Examples of org.apache.lucene.search.TopDocs

org.apache.lucene.search.TopDocs
Represents hits returned by {@link Searcher#search(Query,Filter,int)} and {@link Searcher#search(Query,int)}.

    
    IndexSearcher is = newSearcher(ir);
    
    SortField sortField = new SortField("collated", SortField.Type.STRING);
    
    TopDocs td = is.search(new MatchAllDocsQuery(), 5, new Sort(sortField));
    assertEquals("abc", ir.document(td.scoreDocs[0].doc).get("field"));
    assertEquals("ABC", ir.document(td.scoreDocs[1].doc).get("field"));
    ir.close();
    dir.close();
  }

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  private void doTestRanges(IndexSearcher is, String startPoint, String endPoint, Query query, Collator collator) throws Exception { 
    QueryUtils.check(query);
    
    // positive test
    TopDocs docs = is.search(query, is.getIndexReader().maxDoc());
    for (ScoreDoc doc : docs.scoreDocs) {
      String value = is.doc(doc.doc).get("field");
      assertTrue(collator.compare(value, startPoint) >= 0);
      assertTrue(collator.compare(value, endPoint) <= 0);
    }

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    IndexSearcher searcher = newSearcher(reader);
    
    int numQueries = atLeast(10);
    for (int i = 0; i < numQueries; i++) {
      Term term = terms.get(random().nextInt(num));
      TopDocs queryResult = searcher.search(new TermQuery(term), reader.maxDoc());
      
      MatchAllDocsQuery matchAll = new MatchAllDocsQuery();
      final TermFilter filter = termFilter(term);
      TopDocs filterResult = searcher.search(matchAll, filter, reader.maxDoc());
      assertEquals(filterResult.totalHits, queryResult.totalHits);
      ScoreDoc[] scoreDocs = filterResult.scoreDocs;
      for (int j = 0; j < scoreDocs.length; j++) {
        assertEquals(scoreDocs[j].doc, queryResult.scoreDocs[j].doc);
      }

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    final Query q = new CustomExternalQuery(q1);
    log(q);


    IndexReader r = DirectoryReader.open(dir);
    IndexSearcher s = newSearcher(r);
    TopDocs hits = s.search(q, 1000);
    assertEquals(N_DOCS, hits.totalHits);
    for(int i=0;i<N_DOCS;i++) {
      final int doc = hits.scoreDocs[i].doc;
      final float score = hits.scoreDocs[i].score;
      assertEquals("doc=" + doc, (float) 1+(4*doc) % N_DOCS, score, 0.0001);

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    q5CustomMulAdd.setStrict(true);
    q5CustomMulAdd.setBoost(boost);
    log(q5CustomMulAdd);


    // do al the searches 
    TopDocs td1 = s.search(q1, null, 1000);
    TopDocs td2CustomNeutral = s.search(q2CustomNeutral, null, 1000);
    TopDocs td3CustomMul = s.search(q3CustomMul, null, 1000);
    TopDocs td4CustomAdd = s.search(q4CustomAdd, null, 1000);
    TopDocs td5CustomMulAdd = s.search(q5CustomMulAdd, null, 1000);


    // put results in map so we can verify the scores although they have changed
    Map<Integer,Float> h1               = topDocsToMap(td1);
    Map<Integer,Float> h2CustomNeutral  = topDocsToMap(td2CustomNeutral);
    Map<Integer,Float> h3CustomMul      = topDocsToMap(td3CustomMul);

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    TopScoreDocCollector docCollector = TopScoreDocCollector.create(100, true);
    QueryParser queryParser = new QueryParser(Version.LUCENE_43, "text", new StandardAnalyzer(
        Version.LUCENE_43));
    Query query = queryParser.parse("Foo*");
    searcher.search(query, docCollector);
    TopDocs docs = docCollector.topDocs();
    ScoreDoc[] scoreDocs = docs.scoreDocs;


    assertEquals("should be doc 0", 0, scoreDocs[0].doc);
    assertEquals("should be doc 1", 1, scoreDocs[1].doc);
    assertEquals("should be doc 2", 2, scoreDocs[2].doc);

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                   } 
                   public float sloppyFreq(int distance) {
                       return 1;
                   }
        });
        TopDocs results = searcher.search(query,10);


        ScoreDoc[] hits = results.scoreDocs;
        float total_score = 0;
        //add up the scores
        for (ScoreDoc hit : hits) {

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        ScoreDoc lastDoc = null;
        do {
            // collect all the hits up to maxResults, and sort them based
            // on Lucene match score and population for the associated
            // GeoNames record
            TopDocs results = indexSearcher.searchAfter(lastDoc, query, filter, maxResults, POPULATION_SORT);
            // set lastDoc to null so we don't infinite loop if results is empty
            lastDoc = null;
            // populate results if matches were discovered
            for (ScoreDoc scoreDoc : results.scoreDocs) {
                lastDoc = scoreDoc;

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        Map<Integer, GeoName> parentMap = new HashMap<Integer, GeoName>();
        Map<Integer, Set<GeoName>> grandParentMap = new HashMap<Integer, Set<GeoName>>();
        for (Integer parentId : childMap.keySet()) {
            // Lucene query used to look for exact match on the "geonameID" field
            Query q = NumericRangeQuery.newIntRange(GEONAME_ID.key(), parentId, parentId, true, true);
            TopDocs results = indexSearcher.search(q, null, 1, POPULATION_SORT);
            if (results.scoreDocs.length > 0) {
                Document doc = indexSearcher.doc(results.scoreDocs[0].doc);
                GeoName parent = GeoName.parseFromGeoNamesRecord(doc.get(GEONAME.key()), doc.get(PREFERRED_NAME.key()));
                parentMap.put(parent.getGeonameID(), parent);
                if (!parent.isAncestryResolved()) {

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        try {
            GeoName geoName = null;
            // Lucene query used to look for exact match on the "geonameID" field
            Query q = NumericRangeQuery.newIntRange(GEONAME_ID.key(), geonameId, geonameId, true, true);
            // retrieve only one matching document
            TopDocs results = indexSearcher.search(q, 1);
            if (results.scoreDocs.length > 0) {
                Document doc = indexSearcher.doc(results.scoreDocs[0].doc);
                geoName = GeoName.parseFromGeoNamesRecord(doc.get(GEONAME.key()), doc.get(PREFERRED_NAME.key()));
                if (!geoName.isAncestryResolved()) {
                    Integer parentId = PARENT_ID.getValue(doc);

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