Examples of org.apache.lucene.search.ComplexExplanation

org.apache.lucene.search.ComplexExplanation
Expert: Describes the score computation for document and query, andcan distinguish a match independent of a positive value.

      for(int i = 0; i < valSrcWeights.length; i++) {
        valSrcExpls[i] = valSrcWeights[i].explain(reader, doc);
      }
      Explanation customExp = CustomScoreQuery.this.getCustomScoreProvider(reader).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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    public Explanation explain(AtomicReaderContext context, int doc) throws IOException {
      BlockJoinScorer scorer = (BlockJoinScorer) scorer(context, true, false, context.reader().getLiveDocs());
      if (scorer != null && scorer.advance(doc) == doc) {
        return scorer.explain(context.docBase);
      }
      return new ComplexExplanation(false, 0.0f, "Not a match");
    }

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    }


    public Explanation explain(int docBase) throws IOException {
      int start = docBase + prevParentDoc + 1; // +1 b/c prevParentDoc is previous parent doc
      int end = docBase + parentDoc - 1; // -1 b/c parentDoc is parent doc
      return new ComplexExplanation(
          true, score(), String.format(Locale.ROOT, "Score based on child doc range from %d to %d", start, end)
      );
    }

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        if (scorer != null) {
          if (scorer.advanceForExplainOnly(doc) == doc) {
            return scorer.explain();
          }
        }
        return new ComplexExplanation(false, 0.0f, "Not a match");
      }


      @Override
      public Query getQuery() {
        return TermsIncludingScoreQuery.this;

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    public float score() throws IOException {
      return scores[ords[scoreUpto]];
    }


    Explanation explain() throws IOException {
      return new ComplexExplanation(true, score(), "Score based on join value " + termsEnum.term().utf8ToString());
    }

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      for(int i = 0; i < valSrcWeights.length; i++) {
        valSrcExpls[i] = valSrcWeights[i].explain(info, doc);
      }
      Explanation customExp = CustomScoreQuery.this.getCustomScoreProvider(info).customExplain(doc,subQueryExpl,valSrcExpls);
      float sc = getBoost() * customExp.getValue();
      Explanation res = new ComplexExplanation(
        true, sc, CustomScoreQuery.this.toString() + ", product of:");
      res.addDetail(customExp);
      res.addDetail(new Explanation(getBoost(), "queryBoost")); // actually using the q boost as q weight (== weight value)
      return res;
    }

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          expl.setValue(scoreExplanation.getValue());
          String field = ((SpanQuery)getQuery()).getField();
          // now the payloads part
          Explanation payloadExpl = function.explain(doc, field, scorer.payloadsSeen, scorer.payloadScore);
          // combined
          ComplexExplanation result = new ComplexExplanation();
          result.addDetail(expl);
          result.addDetail(payloadExpl);
          result.setValue(expl.getValue() * payloadExpl.getValue());
          result.setDescription("PayloadNearQuery, product of:");
          return result;
        }
      }
      
      return new ComplexExplanation(false, 0.0f, "no matching term");
    }

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          // would be a good idea
          String field = ((SpanQuery)getQuery()).getField();
          Explanation payloadExpl = function.explain(doc, field, scorer.payloadsSeen, scorer.payloadScore);
          payloadExpl.setValue(scorer.getPayloadScore());
          // combined
          ComplexExplanation result = new ComplexExplanation();
          if (includeSpanScore) {
            result.addDetail(expl);
            result.addDetail(payloadExpl);
            result.setValue(expl.getValue() * payloadExpl.getValue());
            result.setDescription("btq, product of:");
          } else {
            result.addDetail(payloadExpl);
            result.setValue(payloadExpl.getValue());
            result.setDescription("btq(includeSpanScore=false), result of:");
          }
          result.setMatch(true); // LUCENE-1303
          return result;
        }
      }
      
      return new ComplexExplanation(false, 0.0f, "no matching term");
    }

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    public Explanation explain(AtomicReaderContext context, int doc) throws IOException {
      BlockJoinScorer scorer = (BlockJoinScorer) scorer(context, true, false, context.reader().getLiveDocs());
      if (scorer != null && scorer.advance(doc) == doc) {
        return scorer.explain(context.docBase);
      }
      return new ComplexExplanation(false, 0.0f, "Not a match");
    }

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    }


    public Explanation explain(int docBase) throws IOException {
      int start = docBase + prevParentDoc + 1; // +1 b/c prevParentDoc is previous parent doc
      int end = docBase + parentDoc - 1; // -1 b/c parentDoc is parent doc
      return new ComplexExplanation(
          true, score(), String.format(Locale.ROOT, "Score based on child doc range from %d to %d", start, end)
      );
    }

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