Java Code Examples for org.apache.lucene.search.MultiCollector

The following examples show how to use org.apache.lucene.search.MultiCollector. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: lucene-solr   Source File: Grouping.java    License: Apache License 2.0 6 votes vote down vote up
@Override
protected Collector createFirstPassCollector() throws IOException {
  DocSet groupFilt = searcher.getDocSet(query);
  int groupDocsToCollect = getMax(groupOffset, docsPerGroup, maxDoc);
  Collector subCollector;
  if (withinGroupSort == null || withinGroupSort.equals(Sort.RELEVANCE)) {
    subCollector = topCollector = TopScoreDocCollector.create(groupDocsToCollect, Integer.MAX_VALUE);
  } else {
    topCollector = TopFieldCollector.create(searcher.weightSort(withinGroupSort), groupDocsToCollect, Integer.MAX_VALUE);
    if (needScores) {
      maxScoreCollector = new MaxScoreCollector();
      subCollector = MultiCollector.wrap(topCollector, maxScoreCollector);
    } else {
      subCollector = topCollector;
    }
  }
  collector = new FilterCollector(groupFilt, subCollector);
  return collector;
}
 
Example 2
Source Project: lucene-solr   Source File: CommandHandler.java    License: Apache License 2.0 6 votes vote down vote up
private DocSet computeGroupedDocSet(Query query, ProcessedFilter filter, List<Collector> collectors) throws IOException {
  @SuppressWarnings({"rawtypes"})
  Command firstCommand = commands.get(0);
  String field = firstCommand.getKey();
  SchemaField sf = searcher.getSchema().getField(field);
  FieldType fieldType = sf.getType();
  
  @SuppressWarnings({"rawtypes"})
  final AllGroupHeadsCollector allGroupHeadsCollector;
  if (fieldType.getNumberType() != null) {
    ValueSource vs = fieldType.getValueSource(sf, null);
    allGroupHeadsCollector = AllGroupHeadsCollector.newCollector(new ValueSourceGroupSelector(vs, new HashMap<>()),
        firstCommand.getWithinGroupSort());
  } else {
    allGroupHeadsCollector
        = AllGroupHeadsCollector.newCollector(new TermGroupSelector(firstCommand.getKey()), firstCommand.getWithinGroupSort());
  }
  if (collectors.isEmpty()) {
    searchWithTimeLimiter(query, filter, allGroupHeadsCollector);
  } else {
    collectors.add(allGroupHeadsCollector);
    searchWithTimeLimiter(query, filter, MultiCollector.wrap(collectors.toArray(new Collector[collectors.size()])));
  }

  return new BitDocSet(allGroupHeadsCollector.retrieveGroupHeads(searcher.maxDoc()));
}
 
Example 3
Source Project: lucene-solr   Source File: QueryCommand.java    License: Apache License 2.0 6 votes vote down vote up
@Override
public List<Collector> create() throws IOException {
  Collector subCollector;
  if (sort == null || sort.equals(Sort.RELEVANCE)) {
    subCollector = topDocsCollector = TopScoreDocCollector.create(docsToCollect, Integer.MAX_VALUE);
  } else {
    topDocsCollector = TopFieldCollector.create(sort, docsToCollect, Integer.MAX_VALUE);
    if (needScores) {
      maxScoreCollector = new MaxScoreCollector();
      subCollector = MultiCollector.wrap(topDocsCollector, maxScoreCollector);
    } else {
      subCollector = topDocsCollector;
    }
  }
  filterCollector = new FilterCollector(docSet, subCollector);
  return Arrays.asList((Collector) filterCollector);
}
 
Example 4
Source Project: lucene-solr   Source File: CommandHandler.java    License: Apache License 2.0 5 votes vote down vote up
private DocSet computeDocSet(Query query, ProcessedFilter filter, List<Collector> collectors) throws IOException {
  int maxDoc = searcher.maxDoc();
  final DocSetCollector docSetCollector = new DocSetCollector(maxDoc);
  List<Collector> allCollectors = new ArrayList<>(collectors);
  allCollectors.add(docSetCollector);
  searchWithTimeLimiter(query, filter, MultiCollector.wrap(allCollectors));
  return DocSetUtil.getDocSet( docSetCollector, searcher );
}
 
Example 5
Source Project: lucene-solr   Source File: CommandHandler.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Invokes search with the specified filter and collector.  
 * If a time limit has been specified then wrap the collector in the TimeLimitingCollector
 */
private void searchWithTimeLimiter(Query query, 
                                   ProcessedFilter filter, 
                                   Collector collector) throws IOException {
  if (queryCommand.getTimeAllowed() > 0 ) {
    collector = new TimeLimitingCollector(collector, TimeLimitingCollector.getGlobalCounter(), queryCommand.getTimeAllowed());
  }

  TotalHitCountCollector hitCountCollector = new TotalHitCountCollector();
  if (includeHitCount) {
    collector = MultiCollector.wrap(collector, hitCountCollector);
  }

  query = QueryUtils.combineQueryAndFilter(query, filter.filter);

  if (filter.postFilter != null) {
    filter.postFilter.setLastDelegate(collector);
    collector = filter.postFilter;
  }

  try {
    searcher.search(query, collector);
  } catch (TimeLimitingCollector.TimeExceededException | ExitableDirectoryReader.ExitingReaderException x) {
    partialResults = true;
    log.warn("Query: {}; {}", query, x.getMessage());
  }

  if (includeHitCount) {
    totalHitCount = hitCountCollector.getTotalHits();
  }
}
 
Example 6
Source Project: lumongo   Source File: FacetStorageTest.java    License: Apache License 2.0 5 votes vote down vote up
/** User runs a query and counts facets. */
private List<FacetResult> search() throws IOException {
	DirectoryReader indexReader = DirectoryReader.open(directory);
	IndexSearcher searcher = new IndexSearcher(indexReader);
	SortedSetDocValuesReaderState state = new DefaultSortedSetDocValuesReaderState(indexReader);
	
	// Aggregates the facet counts
	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);

	TotalHitCountCollector collector = new TotalHitCountCollector();
	searcher.search(new MatchAllDocsQuery(), MultiCollector.wrap(collector, fc));
	
	// Retrieve results
	Facets facets = new SortedSetDocValuesFacetCounts(state, fc);
	
	List<FacetResult> results = new ArrayList<>();
	results.add(facets.getTopChildren(10, "Author"));
	results.add(facets.getTopChildren(10, "Publish Year"));
	indexReader.close();
	
	return results;
}
 
Example 7
Source Project: linden   Source File: LindenDocsCollector.java    License: Apache License 2.0 4 votes vote down vote up
public void wrap(Collector collector) {
  wrappedCollector = MultiCollector.wrap(collector, wrappedCollector);
}
 
Example 8
Source Project: lucene-solr   Source File: GroupingSearch.java    License: Apache License 2.0 4 votes vote down vote up
@SuppressWarnings({"unchecked", "rawtypes"})
protected TopGroups groupByFieldOrFunction(IndexSearcher searcher, Query query, int groupOffset, int groupLimit) throws IOException {
  int topN = groupOffset + groupLimit;

  final FirstPassGroupingCollector firstPassCollector = new FirstPassGroupingCollector(grouper, groupSort, topN);
  final AllGroupsCollector allGroupsCollector = allGroups ? new AllGroupsCollector(grouper) : null;
  final AllGroupHeadsCollector allGroupHeadsCollector
      = allGroupHeads ? AllGroupHeadsCollector.newCollector(grouper, sortWithinGroup) : null;

  final Collector firstRound = MultiCollector.wrap(firstPassCollector, allGroupsCollector, allGroupHeadsCollector);

  CachingCollector cachedCollector = null;
  if (maxCacheRAMMB != null || maxDocsToCache != null) {
    if (maxCacheRAMMB != null) {
      cachedCollector = CachingCollector.create(firstRound, cacheScores, maxCacheRAMMB);
    } else {
      cachedCollector = CachingCollector.create(firstRound, cacheScores, maxDocsToCache);
    }
    searcher.search(query, cachedCollector);
  } else {
    searcher.search(query, firstRound);
  }

  matchingGroups = allGroups ? allGroupsCollector.getGroups() : Collections.emptyList();
  matchingGroupHeads = allGroupHeads ? allGroupHeadsCollector.retrieveGroupHeads(searcher.getIndexReader().maxDoc())
      : new Bits.MatchNoBits(searcher.getIndexReader().maxDoc());

  Collection<SearchGroup> topSearchGroups = firstPassCollector.getTopGroups(groupOffset);
  if (topSearchGroups == null) {
    return new TopGroups(new SortField[0], new SortField[0], 0, 0, new GroupDocs[0], Float.NaN);
  }

  int topNInsideGroup = groupDocsOffset + groupDocsLimit;
  TopGroupsCollector secondPassCollector
      = new TopGroupsCollector(grouper, topSearchGroups, groupSort, sortWithinGroup, topNInsideGroup, includeMaxScore);

  if (cachedCollector != null && cachedCollector.isCached()) {
    cachedCollector.replay(secondPassCollector);
  } else {
    searcher.search(query, secondPassCollector);
  }

  if (allGroups) {
    return new TopGroups(secondPassCollector.getTopGroups(groupDocsOffset), matchingGroups.size());
  } else {
    return secondPassCollector.getTopGroups(groupDocsOffset);
  }
}
 
Example 9
Source Project: lucene-solr   Source File: TopGroupsCollector.java    License: Apache License 2.0 4 votes vote down vote up
public TopDocsAndMaxScoreCollector(boolean sortedByScore, TopDocsCollector<?> topDocsCollector, MaxScoreCollector maxScoreCollector) {
  super(MultiCollector.wrap(topDocsCollector, maxScoreCollector));
  this.sortedByScore = sortedByScore;
  this.topDocsCollector = topDocsCollector;
  this.maxScoreCollector = maxScoreCollector;
}