Examples of org.apache.lucene.index.Fields

org.apache.lucene.index.Fields
Flex API for access to fields and terms @lucene.experimental

  }


  @Override
  public Fields get(int docID) throws IOException {
    if (tvx != null) {
      Fields fields = new TVFields(docID);
      if (fields.size() == 0) {
        // TODO: we can improve writer here, eg write 0 into
        // tvx file, so we know on first read from tvx that
        // this doc has no TVs
        return null;
      } else {

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          || matchingVectorsReader.getCompressionMode() != compressionMode
          || matchingVectorsReader.getChunkSize() != chunkSize
          || matchingVectorsReader.getPackedIntsVersion() != PackedInts.VERSION_CURRENT) {
        // naive merge...
        for (int i = nextLiveDoc(0, liveDocs, maxDoc); i < maxDoc; i = nextLiveDoc(i + 1, liveDocs, maxDoc)) {
          final Fields vectors = reader.getTermVectors(i);
          addAllDocVectors(vectors, mergeState);
          ++docCount;
          mergeState.checkAbort.work(300);
        }
      } else {
        final CompressingStoredFieldsIndexReader index = matchingVectorsReader.getIndex();
        final IndexInput vectorsStream = matchingVectorsReader.getVectorsStream();
        for (int i = nextLiveDoc(0, liveDocs, maxDoc); i < maxDoc; ) {
          if (pendingDocs.isEmpty()
              && (i == 0 || index.getStartPointer(i - 1) < index.getStartPointer(i))) { // start of a chunk
            final long startPointer = index.getStartPointer(i);
            vectorsStream.seek(startPointer);
            final int docBase = vectorsStream.readVInt();
            final int chunkDocs = vectorsStream.readVInt();
            assert docBase + chunkDocs <= matchingSegmentReader.maxDoc();
            if (docBase + chunkDocs < matchingSegmentReader.maxDoc()
                && nextDeletedDoc(docBase, liveDocs, docBase + chunkDocs) == docBase + chunkDocs) {
              final long chunkEnd = index.getStartPointer(docBase + chunkDocs);
              final long chunkLength = chunkEnd - vectorsStream.getFilePointer();
              indexWriter.writeIndex(chunkDocs, this.vectorsStream.getFilePointer());
              this.vectorsStream.writeVInt(docCount);
              this.vectorsStream.writeVInt(chunkDocs);
              this.vectorsStream.copyBytes(vectorsStream, chunkLength);
              docCount += chunkDocs;
              this.numDocs += chunkDocs;
              mergeState.checkAbort.work(300 * chunkDocs);
              i = nextLiveDoc(docBase + chunkDocs, liveDocs, maxDoc);
            } else {
              for (; i < docBase + chunkDocs; i = nextLiveDoc(i + 1, liveDocs, maxDoc)) {
                final Fields vectors = reader.getTermVectors(i);
                addAllDocVectors(vectors, mergeState);
                ++docCount;
                mergeState.checkAbort.work(300);
              }
            }
          } else {
            final Fields vectors = reader.getTermVectors(i);
            addAllDocVectors(vectors, mergeState);
            ++docCount;
            mergeState.checkAbort.work(300);
            i = nextLiveDoc(i + 1, liveDocs, maxDoc);
          }

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    ft.setStoreTermVectorOffsets(true);
    doc.add(new Field("f", "a", ft));
    doc.add(new Field("f", "a", ft));
    writer.addDocument(doc, a);
    final AtomicReader reader = getOnlySegmentReader(writer.getReader());
    final Fields fields = reader.getTermVectors(0);
    final Terms terms = fields.terms("f");
    final TermsEnum te = terms.iterator(null);
    assertEquals(new BytesRef("a"), te.next());
    final DocsAndPositionsEnum dpe = te.docsAndPositions(null, null);
    assertEquals(0, dpe.nextDoc());
    assertEquals(2, dpe.freq());

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  }


  private void duellReaders(CompositeReader other, AtomicReader memIndexReader)
      throws IOException {
    AtomicReader competitor = SlowCompositeReaderWrapper.wrap(other);
    Fields memFields = memIndexReader.fields();
    for (String field : competitor.fields()) {
      Terms memTerms = memFields.terms(field);
      Terms iwTerms = memIndexReader.terms(field);
      if (iwTerms == null) {
        assertNull(memTerms);
      } else {
        NumericDocValues normValues = competitor.getNormValues(field);

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   */
  public static TermStats[] getHighFreqTerms(IndexReader reader, int numTerms, String field, Comparator<TermStats> comparator) throws Exception {
    TermStatsQueue tiq = null;
    
    if (field != null) {
      Fields fields = MultiFields.getFields(reader);
      if (fields == null) {
        throw new RuntimeException("field " + field + " not found");
      }
      Terms terms = fields.terms(field);
      if (terms != null) {
        TermsEnum termsEnum = terms.iterator(null);
        tiq = new TermStatsQueue(numTerms, comparator);
        tiq.fill(field, termsEnum);
      }
    } else {
      Fields fields = MultiFields.getFields(reader);
      if (fields == null) {
        throw new RuntimeException("no fields found for this index");
      }
      tiq = new TermStatsQueue(numTerms, comparator);
      for (String fieldName : fields) {
        Terms terms = fields.terms(fieldName);
        if (terms != null) {
          tiq.fill(fieldName, terms.iterator(null));
        }
      }
    }

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  }


  @Override
  public Fields get(int docID) throws IOException {
    if (tvx != null) {
      Fields fields = new TVFields(docID);
      if (fields.size() == 0) {
        // TODO: we can improve writer here, eg write 0 into
        // tvx file, so we know on first read from tvx that
        // this doc has no TVs
        return null;
      } else {

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    }
  }


  private static List<Term> sample(Random random, IndexReader reader, int size) throws IOException {
    List<Term> sample = new ArrayList<Term>();
    Fields fields = MultiFields.getFields(reader);
    for (String field : fields) {
      Terms terms = fields.terms(field);
      assertNotNull(terms);
      TermsEnum termsEnum = terms.iterator(null);
      while (termsEnum.next() != null) {
        if (sample.size() >= size) {
          int pos = random.nextInt(size);

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    Set<String> termSet = fieldQuery.getTermSet( fieldName );
    // just return to make null snippet if un-matched fieldName specified when fieldMatch == true
    if( termSet == null ) return;


    final Fields vectors = reader.getTermVectors(docId);
    if (vectors == null) {
      // null snippet
      return;
    }


    final Terms vector = vectors.terms(fieldName);
    if (vector == null) {
      // null snippet
      return;
    }

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  }


  private void duellReaders(CompositeReader other, AtomicReader memIndexReader)
      throws IOException {
    AtomicReader competitor = SlowCompositeReaderWrapper.wrap(other);
    Fields memFields = memIndexReader.fields();
    for (String field : competitor.fields()) {
      Terms memTerms = memFields.terms(field);
      Terms iwTerms = memIndexReader.terms(field);
      if (iwTerms == null) {
        assertNull(memTerms);
      } else {
        NumericDocValues normValues = competitor.getNormValues(field);

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      _running = running;
    }


    @Override
    public Fields fields() throws IOException {
      Fields fields = super.fields();
      if (fields == null) {
        return null;
      }
      return new ExitableFields(fields, _running);
    }

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