Beispiel #1
0
		public override Explanation Explain(IndexReader reader, int doc)
		{
			
			ComplexExplanation result = new ComplexExplanation();
			result.SetDescription("weight(" + GetQuery() + " in " + doc + "), product of:");
			System.String field = ((SpanQuery) GetQuery()).GetField();
			
			Explanation idfExpl = new Explanation(idf, "idf(" + field + ": " + idfExp.Explain() + ")");
			
			// explain query weight
			Explanation queryExpl = new Explanation();
			queryExpl.SetDescription("queryWeight(" + GetQuery() + "), product of:");
			
			Explanation boostExpl = new Explanation(GetQuery().GetBoost(), "boost");
			if (GetQuery().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(" + field + ":" + query.ToString(field) + " in " + doc + "), product of:");
			
			Explanation tfExpl = Scorer(reader, true, false).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]):1.0f;
			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;
		}
Beispiel #2
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		/// <summary>Returns an explanation of the score for a document.
		/// <br/>When this method is used, the {@link #Next()} method
		/// and the {@link #Score(HitCollector)} method should not be used.
		/// </summary>
		/// <param name="doc">The document number for the explanation.
		/// </param>
		public override Explanation Explain(int doc)
		{
			TermQuery query = (TermQuery) weight.GetQuery();
			Explanation tfExplanation = new Explanation();
			int tf = 0;
			while (pointer < pointerMax)
			{
				if (docs[pointer] == doc)
					tf = freqs[pointer];
				pointer++;
			}
			if (tf == 0)
			{
				if (termDocs.SkipTo(doc))
				{
					if (termDocs.Doc() == doc)
					{
						tf = termDocs.Freq();
					}
				}
			}
			termDocs.Close();
			tfExplanation.SetValue(GetSimilarity().Tf(tf));
			tfExplanation.SetDescription("tf(termFreq(" + query.GetTerm() + ")=" + tf + ")");
			
			return tfExplanation;
		}
Beispiel #3
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		/// <summary>Adds a sub-node to this explanation node. </summary>
		public virtual void  AddDetail(Explanation detail)
		{
			if (details == null)
				details = new System.Collections.ArrayList();
			details.Add(detail);
		}
Beispiel #4
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			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;
				}
			}
Beispiel #5
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			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;
			}
Beispiel #6
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			public override Explanation Explain(IndexReader ir, int i)
			{
				Explanation inner = weight.Explain(ir, i);
				if (Enclosing_Instance.GetBoost() != 1)
				{
					Explanation preBoost = inner;
					inner = new Explanation(inner.GetValue() * Enclosing_Instance.GetBoost(), "product of:");
					inner.AddDetail(new Explanation(Enclosing_Instance.GetBoost(), "boost"));
					inner.AddDetail(preBoost);
				}
				Filter f = Enclosing_Instance.filter;
				DocIdSet docIdSet = f.GetDocIdSet(ir);
				DocIdSetIterator docIdSetIterator = docIdSet == null?DocIdSet.EMPTY_DOCIDSET.Iterator():docIdSet.Iterator();
				if (docIdSetIterator == null)
				{
					docIdSetIterator = DocIdSet.EMPTY_DOCIDSET.Iterator();
				}
				if (docIdSetIterator.Advance(i) == i)
				{
					return inner;
				}
				else
				{
					Explanation result = new Explanation(0.0f, "failure to match filter: " + f.ToString());
					result.AddDetail(inner);
					return result;
				}
			}
Beispiel #7
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		public override Explanation Explain(int doc)
		{
			Explanation tfExplanation = new Explanation();
			
			int d = Advance(doc);
			float phraseFreq = (d == doc)?freq:0.0f;
			tfExplanation.SetValue(GetSimilarity().Tf(phraseFreq));
			tfExplanation.SetDescription("tf(phraseFreq=" + phraseFreq + ")");
			
			return tfExplanation;
		}
Beispiel #8
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			public override Explanation Explain(IndexReader reader, int doc)
			{
				
				Explanation result = new Explanation();
				result.SetDescription("weight(" + GetQuery() + " in " + doc + "), product of:");
				
				System.Text.StringBuilder docFreqs = new System.Text.StringBuilder();
				System.Text.StringBuilder query = new System.Text.StringBuilder();
				query.Append('\"');
				docFreqs.Append(idfExp.Explain());
				for (int i = 0; i < Enclosing_Instance.terms.Count; i++)
				{
					if (i != 0)
					{
						query.Append(" ");
					}
					
					Term term = (Term) Enclosing_Instance.terms[i];
					
					query.Append(term.Text());
				}
				query.Append('\"');
				
				Explanation idfExpl = new Explanation(idf, "idf(" + Enclosing_Instance.field + ":" + docFreqs + ")");
				
				// 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
				Explanation fieldExpl = new Explanation();
				fieldExpl.SetDescription("fieldWeight(" + Enclosing_Instance.field + ":" + query + " 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.SetValue(tfExpl.GetValue() * idfExpl.GetValue() * fieldNormExpl.GetValue());
				
				result.AddDetail(fieldExpl);
				
				// combine them
				result.SetValue(queryExpl.GetValue() * fieldExpl.GetValue());
				
				if (queryExpl.GetValue() == 1.0f)
					return fieldExpl;
				
				return result;
			}
Beispiel #9
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            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);
            }
Beispiel #10
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		/// <returns> An explanation for the score of a given document. 
		/// </returns>
		public override Explanation Explain(int doc)
		{
			Explanation res = new Explanation();
			System.Collections.IEnumerator ssi = subScorers.GetEnumerator();
			float sumScore = 0.0f;
			int nrMatches = 0;
			while (ssi.MoveNext())
			{
				Explanation es = ((Scorer) ssi.Current).Explain(doc);
				if (es.GetValue() > 0.0f)
				{
					// indicates match
					sumScore += es.GetValue();
					nrMatches++;
				}
				res.AddDetail(es);
			}
			if (nrMatchers >= minimumNrMatchers)
			{
				res.SetValue(sumScore);
				res.SetDescription("sum over at least " + minimumNrMatchers + " of " + subScorers.Count + ":");
			}
			else
			{
				res.SetValue(0.0f);
				res.SetDescription(nrMatches + " match(es) but at least " + minimumNrMatchers + " of " + subScorers.Count + " needed");
			}
			return res;
		}
Beispiel #11
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		/// <summary>Explain the score of a document.
		/// TODO: Also show the total score.
		/// See BooleanScorer.explain() on how to do this.
		/// </summary>
		public override Explanation Explain(int doc)
		{
			Explanation res = new Explanation();
			res.SetDescription("required, optional");
			res.AddDetail(reqScorer.Explain(doc));
			res.AddDetail(optScorer.Explain(doc));
			return res;
		}