org.geotools.feature.visitor

Interface FeatureAttributeVisitor

All Superinterfaces:

FeatureVisitor

All Known Implementing Classes:

AverageVisitor, GroupByVisitor, MaxVisitor, MedianVisitor, MinVisitor, NearestVisitor, StandardDeviationVisitor, SumAreaVisitor, SumVisitor, UniqueCountVisitor, UniqueVisitor

public interface FeatureAttributeVisitor
extends FeatureVisitor

Extension of FeatureVisitor for visitors that require access to properties of the feature collection being visited.

Author:

Justin Deoliveira, OpenGeo

Method Summary

Modifier and Type	Method and Description
List<Expression>	getExpressions() List of expressions used by visitor.
default Optional<List<Class>>	getResultType(List<Class> inputTypes) Returns the expected output type given the input type.

Methods inherited from interface FeatureVisitor

visit

Method Detail

getExpressions

List<Expression> getExpressions()

List of expressions used by visitor.

getResultType

default Optional<List<Class>> getResultType(List<Class> inputTypes)

Returns the expected output type given the input type.

Parameters:

inputTypes - The type of the input expressions

Throws:

IllegalArgumentException - If the list of input types is not a match for the getExpressions() result or is not acceptable for this visito