Examples of org.apache.lucene.facet.sampling.SamplingAccumulator

Package org.apache.lucene.facet.sampling

Examples of org.apache.lucene.facet.sampling.SamplingAccumulator

org.apache.lucene.facet.sampling.SamplingAccumulator
Facets accumulation with sampling.

Note two major differences between this class and {@link SamplingWrapper}:
1. Latter can wrap any other {@link FacetsAccumulator} while this classdirectly extends {@link OldFacetsAccumulator}.
2. This class can effectively apply sampling on the complement set of matching document, thereby working efficiently with the complement optimization - see {@link OldFacetsAccumulator#getComplementThreshold()}.
Note: Sampling accumulation (Accumulation over a sampled-set of the results), does not guarantee accurate values for {@link FacetResult#getNumValidDescendants()}. @see Sampler @lucene.experimental

    // Verify that sampling is enabled and required ... otherwise do default
    if (sampler == null || !sampler.shouldSample(docids)) {
      return this;
    }
    
    SamplingAccumulator samplingAccumulator = new SamplingAccumulator(sampler, searchParams, indexReader, taxonomyReader);
    samplingAccumulator.setComplementThreshold(getComplementThreshold());
    return samplingAccumulator;
  }

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    final Sampler sampler = new RandomSampler(sampleParams, random());
    
    TaxonomyFacetsAccumulator[] accumulators = new TaxonomyFacetsAccumulator[] {
      new TaxonomyFacetsAccumulator(fsp, indexReader, taxoReader),
      new OldFacetsAccumulator(fsp, indexReader, taxoReader),
      new SamplingAccumulator(sampler, fsp, indexReader, taxoReader),
      new AdaptiveFacetsAccumulator(fsp, indexReader, taxoReader),
      new SamplingWrapper(new OldFacetsAccumulator(fsp, indexReader, taxoReader), sampler)
    };
    
    for (TaxonomyFacetsAccumulator fa : accumulators) {

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  /** search reader <code>r</code>*/
  private FacetResult searchWithFacets(IndexReader r, TaxonomyReader tr, FacetSearchParams fsp, 
      final SamplingParams params) throws IOException {
    // a FacetsCollector with a sampling accumulator
    Sampler sampler = new RandomSampler(params, random());
    StandardFacetsAccumulator sfa = new SamplingAccumulator(sampler, fsp, r, tr);
    FacetsCollector fcWithSampling = FacetsCollector.create(sfa);
    
    IndexSearcher s = new IndexSearcher(r);
    s.search(new MatchAllDocsQuery(), fcWithSampling);

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    final Sampler sampler = new RandomSampler(sampleParams, random());
    
    TaxonomyFacetsAccumulator[] accumulators = new TaxonomyFacetsAccumulator[] {
      new TaxonomyFacetsAccumulator(fsp, indexReader, taxoReader),
      new OldFacetsAccumulator(fsp, indexReader, taxoReader),
      new SamplingAccumulator(sampler, fsp, indexReader, taxoReader),
      new AdaptiveFacetsAccumulator(fsp, indexReader, taxoReader),
      new SamplingWrapper(new OldFacetsAccumulator(fsp, indexReader, taxoReader), sampler)
    };
    
    for (TaxonomyFacetsAccumulator fa : accumulators) {

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    final Sampler sampler = new RandomSampler(sampleParams, random());
    
    FacetsAccumulator[] accumulators = new FacetsAccumulator[] {
      new FacetsAccumulator(fsp, indexReader, taxoReader),
      new StandardFacetsAccumulator(fsp, indexReader, taxoReader),
      new SamplingAccumulator(sampler, fsp, indexReader, taxoReader),
      new AdaptiveFacetsAccumulator(fsp, indexReader, taxoReader),
      new SamplingWrapper(new StandardFacetsAccumulator(fsp, indexReader, taxoReader), sampler)
    };
    
    for (FacetsAccumulator fa : accumulators) {

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  /** search reader <code>r</code>*/
  private FacetResult searchWithFacets(IndexReader r, TaxonomyReader tr, FacetSearchParams fsp, 
      final SamplingParams params) throws IOException {
    // a FacetsCollector with a sampling accumulator
    Sampler sampler = new RandomSampler(params, random());
    StandardFacetsAccumulator sfa = new SamplingAccumulator(sampler, fsp, r, tr);
    FacetsCollector fcWithSampling = FacetsCollector.create(sfa);
    
    IndexSearcher s = newSearcher(r);
    s.search(new MatchAllDocsQuery(), fcWithSampling);

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public class SamplingAccumulatorTest extends BaseSampleTestTopK {


  @Override
  protected StandardFacetsAccumulator getSamplingAccumulator(Sampler sampler, TaxonomyReader taxoReader, 
      IndexReader indexReader, FacetSearchParams searchParams) {
    return new SamplingAccumulator(sampler, searchParams, indexReader, taxoReader);
  }

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    // Verify that sampling is enabled and required ... otherwise do default
    if (sampler == null || !sampler.shouldSample(docids)) {
      return this;
    }
    
    SamplingAccumulator samplingAccumulator = new SamplingAccumulator(sampler, searchParams, indexReader, taxonomyReader);
    samplingAccumulator.setComplementThreshold(getComplementThreshold());
    return samplingAccumulator;
  }

View Full Code Here

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Related Classes of org.apache.lucene.facet.sampling.SamplingAccumulator

org.apache.lucene.facet.old.AdaptiveFacetsAccumulator

org.apache.lucene.facet.params.FacetSearchParams

org.apache.lucene.facet.partitions.PartitionsFacetResultsHandler

org.apache.lucene.facet.sampling.OversampleWithDepthTest

org.apache.lucene.facet.sampling.Sampler.SampleResult

org.apache.lucene.facet.sampling.SamplingAccumulatorTest

org.apache.lucene.facet.search.AdaptiveFacetsAccumulator

org.apache.lucene.facet.search.FacetRequest

org.apache.lucene.facet.search.TestFacetsCollector

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