org.geotools.feature.visitor
Class MedianVisitor

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

All Implemented Interfaces:

FeatureCalc, FeatureVisitor

public class MedianVisitor

extends java.lang.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, FeatureType type)

MedianVisitor(java.lang.String attrName, FeatureType type)

Method Summary

Expression	getExpression()
java.lang.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	reset() Reset the stored information about the median.
void	setValue(java.lang.Comparable median)
void	setValue(java.util.List list)
void	visit(Feature feature)

Methods inherited from class java.lang.Object

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

Constructor Detail

MedianVisitor

public MedianVisitor(int attributeTypeIndex,
                     FeatureType type)
              throws IllegalFilterException

MedianVisitor

public MedianVisitor(java.lang.String attrName,
                     FeatureType type)
              throws IllegalFilterException

MedianVisitor

public MedianVisitor(Expression expr)
              throws IllegalFilterException

Method Detail

visit

public void visit(Feature feature)

Specified by:

visit in interface FeatureVisitor

getExpression

public Expression getExpression()

getMedian

public java.lang.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(java.util.List list)

setValue

public void setValue(java.lang.Comparable median)