Class DefFunction
java.lang.Object
org.apache.lucene.queries.function.ValueSource
org.apache.lucene.queries.function.valuesource.MultiFunction
org.apache.lucene.queries.function.valuesource.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.-
Nested Class Summary
Nested classes/interfaces inherited from class org.apache.lucene.queries.function.valuesource.MultiFunction
MultiFunction.Values
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Field Summary
Fields inherited from class org.apache.lucene.queries.function.valuesource.MultiFunction
sources
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Constructor Summary
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Method Summary
Methods inherited from class org.apache.lucene.queries.function.valuesource.MultiFunction
allExists, allExists, anyExists, anyExists, createWeight, description, description, equals, hashCode, toString, valsArr
Methods inherited from class org.apache.lucene.queries.function.ValueSource
asDoubleValuesSource, asLongValuesSource, fromDoubleValuesSource, getSortField, newContext, toString
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Constructor Details
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DefFunction
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Method Details
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name
- Specified by:
name
in classMultiFunction
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getValues
public FunctionValues getValues(Map<Object, Object> fcontext, LeafReaderContext readerContext) throws IOExceptionDescription copied from class:ValueSource
Gets the values for this reader and the context that was previously passed to createWeight(). The values must be consumed in a forward docID manner, and you must call this method again to iterate through the values again.- Specified by:
getValues
in classValueSource
- Throws:
IOException
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