org.deegree.model.filterencoding
Class PropertyIsInstanceOfOperation

java.lang.Object
  org.deegree.model.filterencoding.AbstractOperation
      org.deegree.model.filterencoding.ComparisonOperation
          org.deegree.model.filterencoding.PropertyIsInstanceOfOperation

All Implemented Interfaces:

Operation

public class PropertyIsInstanceOfOperation
extends ComparisonOperation

deegree-specific ComparisonOperation that allows to check the type of a property.

This is useful if the property has an abstract type with several concrete implementations, for example 'gml:_Geometry'.

NOTE: Currently supported types to test are:

• gml:Point
• gml:_Curve
• gml:_Surface

Version:

$Revision: 7916 $, $Date: 2007-08-06 14:23:58 +0200 (Mo, 06 Aug 2007) $

Author:

Markus Schneider, last edited by: $Author: rbezema $

Field Summary

Fields inherited from class org.deegree.model.filterencoding.AbstractOperation

operatorId

Constructor Summary

PropertyIsInstanceOfOperation(PropertyName propertyName, QualifiedName typeName)
Creates a new instance of PropertyIsInstanceOfOperation.

Method Summary

static Operation	buildFromDOM(Element element) Given a DOM-fragment, a corresponding Operation-object is built.
boolean	evaluate(Feature feature) Calculates the Operation's logical value based on the certain property values of the given feature.
PropertyName	getPropertyName()
StringBuffer	toXML() Produces an XML representation of this object.

Methods inherited from class org.deegree.model.filterencoding.ComparisonOperation

buildFromDOM

Methods inherited from class org.deegree.model.filterencoding.AbstractOperation

getOperatorId, getOperatorName

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyIsInstanceOfOperation

public PropertyIsInstanceOfOperation(PropertyName propertyName,
                                     QualifiedName typeName)

Creates a new instance of PropertyIsInstanceOfOperation.

Parameters:

propertyName -

typeName -

Method Detail

toXML

public StringBuffer toXML()

Produces an XML representation of this object.

evaluate

public boolean evaluate(Feature feature)
                 throws FilterEvaluationException

Calculates the Operation's logical value based on the certain property values of the given feature.

Parameters:

feature - that determines the values of PropertyNames in the expression

Returns:

true, if the Operation evaluates to true, else false

Throws:

FilterEvaluationException - if the evaluation fails

buildFromDOM

public static Operation buildFromDOM(Element element)
                              throws FilterConstructionException

Given a DOM-fragment, a corresponding Operation-object is built. This method recursively calls other buildFromDOM () - methods to validate the structure of the DOM-fragment.

Parameters:

element - to build from

Returns:

the Bean of the DOM

Throws:

FilterConstructionException - if the structure of the DOM-fragment is invalid

getPropertyName

public PropertyName getPropertyName()

Returns:

the propertyName of this Operation