org.geotools.feature.visitor
Class AverageVisitor

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

All Implemented Interfaces:

FeatureCalc, FeatureVisitor

public class AverageVisitor

extends java.lang.Object

implements FeatureCalc

Calculates the Average

Since:

2.2.M2

Author:

Cory Horner, Refractions

Nested Class Summary

static class

AverageVisitor.AverageResult

Constructor Summary

AverageVisitor(Expression expr)
Constructor class for the AverageVisitor using an expression

AverageVisitor(int attributeTypeIndex, FeatureType type)
Constructor class for the AverageVisitor using AttributeType ID

AverageVisitor(java.lang.String attrName, FeatureType type)
Constructor class for the AverageVisitor using AttributeType Name

Method Summary

java.lang.Object	getAverage() Returns the average from the visitor's current
Expression	getExpression()
CalcResult	getResult() Returns a CalcResult object (containing the Average)
void	reset() Resets the "Average" strategy pattern
void	setValue(int newCount, java.lang.Object newSum)
void	setValue(java.lang.Object newAverage)
void	visit(Feature feature)

Methods inherited from class java.lang.Object

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

Constructor Detail

AverageVisitor

public AverageVisitor(int attributeTypeIndex,
                      FeatureType type)
               throws IllegalFilterException

Constructor class for the AverageVisitor using AttributeType ID

Parameters:

attributeTypeIndex - integer representing the AttributeType

type - FeatureType

Throws:

IllegalFilterException

AverageVisitor

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

Constructor class for the AverageVisitor using AttributeType Name

Parameters:

attrName - string respresenting the AttributeType

type - FeatureType

Throws:

IllegalFilterException

AverageVisitor

public AverageVisitor(Expression expr)
               throws IllegalFilterException

Constructor class for the AverageVisitor using an expression

Parameters:

expr -

Throws:

IllegalFilterException

Method Detail

visit

public void visit(Feature feature)

Specified by:

visit in interface FeatureVisitor

getExpression

public Expression getExpression()

getAverage

public java.lang.Object getAverage()

Returns the average from the visitor's current

Returns:

the average

reset

public void reset()

Resets the "Average" strategy pattern

getResult

public CalcResult getResult()

Returns a CalcResult object (containing the Average)

Specified by:

getResult in interface FeatureCalc

Returns:

setValue

public void setValue(java.lang.Object newAverage)

setValue

public void setValue(int newCount,
                     java.lang.Object newSum)