org.apache.lucene.search

Class ReqOptSumScorer

public class ReqOptSumScorer extends Scorer

A Scorer for queries with a required part and an optional part. Delays skipTo() on the optional part until a score() is needed.
This Scorer implements Scorer.

Constructor Summary
	ReqOptSumScorer(Scorer reqScorer, Scorer optScorer) Construct a `ReqOptScorer`.

Method Summary
int	doc()
Explanation	explain(int doc) Explain the score of a document.
boolean	next()
float	score() Returns the score of the current document matching the query.
boolean	skipTo(int target)

Constructor Detail

ReqOptSumScorer

public ReqOptSumScorer(Scorer reqScorer, Scorer optScorer)

Construct a ReqOptScorer.

Parameters: reqScorer The required scorer. This must match. optScorer The optional scorer. This is used for scoring only.

Method Detail

doc

public int doc()

explain

public Explanation explain(int doc)

Explain the score of a document.

UNKNOWN: Also show the total score. See BooleanScorer.explain() on how to do this.

public boolean next()

score

public float score()

Returns the score of the current document matching the query. Initially invalid, until next is called the first time.

Returns: The score of the required scorer, eventually increased by the score of the optional scorer when it also matches the current document.