org.geotools.feature.visitor
Class QuantileListVisitor

java.lang.Object
  org.geotools.feature.visitor.QuantileListVisitor

All Implemented Interfaces:

FeatureCalc, FeatureVisitor

public class QuantileListVisitor

extends java.lang.Object

implements FeatureCalc

Obtains the data needed for a Quantile operation (classification of features into classes of equal size). The result contains an array of lists with the expression values in each.

Author:

Cory Horner, Refractions Research Inc.

Constructor Summary

QuantileListVisitor(Expression expr, int bins)

Method Summary

int	getNaNCount()
int	getNullCount()
CalcResult	getResult() Returns the result of the calculation as a handy object which can be merged and modified.
void	reset(int bins)
void	visit(Feature feature)

Methods inherited from class java.lang.Object

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

Constructor Detail

QuantileListVisitor

public QuantileListVisitor(Expression expr,
                           int bins)

Method Detail

getResult

public CalcResult getResult()

Description copied from interface: FeatureCalc

Returns the result of the calculation as a handy object which can be merged and modified.

Specified by:

getResult in interface FeatureCalc

Returns:

the results of the calculation

visit

public void visit(Feature feature)

Specified by:

visit in interface FeatureVisitor

reset

public void reset(int bins)

getNaNCount

public int getNaNCount()

Returns:

the number of features which returned a NaN

getNullCount

public int getNullCount()

Returns:

the number of features which returned a null