Examples of org.apache.lucene.index.DocsEnum

org.apache.lucene.index.DocsEnum
Iterates through the documents and term freqs. NOTE: you must first call {@link #nextDoc} before usingany of the per-doc methods.

    
    IndexReader ir = iw.getReader();
    iw.close();


    TermsEnum te = MultiFields.getTerms(ir, "field").iterator(null);
    DocsEnum de = null;
    
    for (int i = 0; i < 10050; i++) {
      String expected = df.format(i);
      assertEquals(expected, te.next().utf8ToString());
      de = _TestUtil.docs(random(), te, null, de, DocsEnum.FLAG_NONE);
      assertTrue(de.nextDoc() != DocIdSetIterator.NO_MORE_DOCS);
      assertEquals(DocIdSetIterator.NO_MORE_DOCS, de.nextDoc());
    }
    ir.close();


    _TestUtil.checkIndex(dir);
    dir.close();

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          @Override
          public DocIdSet getDocIdSet(AtomicReaderContext context,
              Bits acceptDocs) throws IOException {
            final boolean nullBitset = random().nextInt(10) == 5;
            final AtomicReader reader = context.reader();
            DocsEnum termDocsEnum = reader.termDocsEnum(new Term("field", "0"));
            if (termDocsEnum == null) {
              return null; // no docs -- return null
            }
            final BitSet bitSet = new BitSet(reader.maxDoc());
            int d;
            while ((d = termDocsEnum.nextDoc()) != DocsEnum.NO_MORE_DOCS) {
              bitSet.set(d, true);
            }
            return new DocIdSet() {
              
              @Override

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          public Bits bits() throws IOException {
             return null;
          }
          @Override
          public DocIdSetIterator iterator() throws IOException {
            final DocsEnum termDocsEnum = context.reader().termDocsEnum(new Term("field", "0"));
            if (termDocsEnum == null) {
              return null;
            }
            return new DocIdSetIterator() {
              boolean nextCalled;
              boolean advanceCalled;
              @Override
              public int nextDoc() throws IOException {
                assertTrue("queryFirst: "+ queryFirst + " advanced: " + advanceCalled + " next: "+ nextCalled, nextCalled || advanceCalled ^ !queryFirst);  
                nextCalled = true;
                return termDocsEnum.nextDoc();
              }
              
              @Override
              public int docID() {
                return termDocsEnum.docID();
              }
              
              @Override
              public int advance(int target) throws IOException {
                assertTrue("queryFirst: "+ queryFirst + " advanced: " + advanceCalled + " next: "+ nextCalled, advanceCalled || nextCalled ^ queryFirst);  
                advanceCalled = true;
                return termDocsEnum.advance(target);
              }
              
              @Override
              public long cost() {
                return termDocsEnum.cost();
              } 
            };
          }
          
        };

View Full Code Here


      // TODO: use Uninvert?


      if (terms != null) {
        final TermsEnum termsEnum = terms.iterator(null);
        DocsEnum docs = null;


        while(true) {
          final BytesRef term = termsEnum.next();
          if (term == null) {
            break;
          }
          if (termOrd >= termCountHardLimit) {
            break;
          }


          termOrdToBytesOffset.add(bytes.copyUsingLengthPrefix(term));
          docs = termsEnum.docs(null, docs, DocsEnum.FLAG_NONE);
          while (true) {
            final int docID = docs.nextDoc();
            if (docID == DocIdSetIterator.NO_MORE_DOCS) {
              break;
            }
            // Store 1+ ord into packed bits
            docToTermOrd.set(docID, 1+termOrd);

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      bytes.copyUsingLengthPrefix(new BytesRef());


      if (terms != null) {
        int termCount = 0;
        final TermsEnum termsEnum = terms.iterator(null);
        DocsEnum docs = null;
        while(true) {
          if (termCount++ == termCountHardLimit) {
            // app is misusing the API (there is more than
            // one term per doc); in this case we make best
            // effort to load what we can (see LUCENE-2142)
            break;
          }


          final BytesRef term = termsEnum.next();
          if (term == null) {
            break;
          }
          final long pointer = bytes.copyUsingLengthPrefix(term);
          docs = termsEnum.docs(null, docs, DocsEnum.FLAG_NONE);
          while (true) {
            final int docID = docs.nextDoc();
            if (docID == DocIdSetIterator.NO_MORE_DOCS) {
              break;
            }
            docToOffset.set(docID, pointer);
          }

View Full Code Here

          }
        }


        final TermsEnum termsEnum = termsEnum(terms);


        DocsEnum docs = null;
        FixedBitSet docsWithField = null;
        while(true) {
          final BytesRef term = termsEnum.next();
          if (term == null) {
            break;
          }
          visitTerm(term);
          docs = termsEnum.docs(null, docs, DocsEnum.FLAG_NONE);
          while (true) {
            final int docID = docs.nextDoc();
            if (docID == DocIdSetIterator.NO_MORE_DOCS) {
              break;
            }
            visitDoc(docID);
            if (setDocsWithField) {

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        if (termsDocCount == maxDoc) {
          // Fast case: all docs have this field:
          return new Bits.MatchAllBits(maxDoc);
        }
        final TermsEnum termsEnum = terms.iterator(null);
        DocsEnum docs = null;
        while(true) {
          final BytesRef term = termsEnum.next();
          if (term == null) {
            break;
          }
          if (res == null) {
            // lazy init
            res = new FixedBitSet(maxDoc);
          }


          docs = termsEnum.docs(null, docs, DocsEnum.FLAG_NONE);
          // TODO: use bulk API
          while (true) {
            final int docID = docs.nextDoc();
            if (docID == DocIdSetIterator.NO_MORE_DOCS) {
              break;
            }
            res.set(docID);
          }

View Full Code Here

            
          }
        } 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());
            }
          }
        }
      }

View Full Code Here

  public void testDocsEnumStart() throws Exception {
    Analyzer analyzer = new MockAnalyzer(random());
    MemoryIndex memory = new MemoryIndex(random().nextBoolean(),  random().nextInt(50) * 1024 * 1024);
    memory.addField("foo", "bar", analyzer);
    AtomicReader reader = (AtomicReader) memory.createSearcher().getIndexReader();
    DocsEnum disi = _TestUtil.docs(random(), reader, "foo", new BytesRef("bar"), null, null, DocsEnum.FLAG_NONE);
    int docid = disi.docID();
    assertEquals(-1, docid);
    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")));
    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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        setOther(postings, reuse); // postings.other = reuse
      }
      return postings.reset(liveDocs, termState);
    } else {
      if (reuse instanceof PulsingDocsEnum) {
        DocsEnum wrapped = wrappedPostingsReader.docs(field, termState.wrappedTermState, liveDocs, getOther(reuse), flags);
        setOther(wrapped, reuse); // wrapped.other = reuse
        return wrapped;
      } else {
        return wrappedPostingsReader.docs(field, termState.wrappedTermState, liveDocs, reuse, flags);
      }

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