Package org.apache.lucene.search

Class MultiNormsLeafSimScorer

java.lang.Object

org.apache.lucene.search.MultiNormsLeafSimScorer

final class MultiNormsLeafSimScorer
extends java.lang.Object

Copy of LeafSimScorer that sums document's norms from multiple fields.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	MultiNormsLeafSimScorer.MultiFieldNormValues

Field Summary

Fields

Modifier and Type	Field	Description
private static float[]	LENGTH_TABLE	Cache of decoded norms.
private NumericDocValues	norms
private Similarity.SimScorer	scorer

Constructor Summary

Constructors

Constructor	Description
MultiNormsLeafSimScorer(Similarity.SimScorer scorer, LeafReader reader, java.util.Collection<BM25FQuery.FieldAndWeight> normFields, boolean needsScores)	Sole constructor: Score documents of reader with scorer.

Method Summary

Modifier and Type	Method	Description
Explanation	explain(int doc, Explanation freqExpl)	Explain the score for the provided document assuming the given term document frequency.
private long	getNormValue(int doc)
float	score(int doc, float freq)	Score the provided document assuming the given term document frequency.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LENGTH_TABLE

private static final float[] LENGTH_TABLE

Cache of decoded norms.

scorer

private final Similarity.SimScorer scorer

norms

private final NumericDocValues norms

Constructor Detail

MultiNormsLeafSimScorer

MultiNormsLeafSimScorer(Similarity.SimScorer scorer,
                        LeafReader reader,
                        java.util.Collection<BM25FQuery.FieldAndWeight> normFields,
                        boolean needsScores)
                 throws java.io.IOException

Sole constructor: Score documents of reader with scorer.

Throws:

java.io.IOException

Method Detail

getNormValue

private long getNormValue(int doc)
                   throws java.io.IOException

Throws:

java.io.IOException

score

public float score(int doc,
                   float freq)
            throws java.io.IOException

Score the provided document assuming the given term document frequency. This method must be called on non-decreasing sequences of doc ids.

Throws:

java.io.IOException

See Also:

Similarity.SimScorer.score(float, long)

explain

public Explanation explain(int doc,
                           Explanation freqExpl)
                    throws java.io.IOException

Explain the score for the provided document assuming the given term document frequency. This method must be called on non-decreasing sequences of doc ids.

Throws:

java.io.IOException

See Also:

Similarity.SimScorer.explain(Explanation, long)