org.geotools.filter.function

Class Classifier

Object

Classifier

Direct Known Subclasses:

ExplicitClassifier, RangedClassifier

public abstract class Classifier
extends Object

The data structure returned by classification functions. We can take this object, tweak it, and then pass it to a ClassifyFunction.

Author:

Cory Horner, Refractions Research

Constructor Summary

Constructors

Constructor and Description
Classifier()

Method Summary

Modifier and Type	Method and Description
int	classify(Expression expr, Object feature) Returns the slot containing the passed expression's value.
abstract int	classify(Object value) Returns the slot this value belongs in.
double[]	getPercentages()
abstract int	getSize()
String	getTitle(int slot)
String[]	getTitles()
void	setPercentages(double[] percentages)
void	setTitle(int slot, String title)
void	setTitles(String... titles)

Methods inherited from class Object

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

Constructor Detail

Classifier

public Classifier()

Method Detail

getTitles

public String[] getTitles()

setTitles

public void setTitles(String... titles)

setTitle

public void setTitle(int slot,
                     String title)

getTitle

public String getTitle(int slot)

classify

public int classify(Expression expr,
                    Object feature)

Returns the slot containing the passed expression's value.

classify

public abstract int classify(Object value)

Returns the slot this value belongs in.

Returns:

index, starting from zero

getSize

public abstract int getSize()

Returns:

the number of bins

getPercentages

public double[] getPercentages()

Returns:

percentages for each class

setPercentages

public void setPercentages(double[] percentages)

Parameters:

percentages - a double array with percentages for each class