Class DualFloatFunction
- java.lang.Object
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- org.apache.lucene.queries.function.ValueSource
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- org.apache.lucene.queries.function.valuesource.DualFloatFunction
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- Direct Known Subclasses:
DivFloatFunction
,PowFloatFunction
public abstract class DualFloatFunction extends ValueSource
AbstractValueSource
implementation which wraps two ValueSources and applies an extendible float function to their values.
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Field Summary
Fields Modifier and Type Field Description protected ValueSource
a
protected ValueSource
b
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Constructor Summary
Constructors Constructor Description DualFloatFunction(ValueSource a, ValueSource b)
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Method Summary
All Methods Instance Methods Abstract 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)
protected abstract float
func(int doc, FunctionValues aVals, FunctionValues bVals)
FunctionValues
getValues(Map context, LeafReaderContext readerContext)
Gets the values for this reader and the context that was previously passed to createWeight().int
hashCode()
protected abstract String
name()
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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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a
protected final ValueSource a
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b
protected final ValueSource b
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Constructor Detail
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DualFloatFunction
public DualFloatFunction(ValueSource a, ValueSource b)
- Parameters:
a
- the base.b
- the exponent.
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Method Detail
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name
protected abstract String 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
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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