Package org.geotools.appschema.filter

Class NestedAttributeExpression

Object

ExpressionAbstract

DefaultExpression

AttributeExpressionImpl

NestedAttributeExpression

All Implemented Interfaces:

Expression, PropertyName

public class NestedAttributeExpression
extends AttributeExpressionImpl

This class represents a list of expressions broken up from a single XPath expression that is nested in more than one feature. The purpose is to allow filtering these attributes on the parent feature.

Author:

Rini Angreani (CSIRO Earth Science and Resource Engineering)

Field Summary

Fields inherited from class AttributeExpressionImpl

attPath, lenient, namespaceSupport, schema

Fields inherited from interface Expression

NIL

Constructor Summary

Constructors

Constructor	Description
NestedAttributeExpression(XPathUtil.StepList xpath, NestedAttributeMapping nestedMapping)	First constructor

Method Summary

Modifier and Type	Method	Description
Object	accept(ExpressionVisitor visitor, Object extraData)	Used by FilterVisitors to perform some action on this filter instance.
Object	evaluate(Object object)	see AttributeExpressionImpl.evaluate(Object)

Methods inherited from class AttributeExpressionImpl

equals, evaluate, getNamespaceContext, getPropertyName, hashCode, isLenient, setLenient, setPropertyName, toString

Methods inherited from class DefaultExpression

isAttributeExpression, isExpression, isFunctionExpression, isGeometryExpression, isLiteralExpression, isMathExpression

Methods inherited from class Object

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

Constructor Detail

NestedAttributeExpression

public NestedAttributeExpression(XPathUtil.StepList xpath,
                                 NestedAttributeMapping nestedMapping)

First constructor

Parameters:

xpath - Attribute XPath

Method Detail

evaluate

public Object evaluate(Object object)

see AttributeExpressionImpl.evaluate(Object)

Specified by:

evaluate in interface Expression

Overrides:

evaluate in class AttributeExpressionImpl

Parameters:

object - Object from which we need to extract a property value.

Returns:

default implementation returns null

accept

public Object accept(ExpressionVisitor visitor,
                     Object extraData)

Description copied from class: AttributeExpressionImpl

Used by FilterVisitors to perform some action on this filter instance. Typicaly used by Filter decoders, but may also be used by any thing which needs infomration from filter structure. Implementations should always call: visitor.visit(this); It is importatant that this is not left to a parent class unless the parents API is identical.

Specified by:

accept in interface Expression

Overrides:

accept in class AttributeExpressionImpl

Parameters:

visitor - The visitor which requires access to this filter, the method must call visitor.visit(this);