Class ConstantScoreQuery

A query that wraps another query or a filter and simply returns a constant score equal to the query boost for every document that matches the filter or query. For queries it therefore simply strips of all scores and returns a constant one.

Inheritance
System.Object
Query
ConstantScoreQuery
Inherited Members
System.Object.Equals(System.Object, System.Object)
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: Lucene.Net.Search
Assembly: Lucene.Net.dll
Syntax
public class ConstantScoreQuery : Query

Constructors

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ConstantScoreQuery(Filter)

Wraps a Filter as a Query. The hits will get a constant score dependent on the boost factor of this query. If you simply want to strip off scores from a Query, no longer use new ConstantScoreQuery(new QueryWrapperFilter(query)), instead use ConstantScoreQuery(Query)!

Declaration
public ConstantScoreQuery(Filter filter)
Parameters
Type Name Description
Filter filter
Exceptions
Type Condition
System.ArgumentNullException

if filter is null.
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ConstantScoreQuery(Query)

Strips off scores from the passed in Query. The hits will get a constant score dependent on the boost factor of this query.

Declaration
public ConstantScoreQuery(Query query)
Parameters
Type Name Description
Query query
Exceptions
Type Condition
System.ArgumentNullException

if query is null.

Fields

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m_filter

Declaration
protected readonly Filter m_filter
Field Value
Type Description
Filter
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m_query

Declaration
protected readonly Query m_query
Field Value
Type Description
Query

Properties

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Filter

Returns the encapsulated filter, returns null if a query is wrapped.

Declaration
public virtual Filter Filter { get; }
Property Value
Type Description
Filter
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Query

Returns the encapsulated query, returns null if a filter is wrapped.

Declaration
public virtual Query Query { get; }
Property Value
Type Description
Query

Methods

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CreateWeight(IndexSearcher)

Declaration
public override Weight CreateWeight(IndexSearcher searcher)
Parameters
Type Name Description
IndexSearcher searcher
Returns
Type Description
Weight
Overrides
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Equals(Object)

Declaration
public override bool Equals(object o)
Parameters
Type Name Description
System.Object o
Returns
Type Description
System.Boolean
Overrides
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ExtractTerms(ISet<Term>)

Declaration
public override void ExtractTerms(ISet<Term> terms)
Parameters
Type Name Description
System.Collections.Generic.ISet<Term> terms
Overrides
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GetHashCode()

Declaration
public override int GetHashCode()
Returns
Type Description
System.Int32
Overrides
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Rewrite(IndexReader)

Declaration
public override Query Rewrite(IndexReader reader)
Parameters
Type Name Description
IndexReader reader
Returns
Type Description
Query
Overrides
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ToString(String)

Declaration
public override string ToString(string field)
Parameters
Type Name Description
System.String field
Returns
Type Description
System.String
Overrides