@Override
public Facet reduce(List<Facet> facets) {
if (facets.size() == 1) {
return facets.get(0);
}
InternalLongTermsFacet first = null;
TLongIntHashMap aggregated = CacheRecycler.popLongIntMap();
long missing = 0;
long total = 0;
for (Facet facet : facets) {
TermsFacet termsFacet = (TermsFacet) facet;
// termsFacet could be of type InternalStringTermsFacet representing unmapped fields
if (first == null && termsFacet instanceof InternalLongTermsFacet) {
first = (InternalLongTermsFacet) termsFacet;
}
missing += termsFacet.getMissingCount();
total += termsFacet.getTotalCount();
for (Entry entry : termsFacet.getEntries()) {
aggregated.adjustOrPutValue(((LongEntry) entry).term, entry.getCount(), entry.getCount());
}
}
BoundedTreeSet<LongEntry> ordered =
new BoundedTreeSet<LongEntry>(first.comparatorType.comparator(), first.requiredSize);
for (TLongIntIterator it = aggregated.iterator(); it.hasNext(); ) {
it.advance();
ordered.add(new LongEntry(it.key(), it.value()));
}
first.entries = ordered;
first.missing = missing;
first.total = total;
CacheRecycler.pushLongIntMap(aggregated);
return first;
}
public static InternalLongTermsFacet readTermsFacet(StreamInput in) throws IOException {
InternalLongTermsFacet facet = new InternalLongTermsFacet();
facet.readFrom(in);
return facet;
}