@Override
public BulkScorer bulkScorer(LeafReaderContext context) throws IOException {
if (used.compareAndSet(false, true)) {
policy.onUse(getQuery());
}
DocIdSet docIdSet = get(in.getQuery(), context);
if (docIdSet == null) {
if (shouldCache(context)) {
docIdSet = cache(context);
putIfAbsent(in.getQuery(), context, docIdSet);
} else {
return in.bulkScorer(context);
}
}
assert docIdSet != null;
if (docIdSet == DocIdSet.EMPTY) {
return null;
}
final DocIdSetIterator disi = docIdSet.iterator();
if (disi == null) {
return null;
}
return new DefaultBulkScorer(new ConstantScoreScorer(this, 0f, disi));
}
private boolean shouldCache(LeafReaderContext context) throws IOException {
return cacheEntryHasReasonableWorstCaseSize(
ReaderUtil.getTopLevelContext(context).reader().maxDoc())
&& policy.shouldCache(in.getQuery(), context);
}
