Class DualFloatFunction
java.lang.Object
org.apache.lucene.queries.function.ValueSource
org.apache.lucene.queries.function.valuesource.DualFloatFunction
- Direct Known Subclasses:
DivFloatFunction
,PowFloatFunction
Abstract
ValueSource
implementation which wraps two ValueSources and applies an
extendible float function to their values.-
Field Summary
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionvoid
createWeight
(Map<Object, Object> context, IndexSearcher searcher) Implementations should propagate createWeight to sub-ValueSources which can optionally store weight info in the context.description of field, used in explain()boolean
protected abstract float
func
(int doc, FunctionValues aVals, FunctionValues bVals) getValues
(Map<Object, Object> context, LeafReaderContext readerContext) Gets the values for this reader and the context that was previously passed to createWeight().int
hashCode()
protected abstract String
name()
Methods inherited from class org.apache.lucene.queries.function.ValueSource
asDoubleValuesSource, asLongValuesSource, fromDoubleValuesSource, getSortField, newContext, toString
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Field Details
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a
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b
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Constructor Details
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DualFloatFunction
- Parameters:
a
- the base.b
- the exponent.
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Method Details
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name
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func
protected abstract float func(int doc, FunctionValues aVals, FunctionValues bVals) throws IOException - Throws:
IOException
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description
Description copied from class:ValueSource
description of field, used in explain()- Specified by:
description
in classValueSource
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getValues
public FunctionValues getValues(Map<Object, Object> context, 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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createWeight
Description copied from class:ValueSource
Implementations should propagate createWeight to sub-ValueSources which can optionally store weight info in the context. The context object will be passed to getValues() where this info can be retrieved.- Overrides:
createWeight
in classValueSource
- Throws:
IOException
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hashCode
public int hashCode()- Specified by:
hashCode
in classValueSource
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equals
- Specified by:
equals
in classValueSource
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