / 100 * (double) realTargetsInGroup);
groupTargetCounts.add(reducedTargetsInGroup);
unusedTargetsCount += realTargetsInGroup - reducedTargetsInGroup;
}
return new RolloutGroupsValidation(totalTargets, groupTargetCounts);
}