Package org.apache.lucene.search.similarities

Class Similarity.SimScorer

java.lang.Object

org.apache.lucene.search.similarities.Similarity.SimScorer

Enclosing class:

Similarity

public abstract static class Similarity.SimScorer
extends Object

API for scoring "sloppy" queries such as TermQuery, SpanQuery, and PhraseQuery.

Constructor Summary

Constructors

Constructor	Description
SimScorer()	Sole constructor.

Method Summary

Modifier and Type	Method	Description
abstract float	computePayloadFactor(int doc, int start, int end, BytesRef payload)	Deprecated.
abstract float	computeSlopFactor(int distance)	Deprecated.
Explanation	explain(int doc, Explanation freq)	Explain the score for a single document
abstract float	score(int doc, float freq)	Score a single document

Methods inherited from class java.lang.Object

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

Constructor Detail

SimScorer

public SimScorer()

Sole constructor. (For invocation by subclass constructors, typically implicit.)

Method Detail

score

public abstract float score(int doc,
                            float freq)
                     throws IOException

Score a single document

Parameters:

doc - document id within the inverted index segment

freq - sloppy term frequency

Returns:

document's score

Throws:

IOException

computeSlopFactor

@Deprecated
public abstract float computeSlopFactor(int distance)

Deprecated.

Computes the amount of a sloppy phrase match, based on an edit distance.

computePayloadFactor

@Deprecated
public abstract float computePayloadFactor(int doc,
                                           int start,
                                           int end,
                                           BytesRef payload)

Deprecated.

Calculate a scoring factor based on the data in the payload.

explain

public Explanation explain(int doc,
                           Explanation freq)
                    throws IOException

Explain the score for a single document

Parameters:

doc - document id within the inverted index segment

freq - Explanation of how the sloppy term frequency was computed

Returns:

document's score

Throws:

IOException