Class DefFunction

ValueSource implementation which only returns the values from the provided ValueSources which are available for a particular docId. Consequently, when combined with a ConstValueSource, this function serves as a way to return a default value when the values for a field are unavailable.

Inheritance
System.Object
ValueSource
MultiFunction
DefFunction
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.Queries.Function.ValueSources
Assembly: Lucene.Net.Queries.dll
Syntax
public class DefFunction : MultiFunction

Constructors

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DefFunction(IList<ValueSource>)

Declaration
public DefFunction(IList<ValueSource> sources)
Parameters
Type Name Description
System.Collections.Generic.IList<ValueSource> sources

Properties

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Name

Declaration
protected override string Name { get; }
Property Value
Type Description
System.String
Overrides

Methods

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GetValues(IDictionary, AtomicReaderContext)

Declaration
public override FunctionValues GetValues(IDictionary fcontext, AtomicReaderContext readerContext)
Parameters
Type Name Description
System.Collections.IDictionary fcontext
Lucene.Net.Index.AtomicReaderContext readerContext
Returns
Type Description
FunctionValues
Overrides