Java Code Examples for org.apache.lucene.search.MultiCollector#wrap()

The following examples show how to use org.apache.lucene.search.MultiCollector#wrap() . 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   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   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 3
Source Project: lucene-solr   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 4
Source Project: linden   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 5
Source Project: lucene-solr   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 6
Source Project: lucene-solr   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;
}