/**
* Constructs a new Aggregator.
*
* @param name The name of the aggregation
* @param bucketAggregationMode The nature of execution as a sub-aggregator (see {@link
* BucketAggregationMode})
* @param factories The factories for all the sub-aggregators under this aggregator
* @param estimatedBucketsCount When served as a sub-aggregator, indicate how many buckets the
* parent aggregator will generate.
* @param context The aggregation context
* @param parent The parent aggregator (may be {@code null} for top level aggregators)
*/
protected Aggregator(
String name,
BucketAggregationMode bucketAggregationMode,
AggregatorFactories factories,
long estimatedBucketsCount,
AggregationContext context,
Aggregator parent) {
this.name = name;
this.parent = parent;
this.estimatedBucketCount = estimatedBucketsCount;
this.context = context;
this.bigArrays = context.bigArrays();
this.depth = parent == null ? 0 : 1 + parent.depth();
this.bucketAggregationMode = bucketAggregationMode;
assert factories != null
: "sub-factories provided to BucketAggregator must not be null, use AggragatorFactories.EMPTY instead";
this.factories = factories;
this.subAggregators = factories.createSubAggregators(this, estimatedBucketsCount);
collectableSugAggregators =
BucketCollector.wrap(
Iterables.filter(Arrays.asList(subAggregators), COLLECTABLE_AGGREGATOR));
context.searchContext().addReleasable(this, Lifetime.PHASE);
}
/** Called after collection of all document is done. */
public final void postCollection() throws IOException {
collectableSugAggregators.postCollection();
doPostCollection();
}
