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

org.apache.lucene.index.TermsEnum.docs()
Get {@link DocsEnum} for the current term. Do notcall this when the enum is unpositioned. This method will not return null. @param liveDocs unset bits are documents that should notbe returned @param reuse pass a prior DocsEnum for possible reuse

      Terms terms = indexReader.terms("body");
      TermsEnum iterator = terms.iterator(null);
      IdentityHashMap<DocsEnum, Boolean> enums = new IdentityHashMap<DocsEnum, Boolean>();
      MatchNoBits bits = new Bits.MatchNoBits(indexReader.maxDoc());
      while ((iterator.next()) != null) {
        DocsEnum docs = iterator.docs(random().nextBoolean() ? bits : new Bits.MatchNoBits(indexReader.maxDoc()), null, random().nextBoolean() ? DocsEnum.FLAG_FREQS : DocsEnum.FLAG_NONE);
        enums.put(docs, true);
      }
      
      assertEquals(terms.size(), enums.size());
    }

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      TermsEnum iterator = terms.iterator(null);
      IdentityHashMap<DocsEnum, Boolean> enums = new IdentityHashMap<DocsEnum, Boolean>();
      MatchNoBits bits = new Bits.MatchNoBits(open.maxDoc());
      DocsEnum docs = null;
      while ((iterator.next()) != null) {
        docs = iterator.docs(bits, docs, random().nextBoolean() ? DocsEnum.FLAG_FREQS : DocsEnum.FLAG_NONE);
        enums.put(docs, true);
      }
      
      assertEquals(1, enums.size());
      enums.clear();

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      assertEquals(1, enums.size());
      enums.clear();
      iterator = terms.iterator(null);
      docs = null;
      while ((iterator.next()) != null) {
        docs = iterator.docs(new Bits.MatchNoBits(open.maxDoc()), docs, random().nextBoolean() ? DocsEnum.FLAG_FREQS : DocsEnum.FLAG_NONE);
        enums.put(docs, true);
      }
      assertEquals(terms.size(), enums.size());
      
      enums.clear();

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      enums.clear();
      iterator = terms.iterator(null);
      docs = null;
      while ((iterator.next()) != null) {
        docs = iterator.docs(null, docs, random().nextBoolean() ? DocsEnum.FLAG_FREQS : DocsEnum.FLAG_NONE);
        enums.put(docs, true);
      }
      assertEquals(1, enums.size());  
    }
    IOUtils.close(writer, open, dir);

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      MatchNoBits bits = new Bits.MatchNoBits(firstReader.maxDoc());
      iterator = terms.iterator(null);
      DocsEnum docs = null;
      BytesRef term = null;
      while ((term = iterator.next()) != null) {
        docs = iterator.docs(null, randomDocsEnum("body", term, leaves2, bits), random().nextBoolean() ? DocsEnum.FLAG_FREQS : DocsEnum.FLAG_NONE);
        enums.put(docs, true);
      }
      assertEquals(terms.size(), enums.size());
      
      iterator = terms.iterator(null);

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          }
        } else {
          while(iwTermsIter.next() != null) {
            assertEquals(iwTermsIter.term(), memTermsIter.term());
            DocsEnum iwDocsAndPos = iwTermsIter.docs(null, null);
            DocsEnum memDocsAndPos = memTermsIter.docs(null, null);
            while(iwDocsAndPos.nextDoc() != DocsAndPositionsEnum.NO_MORE_DOCS) {
              assertEquals(iwDocsAndPos.docID(), memDocsAndPos.nextDoc());
              assertEquals(iwDocsAndPos.freq(), memDocsAndPos.freq());
            }
          }

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    assertTrue(disi.nextDoc() != DocIdSetIterator.NO_MORE_DOCS);
    
    // now reuse and check again
    TermsEnum te = reader.terms("foo").iterator(null);
    assertTrue(te.seekExact(new BytesRef("bar"), true));
    disi = te.docs(null, disi, DocsEnum.FLAG_NONE);
    docid = disi.docID();
    assertEquals(-1, docid);
    assertTrue(disi.nextDoc() != DocIdSetIterator.NO_MORE_DOCS);
    reader.close();
  }

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  @Test
  public void testDocsEnum() throws Exception {
    Bits mappedLiveDocs = randomLiveDocs(reader.maxDoc());
    TermsEnum termsEnum = reader.terms(DOCS_ENUM_FIELD).iterator(null);
    assertEquals(SeekStatus.FOUND, termsEnum.seekCeil(new BytesRef(DOCS_ENUM_TERM)));
    DocsEnum docs = termsEnum.docs(mappedLiveDocs, null);


    int doc;
    int prev = -1;
    while ((doc = docs.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) {
      assertTrue("document " + doc + " marked as deleted", mappedLiveDocs == null || mappedLiveDocs.get(doc));

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    while (++prev < reader.maxDoc()) {
      assertFalse("document " + prev + " not marked as deleted", mappedLiveDocs == null || mappedLiveDocs.get(prev));
    }


    DocsEnum reuse = docs;
    docs = termsEnum.docs(mappedLiveDocs, reuse);
    if (docs instanceof SortingDocsEnum) {
      assertTrue(((SortingDocsEnum) docs).reused(reuse)); // make sure reuse worked
    }
    doc = -1;
    prev = -1;

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          }
          dims[dim].docsEnums = new DocsEnum[drillDownTerms[dim].length];
          for(int i=0;i<drillDownTerms[dim].length;i++) {
            if (termsEnum.seekExact(drillDownTerms[dim][i].bytes(), false)) {
              dims[dim].freq = Math.max(dims[dim].freq, termsEnum.docFreq());
              dims[dim].docsEnums[i] = termsEnum.docs(null, null);
            }
          }
        }


        if (nullCount > 1) {

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