org.geotools.feature.visitor
Class MedianVisitor

Object
  MedianVisitor

All Implemented Interfaces:

FeatureCalc, FeatureVisitor

public class MedianVisitor
extends Object
implements FeatureCalc

Calculates the median of an attribute in all features of a collection

Since:

2.2.M2

Author:

Cory Horner, Refractions

Nested Class Summary

static class

MedianVisitor.MedianResult

Constructor Summary

MedianVisitor(Expression expr)

MedianVisitor(int attributeTypeIndex, SimpleFeatureType type)

MedianVisitor(String attributeTypeName)

MedianVisitor(String attrName, SimpleFeatureType type)

Method Summary

Expression	getExpression()
Object	getMedian() Return the median of all features in the collection
CalcResult	getResult() Returns the result of the calculation as a handy object which can be merged and modified.
void	init(SimpleFeatureCollection collection)
void	reset() Reset the stored information about the median.
void	setValue(Comparable median)
void	setValue(List list)
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

MedianVisitor

public MedianVisitor(String attributeTypeName)

MedianVisitor

public MedianVisitor(int attributeTypeIndex,
                     SimpleFeatureType type)
              throws IllegalFilterException

Throws:

IllegalFilterException

MedianVisitor

public MedianVisitor(String attrName,
                     SimpleFeatureType type)
              throws IllegalFilterException

Throws:

IllegalFilterException

MedianVisitor

public MedianVisitor(Expression expr)
              throws IllegalFilterException

Throws:

IllegalFilterException

Method Detail

init

public void init(SimpleFeatureCollection collection)

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

getExpression

public Expression getExpression()

getMedian

public Object getMedian()

Return the median of all features in the collection

reset

public void reset()

Reset the stored information about the median.

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

setValue

public void setValue(List list)

setValue

public void setValue(Comparable median)