Package org.geotools.filter.function

Class FilterFunction_offset

Object

ExpressionAbstract

DefaultExpression

FunctionExpressionImpl

FilterFunction_offset

All Implemented Interfaces:

Expression, Function, GeometryTransformation, FunctionExpression, Factory

public class FilterFunction_offset
extends FunctionExpressionImpl
implements GeometryTransformation

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FilterFunction_offset.OffsetOrdinateFilter	Applies an offset to the X and Y coordinates

Field Summary

Fields

Modifier and Type	Field	Description
static FunctionName	NAME

Fields inherited from class FunctionExpressionImpl

fallback, functionName, name, params

Fields inherited from interface Expression

NIL

Constructor Summary

Constructors

Constructor	Description
FilterFunction_offset()

Method Summary

Modifier and Type	Method	Description
Object	evaluate(Object feature)	Subclass should override, default implementation returns null.
int	getArgCount()
ReferencedEnvelope	invert(ReferencedEnvelope renderingEnvelope)	Returns an translated rendering envelope if the offsets are not using feature attributes.

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 Expression

accept, evaluate

Methods inherited from interface Function

getFallbackValue, getFunctionName, getName, getParameters

Field Details

NAME

public static FunctionName NAME

Constructor Details

FilterFunction_offset

public FilterFunction_offset()

Method Details

getArgCount

public int getArgCount()

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

invert

public ReferencedEnvelope invert(ReferencedEnvelope renderingEnvelope)

Returns an translated rendering envelope if the offsets are not using feature attributes. If the offsets are feature dependent the user will have to expand the rendering area via the renderer buffer parameter

Specified by:

invert in interface GeometryTransformation