Examples of org.apache.lucene.search.QueryWrapperFilter

org.apache.lucene.search.QueryWrapperFilter
Constrains search results to only match those which also match a provided query.
This could be used, for example, with a {@link TermRangeQuery} on a suitablyformatted date field to implement date filtering. One could re-use a single QueryFilter that matches, e.g., only documents modified within the last week. The QueryFilter and TermRangeQuery would only need to be reconstructed once per day.

    final AtomicReaderContext readerContext = reader.getContext();
    boolean any = false;
    for (QueryAndLimit ent : queriesIter) {
      Query query = ent.query;
      int limit = ent.limit;
      final DocIdSet docs = new QueryWrapperFilter(query).getDocIdSet(readerContext, reader.getLiveDocs());
      if (docs != null) {
        final DocIdSetIterator it = docs.iterator();
        if (it != null) {
          while(true)  {
            int doc = it.nextDoc();

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      try {
        
        Query query = queryParser.getQuery(getIndexedFields(), filterQueryString, collection.getSearchModeAnalyzer(), searchRequest.getRegexQuery());
      
        Filter filter = new QueryWrapperFilter(query);
        
        return filter;
        
      } catch (Exception e) {
        logger.error("Error In getFilter ", e);

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    }
    
    //cache miss
    if (qb != null)
    {
      cachedFilter = new QueryWrapperFilter(q);
    } else
    {
      cachedFilter = new CachingWrapperFilter(f);
    }

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  }


  public void testLatLongFilterOnDeletedDocs() throws Exception {
    writer.deleteDocuments(new Term("name", "Potomac"));
    IndexReader r = writer.getReader();
    LatLongDistanceFilter f = new LatLongDistanceFilter(new QueryWrapperFilter(new MatchAllDocsQuery()),
                                                        lat, lng, 1.0, latField, lngField);


    IndexReader[] readers = r.getSequentialSubReaders();
    for(int i=0;i<readers.length;i++) {
      f.getDocIdSet(readers[i]);

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  public Filter getFilter(Query query) {
    // Chain the Query (as filter) with our distance filter
    if (distanceFilter != null) {
      distanceFilter.reset();
    }
    QueryWrapperFilter qf = new QueryWrapperFilter(query);
    return new ChainedFilter(new Filter[] {qf, filter},
                             ChainedFilter.AND);
  }

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  }
  
  public void testQueries() throws Exception {
    int n = atLeast(4);
    for (int i = 0; i < n; i++) {
      Filter odd = new QueryWrapperFilter(new TermQuery(new Term("oddeven", "odd")));
      assertQuery(new MatchAllDocsQuery(), null);
      assertQuery(new TermQuery(new Term("english", "one")), null);
      assertQuery(new MatchAllDocsQuery(), odd);
      assertQuery(new TermQuery(new Term("english", "four")), odd);
      BooleanQuery bq = new BooleanQuery();

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    document.add(new StringField("fieldXXX", "x", Field.Store.NO));
    w.addDocument(document);


    IndexSearcher searcher = new IndexSearcher(DirectoryReader.open(w.w, false));
    w.close();
    Filter parentFilter = new QueryWrapperFilter(new TermQuery(new Term("__type", "parent")));
    Filter childFilter = new QueryWrapperFilter(new PrefixQuery(new Term("field2")));
    ToParentBlockJoinQuery query = new ToParentBlockJoinQuery(
        new FilteredQuery(new MatchAllDocsQuery(), childFilter),
        new FixedBitSetCachingWrapperFilter(parentFilter),
        ScoreMode.None
    );


    // Sort by field ascending, order first
    ToParentBlockJoinSortField sortField = new ToParentBlockJoinSortField(
        "field2", SortField.Type.STRING, false, wrap(parentFilter), wrap(childFilter)
    );
    Sort sort = new Sort(sortField);
    TopFieldDocs topDocs = searcher.search(query, 5, sort);
    assertEquals(7, topDocs.totalHits);
    assertEquals(5, topDocs.scoreDocs.length);
    assertEquals(3, topDocs.scoreDocs[0].doc);
    assertEquals("a", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[0]).fields[0]).utf8ToString());
    assertEquals(7, topDocs.scoreDocs[1].doc);
    assertEquals("c", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[1]).fields[0]).utf8ToString());
    assertEquals(11, topDocs.scoreDocs[2].doc);
    assertEquals("e", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[2]).fields[0]).utf8ToString());
    assertEquals(15, topDocs.scoreDocs[3].doc);
    assertEquals("g", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[3]).fields[0]).utf8ToString());
    assertEquals(19, topDocs.scoreDocs[4].doc);
    assertEquals("i", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[4]).fields[0]).utf8ToString());


    // Sort by field ascending, order last
    sortField = new ToParentBlockJoinSortField(
        "field2", SortField.Type.STRING, false, true, wrap(parentFilter), wrap(childFilter)
    );
    sort = new Sort(sortField);
    topDocs = searcher.search(query, 5, sort);
    assertEquals(7, topDocs.totalHits);
    assertEquals(5, topDocs.scoreDocs.length);
    assertEquals(3, topDocs.scoreDocs[0].doc);
    assertEquals("c", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[0]).fields[0]).utf8ToString());
    assertEquals(7, topDocs.scoreDocs[1].doc);
    assertEquals("e", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[1]).fields[0]).utf8ToString());
    assertEquals(11, topDocs.scoreDocs[2].doc);
    assertEquals("g", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[2]).fields[0]).utf8ToString());
    assertEquals(15, topDocs.scoreDocs[3].doc);
    assertEquals("i", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[3]).fields[0]).utf8ToString());
    assertEquals(19, topDocs.scoreDocs[4].doc);
    assertEquals("k", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[4]).fields[0]).utf8ToString());


    // Sort by field descending, order last
    sortField = new ToParentBlockJoinSortField(
        "field2", SortField.Type.STRING, true, wrap(parentFilter), wrap(childFilter)
    );
    sort = new Sort(sortField);
    topDocs = searcher.search(query, 5, sort);
    assertEquals(topDocs.totalHits, 7);
    assertEquals(5, topDocs.scoreDocs.length);
    assertEquals(28, topDocs.scoreDocs[0].doc);
    assertEquals("o", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[0]).fields[0]).utf8ToString());
    assertEquals(23, topDocs.scoreDocs[1].doc);
    assertEquals("m", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[1]).fields[0]).utf8ToString());
    assertEquals(19, topDocs.scoreDocs[2].doc);
    assertEquals("k", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[2]).fields[0]).utf8ToString());
    assertEquals(15, topDocs.scoreDocs[3].doc);
    assertEquals("i", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[3]).fields[0]).utf8ToString());
    assertEquals(11, topDocs.scoreDocs[4].doc);
    assertEquals("g", ((BytesRef) ((FieldDoc) topDocs.scoreDocs[4]).fields[0]).utf8ToString());


    // Sort by field descending, order last, sort filter (filter_1:T)
    childFilter = new QueryWrapperFilter(new TermQuery((new Term("filter_1", "T"))));
    query = new ToParentBlockJoinQuery(
        new FilteredQuery(new MatchAllDocsQuery(), childFilter),
        new FixedBitSetCachingWrapperFilter(parentFilter),
        ScoreMode.None
    );

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    group = groups.groups[3];
    compareGroupValue(null, group);
    assertEquals(1, group.scoreDocs.length);
    assertEquals(6, group.scoreDocs[0].doc);


    Filter lastDocInBlock = new CachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("groupend", "x"))));
    groupingSearch = new GroupingSearch(lastDocInBlock);
    groups = groupingSearch.search(indexSearcher, null, new TermQuery(new Term("content", "random")), 0, 10);


    assertEquals(7, groups.totalHitCount);
    assertEquals(7, groups.totalGroupedHitCount);

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      indexWriter.commit();
    }
    indexReader = DirectoryReader.open(indexWriter, random().nextBoolean());
    indexWriter.close();
    indexSearcher = new IndexSearcher(indexReader);
    parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new WildcardQuery(new Term("parent", "*"))));
  }

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    //Date pastTheEnd = parseDate("2099 Jan 1");
    // dateFilter = DateFilter.Before("date", pastTheEnd);
    // just treat dates as strings and select the whole range for now...
    dateFilter = TermRangeFilter.newStringRange("date","","ZZZZ",true,true);


    bobFilter = new QueryWrapperFilter(
        new TermQuery(new Term("owner", "bob")));
    sueFilter = new QueryWrapperFilter(
        new TermQuery(new Term("owner", "sue")));
  }

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