Class ScoringRewrite<Q>

Base rewrite method that translates each term into a query, and keeps the scores as computed by the query.

Note

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

  • Only public to be accessible by spans package.
Inheritance
System.Object
MultiTermQuery.RewriteMethod
TermCollectingRewrite<Q>
ScoringRewrite<Q>
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: Lucene.Net.Search
Assembly: Lucene.Net.dll
Syntax
public abstract class ScoringRewrite<Q> : TermCollectingRewrite<Q> where Q : Query
Type Parameters
Name Description
Q

Fields

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CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE

Like SCORING_BOOLEAN_QUERY_REWRITE except scores are not computed. Instead, each matching document receives a constant score equal to the query's boost.

NOTE: this rewrite method will hit BooleanQuery.TooManyClausesException if the number of terms exceeds MaxClauseCount.

Declaration
public static readonly MultiTermQuery.RewriteMethod CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE
Field Value
Type Description
MultiTermQuery.RewriteMethod
See Also
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SCORING_BOOLEAN_QUERY_REWRITE

A rewrite method that first translates each term into SHOULD clause in a BooleanQuery, and keeps the scores as computed by the query. Note that typically such scores are meaningless to the user, and require non-trivial CPU to compute, so it's almost always better to use CONSTANT_SCORE_AUTO_REWRITE_DEFAULT instead.

NOTE: this rewrite method will hit BooleanQuery.TooManyClausesException if the number of terms exceeds MaxClauseCount.

Declaration
public static readonly ScoringRewrite<BooleanQuery> SCORING_BOOLEAN_QUERY_REWRITE
Field Value
Type Description
ScoringRewrite<BooleanQuery>
See Also

Methods

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CheckMaxClauseCount(Int32)

This method is called after every new term to check if the number of max clauses (e.g. in BooleanQuery) is not exceeded. Throws the corresponding System.Exception.

Declaration
protected abstract void CheckMaxClauseCount(int count)
Parameters
Type Name Description
System.Int32 count
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Rewrite(IndexReader, MultiTermQuery)

Declaration
public override Query Rewrite(IndexReader reader, MultiTermQuery query)
Parameters
Type Name Description
IndexReader reader
MultiTermQuery query
Returns
Type Description
Query
Overrides