org.geotools.feature.visitor
Class UniqueVisitor

Object
  extended by UniqueVisitor
All Implemented Interfaces:
FeatureCalc, FeatureVisitor

public class UniqueVisitor
extends Object
implements FeatureCalc

Generates a list of unique values from a collection

Since:
2.2.M2
Author:
Cory Horner, Refractions
Module:
modules/library/main (gt-main.jar)

Nested Class Summary
static class UniqueVisitor.UniqueResult
           
 
Constructor Summary
UniqueVisitor(Expression expr)
           
UniqueVisitor(int attributeTypeIndex, SimpleFeatureType type)
           
UniqueVisitor(String attributeTypeName)
           
UniqueVisitor(String attrName, SimpleFeatureType type)
           
 
Method Summary
 Expression getExpression()
           
 CalcResult getResult()
          Returns the result of the calculation as a handy object which can be merged and modified.
 Set getUnique()
           
 void init(FeatureCollection<SimpleFeatureType,SimpleFeature> collection)
           
 void reset()
           
 void setValue(Object newSet)
           
 void visit(Feature feature)
           
 void visit(SimpleFeature feature)
           
 
Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

UniqueVisitor

public UniqueVisitor(String attributeTypeName)

UniqueVisitor

public UniqueVisitor(int attributeTypeIndex,
                     SimpleFeatureType type)
              throws IllegalFilterException
Throws:
IllegalFilterException

UniqueVisitor

public UniqueVisitor(String attrName,
                     SimpleFeatureType type)
              throws IllegalFilterException
Throws:
IllegalFilterException

UniqueVisitor

public UniqueVisitor(Expression expr)
Method Detail

init

public void init(FeatureCollection<SimpleFeatureType,SimpleFeature> collection)

visit

public void visit(SimpleFeature feature)

visit

public void visit(Feature feature)
Specified by:
visit in interface FeatureVisitor

getExpression

public Expression getExpression()

getUnique

public Set getUnique()

setValue

public void setValue(Object newSet)

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


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