org.geotools.feature.visitor
Class SumVisitor

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

All Implemented Interfaces:

FeatureCalc, FeatureVisitor

public class SumVisitor

extends java.lang.Object

implements FeatureCalc

Calculates the Sum of an attribute (of a FeatureVisitor)

Since:

2.2.M2

Author:

Cory Horner, Refractions

Nested Class Summary

static class

SumVisitor.SumResult

Constructor Summary

SumVisitor(Expression expr)

SumVisitor(int attributeTypeIndex, FeatureType type)

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

Method Summary

Expression	getExpression()
CalcResult	getResult() Returns the result of the calculation as a handy object which can be merged and modified.
java.lang.Object	getSum()
void	reset()
void	setValue(java.lang.Object newSum)
void	visit(Feature feature)

Methods inherited from class java.lang.Object

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

Constructor Detail

SumVisitor

public SumVisitor(int attributeTypeIndex,
                  FeatureType type)
           throws IllegalFilterException

SumVisitor

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

SumVisitor

public SumVisitor(Expression expr)
           throws IllegalFilterException

Method Detail

visit

public void visit(Feature feature)

Specified by:

visit in interface FeatureVisitor

getExpression

public Expression getExpression()

getSum

public java.lang.Object getSum()

setValue

public void setValue(java.lang.Object newSum)

reset

public void reset()

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