org.geotools.data.postgis.filter

Class FilterFunction_pgNearest

Object

ExpressionAbstract

DefaultExpression

FunctionExpressionImpl

FilterFunction_pgNearest

All Implemented Interfaces:

FunctionExpression, Factory, Expression, Function, VolatileFunction

public class FilterFunction_pgNearest
extends FunctionExpressionImpl
implements VolatileFunction

NEAREST function implementation for Postgis
Function name: pgNearest
example:

     pgNearest(POINT(16.36 48.205),30)=true 

Author:

Fernando Mino, Geosolutions

Field Summary

Fields

Modifier and Type	Field and Description
static FunctionName	NAME

Fields inherited from class FunctionExpressionImpl

fallback, functionName, name, params

Fields inherited from interface Expression

NIL

Constructor Summary

Constructors

Constructor and Description
FilterFunction_pgNearest()

Method Summary

Modifier and Type	Method and Description
Object	evaluate(Object feature) Subclass should override, default implementation returns null.

Methods inherited from class FunctionExpressionImpl

accept, equals, functionName, getExpression, getFallbackValue, getFunctionName, getImplementationHints, getName, getParameters, hashCode, setFallbackValue, setParameters, toString

Methods inherited from class DefaultExpression

isAttributeExpression, isExpression, isFunctionExpression, isGeometryExpression, isLiteralExpression, isMathExpression

Methods inherited from class ExpressionAbstract

evaluate

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface Function

getFallbackValue, getFunctionName, getName, getParameters

Methods inherited from interface Expression

accept, evaluate

Field Detail

NAME

public static FunctionName NAME

Constructor Detail

FilterFunction_pgNearest

public FilterFunction_pgNearest()

Method Detail

evaluate

public Object evaluate(Object feature)

Description copied from class: ExpressionAbstract

Subclass should override, default implementation returns null.

Specified by:

evaluate in interface Expression

Overrides:

evaluate in class FunctionExpressionImpl

Returns:

default implementation returns null