@Override
public InternalAggregation buildAggregation(long owningBucketOrdinal) {
assert owningBucketOrdinal == 0;
List<InternalHistogram.Bucket> buckets =
new ArrayList<InternalHistogram.Bucket>((int) bucketOrds.size());
for (long i = 0; i < bucketOrds.capacity(); ++i) {
final long ord = bucketOrds.id(i);
if (ord < 0) {
continue; // slot is not allocated
}
buckets.add(
histogramFactory.createBucket(
rounding.valueForKey(bucketOrds.key(i)),
bucketDocCount(ord),
bucketAggregations(ord),
valuesSource.formatter()));
}
CollectionUtil.introSort(buckets, order.comparator());
// value source will be null for unmapped fields
ValueFormatter formatter = valuesSource != null ? valuesSource.formatter() : null;
InternalHistogram.EmptyBucketInfo emptyBucketInfo =
minDocCount == 0
? new InternalHistogram.EmptyBucketInfo(rounding, buildEmptySubAggregations())
: null;
return histogramFactory.create(
name, buckets, order, minDocCount, emptyBucketInfo, formatter, keyed);
}
@Override
public void collect(int doc, long owningBucketOrdinal) throws IOException {
assert owningBucketOrdinal == 0;
final int valuesCount = values.setDocument(doc);
long previousKey = Long.MIN_VALUE;
for (int i = 0; i < valuesCount; ++i) {
long value = values.nextValue();
long key = rounding.roundKey(value);
assert key >= previousKey;
if (key == previousKey) {
continue;
}
long bucketOrd = bucketOrds.add(key);
if (bucketOrd < 0) { // already seen
bucketOrd = -1 - bucketOrd;
}
collectBucket(doc, bucketOrd);
previousKey = key;
}
}