org.geotools.filter.function

Class QuantileFunction

Object

ExpressionAbstract

DefaultExpression

ClassificationFunction

AbstractQuantityClassificationFunction

QuantileFunction

All Implemented Interfaces:

FunctionExpression, Factory, Expression, Function

public class QuantileFunction
extends AbstractQuantityClassificationFunction

Breaks a SimpleFeatureCollection into classes with an equal number of items in each.

Author:

Cory Horner, Refractions Research Inc.

Field Summary

Fields

Modifier and Type	Field and Description
static FunctionName	NAME

Fields inherited from class ClassificationFunction

LOGGER

Fields inherited from interface Expression

NIL

Constructor Summary

Constructors

Constructor and Description
QuantileFunction()

Method Summary

Modifier and Type	Method and Description
protected QuantileListVisitor	getListVisitor() Returns the list visitor for the specific implementation of "quantity" (e.g., count, area, ...).
protected boolean	percentages()

Methods inherited from class AbstractQuantityClassificationFunction

evaluate

Methods inherited from class ClassificationFunction

accept, computeGroupByPercentages, computePercentage, decimalPlaces, fixRound, getClasses, getFallbackValue, getFunctionName, getImplementationHints, getName, getParameters, getProgressListener, round, setClasses, setFallbackValue, setParameters, setProgressListener, toString

Methods inherited from class DefaultExpression

isAttributeExpression, isExpression, isFunctionExpression, isGeometryExpression, isLiteralExpression, isMathExpression

Methods inherited from class ExpressionAbstract

evaluate

Methods inherited from class Object

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

Methods inherited from interface Expression

evaluate

Field Detail

NAME

public static FunctionName NAME

Constructor Detail

QuantileFunction

public QuantileFunction()

Method Detail

getListVisitor

protected QuantileListVisitor getListVisitor()

Description copied from class: AbstractQuantityClassificationFunction

Returns the list visitor for the specific implementation of "quantity" (e.g., count, area, ...). The visitor must return a "bins" structure matching {code}List[]{code}, where each array entry is a bin, and values inside the bin are sorted from lowest to highest

Specified by:

getListVisitor in class AbstractQuantityClassificationFunction

percentages

protected boolean percentages()

Specified by:

percentages in class AbstractQuantityClassificationFunction

Returns:

true if percentages computation is enabled, false if not