org.elasticsearch.search.aggregations

Class Aggregator

java.lang.Object

org.elasticsearch.search.aggregations.BucketCollector

org.elasticsearch.search.aggregations.Aggregator

All Implemented Interfaces:

AutoCloseable, org.apache.lucene.search.Collector, Releasable

Direct Known Subclasses:

AggregatorBase, DeferringBucketCollector.WrappedAggregator

public abstract class Aggregator
extends BucketCollector
implements Releasable

An Aggregator.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Aggregator.Parser Parses the aggregation request and creates the appropriate aggregator factory for it.
static class	Aggregator.SubAggCollectionMode Aggregation mode for sub aggregations.

Field Summary

Fields inherited from class org.elasticsearch.search.aggregations.BucketCollector

NO_OP_COLLECTOR

Constructor Summary

Constructors

Constructor and Description
Aggregator()

Method Summary

Methods

Modifier and Type	Method and Description
abstract InternalAggregation	buildAggregation(long bucket) Build an aggregation for data that has been collected into bucket.
abstract InternalAggregation	buildEmptyAggregation() Build an empty aggregation.
abstract AggregationContext	context() Return the AggregationContext attached with this Aggregator.
static boolean	descendsFromBucketAggregator(Aggregator parent) Returns whether one of the parents is a BucketsAggregator.
abstract String	name() Return the name of this aggregator.
abstract Aggregator	parent() Return the parent aggregator.
abstract Aggregator	subAggregator(String name) Return the sub aggregator with the provided name.

Methods inherited from class org.elasticsearch.search.aggregations.BucketCollector

getLeafCollector, postCollection, preCollection, wrap

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.elasticsearch.common.lease.Releasable

close

Methods inherited from interface org.apache.lucene.search.Collector

needsScores

Constructor Detail

Aggregator

public Aggregator()

Method Detail

descendsFromBucketAggregator

public static boolean descendsFromBucketAggregator(Aggregator parent)

Returns whether one of the parents is a BucketsAggregator.

name

public abstract String name()

Return the name of this aggregator.

context

public abstract AggregationContext context()

Return the AggregationContext attached with this Aggregator.

parent

public abstract Aggregator parent()

Return the parent aggregator.

subAggregator

public abstract Aggregator subAggregator(String name)

Return the sub aggregator with the provided name.

buildAggregation

public abstract InternalAggregation buildAggregation(long bucket)
                                              throws IOException

Build an aggregation for data that has been collected into bucket.

Throws:

IOException

buildEmptyAggregation

public abstract InternalAggregation buildEmptyAggregation()

Build an empty aggregation.