public ResponseLinking copyWithFilteredResponses(final Predicate<Response> toKeepCondition) {
final Set<Response> newIncompletes = Sets.filter(incompleteResponses(), toKeepCondition);
final ImmutableSet.Builder<ResponseSet> newResponseSetsB = ImmutableSet.builder();
final ImmutableBiMap.Builder<String, ResponseSet> responseSetsIdB = ImmutableBiMap.builder();
// to account for ResponseSets merging due to lost annotation
final Set<ResponseSet> alreadyAdded = Sets.newHashSet();
for (final ResponseSet responseSet : responseSets()) {
final ImmutableSet<Response> okResponses =
FluentIterable.from(responseSet.asSet()).filter(toKeepCondition).toSet();
if (!okResponses.isEmpty()) {
final ResponseSet newResponseSet = ResponseSet.from(okResponses);
if (alreadyAdded.contains(newResponseSet)) {
continue;
}
alreadyAdded.add(newResponseSet);
newResponseSetsB.add(newResponseSet);
if (responseSetIds().isPresent()) {
responseSetsIdB.put(responseSetIds().get().inverse().get(responseSet), newResponseSet);
}
}
}
final ImmutableSet<ResponseSet> newResponseSets = newResponseSetsB.build();
final ResponseLinking.Builder ret =
ResponseLinking.builder()
.docID(docID())
.responseSets(newResponseSets)
.incompleteResponses(newIncompletes);
if (responseSetIds().isPresent()) {
ret.responseSetIds(responseSetsIdB.build());
}
return ret.build();
}
