Package org.apache.lucene.search

Examples of org.apache.lucene.search.Explanation

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    }
    float valSrcScore = 1;
    for (int i = 0; i < valSrcExpls.length; i++) {
      valSrcScore *= valSrcExpls[i].getValue();
    }
    Explanation exp = new Explanation( valSrcScore * subQueryExpl.getValue(), "custom score: product of:");
    exp.addDetail(subQueryExpl);
    for (int i = 0; i < valSrcExpls.length; i++) {
      exp.addDetail(valSrcExpls[i]);
    }
    return exp;
  }
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  public Explanation customExplain(int doc, Explanation subQueryExpl, Explanation valSrcExpl) {
    float valSrcScore = 1;
    if (valSrcExpl != null) {
      valSrcScore *= valSrcExpl.getValue();
    }
    Explanation exp = new Explanation( valSrcScore * subQueryExpl.getValue(), "custom score: product of:");
    exp.addDetail(subQueryExpl);
    exp.addDetail(valSrcExpl);
    return exp;
  }
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      }
      return new CustomScorer(similarity, reader, this, subQueryScorer, valSrcScorers);
    }

    public Explanation explain(IndexReader reader, int doc) throws IOException {
      Explanation explain = doExplain(reader, doc);
      return explain == null ? new Explanation(0.0f, "no matching docs") : doExplain(reader, doc);
    }
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      return subQueryScore + valSrcScore;
    }
    /* (non-Javadoc)@see org.apache.lucene.search.function.CustomScoreQuery#customExplain(int, org.apache.lucene.search.Explanation, org.apache.lucene.search.Explanation)*/
    public Explanation customExplain(int doc, Explanation subQueryExpl, Explanation valSrcExpl) {
      float valSrcScore = valSrcExpl==null ? 0 : valSrcExpl.getValue();
      Explanation exp = new Explanation( valSrcScore + subQueryExpl.getValue(), "custom score: sum of:");
      exp.addDetail(subQueryExpl);
      if (valSrcExpl != null) {
        exp.addDetail(valSrcExpl);
      }
      return exp;     
    }
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    /* (non-Javadoc)@see org.apache.lucene.search.function.CustomScoreQuery#customExplain(int, org.apache.lucene.search.Explanation, org.apache.lucene.search.Explanation)*/
    public Explanation customExplain(int doc, Explanation subQueryExpl, Explanation valSrcExpls[]) {
      if (valSrcExpls.length == 0) {
        return subQueryExpl;
      }
      Explanation exp = new Explanation(valSrcExpls[0].getValue() + subQueryExpl.getValue(), "sum of:");
      exp.addDetail(subQueryExpl);
      exp.addDetail(valSrcExpls[0]);
      if (valSrcExpls.length == 1) {
        exp.setDescription("CustomMulAdd, sum of:");
        return exp;
      }
      Explanation exp2 = new Explanation(valSrcExpls[1].getValue() * exp.getValue(), "custom score: product of:");
      exp2.addDetail(valSrcExpls[1]);
      exp2.addDetail(exp);
      return exp2;     
    }
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    private Explanation doExplain(IndexReader reader, int doc) throws IOException {
      Scorer[] valSrcScorers = new Scorer[valSrcWeights.length];
      for(int i = 0; i < valSrcScorers.length; i++) {
         valSrcScorers[i] = valSrcWeights[i].scorer(reader, true, false);
      }
      Explanation subQueryExpl = subQueryWeight.explain(reader, doc);
      if (!subQueryExpl.isMatch()) {
        return subQueryExpl;
      }
      // match
      Explanation[] valSrcExpls = new Explanation[valSrcScorers.length];
      for(int i = 0; i < valSrcScorers.length; i++) {
        valSrcExpls[i] = valSrcScorers[i].explain(doc);
      }
      Explanation customExp = customExplain(doc,subQueryExpl,valSrcExpls);
      float sc = getValue() * customExp.getValue();
      Explanation res = new ComplexExplanation(
        true, sc, CustomScoreQuery.this.toString() + ", product of:");
      res.addDetail(customExp);
      res.addDetail(new Explanation(getValue(), "queryBoost")); // actually using the q boost as q weight (== weight value)
      return res;
    }
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    }
   
    // TODO: remove in 3.0
    /*(non-Javadoc) @see org.apache.lucene.search.Scorer#explain(int) */
    public Explanation explain(int doc) throws IOException {
      Explanation subQueryExpl = weight.subQueryWeight.explain(reader,doc);
      if (!subQueryExpl.isMatch()) {
        return subQueryExpl;
      }
      // match
      Explanation[] valSrcExpls = new Explanation[valSrcScorers.length];
      for(int i = 0; i < valSrcScorers.length; i++) {
        valSrcExpls[i] = valSrcScorers[i].explain(doc);
      }
      Explanation customExp = customExplain(doc,subQueryExpl,valSrcExpls);
      float sc = qWeight * customExp.getValue();
      Explanation res = new ComplexExplanation(
        true, sc, CustomScoreQuery.this.toString() + ", product of:");
      res.addDetail(customExp);
      res.addDetail(new Explanation(qWeight, "queryBoost")); // actually using the q boost as q weight (== weight value)
      return res;
    }
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   * not a direct test of NearSpans, but a demonstration of how/when
   * this causes problems
   */
  public void testSpanNearScorerExplain() throws Exception {
    SpanNearQuery q = makeQuery();
    Explanation e = searcher.explain(q, 1);
    assertTrue("Scorer explanation value for doc#1 isn't positive: "
               + e.toString(),
               0.0f < e.getValue());
  }
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    assertTrue("hits is null and it shouldn't be", hits != null);
    assertTrue("should be 10 hits", hits.totalHits == 10);
    for (int j = 0; j < hits.scoreDocs.length; j++) {
      ScoreDoc doc = hits.scoreDocs[j];
      assertTrue(doc.score + " does not equal: " + 3, doc.score == 3);
      Explanation explain = searcher.explain(query, hits.scoreDocs[j].doc);
      String exp = explain.toString();
      assertTrue(exp, exp.indexOf("AveragePayloadFunction") > -1);
      assertTrue(hits.scoreDocs[j].score + " explain value does not equal: " + 3, explain.getValue() == 3f);
    }
  }
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    assertTrue("hits is null and it shouldn't be", hits != null);
    assertTrue("should be 10 hits", hits.totalHits == 10);
    for (int j = 0; j < hits.scoreDocs.length; j++) {
      ScoreDoc doc = hits.scoreDocs[j];
      assertTrue(doc.score + " does not equal: " + 4, doc.score == 4);
      Explanation explain = searcher.explain(query, hits.scoreDocs[j].doc);
      String exp = explain.toString();
      assertTrue(exp, exp.indexOf("MaxPayloadFunction") > -1);
      assertTrue(hits.scoreDocs[j].score + " explain value does not equal: " + 4, explain.getValue() == 4f);
    }
  } 
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