Package org.apache.lucene.queries.function.valuesource

Class RangeMapFloatFunction

java.lang.Object

org.apache.lucene.queries.function.ValueSource

org.apache.lucene.queries.function.valuesource.RangeMapFloatFunction

public class RangeMapFloatFunction
extends ValueSource

RangeMapFloatFunction implements a map function over another ValueSource whose values fall within min and max inclusive to target.
Normally Used as an argument to a FunctionQuery

Field Summary

Fields

Modifier and Type	Field	Description
protected final ValueSource	defaultVal
protected final float	max
protected final float	min
protected final ValueSource	source
protected final ValueSource	target

Constructor Summary

Constructors

Constructor	Description
RangeMapFloatFunction(ValueSource source, float min, float max, float target, Float def)
RangeMapFloatFunction(ValueSource source, float min, float max, ValueSource target, ValueSource def)

Method Summary

Modifier and Type	Method	Description
void	createWeight(Map<Object,Object> 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<Object,Object> context, LeafReaderContext readerContext)	Gets the values for this reader and the context that was previously passed to createWeight().
int	hashCode()

Methods inherited from class org.apache.lucene.queries.function.ValueSource

asDoubleValuesSource, asLongValuesSource, fromDoubleValuesSource, getSortField, newContext, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

source

protected final ValueSource source

min

protected final float min

max

protected final float max

target

protected final ValueSource target

defaultVal

protected final ValueSource defaultVal

Constructor Details

RangeMapFloatFunction

public RangeMapFloatFunction(ValueSource source,
 float min,
 float max,
 float target,
 Float def)

RangeMapFloatFunction

public RangeMapFloatFunction(ValueSource source,
 float min,
 float max,
 ValueSource target,
 ValueSource def)

Method Details

description

public String description()

Description copied from class: ValueSource

description of field, used in explain()

Specified by:

description in class ValueSource

getValues

public FunctionValues getValues(Map<Object,Object> 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 class ValueSource

Throws:

IOException

createWeight

public void createWeight(Map<Object,Object> 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 class ValueSource

Throws:

IOException

hashCode

public int hashCode()

Specified by:

hashCode in class ValueSource

equals

public boolean equals(Object o)

Specified by:

equals in class ValueSource