org.apache.lucene.facet.DrillDownQuery Java Examples

/** 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;
}
 

/** User drills down on 'Publish Date/2010', and we
 *  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;
}
 

/** User drills down on 'Publish Year/2010'. */
private FacetResult drillDown() throws IOException {
  DirectoryReader indexReader = DirectoryReader.open(indexDir);
  IndexSearcher searcher = new IndexSearcher(indexReader);
  SortedSetDocValuesReaderState state = new DefaultSortedSetDocValuesReaderState(indexReader);

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

  // Retrieve results
  Facets facets = new SortedSetDocValuesFacetCounts(state, fc);
  FacetResult result = facets.getTopChildren(10, "Author");
  indexReader.close();
  
  return result;
}
 

/** User drills down on 'tags/solr'. */
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("tags", "solr");
  FacetsCollector fc = new FacetsCollector();
  FacetsCollector.search(searcher, q, 10, fc);

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

  indexReader.close();
  taxoReader.close();
  
  return result;
}
 

/** User drills down on 'Publish Year/2010'. */
private FacetResult drillDown() throws IOException {
	DirectoryReader indexReader = DirectoryReader.open(directory);
	IndexSearcher searcher = new IndexSearcher(indexReader);
	SortedSetDocValuesReaderState state = new DefaultSortedSetDocValuesReaderState(indexReader);
	
	// Now user drills down on Publish Year/2010:
	DrillDownQuery q = new DrillDownQuery(config);
	q.add("Publish Year", "2010");
	FacetsCollector fc = new FacetsCollector();
	FacetsCollector.search(searcher, q, 10, fc);
	
	// Retrieve results
	Facets facets = new SortedSetDocValuesFacetCounts(state, fc);
	FacetResult result = facets.getTopChildren(10, "Author");
	indexReader.close();
	
	return result;
}
 

/** User drills down on the specified range. */
public TopDocs drillDown(LongRange range) throws IOException {

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

  q.add("timestamp", LongPoint.newRangeQuery("timestamp", range.min, range.max));
  return searcher.search(q, 10);
}
 

@Override
public Boolean call() throws Exception {
  if (indexReader == null) {
    indexReader = DirectoryReader.open(indexDir);
    lastIndexGeneration = indexReader.getIndexCommit().getGeneration();
    taxoReader = new DirectoryTaxonomyReader(taxoDir);
  } else {
    // verify search index
    DirectoryReader newReader = DirectoryReader.openIfChanged(indexReader);
    assertNotNull("should not have reached here if no changes were made to the index", newReader);
    long newGeneration = newReader.getIndexCommit().getGeneration();
    assertTrue("expected newer generation; current=" + lastIndexGeneration + " new=" + newGeneration, newGeneration > lastIndexGeneration);
    indexReader.close();
    indexReader = newReader;
    lastIndexGeneration = newGeneration;
    TestUtil.checkIndex(indexDir);
    
    // verify taxonomy index
    DirectoryTaxonomyReader newTaxoReader = TaxonomyReader.openIfChanged(taxoReader);
    if (newTaxoReader != null) {
      taxoReader.close();
      taxoReader = newTaxoReader;
    }
    TestUtil.checkIndex(taxoDir);
    
    // verify faceted search
    int id = Integer.parseInt(indexReader.getIndexCommit().getUserData().get(VERSION_ID), 16);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    FacetsCollector fc = new FacetsCollector();
    searcher.search(new MatchAllDocsQuery(), fc);
    Facets facets = new FastTaxonomyFacetCounts(taxoReader, config, fc);
    assertEquals(1, facets.getSpecificValue("A", Integer.toString(id, 16)).intValue());
    
    DrillDownQuery drillDown = new DrillDownQuery(config);
    drillDown.add("A", Integer.toString(id, 16));
    TopDocs docs = searcher.search(drillDown, 10);
    assertEquals(1, docs.totalHits.value);
  }
  return null;
}
 

public void testIntSumAssociationDrillDown() throws Exception {
  FacetsCollector fc = new FacetsCollector();
  
  IndexSearcher searcher = newSearcher(reader);
  DrillDownQuery q = new DrillDownQuery(config);
  q.add("int", "b");
  searcher.search(q, fc);

  Facets facets = new TaxonomyFacetSumIntAssociations("$facets.int", taxoReader, config, fc);
  assertEquals("dim=int path=[] value=-1 childCount=2\n  b (150)\n  a (100)\n", facets.getTopChildren(10, "int").toString());
  assertEquals("Wrong count for category 'a'!", 100, facets.getSpecificValue("int", "a").intValue());
  assertEquals("Wrong count for category 'b'!", 150, facets.getSpecificValue("int", "b").intValue());
}