Пример #1
0
                public override Explanation Explain(int doc)
                {
                    ComplexExplanation result         = new ComplexExplanation();
                    Explanation        nonPayloadExpl = base.Explain(doc);

                    result.AddDetail(nonPayloadExpl);
                    //QUESTION: Is there a wau to avoid this skipTo call?  We need to know whether to load the payload or not

                    Explanation payloadBoost = new Explanation();

                    result.AddDetail(payloadBoost);

                    /*
                     * if (skipTo(doc) == true) {
                     * processPayload();
                     * }*/

                    float avgPayloadScore = (payloadsSeen > 0 ? (payloadScore / payloadsSeen) : 1);

                    payloadBoost.SetValue(avgPayloadScore);
                    //GSI: I suppose we could toString the payload, but I don't think that would be a good idea
                    payloadBoost.SetDescription("scorePayload(...)");
                    result.SetValue(nonPayloadExpl.GetValue() * avgPayloadScore);
                    result.SetDescription("btq, product of:");
                    result.SetMatch(nonPayloadExpl.GetValue() == 0 ? false : true); // LUCENE-1303
                    return(result);
                }
Пример #2
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);
        }
Пример #3
0
        public virtual Explanation Explain(IndexReader reader, int doc)
        {
            ComplexExplanation result = new ComplexExplanation();

            result.SetDescription("weight(" + GetQuery() + " in " + doc + "), product of:");
            System.String field = ((SpanQuery)GetQuery()).GetField();

            System.Text.StringBuilder      docFreqs = new System.Text.StringBuilder();
            System.Collections.IEnumerator i        = terms.GetEnumerator();
            while (i.MoveNext())
            {
                System.Collections.DictionaryEntry tmp = (System.Collections.DictionaryEntry)i.Current;
                Term term = (Term)tmp.Key;
                docFreqs.Append(term.Text());
                docFreqs.Append("=");
                docFreqs.Append(reader.DocFreq(term));

                if (i.MoveNext())
                {
                    docFreqs.Append(" ");
                }
            }

            Explanation idfExpl = new Explanation(idf, "idf(" + field + ": " + docFreqs + ")");

            // 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).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);
        }