/**
* @return zero-based indices that should also be removed due to cascading. (These will already
* have had 1 subtracted from them, since we know that a search from above is being deleted)
*/
private synchronized List<Integer> removeSearchItemHelper(int i) {
// 1. Decrement any number in a CohortHistoryCompositionFilter that's greater than i.
// 2. If any CohortHistoryCompositionFilter references search i, we'll have to cascade delete it
List<Integer> ret = new ArrayList<Integer>();
for (int j = i + 1; j < searchHistory.size(); ++j) {
PatientSearch ps = searchHistory.get(j);
if (ps.isComposition()) {
cachedFilters.set(i, null); // this actually only needs to happen if the filter is affected
// note that i is zero-based, but in a composition filter it would be one-based
boolean removeMeToo = ps.removeFromHistoryNotify(i + 1);
if (removeMeToo) ret.add(j - 1);
}
}
return ret;
}
