org.apache.lucene.facet.search

Class FastCountingFacetsAggregator

java.lang.Object

org.apache.lucene.facet.search.IntRollupFacetsAggregator

org.apache.lucene.facet.search.FastCountingFacetsAggregator

All Implemented Interfaces:

FacetsAggregator

public final class FastCountingFacetsAggregator
extends IntRollupFacetsAggregator

A FacetsAggregator which counts the number of times each category appears in the given set of documents. This aggregator reads the categories from the BinaryDocValues field defined by CategoryListParams.field, and assumes that the category ordinals were encoded with DGapVInt8IntEncoder.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

Constructors

Constructor and Description
FastCountingFacetsAggregator()

Method Summary

Methods

Modifier and Type	Method and Description
void	aggregate(FacetsCollector.MatchingDocs matchingDocs, CategoryListParams clp, FacetArrays facetArrays) Aggregate the facets found in the given matching documents.

Methods inherited from class org.apache.lucene.facet.search.IntRollupFacetsAggregator

createOrdinalValueResolver, requiresDocScores, rollupValues

Methods inherited from class java.lang.Object

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

Constructor Detail

FastCountingFacetsAggregator

public FastCountingFacetsAggregator()

Method Detail

aggregate

public final void aggregate(FacetsCollector.MatchingDocs matchingDocs,
             CategoryListParams clp,
             FacetArrays facetArrays)
                     throws IOException

Description copied from interface: FacetsAggregator

Aggregate the facets found in the given matching documents.

Specified by:

aggregate in interface FacetsAggregator

Specified by:

aggregate in class IntRollupFacetsAggregator

Throws:

IOException