org.apache.lucene.facet.sampling
Class TakmiSampleFixer

java.lang.Object
  org.apache.lucene.facet.sampling.SampleFixer
      org.apache.lucene.facet.sampling.TakmiSampleFixer

public class TakmiSampleFixer
extends SampleFixer

Fix sampling results by correct results, by counting the intersection between two lists: a TermDocs (list of documents in a certain category) and a DocIdSetIterator (list of documents matching the query).

This fixer is suitable for scenarios which prioritize accuracy over performance.

Note: for statistically more accurate top-k selection, set oversampleFactor to at least 2, so that the top-k categories would have better chance of showing up in the sampled top-cK results (see SamplingParams.getOversampleFactor()

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

Constructor Summary

TakmiSampleFixer(IndexReader indexReader, TaxonomyReader taxonomyReader, FacetSearchParams searchParams)

Method Summary

void	singleNodeFix(FacetResultNode facetResNode, ScoredDocIDs docIds, double samplingRatio) Fix the given node's value.

Methods inherited from class org.apache.lucene.facet.sampling.SampleFixer

fixResult, fixResultNode

Methods inherited from class java.lang.Object

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

Constructor Detail

TakmiSampleFixer

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

Method Detail

singleNodeFix

public void singleNodeFix(FacetResultNode facetResNode,
                          ScoredDocIDs docIds,
                          double samplingRatio)
                   throws IOException

Description copied from class: SampleFixer

Fix the given node's value.

Specified by:

singleNodeFix in class SampleFixer

Throws:

IOException