org.geotools.feature.visitor

Class UniqueCountVisitor

Object

UniqueVisitor

UniqueCountVisitor

All Implemented Interfaces:

FeatureAttributeVisitor, FeatureCalc, LimitingVisitor, FeatureVisitor

public class UniqueCountVisitor
extends UniqueVisitor

Determines the number of unique features in the collection on the basis of the specified feature attribute.

Nested Class Summary

Nested classes/interfaces inherited from class UniqueVisitor

UniqueVisitor.UniqueResult

Constructor Summary

Constructors

Constructor and Description
UniqueCountVisitor(Expression expr)
UniqueCountVisitor(int attributeTypeIndex, SimpleFeatureType type)
UniqueCountVisitor(String attributeTypeName)
UniqueCountVisitor(String attrName, SimpleFeatureType type)

Method Summary

Modifier and Type	Method and Description
CalcResult	getResult() Returns the result of the calculation as a handy object which can be merged and modified.
void	setValue(Integer count)

Methods inherited from class UniqueVisitor

getExpression, getExpressions, getMaxFeatures, getResultType, getStartIndex, getUnique, hasLimits, init, isPreserveOrder, reset, setMaxFeatures, setPreserveOrder, setStartIndex, setValue, visit, visit

Methods inherited from class Object

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

Constructor Detail

UniqueCountVisitor

public UniqueCountVisitor(String attributeTypeName)

UniqueCountVisitor

public UniqueCountVisitor(int attributeTypeIndex,
                          SimpleFeatureType type)
                   throws IllegalFilterException

Throws:

IllegalFilterException

UniqueCountVisitor

public UniqueCountVisitor(String attrName,
                          SimpleFeatureType type)
                   throws IllegalFilterException

Throws:

IllegalFilterException

UniqueCountVisitor

public UniqueCountVisitor(Expression expr)

Method Detail

setValue

public void setValue(Integer count)

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

Overrides:

getResult in class UniqueVisitor

Returns:

the results of the calculation