Module org.apache.lucene.core

Package org.apache.lucene.search

Class DisjunctionSumScorer

java.lang.Object

org.apache.lucene.search.Scorable

org.apache.lucene.search.Scorer

org.apache.lucene.search.DisjunctionScorer

org.apache.lucene.search.DisjunctionSumScorer

final class DisjunctionSumScorer
extends DisjunctionScorer

A Scorer for OR like queries, counterpart of ConjunctionScorer.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.search.Scorable

Scorable.ChildScorable

Field Summary

Fields

Modifier and Type	Field	Description
private final List<Scorer>	scorers

Fields inherited from class org.apache.lucene.search.Scorer

weight

Constructor Summary

Constructors

Constructor	Description
DisjunctionSumScorer(Weight weight, List<Scorer> subScorers, ScoreMode scoreMode)	Construct a DisjunctionScorer.

Method Summary

Modifier and Type	Method	Description
int	advanceShallow(int target)	Advance to the block of documents that contains target in order to get scoring information about this block.
float	getMaxScore(int upTo)	Return the maximum score that documents between the last target that this iterator was shallow-advanced to included and upTo included.
protected float	score(DisiWrapper topList)	Compute the score for the given linked list of scorers.

Methods inherited from class org.apache.lucene.search.DisjunctionScorer

docID, getChildren, getSubMatches, iterator, score, twoPhaseIterator

Methods inherited from class org.apache.lucene.search.Scorer

getWeight

Methods inherited from class org.apache.lucene.search.Scorable

setMinCompetitiveScore, smoothingScore

Methods inherited from class java.lang.Object

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

Field Details

scorers

private final List<Scorer> scorers

Constructor Details

DisjunctionSumScorer

DisjunctionSumScorer(Weight weight,
 List<Scorer> subScorers,
 ScoreMode scoreMode)
              throws IOException

Construct a DisjunctionScorer.

Parameters:

weight - The weight to be used.

subScorers - Array of at least two subscorers.

Throws:

IOException

Method Details

score

protected float score(DisiWrapper topList)
               throws IOException

Description copied from class: DisjunctionScorer

Compute the score for the given linked list of scorers.

Specified by:

score in class DisjunctionScorer

Throws:

IOException

advanceShallow

public int advanceShallow(int target)
                   throws IOException

Description copied from class: Scorer

Advance to the block of documents that contains target in order to get scoring information about this block. This method is implicitly called by DocIdSetIterator.advance(int) and DocIdSetIterator.nextDoc() on the returned doc ID. Calling this method doesn't modify the current DocIdSetIterator.docID(). It returns a number that is greater than or equal to all documents contained in the current block, but less than any doc IDS of the next block. target must be >= Scorable.docID() as well as all targets that have been passed to Scorer.advanceShallow(int) so far.

Overrides:

advanceShallow in class Scorer

Throws:

IOException

getMaxScore

public float getMaxScore(int upTo)
                  throws IOException

Description copied from class: Scorer

Return the maximum score that documents between the last target that this iterator was shallow-advanced to included and upTo included.

Specified by:

getMaxScore in class Scorer

Throws:

IOException