Examples of org.apache.lucene.facet.Facets

org.apache.lucene.facet.Facets
Common base class for all facets implementations. @lucene.experimental


    FacetsCollector c = new FacetsCollector();
    searcher.search(new MatchAllDocsQuery(), c);    


    // Uses default $facets field:
    Facets facets;
    if (random().nextBoolean()) {
      facets = new FastTaxonomyFacetCounts(taxoReader, config, c);
    } else {
      OrdinalsReader ordsReader = new DocValuesOrdinalsReader();
      if (random().nextBoolean()) {
        ordsReader = new CachedOrdinalsReader(ordsReader);
      }
      facets = new TaxonomyFacetCounts(ordsReader, taxoReader, config, c);
    }


    // Ask for top 10 labels for any dims that have counts:
    List<FacetResult> results = facets.getAllDims(10);
    assertTrue(results.isEmpty());


    try {
      facets.getSpecificValue("a");
      fail("should have hit exc");
    } catch (IllegalArgumentException iae) {
      // expected
    }


    try {
      facets.getTopChildren(10, "a");
      fail("should have hit exc");
    } catch (IllegalArgumentException iae) {
      // expected
    }

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    // MatchAllDocsQuery is for "browsing" (counts facets
    // for all non-deleted docs in the index); normally
    // you'd use a "normal" query, and use MultiCollector to
    // wrap collecting the "normal" hits and also facets:
    searcher.search(new MatchAllDocsQuery(), c);
    Facets facets = getTaxonomyFacetCounts(taxoReader, config, c);


    try {
      facets.getSpecificValue("a");
      fail("didn't hit expected exception");
    } catch (IllegalArgumentException iae) {
      // expected
    }


    FacetResult result = facets.getTopChildren(10, "a");
    assertEquals(1, result.labelValues.length);
    assertEquals(1, result.labelValues[0].value.intValue());


    IOUtils.close(writer, taxoWriter, searcher.getIndexReader(), taxoReader, dir, taxoDir);
  }

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    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);


    FacetsCollector c = new FacetsCollector();
    searcher.search(new MatchAllDocsQuery(), c);
    
    Facets facets = getTaxonomyFacetCounts(taxoReader, config, c);
    assertEquals(1, facets.getSpecificValue("dim", "test\u001Fone"));
    assertEquals(1, facets.getSpecificValue("dim", "test\u001Etwo"));


    FacetResult result = facets.getTopChildren(10, "dim");
    assertEquals("dim=dim path=[] value=-1 childCount=2\n  test\u001Fone (1)\n  test\u001Etwo (1)\n", result.toString());
    IOUtils.close(writer, taxoWriter, searcher.getIndexReader(), taxoReader, dir, taxoDir);
  }

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    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);


    FacetsCollector c = new FacetsCollector();
    searcher.search(new MatchAllDocsQuery(), c);
    
    Facets facets = getTaxonomyFacetCounts(taxoReader, config, c);
    assertEquals(1, facets.getTopChildren(10, "dim").value);
    assertEquals(1, facets.getTopChildren(10, "dim2").value);
    assertEquals(1, facets.getTopChildren(10, "dim3").value);
    try {
      assertEquals(1, facets.getSpecificValue("dim"));
      fail("didn't hit expected exception");
    } catch (IllegalArgumentException iae) {
      // expected
    }
    assertEquals(1, facets.getSpecificValue("dim2"));
    assertEquals(1, facets.getSpecificValue("dim3"));
    IOUtils.close(writer, taxoWriter, searcher.getIndexReader(), taxoReader, dir, taxoDir);
  }

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    // MatchAllDocsQuery is for "browsing" (counts facets
    // for all non-deleted docs in the index); normally
    // you'd use a "normal" query, and use MultiCollector to
    // wrap collecting the "normal" hits and also facets:
    searcher.search(new MatchAllDocsQuery(), c);
    Facets facets = getTaxonomyFacetCounts(taxoReader, config, c);


    FacetResult result = facets.getTopChildren(Integer.MAX_VALUE, "dim");
    assertEquals(numLabels, result.labelValues.length);
    Set<String> allLabels = new HashSet<String>();
    for (LabelAndValue labelValue : result.labelValues) {
      allLabels.add(labelValue.label);
      assertEquals(1, labelValue.value.intValue());

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    DirectoryReader r = DirectoryReader.open(iw, true);
    DirectoryTaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);
    
    FacetsCollector sfc = new FacetsCollector();
    newSearcher(r).search(new MatchAllDocsQuery(), sfc);
    Facets facets1 = getTaxonomyFacetCounts(taxoReader, config, sfc);
    Facets facets2 = getTaxonomyFacetCounts(taxoReader, config, sfc, "$b");
    assertEquals(r.maxDoc(), facets1.getTopChildren(10, "a").value.intValue());
    assertEquals(r.maxDoc(), facets2.getTopChildren(10, "b").value.intValue());
    IOUtils.close(taxoWriter, iw, taxoReader, taxoDir, r, indexDir);
  }

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    DirectoryReader r = DirectoryReader.open(iw, true);
    DirectoryTaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);
    
    FacetsCollector sfc = new FacetsCollector();
    newSearcher(r).search(new MatchAllDocsQuery(), sfc);
    Facets facets = getTaxonomyFacetCounts(taxoReader, config, sfc);
    for (FacetResult result : facets.getAllDims(10)) {
      assertEquals(r.numDocs(), result.value.intValue());
    }
    
    IOUtils.close(taxoWriter, iw, taxoReader, taxoDir, r, indexDir);
  }

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    DirectoryTaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);


    final FacetsCollector sfc = new FacetsCollector();
    newSearcher(r).search(new MatchAllDocsQuery(), sfc);


    Facets facets = getTaxonomyFacetCounts(taxoReader, config, sfc);
    List<FacetResult> res1 = facets.getAllDims(10);
    List<FacetResult> res2 = facets.getAllDims(10);
    assertEquals("calling getFacetResults twice should return the .equals()=true result", res1, res2);
    
    IOUtils.close(taxoWriter, iw, taxoReader, taxoDir, r, indexDir);
  }

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    DirectoryReader r = DirectoryReader.open(iw, true);
    DirectoryTaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);
    
    FacetsCollector sfc = new FacetsCollector();
    newSearcher(r).search(new MatchAllDocsQuery(), sfc);
    Facets facets = getTaxonomyFacetCounts(taxoReader, config, sfc);
    
    assertEquals(10, facets.getTopChildren(2, "a").childCount);


    IOUtils.close(taxoWriter, iw, taxoReader, taxoDir, r, indexDir);
  }

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    // search for "f:a", only segments 1 and 3 should match results
    Query q = new TermQuery(new Term("f", "a"));
    FacetsCollector sfc = new FacetsCollector();
    indexSearcher.search(q, sfc);
    Facets facets = getTaxonomyFacetCounts(taxoReader, config, sfc);
    FacetResult result = facets.getTopChildren(10, "A");
    assertEquals("wrong number of children", 2, result.labelValues.length);
    for (LabelAndValue labelValue : result.labelValues) {
      assertEquals("wrong weight for child " + labelValue.label, 2, labelValue.value.intValue());
    }

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Related Classes of org.apache.lucene.facet.Facets

org.apache.lucene.demo.facet.AssociationsFacetsExample

org.apache.lucene.demo.facet.DistanceFacetsExample

org.apache.lucene.demo.facet.ExpressionAggregationFacetsExample

org.apache.lucene.demo.facet.MultiCategoryListsFacetsExample

org.apache.lucene.demo.facet.RangeFacetsExample

org.apache.lucene.demo.facet.SimpleFacetsExample

org.apache.lucene.demo.facet.SimpleSortedSetFacetsExample

org.apache.lucene.facet.range.TestRangeFacetCounts

org.apache.lucene.facet.sortedset.TestSortedSetDocValuesFacets

org.apache.lucene.facet.taxonomy.TestSearcherTaxonomyManager

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