Examples with Explanation org.apache.lucene.search.Explanation used on opensource projects

Example 61 with Explanation

use of org.apache.lucene.search.Explanation in project lucene-solr by apache.

the class DFRSimilarity method explain.

@Override
protected void explain(List<Explanation> subs, BasicStats stats, int doc, float freq, float docLen) {
    if (stats.getBoost() != 1.0f) {
        subs.add(Explanation.match(stats.getBoost(), "boost"));
    }
    Explanation normExpl = normalization.explain(stats, freq, docLen);
    float tfn = normExpl.getValue();
    subs.add(normExpl);
    subs.add(basicModel.explain(stats, tfn));
    subs.add(afterEffect.explain(stats, tfn));
}

Example 62 with Explanation

use of org.apache.lucene.search.Explanation in project lucene-solr by apache.

the class LMDirichletSimilarity method explain.

@Override
protected void explain(List<Explanation> subs, BasicStats stats, int doc, float freq, float docLen) {
    if (stats.getBoost() != 1.0f) {
        subs.add(Explanation.match(stats.getBoost(), "boost"));
    }
    subs.add(Explanation.match(mu, "mu"));
    Explanation weightExpl = Explanation.match((float) Math.log(1 + freq / (mu * ((LMStats) stats).getCollectionProbability())), "term weight");
    subs.add(weightExpl);
    subs.add(Explanation.match((float) Math.log(mu / (docLen + mu)), "document norm"));
    super.explain(subs, stats, doc, freq, docLen);
}

Example 63 with Explanation

use of org.apache.lucene.search.Explanation in project lucene-solr by apache.

the class TFIDFSimilarity method computeWeight.

@Override
public final SimWeight computeWeight(float boost, CollectionStatistics collectionStats, TermStatistics... termStats) {
    final Explanation idf = termStats.length == 1 ? idfExplain(collectionStats, termStats[0]) : idfExplain(collectionStats, termStats);
    float[] normTable = new float[256];
    for (int i = 1; i < 256; ++i) {
        int length = SmallFloat.byte4ToInt((byte) i);
        float norm = lengthNorm(length);
        normTable[i] = norm;
    }
    normTable[0] = 1f / normTable[255];
    return new IDFStats(collectionStats.field(), boost, idf, normTable);
}

Example 64 with Explanation

use of org.apache.lucene.search.Explanation in project lucene-solr by apache.

the class TFIDFSimilarity method explainField.

private Explanation explainField(int doc, Explanation freq, IDFStats stats, NumericDocValues norms, float[] normTable) throws IOException {
    Explanation tfExplanation = Explanation.match(tf(freq.getValue()), "tf(freq=" + freq.getValue() + "), with freq of:", freq);
    float norm;
    if (norms == null) {
        norm = 1f;
    } else if (norms.advanceExact(doc) == false) {
        norm = 0f;
    } else {
        norm = normTable[(int) (norms.longValue() & 0xFF)];
    }
    Explanation fieldNormExpl = Explanation.match(norm, "fieldNorm(doc=" + doc + ")");
    return Explanation.match(tfExplanation.getValue() * stats.idf.getValue() * fieldNormExpl.getValue(), "fieldWeight in " + doc + ", product of:", tfExplanation, stats.idf, fieldNormExpl);
}

Example 65 with Explanation

use of org.apache.lucene.search.Explanation in project lucene-solr by apache.

the class TFIDFSimilarity method explainScore.

private Explanation explainScore(int doc, Explanation freq, IDFStats stats, NumericDocValues norms, float[] normTable) throws IOException {
    Explanation queryExpl = Explanation.match(stats.boost, "boost");
    Explanation fieldExpl = explainField(doc, freq, stats, norms, normTable);
    if (stats.boost == 1f) {
        return fieldExpl;
    }
    return Explanation.match(queryExpl.getValue() * fieldExpl.getValue(), "score(doc=" + doc + ",freq=" + freq.getValue() + "), product of:", queryExpl, fieldExpl);
}