org.geotools.filter.function
Class QuantileFunction

java.lang.Object
  org.geotools.filter.expression.ExpressionAbstract
      org.geotools.filter.DefaultExpression
          org.geotools.filter.FunctionExpressionImpl
              org.geotools.filter.function.ClassificationFunction
                  org.geotools.filter.function.RangedClassificationFunction
                      org.geotools.filter.function.QuantileFunction

All Implemented Interfaces:

org.opengis.filter.expression.Expression, Expression, ExpressionType, Factory, org.opengis.filter.expression.Function, FunctionExpression

public class QuantileFunction

extends RangedClassificationFunction

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

Author:

Cory Horner, Refractions Research Inc.

Field Summary

Fields inherited from class org.geotools.filter.DefaultExpression

expressionType, permissiveConstruction

Fields inherited from interface org.geotools.filter.expression.ExpressionType

ATTRIBUTE, ATTRIBUTE_DOUBLE, ATTRIBUTE_GEOMETRY, ATTRIBUTE_INTEGER, ATTRIBUTE_STRING, ATTRIBUTE_UNDECLARED, FUNCTION, LITERAL_DOUBLE, LITERAL_GEOMETRY, LITERAL_INTEGER, LITERAL_STRING, MATH_ADD, MATH_DIVIDE, MATH_MULTIPLY, MATH_SUBTRACT

Constructor Summary

QuantileFunction()

Method Summary

java.lang.Object	evaluate(Feature feature) Evaluates the expression against an instance of Feature.
java.lang.Object	getMax(int index) Returns the upper bound value for the bin.
java.lang.Object	getMin(int index) Returns the lower bound value for the bin.
java.lang.String	getName() Gets the name of this function.
java.lang.Object	getValue(int index) Determines the value(s) for the indexed slot/bin/bucket.
void	setExpression(Expression e)

Methods inherited from class org.geotools.filter.function.ClassificationFunction

decimalPlaces, fixRound, getArgCount, getArgs, getCollection, getExpression, getNumberOfClasses, getProgressListener, round, setArgs, setCollection, setNumberOfClasses, setProgressListener

Methods inherited from class org.geotools.filter.FunctionExpressionImpl

accept, getImplementationHints, getParameters, getType, setName, setParameters

Methods inherited from class org.geotools.filter.DefaultExpression

accept, evaluate, getValue, isAttributeExpression, isExpression, isGeometryExpression, isLiteralExpression, isMathExpression, isMathExpression

Methods inherited from class org.geotools.filter.expression.ExpressionAbstract

eval

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.geotools.filter.expression.FunctionExpression

getType

Methods inherited from interface org.geotools.filter.expression.Expression

accept, getValue

Methods inherited from interface org.opengis.filter.expression.Expression

accept, evaluate

Methods inherited from interface org.geotools.factory.Factory

getImplementationHints

Methods inherited from interface org.opengis.filter.expression.Function

getParameters, setName, setParameters

Constructor Detail

QuantileFunction

public QuantileFunction()

Method Detail

getName

public java.lang.String getName()

Description copied from interface: FunctionExpression

Gets the name of this function.

Specified by:

getName in interface FunctionExpression

Specified by:

getName in class RangedClassificationFunction

evaluate

public java.lang.Object evaluate(Feature feature)

Description copied from interface: Expression

Evaluates the expression against an instance of Feature.

Specified by:

evaluate in interface Expression

Specified by:

evaluate in class RangedClassificationFunction

setExpression

public void setExpression(Expression e)

Overrides:

setExpression in class ClassificationFunction

getValue

public java.lang.Object getValue(int index)

Determines the value(s) for the indexed slot/bin/bucket.

Overrides:

getValue in class ClassificationFunction

Returns:

the value

getMin

public java.lang.Object getMin(int index)

Description copied from class: RangedClassificationFunction

Returns the lower bound value for the bin.

Specified by:

getMin in class RangedClassificationFunction

Parameters:

index -

Returns:

getMax

public java.lang.Object getMax(int index)

Description copied from class: RangedClassificationFunction

Returns the upper bound value for the bin.

Specified by:

getMax in class RangedClassificationFunction

Parameters:

index -

Returns: