Class LinearFloatFunction
- java.lang.Object
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- org.apache.lucene.queries.function.ValueSource
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- org.apache.lucene.queries.function.valuesource.LinearFloatFunction
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public class LinearFloatFunction extends ValueSource
LinearFloatFunctionimplements a linear function over anotherValueSource.
Normally Used as an argument to aFunctionQuery
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Field Summary
Fields Modifier and Type Field Description protected floatinterceptprotected floatslopeprotected ValueSourcesource
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Constructor Summary
Constructors Constructor Description LinearFloatFunction(ValueSource source, float slope, float intercept)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidcreateWeight(Map<Object,Object> context, IndexSearcher searcher)Implementations should propagate createWeight to sub-ValueSources which can optionally store weight info in the context.Stringdescription()description of field, used in explain()booleanequals(Object o)FunctionValuesgetValues(Map<Object,Object> context, LeafReaderContext readerContext)Gets the values for this reader and the context that was previously passed to createWeight().inthashCode()-
Methods inherited from class org.apache.lucene.queries.function.ValueSource
asDoubleValuesSource, asLongValuesSource, fromDoubleValuesSource, getSortField, newContext, toString
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Field Detail
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source
protected final ValueSource source
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slope
protected final float slope
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intercept
protected final float intercept
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Constructor Detail
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LinearFloatFunction
public LinearFloatFunction(ValueSource source, float slope, float intercept)
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Method Detail
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description
public String description()
Description copied from class:ValueSourcedescription of field, used in explain()- Specified by:
descriptionin classValueSource
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getValues
public FunctionValues getValues(Map<Object,Object> context, LeafReaderContext readerContext) throws IOException
Description copied from class:ValueSourceGets 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:
getValuesin classValueSource- Throws:
IOException
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createWeight
public void createWeight(Map<Object,Object> context, IndexSearcher searcher) throws IOException
Description copied from class:ValueSourceImplementations 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:
createWeightin classValueSource- Throws:
IOException
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hashCode
public int hashCode()
- Specified by:
hashCodein classValueSource
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equals
public boolean equals(Object o)
- Specified by:
equalsin classValueSource
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