Java Code Examples for org.apache.lucene.search.spans.Spans#nextStartPosition()

private void checkSpans(Spans spans, int expectedNumSpans, int expectedNumPayloads,
                        int expectedPayloadLength, int expectedFirstByte) throws IOException {
  assertTrue("spans is null and it shouldn't be", spans != null);
  //each position match should have a span associated with it, since there is just one underlying term query, there should
  //only be one entry in the span
  VerifyingCollector collector = new VerifyingCollector();
  int seen = 0;
  while (spans.nextDoc() != Spans.NO_MORE_DOCS) {
    while (spans.nextStartPosition() != Spans.NO_MORE_POSITIONS) {
      collector.reset();
      spans.collect(collector);
      collector.verify(expectedPayloadLength, expectedFirstByte);
      assertEquals("expectedNumPayloads", expectedNumPayloads, collector.payloads.size());
      seen++;
    }
  }
  assertEquals("expectedNumSpans", expectedNumSpans, seen);
}
 

private void checkSpans(Spans spans, int numSpans, int[] numPayloads) throws IOException {
  int cnt = 0;
  VerifyingCollector collector = new VerifyingCollector();
  while (spans.nextDoc() != Spans.NO_MORE_DOCS) {
    while (spans.nextStartPosition() != Spans.NO_MORE_POSITIONS) {
      if(VERBOSE)
        System.out.println("\nSpans Dump --");
      collector.reset();
      spans.collect(collector);
      assertEquals("payload size", numPayloads[cnt], collector.payloads.size());

      cnt++;
    }
  }

  assertEquals("expected numSpans", numSpans, cnt);
}
 

public void testShrinkToAfterShortestMatch() throws IOException {
  Directory directory = newDirectory();
  RandomIndexWriter writer = new RandomIndexWriter(random(), directory,
                                                   newIndexWriterConfig(new TestPayloadAnalyzer()));

  Document doc = new Document();
  doc.add(new TextField("content", new StringReader("a b c d e f g h i j a k")));
  writer.addDocument(doc);

  IndexReader reader = writer.getReader();
  IndexSearcher is = newSearcher(getOnlyLeafReader(reader), false);
  writer.close();

  SpanTermQuery stq1 = new SpanTermQuery(new Term("content", "a"));
  SpanTermQuery stq2 = new SpanTermQuery(new Term("content", "k"));
  SpanQuery[] sqs = { stq1, stq2 };
  SpanNearQuery snq = new SpanNearQuery(sqs, 1, true);
  VerifyingCollector collector = new VerifyingCollector();
  Spans spans = snq.createWeight(is, ScoreMode.COMPLETE_NO_SCORES, 1f).getSpans(is.getIndexReader().leaves().get(0), SpanWeight.Postings.PAYLOADS);

  TopDocs topDocs = is.search(snq, 1);
  Set<String> payloadSet = new HashSet<>();
  for (int i = 0; i < topDocs.scoreDocs.length; i++) {
    while (spans.nextDoc() != Spans.NO_MORE_DOCS) {
      while (spans.nextStartPosition() != Spans.NO_MORE_POSITIONS) {
        collector.reset();
        spans.collect(collector);
        for (final BytesRef payload : collector.payloads) {
          payloadSet.add(Term.toString(payload));
        }
      }
    }
  }
  assertEquals(2, payloadSet.size());
  assertTrue(payloadSet.contains("a:Noise:10"));
  assertTrue(payloadSet.contains("k:Noise:11"));
  reader.close();
  directory.close();
}
 

public void testShrinkToAfterShortestMatch2() throws IOException {
  Directory directory = newDirectory();
  RandomIndexWriter writer = new RandomIndexWriter(random(), directory,
                                                   newIndexWriterConfig(new TestPayloadAnalyzer()));

  Document doc = new Document();
  doc.add(new TextField("content", new StringReader("a b a d k f a h i k a k")));
  writer.addDocument(doc);
  IndexReader reader = writer.getReader();
  IndexSearcher is = newSearcher(getOnlyLeafReader(reader), false);
  writer.close();

  SpanTermQuery stq1 = new SpanTermQuery(new Term("content", "a"));
  SpanTermQuery stq2 = new SpanTermQuery(new Term("content", "k"));
  SpanQuery[] sqs = { stq1, stq2 };
  SpanNearQuery snq = new SpanNearQuery(sqs, 0, true);
  VerifyingCollector collector = new VerifyingCollector();
  Spans spans = snq.createWeight(is, ScoreMode.COMPLETE_NO_SCORES, 1f).getSpans(is.getIndexReader().leaves().get(0), SpanWeight.Postings.PAYLOADS);

  TopDocs topDocs = is.search(snq, 1);
  Set<String> payloadSet = new HashSet<>();
  for (int i = 0; i < topDocs.scoreDocs.length; i++) {
    while (spans.nextDoc() != Spans.NO_MORE_DOCS) {
      while (spans.nextStartPosition() != Spans.NO_MORE_POSITIONS) {
        collector.reset();
        spans.collect(collector);
        for (final BytesRef payload: collector.payloads) {
          payloadSet.add(Term.toString(payload));
        }
      }
    }
  }
  assertEquals(2, payloadSet.size());
  assertTrue(payloadSet.contains("a:Noise:10"));
  assertTrue(payloadSet.contains("k:Noise:11"));
  reader.close();
  directory.close();
}
 

public void testMultipleMatchesPerDoc() throws Exception {
  SpanQuery query = new PayloadScoreQuery(new SpanTermQuery(new Term(PayloadHelper.MULTI_FIELD, "seventy")),
          new MaxPayloadFunction(), PayloadDecoder.FLOAT_DECODER);
  TopDocs hits = searcher.search(query, 100);
  assertTrue("hits is null and it shouldn't be", hits != null);
  assertTrue("hits Size: " + hits.totalHits.value + " is not: " + 100, hits.totalHits.value == 100);

  //they should all have the exact same score, because they all contain seventy once, and we set
  //all the other similarity factors to be 1

  //System.out.println("Hash: " + seventyHash + " Twice Hash: " + 2*seventyHash);
  //there should be exactly 10 items that score a 4, all the rest should score a 2
  //The 10 items are: 70 + i*100 where i in [0-9]
  int numTens = 0;
  for (int i = 0; i < hits.scoreDocs.length; i++) {
    ScoreDoc doc = hits.scoreDocs[i];
    if (doc.doc % 10 == 0) {
      numTens++;
      assertTrue(doc.score + " does not equal: " + 4.0, doc.score == 4.0);
    } else {
      assertTrue(doc.score + " does not equal: " + 2, doc.score == 2);
    }
  }
  assertTrue(numTens + " does not equal: " + 10, numTens == 10);
  CheckHits.checkExplanations(query, "field", searcher, true);
  Spans spans = query.createWeight(searcher, ScoreMode.COMPLETE_NO_SCORES, 1f).getSpans(searcher.getIndexReader().leaves().get(0), SpanWeight.Postings.POSITIONS);
  assertTrue("spans is null and it shouldn't be", spans != null);
  //should be two matches per document
  int count = 0;
  //100 hits times 2 matches per hit, we should have 200 in count
  while (spans.nextDoc() != Spans.NO_MORE_DOCS) {
    while (spans.nextStartPosition() != Spans.NO_MORE_POSITIONS) {
      count++;
    }
  }
  assertTrue(count + " does not equal: " + 200, count == 200);
}
 

private long doCountResults(IndexSearcher searcher,
    SearchQueryRequest aRequest, MtasSpanQuery q) throws IOException
{
    ListIterator<LeafReaderContext> leafReaderContextIterator = searcher.getIndexReader()
            .leaves().listIterator();

    Map<Long, Long> annotatableDocuments = listAnnotatableDocuments(aRequest.getProject(),
        aRequest.getUser());

    final float boost = 0;
    SpanWeight spanweight = q.rewrite(searcher.getIndexReader()).createWeight(searcher, false,
            boost);

    long numResults = 0;

    while (leafReaderContextIterator.hasNext()) {
        LeafReaderContext leafReaderContext = leafReaderContextIterator.next();
        try {
            Spans spans = spanweight.getSpans(leafReaderContext, SpanWeight.Postings.POSITIONS);
            SegmentReader segmentReader = (SegmentReader) leafReaderContext.reader();
            if (spans != null) {
                while (spans.nextDoc() != Spans.NO_MORE_DOCS) {
                    if (segmentReader.numDocs() == segmentReader.maxDoc()
                            || segmentReader.getLiveDocs().get(spans.docID())) {
                        Document document = segmentReader.document(spans.docID());

                        // Retrieve user
                        String user = document.get(FIELD_USER);

                        // Retrieve source and annotation document ids
                        String rawSourceDocumentId = document.get(FIELD_SOURCE_DOCUMENT_ID);
                        String rawAnnotationDocumentId = document
                                .get(FIELD_ANNOTATION_DOCUMENT_ID);
                        if (rawSourceDocumentId == null || rawAnnotationDocumentId == null) {
                            log.trace("Indexed document lacks source/annotation document IDs"
                                    + " - source: {}, annotation: {}", rawSourceDocumentId,
                                rawAnnotationDocumentId);
                            continue;

                        }
                        long sourceDocumentId = Long.valueOf(rawSourceDocumentId);
                        long annotationDocumentId = Long.valueOf(rawAnnotationDocumentId);

                        // If the query is limited to a given document, skip any results
                        // which are not in the given document
                        Optional<SourceDocument> limitedToDocument = aRequest
                                .getLimitedToDocument();
                        if (limitedToDocument.isPresent() && !Objects
                            .equals(limitedToDocument.get().getId(), sourceDocumentId)) {
                            log.trace("Query limited to document {}, skipping results for "
                                    + "document {}", limitedToDocument.get().getId(),
                                sourceDocumentId);
                            continue;
                        }

                        if (annotatableDocuments.containsKey(sourceDocumentId)
                            && annotationDocumentId == -1) {
                            // Exclude result if the retrieved document is a sourcedocument
                            // (that is, has annotationDocument = -1) AND it has a
                            // corresponding annotation document for this user
                            log.trace("Skipping results from indexed source document {} in" 
                                + "favor of results from the corresponding annotation "
                                + "document", sourceDocumentId);
                            continue;
                        }
                        else if (annotationDocumentId != -1 && !aRequest.getUser().getUsername()
                            .equals(user)) {
                            // Exclude result if the retrieved document is an annotation
                            // document (that is, annotationDocument != -1 and its username
                            // is different from the quering user
                            log.trace("Skipping results from annotation document for user {} "
                                    + "which does not match the requested user {}", user,
                                aRequest.getUser().getUsername());
                            continue;
                        }

                        while (spans.nextStartPosition() != Spans.NO_MORE_POSITIONS) {
                            numResults++;
                        }
                    }
                }
            }
        }
        catch (Exception e) {
            log.error("Unable to process query results", e);
            numResults = -1;
        }
    }
    return numResults;
}
 

private static void doQuery(IndexReader indexReader, String field, MtasSpanQuery q,
        List<String> prefixes)
    throws IOException
{
    ListIterator<LeafReaderContext> iterator = indexReader.leaves().listIterator();
    IndexSearcher searcher = new IndexSearcher(indexReader);
    final float boost = 0;
    SpanWeight spanweight = q.rewrite(indexReader).createWeight(searcher, false, boost);

    while (iterator.hasNext()) {
        System.out.println("#### new iteration ####");
        LeafReaderContext lrc = iterator.next();
        Spans spans = spanweight.getSpans(lrc, SpanWeight.Postings.POSITIONS);
        SegmentReader segmentReader = (SegmentReader) lrc.reader();
        Terms terms = segmentReader.terms(field);
        CodecInfo mtasCodecInfo = CodecInfo.getCodecInfoFromTerms(terms);
        if (spans != null) {
            while (spans.nextDoc() != Spans.NO_MORE_DOCS) {
                if (segmentReader.numDocs() == segmentReader.maxDoc()
                        || segmentReader.getLiveDocs().get(spans.docID())) {
                    String idValue = segmentReader.document(spans.docID()).getField(FIELD_ID)
                            .stringValue();
                    System.out.println("********  New doc " + spans.docID() + "-" + idValue);
                    while (spans.nextStartPosition() != Spans.NO_MORE_POSITIONS) {
                        System.out.println("------");
                        List<MtasTokenString> tokens = mtasCodecInfo
                                .getPrefixFilteredObjectsByPositions(field, spans.docID(),
                                        prefixes, spans.startPosition(),
                                        (spans.endPosition() - 1));
                        for (MtasTokenString token : tokens) {
                            System.out.print("docId: " + (lrc.docBase + spans.docID()) + ", ");
                            System.out.print(" position: " + token.getPositionStart()
                                    + (!Objects.equals(token.getPositionEnd(),
                                            token.getPositionStart())
                                                    ? "-" + token.getPositionEnd()
                                                    : ""));
                            System.out.print(" offset: " + token.getOffsetStart() + "-"
                                    + token.getOffsetEnd());
                            System.out.print(" mtasId: " + token.getId());
                            System.out.println(" " + token.getPrefix()
                                    + (token.getPostfix() != null ? ":" + token.getPostfix()
                                            : "")
                                    + ", ");
                        }
                        System.out.println("------");
                        List<MtasTreeHit<String>> hits = mtasCodecInfo
                                .getPositionedTermsByPrefixesAndPositionRange(field,
                                        spans.docID(), prefixes, spans.startPosition(),
                                        (spans.endPosition() - 1));
                        for (MtasTreeHit<String> hit : hits) {
                            System.out.print("docId: " + (lrc.docBase + spans.docID()) + ", ");
                            System.out.print("position: " + hit.startPosition
                                    + (hit.endPosition != hit.startPosition
                                            ? "-" + hit.endPosition
                                            : ""));
                            System.out.println(" " + CodecUtil.termPrefix(hit.data)
                                    + (CodecUtil.termValue(hit.data) != null
                                            ? ":" + CodecUtil.termValue(hit.data)
                                            : "")
                                    + ", ");
                        }
                    }
                    // if (prefixes != null && !prefixes.isEmpty()) {
                    // }
                }
            }
        }
    }
}
 

public void testPayloadsPos0() throws Exception {
  Directory dir = newDirectory();
  RandomIndexWriter writer = new RandomIndexWriter(random(), dir, new MockPayloadAnalyzer());
  Document doc = new Document();
  doc.add(new TextField("content", new StringReader(
      "a a b c d e a f g h i j a b k k")));
  writer.addDocument(doc);

  final IndexReader readerFromWriter = writer.getReader();
  LeafReader r = getOnlyLeafReader(readerFromWriter);

  PostingsEnum tp = r.postings(new Term("content", "a"), PostingsEnum.ALL);
  
  int count = 0;
  assertTrue(tp.nextDoc() != DocIdSetIterator.NO_MORE_DOCS);
  // "a" occurs 4 times
  assertEquals(4, tp.freq());
  assertEquals(0, tp.nextPosition());
  assertEquals(1, tp.nextPosition());
  assertEquals(3, tp.nextPosition());
  assertEquals(6, tp.nextPosition());

  // only one doc has "a"
  assertEquals(DocIdSetIterator.NO_MORE_DOCS, tp.nextDoc());

  IndexSearcher is = newSearcher(getOnlyLeafReader(readerFromWriter));

  SpanTermQuery stq1 = new SpanTermQuery(new Term("content", "a"));
  SpanTermQuery stq2 = new SpanTermQuery(new Term("content", "k"));
  SpanQuery[] sqs = { stq1, stq2 };
  SpanNearQuery snq = new SpanNearQuery(sqs, 30, false);

  count = 0;
  boolean sawZero = false;
  if (VERBOSE) {
    System.out.println("\ngetPayloadSpans test");
  }
  PayloadSpanCollector collector = new PayloadSpanCollector();
  Spans pspans = snq.createWeight(is, ScoreMode.COMPLETE_NO_SCORES, 1f).getSpans(is.getIndexReader().leaves().get(0), SpanWeight.Postings.PAYLOADS);
  while (pspans.nextDoc() != Spans.NO_MORE_DOCS) {
    while (pspans.nextStartPosition() != Spans.NO_MORE_POSITIONS) {
      if (VERBOSE) {
        System.out.println("doc " + pspans.docID() + ": span " + pspans.startPosition()
            + " to " + pspans.endPosition());
      }
      collector.reset();
      pspans.collect(collector);
      sawZero |= pspans.startPosition() == 0;
      for (BytesRef payload : collector.payloads) {
        count++;
        if (VERBOSE) {
          System.out.println("  payload: " + Term.toString(payload));
        }
      }
    }
  }
  assertTrue(sawZero);
  assertEquals(8, count);

  // System.out.println("\ngetSpans test");
  Spans spans = snq.createWeight(is, ScoreMode.COMPLETE_NO_SCORES, 1f).getSpans(is.getIndexReader().leaves().get(0), SpanWeight.Postings.POSITIONS);
  count = 0;
  sawZero = false;
  while (spans.nextDoc() != Spans.NO_MORE_DOCS) {
    while (spans.nextStartPosition() != Spans.NO_MORE_POSITIONS) {
      count++;
      sawZero |= spans.startPosition() == 0;
      // System.out.println(spans.doc() + " - " + spans.start() + " - " +
      // spans.end());
    }
  }
  assertEquals(4, count);
  assertTrue(sawZero);

  writer.close();
  is.getIndexReader().close();
  dir.close();
}