Examples of org.apache.lucene.util.BitVector

org.apache.lucene.util.BitVector
Optimized implementation of a vector of bits. This is more-or-less like java.util.BitSet, but also includes the following:
- a count() method, which efficiently computes the number of one bits;
- optimized read from and write to disk;
- inlinable get() method;
- store and load, as bit set or d-gaps, depending on sparseness;

    SegmentReader sr1 = SegmentReader.getOnlySegmentReader(r1);
    SegmentReader sr2 = (SegmentReader) rs2[0];


    // At this point they share the same BitVector
    assertTrue(sr1.deletedDocs==sr2.deletedDocs);
    final BitVector delDocs = sr1.deletedDocs;
    r1.close();


    r2.deleteDocument(0);
    assertTrue(delDocs==sr2.deletedDocs);
    r2.close();

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  }


  private void loadDeletedDocs() throws IOException {
    // NOTE: the bitvector is stored using the regular directory, not cfs
    if (hasDeletions(si)) {
      deletedDocs = new BitVector(directory(), si.getDelFileName());
      deletedDocsRef = new Ref();
      assert checkDeletedCounts();
    } else
      assert si.getDelCount() == 0;
  }

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    return si.hasSeparateNorms();
  }


  protected void doDelete(int docNum) {
    if (deletedDocs == null) {
      deletedDocs = new BitVector(maxDoc());
      deletedDocsRef = new Ref();
    }
    // there is more than 1 SegmentReader with a reference to this
    // deletedDocs BitVector so decRef the current deletedDocsRef,
    // clone the BitVector, create a new deletedDocsRef

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  public int getDelCount() throws IOException {
    if (delCount == -1) {
      if (hasDeletions()) {
        final String delFileName = getDelFileName();
        delCount = new BitVector(dir, delFileName).count();
      } else
        delCount = 0;
    }
    assert delCount <= docCount;
    return delCount;

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    SegmentReader sr1 = SegmentReader.getOnlySegmentReader(r1);
    SegmentReader sr2 = (SegmentReader) rs2[0];


    // At this point they share the same BitVector
    assertTrue(sr1.deletedDocs==sr2.deletedDocs);
    final BitVector delDocs = sr1.deletedDocs;
    r1.close();


    r2.deleteDocument(0);
    assertTrue(delDocs==sr2.deletedDocs);
    r2.close();

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    documentsByNumber = new InstantiatedDocument[sourceIndexReader.maxDoc()];


    if (sourceIndexReader.hasDeletions()) {
      deletedDocuments = new BitVector(sourceIndexReader.maxDoc());
    }


    // create documents
    for (int i = 0; i < sourceIndexReader.maxDoc(); i++) {
      if (sourceIndexReader.hasDeletions() && sourceIndexReader.isDeleted(i)) {

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        || (uncommittedDeletedDocuments != null && uncommittedDeletedDocuments.get(docNum))) {
      return;
    }


    if (uncommittedDeletedDocuments == null) {
      uncommittedDeletedDocuments = new BitVector(maxDoc());
    }


    uncommittedDeletedDocuments.set(docNum);
  }

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    fieldNameBuffer.clear();




    // update deleted documents bitset
    if (index.getDeletedDocuments() != null) {
      BitVector deletedDocuments = new BitVector(index.getDocumentsByNumber().length);
      for (int i = 0; i < index.getDeletedDocuments().size(); i++) {
        if (index.getDeletedDocuments().get(i)) {
          deletedDocuments.set(i);
        }
      }
      index.setDeletedDocuments(deletedDocuments);
    }

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  }


  private void loadDeletedDocs() throws IOException {
    // NOTE: the bitvector is stored using the regular directory, not cfs
    if (hasDeletions(si)) {
      deletedDocs = new BitVector(directory(), si.getDelFileName());
      deletedDocsRef = new Ref();
     
      assert si.getDelCount() == deletedDocs.count() : 
        "delete count mismatch: info=" + si.getDelCount() + " vs BitVector=" + deletedDocs.count();

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  }


  @Override
  protected void doDelete(int docNum) {
    if (deletedDocs == null) {
      deletedDocs = new BitVector(maxDoc());
      deletedDocsRef = new Ref();
    }
    // there is more than 1 SegmentReader with a reference to this
    // deletedDocs BitVector so decRef the current deletedDocsRef,
    // clone the BitVector, create a new deletedDocsRef

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