Package org.apache.lucene.search

Examples of org.apache.lucene.search.Explanation

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        /**
         * Returns an empty Explanation object.
         * @return an empty Explanation object.
         */
        public Explanation explain(int doc) {
            return new Explanation();
        }
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        /**
         * {@inheritDoc}
         */
        public Explanation explain(IndexReader reader, int doc) throws IOException {
            return new Explanation();
        }
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        /**
         * Returns an empty Explanation object.
         * @return an empty Explanation object.
         */
        public Explanation explain(int doc) {
            return new Explanation();
        }
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            throws IOException {
        super(Similarity.getDefault());
        this.reader = reader;
        this.field = field;
        matchExpl
                = new Explanation(Similarity.getDefault().idf(reader.maxDoc(),
                        reader.maxDoc()),
                        "matchAll");
        calculateDocFilter();
    }
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    /**
     * {@inheritDoc}
     */
    public Explanation explain(IndexReader reader, int doc) throws IOException {
        return new Explanation(Similarity.getDefault().idf(reader.maxDoc(), reader.maxDoc()),
                "matchAll");
    }
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    Query q = req.getQuery();
    if (req.isShowExplanation()) {
      for (BrowseHit hit : hits) {
        try {
          int doc = hit.getDocid();
          Explanation expl = _indexSearcher.explain(q, doc);
          hit.setExplanation(expl);
        } catch (IOException e) {
          logger.error(e.getMessage(), e);
          result.addError(e.getMessage());
        }
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    @Override public float lengthNorm(FieldInvertState state) { return state.getBoost(); }
    @Override public float tf(float freq) { return freq; }
    @Override public float sloppyFreq(int distance) { return 2.0f; }
    @Override public float idf(long docFreq, long numDocs) { return 1.0f; }
    @Override public Explanation idfExplain(CollectionStatistics collectionStats, TermStatistics[] termStats) {
      return new Explanation(1.0f, "Inexplicable");
    }
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      }
    }
  }

  public Explanation explain(int documentId) {
    Explanation explanation = null;
    SearchFactoryImplementor searchFactoryImplementor = getSearchFactoryImplementor();
    Searcher searcher = buildSearcher( searchFactoryImplementor );
    if ( searcher == null ) {
      throw new SearchException(
          "Unable to build explanation for document id:"
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          result.setDescription("weight("+this.getQuery()+" in "+doc+") [" + similarity.getClass().getSimpleName() + "], result of:");
          while (scorer.nextNode()) {
            final ComplexExplanation nodeMatch = new ComplexExplanation();
            nodeMatch.setDescription("in "+scorer.node()+"), result of:");
            final float freq = scorer.freqInNode();
            final Explanation scoreExplanation = docScorer.explain(doc, new Explanation(freq, "termFreq=" + freq));
            nodeMatch.setValue(scoreExplanation.getValue());
            nodeMatch.setMatch(true);
            nodeMatch.addDetail(scoreExplanation);
            result.addDetail(nodeMatch);
          }
          result.setMatch(true);
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      for (final Weight w : weights) {
        final NodeBooleanClause c = cIter.next();
        if (w.scorer(context, true, true, context.reader().getLiveDocs()) == null) {
          if (c.isRequired()) {
            fail = true;
            final Explanation r = new Explanation(0.0f, "no match on required " +
                "clause (" + c.getQuery().toString() + ")");
            sumExpl.addDetail(r);
          }
          continue;
        }
        final Explanation e = w.explain(context, doc);
        if (e.isMatch()) {
          if (!c.isProhibited()) {
            sumExpl.addDetail(e);
            sum += e.getValue();
            coord++;
          }
          else {
            final Explanation r =
              new Explanation(0.0f, "match on prohibited clause (" +
                c.getQuery().toString() + ")");
            r.addDetail(e);
            sumExpl.addDetail(r);
            fail = true;
          }
        }
        else if (c.isRequired()) {
          final Explanation r = new Explanation(0.0f, "no match on required " +
              "clause (" + c.getQuery().toString() + ")");
          r.addDetail(e);
          sumExpl.addDetail(r);
          fail = true;
        }
      }
      if (fail) {
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Related Classes of org.apache.lucene.search.Explanation

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  • com.browseengine.bobo.api.MultiBoboBrowser
  • com.browseengine.bobo.facets.impl.CompactMultiValueFacetHandler$CompactMultiValueDocScorer
  • com.browseengine.bobo.facets.impl.MultiValueFacetHandler$MultiValueDocScorer
  • com.browseengine.bobo.query.scoring.DefaultFacetTermScoringFunction
  • com.browseengine.bobo.query.scoring.MultiplicativeFacetTermScoringFunction
  • com.browseengine.bobo.test.BoboTestCase
  • lucli.LuceneMethods
  • org.apache.jackrabbit.core.query.lucene.ChildAxisQuery$ChildAxisWeight
  • org.apache.jackrabbit.core.query.lucene.DerefQuery$DerefWeight
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