Examples of org.apache.lucene.index.TermsEnum.docsAndPositions()

org.apache.lucene.index.TermsEnum.docsAndPositions()
Get {@link DocsAndPositionsEnum} for the current term.Do not call this when the enum is unpositioned. This method will return null if positions were not indexed. @param liveDocs unset bits are documents that should notbe returned @param reuse pass a prior DocsAndPositionsEnum for possible reuse @see #docsAndPositions(Bits,DocsAndPositionsEnum,int)

        System.arraycopy(term.bytes, term.offset, termBytes, termOffset, term.length);
        termOffset += term.length;
        termOffsets[count+1] = termOffset;


        if (hasPos) {
          docsAndPositionsEnum = termsEnum.docsAndPositions(null, docsAndPositionsEnum);
        } else {
          docsEnum = termsEnum.docs(null, docsEnum);
        }


        final TermAndSkip ent;

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        if (state == null) { /* term doesnt exist in this segment */
          assert termNotInReader(reader, t): "no termstate found but term exists in reader";
          return null;
        }
        te.seekExact(t.bytes(), state);
        DocsAndPositionsEnum postingsEnum = te.docsAndPositions(liveDocs, null, DocsEnum.FLAG_NONE);


        // PhraseQuery on a field that did not index
        // positions.
        if (postingsEnum == null) {
          assert te.seekExact(t.bytes()) : "termstate found but no term exists in reader";

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    final boolean hasPayloads = vector.hasPayloads();
    final TermsEnum termsEnum = vector.iterator(null);
    BytesRef text;
    DocsAndPositionsEnum dpEnum = null;
    while((text = termsEnum.next()) != null) {
      dpEnum = termsEnum.docsAndPositions(null, dpEnum);
      assert dpEnum != null; // presumably checked by TokenSources.hasPositions earlier
      dpEnum.nextDoc();
      final int freq = dpEnum.freq();
      for (int j = 0; j < freq; j++) {
        int pos = dpEnum.nextPosition();

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    termsEnum = tpv.iterator(null);
    BytesRef text;
    DocsAndPositionsEnum dpEnum = null;
    while ((text = termsEnum.next()) != null) {


      dpEnum = termsEnum.docsAndPositions(null, dpEnum);
      if (dpEnum == null) {
        throw new IllegalArgumentException(
            "Required TermVector Offset information was not found");
      }
      final String term = text.utf8ToString();

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        final int freq = (int) termsEnum.totalTermFreq();
        
        startTerm(termsEnum.term(), freq);


        if (hasPositions || hasOffsets) {
          docsAndPositionsEnum = termsEnum.docsAndPositions(null, docsAndPositionsEnum);
          assert docsAndPositionsEnum != null;
          
          final int docID = docsAndPositionsEnum.nextDoc();
          assert docID != DocIdSetIterator.NO_MORE_DOCS;
          assert docsAndPositionsEnum.freq() == freq;

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  @Test
  public void testDocsAndPositionsEnum() throws Exception {
    TermsEnum termsEnum = reader.terms(DOC_POSITIONS_FIELD).iterator(null);
    assertEquals(SeekStatus.FOUND, termsEnum.seekCeil(new BytesRef(DOC_POSITIONS_TERM)));
    DocsAndPositionsEnum sortedPositions = termsEnum.docsAndPositions(null, null);
    int doc;
    
    // test nextDoc()
    while ((doc = sortedPositions.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) {
      int freq = sortedPositions.freq();

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      }
    }
    
    // test advance()
    final DocsAndPositionsEnum reuse = sortedPositions;
    sortedPositions = termsEnum.docsAndPositions(null, reuse);
    if (sortedPositions instanceof SortingDocsAndPositionsEnum) {
      assertTrue(((SortingDocsAndPositionsEnum) sortedPositions).reused(reuse)); // make sure reuse worked
    }
    doc = 0;
    while ((doc = sortedPositions.advance(doc + TestUtil.nextInt(random(), 1, 5))) != DocIdSetIterator.NO_MORE_DOCS) {

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      UnicodeUtil.UTF8toUTF16(text, spare);
      final String term = spare.toString();
      if (!termSet.contains(term)) {
        continue;
      }
      dpEnum = termsEnum.docsAndPositions(null, dpEnum);
      if (dpEnum == null) {
        // null snippet
        return;
      }

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    allEnums.clear();
    DocsAndPositionsEnum posReuse = null;
    te = segment.terms("foo").iterator(null);
    while (te.next() != null) {
      posReuse = te.docsAndPositions(null, posReuse);
      allEnums.put(posReuse, true);
    }
    
    assertEquals(2, allEnums.size());

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    allEnums.clear();
    DocsAndPositionsEnum posReuse = null;
    te = segment.terms("foo").iterator(null);
    while (te.next() != null) {
      posReuse = te.docsAndPositions(null, posReuse);
      allEnums.put(posReuse, true);
    }
    
    assertEquals(4, allEnums.size());

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