org.apache.lucene.facet.search
Class AdaptiveFacetsAccumulator

java.lang.Object
  org.apache.lucene.facet.search.FacetsAccumulator
      org.apache.lucene.facet.search.StandardFacetsAccumulator
          org.apache.lucene.facet.search.AdaptiveFacetsAccumulator

public final class AdaptiveFacetsAccumulator
extends StandardFacetsAccumulator

FacetsAccumulator whose behavior regarding complements, sampling, etc. is not set up front but rather is determined at accumulation time according to the statistics of the accumulated set of documents and the index.

Note: Sampling accumulation (Accumulation over a sampled-set of the results), does not guarantee accurate values for FacetResult.getNumValidDescendants() & FacetResultNode.getResidue().

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

Field Summary

Fields inherited from class org.apache.lucene.facet.search.StandardFacetsAccumulator

floatArrayAllocator, intArrayAllocator, isUsingComplements, maxPartitions, partitionSize

Fields inherited from class org.apache.lucene.facet.search.FacetsAccumulator

DEFAULT_COMPLEMENT_THRESHOLD, DISABLE_COMPLEMENT, FORCE_COMPLEMENT, indexReader, searchParams, taxonomyReader

Constructor Summary

AdaptiveFacetsAccumulator(FacetSearchParams searchParams, IndexReader indexReader, TaxonomyReader taxonomyReader)
Create an AdaptiveFacetsAccumulator

AdaptiveFacetsAccumulator(FacetSearchParams searchParams, IndexReader indexReader, TaxonomyReader taxonomyReader, IntArrayAllocator intArrayAllocator, FloatArrayAllocator floatArrayAllocator)
Create an AdaptiveFacetsAccumulator

Method Summary

List<FacetResult>	accumulate(ScoredDocIDs docids) Accumulate facets over given documents, according to facet requests in effect.
Sampler	getSampler()
void	setSampler(Sampler sampler) Set the sampler.

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

actualDocsToAccumulate, getCategoryListMap, getTotalCountsFactor, shouldComplement

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

getComplementThreshold, isAllowLabeling, mayComplement, setAllowLabeling, setComplementThreshold

Methods inherited from class java.lang.Object

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

Constructor Detail

AdaptiveFacetsAccumulator

public AdaptiveFacetsAccumulator(FacetSearchParams searchParams,
                                 IndexReader indexReader,
                                 TaxonomyReader taxonomyReader)

Create an AdaptiveFacetsAccumulator

See Also:

StandardFacetsAccumulator.StandardFacetsAccumulator(FacetSearchParams, IndexReader, TaxonomyReader)

AdaptiveFacetsAccumulator

public AdaptiveFacetsAccumulator(FacetSearchParams searchParams,
                                 IndexReader indexReader,
                                 TaxonomyReader taxonomyReader,
                                 IntArrayAllocator intArrayAllocator,
                                 FloatArrayAllocator floatArrayAllocator)

Create an AdaptiveFacetsAccumulator

See Also:

StandardFacetsAccumulator.StandardFacetsAccumulator(FacetSearchParams, IndexReader, TaxonomyReader, IntArrayAllocator, FloatArrayAllocator)

Method Detail

setSampler

public void setSampler(Sampler sampler)

Set the sampler.

Parameters:

sampler - sampler to set

accumulate

public List<FacetResult> accumulate(ScoredDocIDs docids)
                             throws IOException

Description copied from class: FacetsAccumulator

Accumulate facets over given documents, according to facet requests in effect.

Overrides:

accumulate in class StandardFacetsAccumulator

Parameters:

docids - documents (and their scores) for which facets are Accumulated.

Returns:

Accumulated facets.

Throws:

IOException - on error.

getSampler

public final Sampler getSampler()

Returns:

the sampler in effect