Package org.apache.lucene.facet.taxonomy

Examples of org.apache.lucene.facet.taxonomy.TaxonomyReader$ChildrenIterator

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    Directory dir = newDirectory();
   
    DirectoryTaxonomyWriter taxoWriter = new DirectoryTaxonomyWriter(dir, OpenMode.CREATE_OR_APPEND, NO_OP_CACHE);
    touchTaxo(taxoWriter, new FacetLabel("a"));
   
    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(dir);

    touchTaxo(taxoWriter, new FacetLabel("b"));
   
    TaxonomyReader newtr = TaxonomyReader.openIfChanged(taxoReader);
    taxoReader.close();
    taxoReader = newtr;
    assertEquals(1, Integer.parseInt(taxoReader.getCommitUserData().get(DirectoryTaxonomyWriter.INDEX_EPOCH)));

    // now recreate the taxonomy, and check that the epoch is preserved after opening DirTW again.
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    assertEquals(ordinal, taxoWriter.addCategory(cp));
   
    IOUtils.close(indexWriter, taxoWriter);
   
    DirectoryReader indexReader = DirectoryReader.open(indexDir);
    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    DrillDownQuery ddq = new DrillDownQuery(new FacetsConfig());
    ddq.add("dim", bigs);
    assertEquals(1, searcher.search(ddq, 10).totalHits);
   
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  /** User runs a query and counts facets. */
  private List<FacetResult> search() throws IOException {
    DirectoryReader indexReader = DirectoryReader.open(indexDir);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);

    FacetsCollector fc = new FacetsCollector();

    // MatchAllDocsQuery is for "browsing" (counts facets
    // for all non-deleted docs in the index); normally
    // you'd use a "normal" query:
    FacetsCollector.search(searcher, new MatchAllDocsQuery(), 10, fc);

    // Retrieve results
    List<FacetResult> results = new ArrayList<FacetResult>();

    // Count both "Publish Date" and "Author" dimensions
    Facets facets = new FastTaxonomyFacetCounts(taxoReader, config, fc);
    results.add(facets.getTopChildren(10, "Author"));
    results.add(facets.getTopChildren(10, "Publish Date"));
   
    indexReader.close();
    taxoReader.close();
   
    return results;
  }
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  /** User drills down on 'Publish Date/2010', and we
   *  return facets for 'Author' */
  private FacetResult drillDown() throws IOException {
    DirectoryReader indexReader = DirectoryReader.open(indexDir);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);

    // Passing no baseQuery means we drill down on all
    // documents ("browse only"):
    DrillDownQuery q = new DrillDownQuery(config);

    // Now user drills down on Publish Date/2010:
    q.add("Publish Date", "2010");
    FacetsCollector fc = new FacetsCollector();
    FacetsCollector.search(searcher, q, 10, fc);

    // Retrieve results
    Facets facets = new FastTaxonomyFacetCounts(taxoReader, config, fc);
    FacetResult result = facets.getTopChildren(10, "Author");

    indexReader.close();
    taxoReader.close();
   
    return result;
  }
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   *  return facets for both 'Publish Date' and 'Author',
   *  using DrillSideways. */
  private List<FacetResult> drillSideways() throws IOException {
    DirectoryReader indexReader = DirectoryReader.open(indexDir);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);

    // Passing no baseQuery means we drill down on all
    // documents ("browse only"):
    DrillDownQuery q = new DrillDownQuery(config);

    // Now user drills down on Publish Date/2010:
    q.add("Publish Date", "2010");

    DrillSideways ds = new DrillSideways(searcher, config, taxoReader);
    DrillSidewaysResult result = ds.search(q, 10);

    // Retrieve results
    List<FacetResult> facets = result.facets.getAllDims(10);

    indexReader.close();
    taxoReader.close();
   
    return facets;
  }
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  /** User runs a query and counts facets. */
  private List<FacetResult> search() throws IOException {
    DirectoryReader indexReader = DirectoryReader.open(indexDir);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);

    FacetsCollector fc = new FacetsCollector();

    // MatchAllDocsQuery is for "browsing" (counts facets
    // for all non-deleted docs in the index); normally
    // you'd use a "normal" query:
    FacetsCollector.search(searcher, new MatchAllDocsQuery(), 10, fc);

    // Retrieve results
    List<FacetResult> results = new ArrayList<FacetResult>();

    // Count both "Publish Date" and "Author" dimensions
    Facets author = new FastTaxonomyFacetCounts("author", taxoReader, config, fc);
    results.add(author.getTopChildren(10, "Author"));

    Facets pubDate = new FastTaxonomyFacetCounts("pubdate", taxoReader, config, fc);
    results.add(pubDate.getTopChildren(10, "Publish Date"));
   
    indexReader.close();
    taxoReader.close();
   
    return results;
  }
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    IndexReader ir = iw.getReader();
    tw.commit();

    // prepare index reader and taxonomy.
    TaxonomyReader tr = new DirectoryTaxonomyReader(taxoDir);

    // prepare searcher to search against
    IndexSearcher searcher = newSearcher(ir);

    FacetsCollector sfc = performSearch(tr, ir, searcher);
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    IndexReader ir = iw.getReader();
    tw.commit();

    // prepare index reader and taxonomy.
    TaxonomyReader tr = new DirectoryTaxonomyReader(taxoDir);

    // prepare searcher to search against
    IndexSearcher searcher = newSearcher(ir);

    FacetsCollector sfc = performSearch(tr, ir, searcher);
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    IndexReader ir = iw.getReader();
    tw.commit();

    // prepare index reader and taxonomy.
    TaxonomyReader tr = new DirectoryTaxonomyReader(taxoDir);

    // prepare searcher to search against
    IndexSearcher searcher = newSearcher(ir);

    FacetsCollector sfc = performSearch(tr, ir, searcher);
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    IndexReader ir = iw.getReader();
    tw.commit();

    // prepare index reader and taxonomy.
    TaxonomyReader tr = new DirectoryTaxonomyReader(taxoDir);

    // prepare searcher to search against
    IndexSearcher searcher = newSearcher(ir);

    FacetsCollector sfc = performSearch(tr, ir, searcher);
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