示例#1
0
			public virtual Explanation Explain(Monodoc.Lucene.Net.Index.IndexReader reader, int doc)
			{
				Explanation sumExpl = new Explanation();
				sumExpl.SetDescription("sum of:");
				int coord = 0;
				int maxCoord = 0;
				float sum = 0.0f;
				for (int i = 0; i < weights.Count; i++)
				{
					BooleanClause c = (BooleanClause) Enclosing_Instance.clauses[i];
					Weight w = (Weight) weights[i];
					Explanation e = w.Explain(reader, doc);
					if (!c.prohibited)
						maxCoord++;
					if (e.GetValue() > 0)
					{
						if (!c.prohibited)
						{
							sumExpl.AddDetail(e);
							sum += e.GetValue();
							coord++;
						}
						else
						{
							return new Explanation(0.0f, "match prohibited");
						}
					}
					else if (c.required)
					{
						return new Explanation(0.0f, "match required");
					}
				}
				sumExpl.SetValue(sum);
				
				if (coord == 1)
				// only one clause matched
					sumExpl = sumExpl.GetDetails()[0]; // eliminate wrapper
				
				float coordFactor = Enclosing_Instance.GetSimilarity(searcher).Coord(coord, maxCoord);
				if (coordFactor == 1.0f)
				// coord is no-op
					return sumExpl;
				// eliminate wrapper
				else
				{
					Explanation result = new Explanation();
					result.SetDescription("product of:");
					result.AddDetail(sumExpl);
					result.AddDetail(new Explanation(coordFactor, "coord(" + coord + "/" + maxCoord + ")"));
					result.SetValue(sum * coordFactor);
					return result;
				}
			}
			public virtual Explanation Explain(Monodoc.Lucene.Net.Index.IndexReader reader, int doc)
			{
				Explanation result = new Explanation();
				result.SetDescription("weight(" + Query + " in " + doc + "), product of:");
				
				Explanation idfExpl = new Explanation(idf, "idf(" + Query + ")");
				
				// explain query weight
				Explanation queryExpl = new Explanation();
				queryExpl.SetDescription("queryWeight(" + Query + "), 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(" + Query + " in " + doc + "), product of:");
				
				Explanation tfExpl = Scorer(reader).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]):0.0f;
				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;
			}
            public virtual Explanation Explain(Monodoc.Lucene.Net.Index.IndexReader reader, int doc)
            {
                Explanation result = new Explanation();

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

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

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

                queryExpl.SetDescription("queryWeight(" + Query + "), 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(" + Query + " in " + doc + "), product of:");

                Explanation tfExpl = Scorer(reader).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]) : 0.0f;

                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);
            }
			public virtual Explanation Explain(Monodoc.Lucene.Net.Index.IndexReader reader, int doc)
			{
				
				Explanation result = new Explanation();
				result.SetDescription("weight(" + Query + " in " + doc + "), product of:");
				
				System.Text.StringBuilder docFreqs = new System.Text.StringBuilder();
				System.Text.StringBuilder query = new System.Text.StringBuilder();
				query.Append('\"');
				for (int i = 0; i < Enclosing_Instance.terms.Count; i++)
				{
					if (i != 0)
					{
						docFreqs.Append(" ");
						query.Append(" ");
					}
					
					Term term = (Term) Enclosing_Instance.terms[i];
					
					docFreqs.Append(term.Text());
					docFreqs.Append("=");
					docFreqs.Append(searcher.DocFreq(term));
					
					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(" + Query + "), 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:");
				
				Explanation tfExpl = Scorer(reader).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]):0.0f;
				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;
			}
示例#5
0
            public virtual Explanation Explain(Monodoc.Lucene.Net.Index.IndexReader reader, int doc)
            {
                Explanation sumExpl = new Explanation();

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

                for (int i = 0; i < weights.Count; i++)
                {
                    BooleanClause c = (BooleanClause)Enclosing_Instance.clauses[i];
                    Weight        w = (Weight)weights[i];
                    Explanation   e = w.Explain(reader, doc);
                    if (!c.prohibited)
                    {
                        maxCoord++;
                    }
                    if (e.GetValue() > 0)
                    {
                        if (!c.prohibited)
                        {
                            sumExpl.AddDetail(e);
                            sum += e.GetValue();
                            coord++;
                        }
                        else
                        {
                            return(new Explanation(0.0f, "match prohibited"));
                        }
                    }
                    else if (c.required)
                    {
                        return(new Explanation(0.0f, "match required"));
                    }
                }
                sumExpl.SetValue(sum);

                if (coord == 1)
                {
                    // only one clause matched
                    sumExpl = sumExpl.GetDetails()[0];                     // eliminate wrapper
                }
                float coordFactor = Enclosing_Instance.GetSimilarity(searcher).Coord(coord, maxCoord);

                if (coordFactor == 1.0f)
                {
                    // coord is no-op
                    return(sumExpl);
                }
                // eliminate wrapper
                else
                {
                    Explanation result = new Explanation();
                    result.SetDescription("product of:");
                    result.AddDetail(sumExpl);
                    result.AddDetail(new Explanation(coordFactor, "coord(" + coord + "/" + maxCoord + ")"));
                    result.SetValue(sum * coordFactor);
                    return(result);
                }
            }