Examples of org.apache.lucene.facet.FacetsConfig

org.apache.lucene.facet.FacetsConfig
Records per-dimension configuration. By default a dimension is flat, single valued and does not require count for the dimension; use the setters in this class to change these settings for each dim.
NOTE: this configuration is not saved into the index, but it's vital, and up to the application to ensure, that at search time the provided {@code FacetsConfig} matches what was used during indexing. @lucene.experimental

    Directory indexDir = newDirectory();
    Directory taxoDir = newDirectory();
    
    DirectoryTaxonomyWriter taxoWriter = new DirectoryTaxonomyWriter(taxoDir);
    IndexWriter iw = new IndexWriter(indexDir, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())));
    FacetsConfig config = new FacetsConfig();
    config.setIndexFieldName("b", "$b");
    
    for(int i = atLeast(30); i > 0; --i) {
      Document doc = new Document();
      doc.add(new StringField("f", "v", Field.Store.NO));
      doc.add(new FacetField("a", "1"));
      doc.add(new FacetField("b", "1"));
      iw.addDocument(config.build(taxoWriter, doc));
    }
    
    DirectoryReader r = DirectoryReader.open(iw, true);
    DirectoryTaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);

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    Directory indexDir = newDirectory();
    Directory taxoDir = newDirectory();
    
    DirectoryTaxonomyWriter taxoWriter = new DirectoryTaxonomyWriter(taxoDir);
    IndexWriter iw = new IndexWriter(indexDir, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())));
    FacetsConfig config = new FacetsConfig();
    for(int i = atLeast(30); i > 0; --i) {
      Document doc = new Document();
      doc.add(new FacetField("a", "1"));
      doc.add(new FacetField("b", "1"));
      iw.addDocument(config.build(taxoWriter, doc));
    }
    
    DirectoryReader r = DirectoryReader.open(iw, true);
    DirectoryTaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);

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    Directory indexDir = newDirectory();
    Directory taxoDir = newDirectory();
    
    DirectoryTaxonomyWriter taxoWriter = new DirectoryTaxonomyWriter(taxoDir);
    IndexWriter iw = new IndexWriter(indexDir, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())));
    FacetsConfig config = new FacetsConfig();


    Document doc = new Document();
    doc.add(new FacetField("a", "1"));
    doc.add(new FacetField("b", "1"));
    iw.addDocument(config.build(taxoWriter, doc));
    
    DirectoryReader r = DirectoryReader.open(iw, true);
    DirectoryTaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);


    final FacetsCollector sfc = new FacetsCollector();

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    Directory indexDir = newDirectory();
    Directory taxoDir = newDirectory();
    
    DirectoryTaxonomyWriter taxoWriter = new DirectoryTaxonomyWriter(taxoDir);
    IndexWriter iw = new IndexWriter(indexDir, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())));
    FacetsConfig config = new FacetsConfig();
    for (int i = 0; i < 10; i++) {
      Document doc = new Document();
      doc.add(new FacetField("a", Integer.toString(i)));
      iw.addDocument(config.build(taxoWriter, doc));
    }
    
    DirectoryReader r = DirectoryReader.open(iw, true);
    DirectoryTaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);

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    IndexWriterConfig iwc = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()));
    iwc.setMergePolicy(NoMergePolicy.COMPOUND_FILES); // prevent merges
    IndexWriter indexWriter = new IndexWriter(indexDir, iwc);


    TaxonomyWriter taxoWriter = new DirectoryTaxonomyWriter(taxoDir);
    FacetsConfig config = new FacetsConfig();
    indexTwoDocs(taxoWriter, indexWriter, config, false); // 1st segment, no content, with categories
    indexTwoDocs(taxoWriter, indexWriter, null, true);         // 2nd segment, with content, no categories
    indexTwoDocs(taxoWriter, indexWriter, config, true);  // 3rd segment ok
    indexTwoDocs(taxoWriter, indexWriter, null, false);        // 4th segment, no content, or categories
    indexTwoDocs(taxoWriter, indexWriter, null, true);         // 5th segment, with content, no categories

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    Directory indexDir = newDirectory();
    Directory taxoDir = newDirectory();


    RandomIndexWriter w = new RandomIndexWriter(random(), indexDir);
    DirectoryTaxonomyWriter tw = new DirectoryTaxonomyWriter(taxoDir);
    FacetsConfig config = new FacetsConfig();
    int numDocs = atLeast(1000);
    int numDims = _TestUtil.nextInt(random(), 1, 7);
    List<TestDoc> testDocs = getRandomDocs(tokens, numDocs, numDims);
    for(TestDoc testDoc : testDocs) {
      Document doc = new Document();
      doc.add(newStringField("content", testDoc.content, Field.Store.NO));
      for(int j=0;j<numDims;j++) {
        if (testDoc.dims[j] != null) {
          doc.add(new FacetField("dim" + j, testDoc.dims[j]));
        }
      }
      w.addDocument(config.build(tw, doc));
    }


    // NRT open
    IndexSearcher searcher = newSearcher(w.getReader());

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    super.setup();
    if (config == null) {
      boolean withFacets = getRunData().getConfig().get("with.facets", true);
      if (withFacets) {
        FacetSource facetsSource = getRunData().getFacetSource();
        config = new FacetsConfig();
        facetsSource.configure(config);
      }
    }
  }

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  private final Directory taxoDir = new RAMDirectory();
  private final FacetsConfig config;


  /** Empty constructor */
  public AssociationsFacetsExample() {
    config = new FacetsConfig();
    config.setMultiValued("tags", true);
    config.setIndexFieldName("tags", "$tags");
    config.setMultiValued("genre", true);
    config.setIndexFieldName("genre", "$genre");
  }

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      termExpectedCounts.put(CP_D, termExpectedCounts.get(CP_D) + 1);
    }
  }


  private static FacetsConfig getConfig() {
    FacetsConfig config = new FacetsConfig();
    config.setMultiValued("A", true);
    config.setMultiValued("B", true);
    config.setRequireDimCount("B", true);
    config.setHierarchical("D", true);
    return config;
  }

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  private static void indexDocsWithFacetsNoTerms(IndexWriter indexWriter, TaxonomyWriter taxoWriter, 
                                                 Map<String,Integer> expectedCounts) throws IOException {
    Random random = random();
    int numDocs = atLeast(random, 2);
    FacetsConfig config = getConfig();
    for (int i = 0; i < numDocs; i++) {
      Document doc = new Document();
      addFacets(doc, config, false);
      indexWriter.addDocument(config.build(taxoWriter, doc));
    }
    indexWriter.commit(); // flush a segment
  }

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