Package org.apache.lucene.search

Class MaxScoreCache

java.lang.Object

org.apache.lucene.search.MaxScoreCache

public final class MaxScoreCache
extends Object

Compute maximum scores based on Impacts and keep them in a cache in order not to run expensive similarity score computations multiple times on the same data.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Constructor Summary

Constructors

Constructor	Description
MaxScoreCache(ImpactsSource impactsSource, Similarity.SimScorer scorer)	Sole constructor.

Method Summary

Modifier and Type	Method	Description
int	advanceShallow(int target)	Implement the contract of Scorer.advanceShallow(int) based on the wrapped ImpactsSource.
float	getMaxScore(int upTo)	Return the maximum score up to upTo included.

Methods inherited from class java.lang.Object

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

Constructor Details

MaxScoreCache

public MaxScoreCache(ImpactsSource impactsSource,
 Similarity.SimScorer scorer)

Sole constructor.

Method Details

advanceShallow

public int advanceShallow(int target)
                   throws IOException

Implement the contract of Scorer.advanceShallow(int) based on the wrapped ImpactsSource.

Throws:

IOException

See Also:

• Scorer.advanceShallow(int)

getMaxScore

public float getMaxScore(int upTo)
                  throws IOException

Return the maximum score up to upTo included.

Throws:

IOException

See Also:

• Scorer.getMaxScore(int)