Examples of org.apache.lucene.util.AttributeSource

org.apache.lucene.util.AttributeSource
An AttributeSource contains a list of different {@link AttributeImpl}s, and methods to add and get them. There can only be a single instance of an attribute in the same AttributeSource instance. This is ensured by passing in the actual type of the Attribute (Class<Attribute>) to the {@link #addAttribute(Class)}, which then checks if an instance of that type is already present. If yes, it returns the instance, otherwise it creates a new instance and returns it.

        exhausted = true;
        input.end();
        endState = captureState();
        numFillerTokensToInsert = Math.min(posIncrAtt.getPositionIncrement(), maxShingleSize - 1);
        if (numFillerTokensToInsert > 0) {
          nextInputStreamToken = new AttributeSource(getAttributeFactory());
          nextInputStreamToken.addAttribute(CharTermAttribute.class);
          OffsetAttribute newOffsetAtt = nextInputStreamToken.addAttribute(OffsetAttribute.class);
          newOffsetAtt.setOffset(offsetAtt.endOffset(), offsetAtt.endOffset());
          // Recurse/loop just once:
          return getNextToken(target);

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   */
  private DocsEnum getOther(DocsEnum de) {
    if (de == null) {
      return null;
    } else {
      final AttributeSource atts = de.attributes();
      return atts.addAttribute(PulsingEnumAttribute.class).enums().get(this);
    }
  }

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  /** 
   * for a docsenum, sets the 'other' reused enum.
   * see getOther for an example.
   */
  private DocsEnum setOther(DocsEnum de, DocsEnum other) {
    final AttributeSource atts = de.attributes();
    return atts.addAttribute(PulsingEnumAttribute.class).enums().put(this, other);
  }

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  /** Convenience method, if no attributes are needed:
   * This simply passes empty attributes and is equal to:
   * <code>getTermsEnum(terms, new AttributeSource())</code>
   */
  protected final TermsEnum getTermsEnum(Terms terms) throws IOException {
    return getTermsEnum(terms, new AttributeSource());
  }

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  protected TermsEnum() {
  }


  /** Returns the related attributes. */
  public AttributeSource attributes() {
    if (atts == null) atts = new AttributeSource();
    return atts;
  }

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    return searcher.search(query, null, 1000).totalHits;
  }


  public void testMatchAll() throws Exception {
    Terms terms = MultiFields.getTerms(searcher.getIndexReader(), FN);
    TermsEnum te = new RegexQuery(new Term(FN, "jum.")).getTermsEnum(terms, new AttributeSource() /*dummy*/);
    // no term should match
    assertNull(te.next());
  }

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        if (!processedTerms.contains(term)) {
          processedTerms.add(term);
          ScoreTermQueue variantsQ = new ScoreTermQueue(MAX_VARIANTS_PER_TERM); //maxNum variants considered for any one term
          float minScore = 0;
          Term startTerm = new Term(f.fieldName, term);
          AttributeSource atts = new AttributeSource();
          MaxNonCompetitiveBoostAttribute maxBoostAtt =
            atts.addAttribute(MaxNonCompetitiveBoostAttribute.class);
          SlowFuzzyTermsEnum fe = new SlowFuzzyTermsEnum(terms, atts, startTerm, f.minSimilarity, f.prefixLength);
          //store the df so all variants use same idf
          int df = reader.docFreq(startTerm);
          int numVariants = 0;
          int totalVariantDocFreqs = 0;

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   */
  public abstract int freq() throws IOException;
  
  /** Returns the related attributes. */
  public AttributeSource attributes() {
    if (atts == null) atts = new AttributeSource();
    return atts;
  }

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   * @throws IOException If I/O related errors occur
   */
  protected Collection<ScoreTerm> suggestSimilar(Term term, int numSug, IndexReader ir, int docfreq, int editDistance,
                                                 float accuracy, final CharsRef spare) throws IOException {
    
    AttributeSource atts = new AttributeSource();
    MaxNonCompetitiveBoostAttribute maxBoostAtt =
      atts.addAttribute(MaxNonCompetitiveBoostAttribute.class);
    Terms terms = MultiFields.getTerms(ir, term.field());
    if (terms == null) {
      return Collections.emptyList();
    }
    FuzzyTermsEnum e = new FuzzyTermsEnum(terms, atts, term, editDistance, Math.max(minPrefix, editDistance-1), true);

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org.apache.lucene.analysis.shingle.ShingleFilter

org.apache.lucene.analysis.synonym.SlowSynonymFilter

org.apache.lucene.analysis.synonym.SynonymFilter

org.apache.lucene.codecs.pulsing.PulsingPostingsReader

org.apache.lucene.index.DocsEnum

org.apache.lucene.index.TermsEnum

org.apache.lucene.sandbox.queries.FuzzyLikeThisQuery

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org.apache.lucene.search.MultiTermQuery

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