org.geotools.feature.visitor

Class EqualAreaListVisitor

Object

EqualAreaListVisitor

All Implemented Interfaces:

FeatureCalc, FeatureVisitor

public class EqualAreaListVisitor
extends Object
implements FeatureCalc

Obtains the data needed for a Equal Area operation (classification of features into classes each roughly having the same area).

The result contains an array of lists with the expression values in each.

Author:

Andrea Aime, GeoSolutions

Constructor Summary

Constructors

Constructor and Description
EqualAreaListVisitor(Expression expression, Expression areaExpression, int bins)

Method Summary

Modifier and Type	Method and Description
int	getNaNCount()
int	getNullCount()
CalcResult	getResult() Returns the result of the calculation as a handy object which can be merged and modified.
void	init(SimpleFeatureCollection collection)
void	reset(int bins)
void	visit(Feature feature) Visit the provided feature.
void	visit(SimpleFeature feature)

Methods inherited from class Object

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

Constructor Detail

EqualAreaListVisitor

public EqualAreaListVisitor(Expression expression,
                            Expression areaExpression,
                            int bins)

Method Detail

init

public void init(SimpleFeatureCollection collection)

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(SimpleFeature feature)

visit

public void visit(Feature feature)

Description copied from interface: FeatureVisitor

Visit the provided feature.

Please consult the documentation for the FeatureCollection you are visiting to learn more - the provided feature may be invalid, or read only.

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