Examples of TermPositions

ivory.core.data.index.TermPositions

A Hadoop {@code Writable} that encodes the position of term occurrences within a document. Termoccurrences are represented as an array of ints, where each int represents a term position. These objects serve as intermediate values in building document-sorted inverted indexes.

In serialized form, term positions are represented as first-order differences (i.e., position gaps or p-gaps) using Gamma encoding. As an example, let's say a term has a term frequency of 5, at token positions [3, 53, 58, 90, 101]. Such an object would be encoded as the following sequence of ints: 3, 50, 5, 32, 11, each of which is expressed using Gamma codes. Every int except the first represents the difference between the previous term position and the current term position.
@author Jimmy Lin
org.apache.lucene.index.TermPositions
TermPositions provides an interface for enumerating the <document, frequency, <position>* > tuples for a term.
The document and frequency are the same as for a TermDocs. The positions portion lists the ordinal positions of each occurrence of a term in a document. @see IndexReader#termPositions
uk.ac.ucl.panda.utility.structure.TermPositions
TermPositions provides an interface for enumerating the <document, frequency, <position>* > tuples for a term.
The document and frequency are the same as for a TermDocs. The positions portion lists the ordinal positions of each occurrence of a term in a document. @see IndexReader#termPositions()

Examples of org.apache.lucene.index.TermPositions

  
    @Override
    public TermPositions termPositions() {
      if (DEBUG) System.err.println("MemoryIndexReader.termPositions");
      
      return new TermPositions() {
  
        private boolean hasNext;
        private int cursor = 0;
        private ArrayIntList current;
        private Term term;

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Examples of org.apache.lucene.index.TermPositions

      aprioriTermDocs.close();
      testTermDocs.close();


      // compare term positions


      TermPositions testTermPositions = testReader.termPositions(testTermEnum.term());
      TermPositions aprioriTermPositions = aprioriReader.termPositions(aprioriTermEnum.term());


      if (aprioriTermPositions != null) {


        for (int docIndex = 0; docIndex < aprioriReader.maxDoc(); docIndex++) {
          boolean hasNext = aprioriTermPositions.next();
          if (hasNext) {
            assertTrue(testTermPositions.next());


            assertEquals(aprioriTermPositions.freq(), testTermPositions.freq());




            for (int termPositionIndex = 0; termPositionIndex < aprioriTermPositions.freq(); termPositionIndex++) {
              int aprioriPos = aprioriTermPositions.nextPosition();
              int testPos = testTermPositions.nextPosition();


              if (aprioriPos != testPos) {
                assertEquals(aprioriPos, testPos);
              }




              assertEquals(aprioriTermPositions.isPayloadAvailable(), testTermPositions.isPayloadAvailable());
              if (aprioriTermPositions.isPayloadAvailable()) {
                assertEquals(aprioriTermPositions.getPayloadLength(), testTermPositions.getPayloadLength());
                byte[] aprioriPayloads = aprioriTermPositions.getPayload(new byte[aprioriTermPositions.getPayloadLength()], 0);
                byte[] testPayloads = testTermPositions.getPayload(new byte[testTermPositions.getPayloadLength()], 0);
                for (int i = 0; i < aprioriPayloads.length; i++) {
                  assertEquals(aprioriPayloads[i], testPayloads[i]);
                }
              }


            }
          }
        }


        aprioriTermPositions.close();
        testTermPositions.close();


      }
    }

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Examples of org.apache.lucene.index.TermPositions

    //    don't reset the stream here, the DocumentWriter should do that implicitly
    writer.addDocument(doc);
    writer.close();
    
    IndexReader reader = IndexReader.open(dir, true);
    TermPositions termPositions = reader.termPositions(new Term("preanalyzed", "term1"));
    assertTrue(termPositions.next());
    assertEquals(1, termPositions.freq());
    assertEquals(0, termPositions.nextPosition());


    termPositions.seek(new Term("preanalyzed", "term2"));
    assertTrue(termPositions.next());
    assertEquals(2, termPositions.freq());
    assertEquals(1, termPositions.nextPosition());
    assertEquals(3, termPositions.nextPosition());
    
    termPositions.seek(new Term("preanalyzed", "term3"));
    assertTrue(termPositions.next());
    assertEquals(1, termPositions.freq());
    assertEquals(2, termPositions.nextPosition());
    reader.close();
    
    // 3) reset stream and consume tokens again
    stream.reset();
    checkTokens(stream);

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Examples of org.apache.lucene.index.TermPositions

    termEnum.close();
    orderedTerms = terms.toArray(new InstantiatedTerm[terms.size()]);


    // create term-document informations
    for (InstantiatedTerm term : orderedTerms) {
      TermPositions termPositions = sourceIndexReader.termPositions(term.getTerm());
      int position = 0;
      while (termPositions.next()) {
        InstantiatedDocument document = documentsByNumber[termPositions.doc()];


        byte[][] payloads = new byte[termPositions.freq()][];
        int[] positions = new int[termPositions.freq()];
        for (int i = 0; i < termPositions.freq(); i++) {
          positions[i] = termPositions.nextPosition();


          if (termPositions.isPayloadAvailable()) {
            payloads[i] = new byte[termPositions.getPayloadLength()];
            termPositions.getPayload(payloads[i], 0);
          }
        }


        InstantiatedTermDocumentInformation termDocumentInformation = new InstantiatedTermDocumentInformation(term, document, positions, payloads);
        term.getAssociatedDocuments()[position++] = termDocumentInformation;

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Examples of org.apache.lucene.index.TermPositions

      if (terms.size() == 0)        // optimize zero-term case
        return null;


      TermPositions[] tps = new TermPositions[terms.size()];
      for (int i = 0; i < terms.size(); i++) {
        TermPositions p = reader.termPositions(terms.get(i));
        if (p == null)
          return null;
        tps[i] = p;
      }

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Examples of org.apache.lucene.index.TermPositions

  
    @Override
    public TermPositions termPositions() {
      if (DEBUG) System.err.println("MemoryIndexReader.termPositions");
      
      return new TermPositions() {
  
        private boolean hasNext;
        private int cursor = 0;
        private ArrayIntList current;
        private Term term;

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Examples of org.apache.lucene.index.TermPositions

    termEnum.close();
    orderedTerms = terms.toArray(new InstantiatedTerm[terms.size()]);


    // create term-document informations
    for (InstantiatedTerm term : orderedTerms) {
      TermPositions termPositions = sourceIndexReader.termPositions(term.getTerm());
      int position = 0;
      while (termPositions.next()) {
        InstantiatedDocument document = documentsByNumber[termPositions.doc()];


        byte[][] payloads = new byte[termPositions.freq()][];
        int[] positions = new int[termPositions.freq()];
        for (int i = 0; i < termPositions.freq(); i++) {
          positions[i] = termPositions.nextPosition();


          if (termPositions.isPayloadAvailable()) {
            payloads[i] = new byte[termPositions.getPayloadLength()];
            termPositions.getPayload(payloads[i], 0);
          }
        }


        InstantiatedTermDocumentInformation termDocumentInformation = new InstantiatedTermDocumentInformation(term, document, positions, payloads);
        term.getAssociatedDocuments()[position++] = termDocumentInformation;

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Examples of org.apache.lucene.index.TermPositions

      PhraseQuery.PostingsAndFreq[] postingsFreqs = new PhraseQuery.PostingsAndFreq[termArrays.size()];


      for (int pos=0; pos<postingsFreqs.length; pos++) {
        Term[] terms = termArrays.get(pos);


        final TermPositions p;
        int docFreq;


        if (terms.length > 1) {
          p = new MultipleTermPositions(reader, terms);

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Examples of org.apache.lucene.index.TermPositions

    }
  
    public TermPositions termPositions() {
      if (DEBUG) System.err.println("MemoryIndexReader.termPositions");
      
      return new TermPositions() {
  
        private boolean hasNext;
        private int cursor = 0;
        private ArrayIntList current;
        private Term term;

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Examples of org.apache.lucene.index.TermPositions

    writer.close();
    


    IndexSearcher searcher = new IndexSearcher(store);
    
    TermPositions pos = searcher.getIndexReader().termPositions(new Term("field", "1"));
    pos.next();
    // first token should be at position 0
    assertEquals(0, pos.nextPosition());
    
    pos = searcher.getIndexReader().termPositions(new Term("field", "2"));
    pos.next();
    // second token should be at position 2
    assertEquals(2, pos.nextPosition());
    
    PhraseQuery q;
    ScoreDoc[] hits;


    q = new PhraseQuery();

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