org.apache.solr.handler.component

Class NumericStatsValues

java.lang.Object

org.apache.solr.handler.component.AbstractStatsValues<java.lang.Number>

org.apache.solr.handler.component.NumericStatsValues

All Implemented Interfaces:

StatsValues

class NumericStatsValues
extends AbstractStatsValues<java.lang.Number>

Implementation of StatsValues that supports Double values

Field Summary

Fields

Modifier and Type	Field and Description
(package private) double	sum
(package private) double	sumOfSquares

Fields inherited from class org.apache.solr.handler.component.AbstractStatsValues

count, facets, fieldType, max, min, missing

Constructor Summary

Constructors

Constructor and Description
NumericStatsValues(FieldType fieldType)

Method Summary

Modifier and Type	Method and Description
protected void	addTypeSpecificStats(NamedList<java.lang.Object> res) Adds sum, sumOfSquares, mean and standard deviation statistics to the given NamedList
private double	getStandardDeviation() Calculates the standard deviation statistic
protected java.lang.Double	toTypedValue(java.lang.String value) Converts the String value to a value associated with the specific StatsValues implementation
protected void	updateMinMax(java.lang.Number min, java.lang.Number max) Updates the minimum and maximum statistics based on the given values
void	updateTypeSpecificStats(NamedList stv) Updates the type specific statistics based on the values in the given list
void	updateTypeSpecificStats(java.lang.Number v) Updates the type specific statistics based on the given value
void	updateTypeSpecificStats(java.lang.Number v, int count) Updates the type specific statistics based on the given value

Methods inherited from class org.apache.solr.handler.component.AbstractStatsValues

accumulate, accumulate, accumulate, addFacet, addMissing, getStatsValues, missing

Methods inherited from class java.lang.Object

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

Field Detail

sum

double sum

sumOfSquares

double sumOfSquares

Constructor Detail

NumericStatsValues

public NumericStatsValues(FieldType fieldType)

Method Detail

updateTypeSpecificStats

public void updateTypeSpecificStats(NamedList stv)

Updates the type specific statistics based on the values in the given list

Specified by:

updateTypeSpecificStats in class AbstractStatsValues<java.lang.Number>

Parameters:

stv - List containing values the current statistics should be updated against

updateTypeSpecificStats

public void updateTypeSpecificStats(java.lang.Number v)

Updates the type specific statistics based on the given value

Specified by:

updateTypeSpecificStats in class AbstractStatsValues<java.lang.Number>

Parameters:

v - Value the statistics should be updated against

updateTypeSpecificStats

public void updateTypeSpecificStats(java.lang.Number v,
                                    int count)

Updates the type specific statistics based on the given value

Specified by:

updateTypeSpecificStats in class AbstractStatsValues<java.lang.Number>

Parameters:

v - Value the statistics should be updated against

count - Number of times the value is being accumulated

updateMinMax

protected void updateMinMax(java.lang.Number min,
                            java.lang.Number max)

Updates the minimum and maximum statistics based on the given values

Specified by:

updateMinMax in class AbstractStatsValues<java.lang.Number>

Parameters:

min - Value that the current minimum should be updated against

max - Value that the current maximum should be updated against

toTypedValue

protected java.lang.Double toTypedValue(java.lang.String value)

Converts the String value to a value associated with the specific StatsValues implementation

Specified by:

toTypedValue in class AbstractStatsValues<java.lang.Number>

Parameters:

value - String value to convert

Returns:

Value converted to a type associated with the specific implementation

addTypeSpecificStats

protected void addTypeSpecificStats(NamedList<java.lang.Object> res)

Adds sum, sumOfSquares, mean and standard deviation statistics to the given NamedList

Specified by:

addTypeSpecificStats in class AbstractStatsValues<java.lang.Number>

Parameters:

res - NamedList to add the type specific statistics too

getStandardDeviation

private double getStandardDeviation()

Calculates the standard deviation statistic

Returns:

Standard deviation statistic