org.apache.solr.ltr.norm

Class MinMaxNormalizer

java.lang.Object

org.apache.solr.ltr.norm.Normalizer

org.apache.solr.ltr.norm.MinMaxNormalizer

public class MinMaxNormalizer
extends Normalizer

A Normalizer to scale a feature value using a (min,max) range.

Example configuration:

"norm" : {
    "class" : "org.apache.solr.ltr.norm.MinMaxNormalizer",
    "params" : { "min":"0", "max":"50" }
}

Example normalizations:

• -5 will be normalized to -0.1
• 55 will be normalized to 1.1
• +5 will be normalized to +0.1

Constructor Summary

Constructors

Constructor and Description
MinMaxNormalizer()

Method Summary

Modifier and Type	Method and Description
float	getMax()
float	getMin()
float	normalize(float value)
LinkedHashMap<String,Object>	paramsToMap()
void	setMax(float max)
void	setMax(String max)
void	setMin(float min)
void	setMin(String min)
String	toString()
protected void	validate() As part of creation of a normalizer instance, this function confirms that the normalizer parameters are valid.

Methods inherited from class org.apache.solr.ltr.norm.Normalizer

explain, getInstance

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MinMaxNormalizer

public MinMaxNormalizer()

Method Detail

getMin

public float getMin()

setMin

public void setMin(float min)

setMin

public void setMin(String min)

getMax

public float getMax()

setMax

public void setMax(float max)

setMax

public void setMax(String max)

validate

protected void validate()
                 throws NormalizerException

Description copied from class: Normalizer

As part of creation of a normalizer instance, this function confirms that the normalizer parameters are valid.

Specified by:

validate in class Normalizer

Throws:

NormalizerException - Normalizer Exception

normalize

public float normalize(float value)

Specified by:

normalize in class Normalizer

paramsToMap

public LinkedHashMap<String,Object> paramsToMap()

Specified by:

paramsToMap in class Normalizer

toString

public String toString()

Overrides:

toString in class Object