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
LinearFloatFunction
implements a linear function over anotherValueSource
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Normally Used as an argument to aFunctionQuery
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Field Summary
Fields Modifier and Type Field Description protected float
intercept
protected float
slope
protected ValueSource
source
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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 void
createWeight(Map context, IndexSearcher searcher)
Implementations should propagate createWeight to sub-ValueSources which can optionally store weight info in the context.String
description()
description of field, used in explain()boolean
equals(Object o)
FunctionValues
getValues(Map context, LeafReaderContext readerContext)
Gets the values for this reader and the context that was previously passed to createWeight().int
hashCode()
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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:ValueSource
description of field, used in explain()- Specified by:
description
in classValueSource
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getValues
public FunctionValues getValues(Map context, LeafReaderContext readerContext) throws IOException
Description 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
public void createWeight(Map context, IndexSearcher searcher) throws IOException
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
public boolean equals(Object o)
- Specified by:
equals
in classValueSource
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