Package org.apache.lucene.util

Examples of org.apache.lucene.util.Bits

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    public void undeleteAll()  {
      final int maxDoc = in.maxDoc();
      liveDocs = new FixedBitSet(in.maxDoc());
      if (in.hasDeletions()) {
        final Bits oldLiveDocs = in.getLiveDocs();
        assert oldLiveDocs != null;
        // this loop is a little bit ineffective, as Bits has no nextSetBit():
        for (int i = 0; i < maxDoc; i++) {
          if (oldLiveDocs.get(i)) liveDocs.set(i);
        }
      } else {
        // mark all docs as valid
        liveDocs.set(0, maxDoc);
      }
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    }
   
    @Override
    public Bits getDocsWithField(FieldInfo field) throws IOException {
      assert field.getDocValuesType() != null;
      Bits bits = in.getDocsWithField(field);
      assert bits != null;
      assert bits.length() == maxDoc;
      return new AssertingAtomicReader.AssertingBits(bits);
    }
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    // expected term:
    assertEquals(term, termsEnum.term());

    // 50% of the time time pass liveDocs:
    boolean useLiveDocs = options.contains(Option.LIVE_DOCS) && random().nextBoolean();
    Bits liveDocs;
    if (useLiveDocs) {
      liveDocs = globalLiveDocs;
      if (VERBOSE) {
        System.out.println("  use liveDocs");
      }
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    DirectoryReader reader = w.getReader();
    assertEquals(docCount, reader.numDocs());
    List<AtomicReaderContext> leaves = reader.leaves();
    for (AtomicReaderContext atomicReaderContext : leaves) {
      AtomicReader ar = atomicReaderContext.reader();
      Bits liveDocs = ar.getLiveDocs();
      int maxDoc = ar.maxDoc();
      for (int i = 0; i < maxDoc; i++) {
        if (liveDocs == null || liveDocs.get(i)) {
          assertTrue(liveIds.remove(ar.document(i).get("id")));
        }
      }
    }
    assertTrue(liveIds.isEmpty());
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    boolean rootWritten = false;
    int delta = atomicReader.maxDoc() / 100;
    if (delta == 0) delta = 1;
    int cnt = 0;
    bw = new BufferedWriter(new OutputStreamWriter(output, "UTF-8"));
    Bits live = atomicReader.getLiveDocs();
    try {
      // write out XML preamble
      if (preamble) {
        bw.write("<?xml version='1.0' encoding='UTF-8'?>\n");
      }
      bw.write("<" + rootElementName + ">\n");
      rootWritten = true;
      if (info) {
        // write out some statistics
        writeIndexInfo(bw);
      }
      Document doc = null;
      int i = -1;
      if (ranges == null) {
        ranges = new Ranges();
        ranges.set(0, atomicReader.maxDoc());
      }
      if (ranges.cardinality() > 0) {
        while ( (i = ranges.nextSetBit(++i)) != -1) {
          if (i >= atomicReader.maxDoc()) {
            break;
          }
          if (abort) {
            pn.message = "User requested abort.";
            pn.aborted = true;
            running = false;
            setChanged();
            notifyObservers(pn);
            break;
          }
          if (live != null && !live.get(i)) continue; // skip deleted docs
          doc = atomicReader.document(i);
          // write out fields
          writeDoc(bw, i, doc, decode, live);
          pn.curValue = i + 1;
          cnt++;
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  public static long getTotalTermFreq(IndexReader reader, String field, BytesRef termtext) throws Exception {
    BytesRef br = termtext;
    long totalTF = 0;
    try {
      Bits liveDocs = MultiFields.getLiveDocs(reader);
      //totalTF = MultiFields.totalTermFreq(reader, field, termtext);     
      totalTF = reader.totalTermFreq(new Term(field, br));
      return totalTF;
    } catch (Exception e) {
      return 0;
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    public Scorer scorer(final AtomicReaderContext context, final boolean scoreDocsInOrder,
                         final boolean topScorer, final Bits acceptDocs)
    throws IOException {
      assert !terms.isEmpty();
      final AtomicReader reader = context.reader();
      final Bits liveDocs = acceptDocs;
      final PostingsAndPosition[] postings = new PostingsAndPosition[terms.size()];

      final Terms fieldTerms = reader.terms(field);
      if (fieldTerms == null) {
        return null;
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    try {
      int next = docsEnum.nextDoc();
      if (next == DocIdSetIterator.NO_MORE_DOCS) {
        return false;
      }
      Bits liveDocs = MultiFields.getLiveDocs(reader);
      if (liveDocs != null) {
        while (!liveDocs.get(docsEnum.docID())) {
          next = docsEnum.nextDoc();
        }
      }
      return next == DocIdSetIterator.NO_MORE_DOCS ? false : true;
    } catch (IOException e) {
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      TreeSet<Term> extractedTerms = new TreeSet<Term>();
      q.extractTerms(extractedTerms);
      for (Term term : extractedTerms) {
        termContexts.put(term, TermContext.build(context, term));
      }
      Bits acceptDocs = context.reader().getLiveDocs();
      final Spans spans = q.getSpans(context, acceptDocs, termContexts);

      // collect span positions
      while (spans.next()) {
        spanPositions.add(new PositionSpan(spans.start(), spans.end() - 1));
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      if (i == 0) {
        int expected = 5;
        assertEquals(expected, reader.docFreq(new Term("contents", "here")));
        assertEquals(expected, reader.maxDoc());
        int numDel = 0;
        final Bits liveDocs = MultiFields.getLiveDocs(reader);
        assertNotNull(liveDocs);
        for(int j=0;j<reader.maxDoc();j++) {
          if (!liveDocs.get(j))
            numDel++;
          else {
            reader.document(j);
            reader.getTermVectors(j);
          }
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