org.elasticsearch.search.aggregations.bucket.nested

Class NestedAggregator

java.lang.Object

org.elasticsearch.search.aggregations.BucketCollector

org.elasticsearch.search.aggregations.Aggregator

org.elasticsearch.search.aggregations.bucket.BucketsAggregator

org.elasticsearch.search.aggregations.bucket.SingleBucketAggregator

org.elasticsearch.search.aggregations.bucket.nested.NestedAggregator

All Implemented Interfaces:

AutoCloseable, Releasable, ReaderContextAware

public class NestedAggregator
extends SingleBucketAggregator
implements ReaderContextAware

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	NestedAggregator.Factory

Nested classes/interfaces inherited from class org.elasticsearch.search.aggregations.Aggregator

Aggregator.BucketAggregationMode, Aggregator.Parser, Aggregator.SubAggCollectionMode

Nested classes/interfaces inherited from class org.elasticsearch.search.aggregations.BucketCollector

BucketCollector.BucketAnalysisCollector

Field Summary

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

bigArrays, bucketAggregationMode, COLLECT_MODE, collectableSubAggregators, context, depth, estimatedBucketCount, factories, name, parent, subAggregators

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

NO_OP_COLLECTOR

Constructor Summary

Constructors

Constructor and Description
NestedAggregator(String name, AggregatorFactories factories, ObjectMapper objectMapper, AggregationContext aggregationContext, Aggregator parentAggregator)

Method Summary

Modifier and Type	Method and Description
InternalAggregation	buildAggregation(long owningBucketOrdinal)
InternalAggregation	buildEmptyAggregation()
void	collect(int parentDoc, long bucketOrd) Called during the query phase, to collect & aggregate the given document.
protected void	doClose() Release instance-specific data.
void	setNextReader(org.apache.lucene.index.AtomicReaderContext reader)

Methods inherited from class org.elasticsearch.search.aggregations.bucket.SingleBucketAggregator

shouldCollect

Methods inherited from class org.elasticsearch.search.aggregations.bucket.BucketsAggregator

bucketAggregations, bucketDocCount, bucketEmptyAggregations, close, collectBucket, collectBucketNoCounts, collectExistingBucket, getDocCounts, incrementBucketDocCount, maxBucketOrd

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

bucketAggregationMode, buildEmptySubAggregations, context, depth, doPostCollection, estimatedBucketCount, gatherAnalysis, hasParentBucketAggregator, name, parent, postCollection, preCollection, runDeferredCollections, shouldDefer, subAggregator, subAggregators

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

wrap

Methods inherited from class java.lang.Object

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

Constructor Detail

NestedAggregator

public NestedAggregator(String name,
                        AggregatorFactories factories,
                        ObjectMapper objectMapper,
                        AggregationContext aggregationContext,
                        Aggregator parentAggregator)

Method Detail

setNextReader

public void setNextReader(org.apache.lucene.index.AtomicReaderContext reader)

Specified by:

setNextReader in interface ReaderContextAware

collect

public void collect(int parentDoc,
                    long bucketOrd)
             throws IOException

Description copied from class: BucketCollector

Called during the query phase, to collect & aggregate the given document.

Specified by:

collect in class BucketCollector

bucketOrd - The ordinal of the bucket this aggregator belongs to, assuming this aggregator is not a top level aggregator. Typically, aggregators with #bucketAggregationMode set to Aggregator.BucketAggregationMode.MULTI_BUCKETS will heavily depend on this ordinal. Other aggregators may or may not use it and can see this ordinal as just an extra information for the aggregation context. For top level aggregators, the ordinal will always be equal to 0.

Throws:

IOException

doClose

protected void doClose()

Description copied from class: Aggregator

Release instance-specific data.

Overrides:

doClose in class Aggregator

buildAggregation

public InternalAggregation buildAggregation(long owningBucketOrdinal)

Specified by:

buildAggregation in class Aggregator

Returns:

The aggregated & built aggregation

buildEmptyAggregation

public InternalAggregation buildEmptyAggregation()

Specified by:

buildEmptyAggregation in class Aggregator