예제 #1
0
            /* Explain the score we computed for doc */
            public override Explanation Explain(IndexReader reader, int doc)
            {
                if (Enclosing_Instance.disjuncts.Count == 1)
                {
                    return(((Weight)weights[0]).Explain(reader, doc));
                }
                ComplexExplanation result = new ComplexExplanation();
                float max = 0.0f, sum = 0.0f;

                result.SetDescription(Enclosing_Instance.tieBreakerMultiplier == 0.0f?"max of:":"max plus " + Enclosing_Instance.tieBreakerMultiplier + " times others of:");
                for (System.Collections.IEnumerator iter = weights.GetEnumerator(); iter.MoveNext();)
                {
                    Explanation e = ((Weight)iter.Current).Explain(reader, doc);
                    if (e.IsMatch())
                    {
                        System.Boolean tempAux = true;
                        result.SetMatch(tempAux);
                        result.AddDetail(e);
                        sum += e.GetValue();
                        max  = System.Math.Max(max, e.GetValue());
                    }
                }
                result.SetValue(max + (sum - max) * Enclosing_Instance.tieBreakerMultiplier);
                return(result);
            }
예제 #2
0
            /* Explain the score we computed for doc */
            public virtual Explanation Explain(IndexReader reader, int doc)
            {
                if (Enclosing_Instance.disjuncts.Count == 1)
                {
                    return(((Weight)weights[0]).Explain(reader, doc));
                }
                ComplexExplanation result = new ComplexExplanation();
                float max = 0.0f, sum = 0.0f;

                result.SetDescription(Enclosing_Instance.tieBreakerMultiplier == 0.0f ? "max of:" : "max plus " + Enclosing_Instance.tieBreakerMultiplier + " times others of:");
                for (int i = 0; i < weights.Count; i++)
                {
                    Explanation e = ((Weight)weights[i]).Explain(reader, doc);
                    if (e.IsMatch())
                    {
                        System.Boolean tempAux = true;
                        result.SetMatch(tempAux);
                        result.AddDetail(e);
                        sum += e.GetValue();
                        max  = System.Math.Max(max, e.GetValue());
                    }
                }
                result.SetValue(max + (sum - max) * Enclosing_Instance.tieBreakerMultiplier);
                return(result);
            }
예제 #3
0
            public override Explanation Explain(IndexReader reader, int doc)
            {
                int minShouldMatch         = Enclosing_Instance.GetMinimumNumberShouldMatch();
                ComplexExplanation sumExpl = new ComplexExplanation();

                sumExpl.SetDescription("sum of:");
                int   coord            = 0;
                int   maxCoord         = 0;
                float sum              = 0.0f;
                bool  fail             = false;
                int   shouldMatchCount = 0;

                for (System.Collections.IEnumerator wIter = weights.GetEnumerator(), cIter = Enclosing_Instance.clauses.GetEnumerator(); wIter.MoveNext();)
                {
                    cIter.MoveNext();

                    Weight        w = (Weight)wIter.Current;
                    BooleanClause c = (BooleanClause)cIter.Current;
                    if (w.Scorer(reader, true, true) == null)
                    {
                        continue;
                    }
                    Explanation e = w.Explain(reader, doc);
                    if (!c.IsProhibited())
                    {
                        maxCoord++;
                    }
                    if (e.IsMatch())
                    {
                        if (!c.IsProhibited())
                        {
                            sumExpl.AddDetail(e);
                            sum += e.GetValue();
                            coord++;
                        }
                        else
                        {
                            Explanation r = new Explanation(0.0f, "match on prohibited clause (" + c.GetQuery().ToString() + ")");
                            r.AddDetail(e);
                            sumExpl.AddDetail(r);
                            fail = true;
                        }
                        if (c.GetOccur() == Occur.SHOULD)
                        {
                            shouldMatchCount++;
                        }
                    }
                    else if (c.IsRequired())
                    {
                        Explanation r = new Explanation(0.0f, "no match on required clause (" + c.GetQuery().ToString() + ")");
                        r.AddDetail(e);
                        sumExpl.AddDetail(r);
                        fail = true;
                    }
                }
                if (fail)
                {
                    System.Boolean tempAux = false;
                    sumExpl.SetMatch(tempAux);
                    sumExpl.SetValue(0.0f);
                    sumExpl.SetDescription("Failure to meet condition(s) of required/prohibited clause(s)");
                    return(sumExpl);
                }
                else if (shouldMatchCount < minShouldMatch)
                {
                    System.Boolean tempAux2 = false;
                    sumExpl.SetMatch(tempAux2);
                    sumExpl.SetValue(0.0f);
                    sumExpl.SetDescription("Failure to match minimum number " + "of optional clauses: " + minShouldMatch);
                    return(sumExpl);
                }

                sumExpl.SetMatch(0 < coord?true:false);
                sumExpl.SetValue(sum);

                float coordFactor = similarity.Coord(coord, maxCoord);

                if (coordFactor == 1.0f)
                {
                    // coord is no-op
                    return(sumExpl);
                }
                // eliminate wrapper
                else
                {
                    ComplexExplanation result = new ComplexExplanation(sumExpl.IsMatch(), sum * coordFactor, "product of:");
                    result.AddDetail(sumExpl);
                    result.AddDetail(new Explanation(coordFactor, "coord(" + coord + "/" + maxCoord + ")"));
                    return(result);
                }
            }
예제 #4
0
            public virtual Explanation Explain(IndexReader reader, int doc)
            {
                ComplexExplanation result = new ComplexExplanation();

                result.SetDescription("weight(" + GetQuery() + " in " + doc + "), product of:");

                Explanation idfExpl = new Explanation(idf, "idf(docFreq=" + reader.DocFreq(Enclosing_Instance.term) + ", numDocs=" + reader.NumDocs() + ")");

                // explain query weight
                Explanation queryExpl = new Explanation();

                queryExpl.SetDescription("queryWeight(" + GetQuery() + "), product of:");

                Explanation boostExpl = new Explanation(Enclosing_Instance.GetBoost(), "boost");

                if (Enclosing_Instance.GetBoost() != 1.0f)
                {
                    queryExpl.AddDetail(boostExpl);
                }
                queryExpl.AddDetail(idfExpl);

                Explanation queryNormExpl = new Explanation(queryNorm, "queryNorm");

                queryExpl.AddDetail(queryNormExpl);

                queryExpl.SetValue(boostExpl.GetValue() * idfExpl.GetValue() * queryNormExpl.GetValue());

                result.AddDetail(queryExpl);

                // explain field weight
                System.String      field     = Enclosing_Instance.term.Field();
                ComplexExplanation fieldExpl = new ComplexExplanation();

                fieldExpl.SetDescription("fieldWeight(" + Enclosing_Instance.term + " in " + doc + "), product of:");

                Explanation tfExpl = Scorer(reader).Explain(doc);

                fieldExpl.AddDetail(tfExpl);
                fieldExpl.AddDetail(idfExpl);

                Explanation fieldNormExpl = new Explanation();

                byte[] fieldNorms = reader.Norms(field);
                float  fieldNorm  = fieldNorms != null?Similarity.DecodeNorm(fieldNorms[doc]) : 0.0f;

                fieldNormExpl.SetValue(fieldNorm);
                fieldNormExpl.SetDescription("fieldNorm(field=" + field + ", doc=" + doc + ")");
                fieldExpl.AddDetail(fieldNormExpl);

                fieldExpl.SetMatch(tfExpl.IsMatch());
                fieldExpl.SetValue(tfExpl.GetValue() * idfExpl.GetValue() * fieldNormExpl.GetValue());

                result.AddDetail(fieldExpl);
                System.Boolean tempAux = fieldExpl.GetMatch();
                result.SetMatch(tempAux);

                // combine them
                result.SetValue(queryExpl.GetValue() * fieldExpl.GetValue());

                if (queryExpl.GetValue() == 1.0f)
                {
                    return(fieldExpl);
                }

                return(result);
            }
예제 #5
0
            public override Explanation Explain(IndexReader reader, int doc)
            {
                ComplexExplanation result = new ComplexExplanation();

                result.SetDescription("weight(" + GetQuery() + " in " + doc + "), product of:");

                Explanation idfExpl = new Explanation(idf, "idf(" + GetQuery() + ")");

                // explain query weight
                Explanation queryExpl = new Explanation();

                queryExpl.SetDescription("queryWeight(" + GetQuery() + "), product of:");

                Explanation boostExpl = new Explanation(Enclosing_Instance.GetBoost(), "boost");

                if (Enclosing_Instance.GetBoost() != 1.0f)
                {
                    queryExpl.AddDetail(boostExpl);
                }

                queryExpl.AddDetail(idfExpl);

                Explanation queryNormExpl = new Explanation(queryNorm, "queryNorm");

                queryExpl.AddDetail(queryNormExpl);

                queryExpl.SetValue(boostExpl.GetValue() * idfExpl.GetValue() * queryNormExpl.GetValue());

                result.AddDetail(queryExpl);

                // explain field weight
                ComplexExplanation fieldExpl = new ComplexExplanation();

                fieldExpl.SetDescription("fieldWeight(" + GetQuery() + " in " + doc + "), product of:");

                Scorer scorer = Scorer(reader, true, false);

                if (scorer == null)
                {
                    return(new Explanation(0.0f, "no matching docs"));
                }
                Explanation tfExpl = scorer.Explain(doc);

                fieldExpl.AddDetail(tfExpl);
                fieldExpl.AddDetail(idfExpl);

                Explanation fieldNormExpl = new Explanation();

                byte[] fieldNorms = reader.Norms(Enclosing_Instance.field);
                float  fieldNorm  = fieldNorms != null?Similarity.DecodeNorm(fieldNorms[doc]) : 1.0f;

                fieldNormExpl.SetValue(fieldNorm);
                fieldNormExpl.SetDescription("fieldNorm(field=" + Enclosing_Instance.field + ", doc=" + doc + ")");
                fieldExpl.AddDetail(fieldNormExpl);

                fieldExpl.SetMatch(tfExpl.IsMatch());
                fieldExpl.SetValue(tfExpl.GetValue() * idfExpl.GetValue() * fieldNormExpl.GetValue());

                result.AddDetail(fieldExpl);
                System.Boolean?tempAux = fieldExpl.GetMatch();
                result.SetMatch(tempAux);

                // combine them
                result.SetValue(queryExpl.GetValue() * fieldExpl.GetValue());

                if (queryExpl.GetValue() == 1.0f)
                {
                    return(fieldExpl);
                }

                return(result);
            }