Class ScoreCachingWrappingScorer

A Scorer which wraps another scorer and caches the score of the current document. Successive calls to GetScore() will return the same result and will not invoke the wrapped Scorer's GetScore() method, unless the current document has changed.

This class might be useful due to the changes done to the ICollector interface, in which the score is not computed for a document by default, only if the collector requests it. Some collectors may need to use the score in several places, however all they have in hand is a Scorer object, and might end up computing the score of a document more than once.

Inheritance
System.Object
DocIdSetIterator
DocsEnum
Scorer
ScoreCachingWrappingScorer
Inherited Members
Namespace: Lucene.Net.Search
Assembly: Lucene.Net.dll
Syntax
public class ScoreCachingWrappingScorer : Scorer

Constructors

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ScoreCachingWrappingScorer(Scorer)

Creates a new instance by wrapping the given scorer.

Declaration
public ScoreCachingWrappingScorer(Scorer scorer)
Parameters
Type Name Description
Scorer scorer

Properties

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DocID

Declaration
public override int DocID { get; }
Property Value
Type Description
System.Int32
Overrides
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Freq

Declaration
public override int Freq { get; }
Property Value
Type Description
System.Int32
Overrides

Methods

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Advance(Int32)

Declaration
public override int Advance(int target)
Parameters
Type Name Description
System.Int32 target
Returns
Type Description
System.Int32
Overrides
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GetChildren()

Declaration
public override ICollection<Scorer.ChildScorer> GetChildren()
Returns
Type Description
ICollection<Scorer.ChildScorer>
Overrides
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GetCost()

Declaration
public override long GetCost()
Returns
Type Description
System.Int64
Overrides
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GetScore()

Declaration
public override float GetScore()
Returns
Type Description
System.Single
Overrides
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NextDoc()

Declaration
public override int NextDoc()
Returns
Type Description
System.Int32
Overrides