IsSurface with XPathExpression fails

[lgoltz]

Example:

 <ogc:Function name="IsSurface">
    <ogc:PropertyName>bu-core2d:geometry2D/bu-base:BuildingGeometry2D/bu-base:geometry</ogc:PropertyName>
</ogc:Function>

GetMap does not render the features. Warning in the log: [07:36:09] WARN: [SymbologyParser?] Evaluating the following expression resulted in an error 'The IsSurface? function's first argument did not evaluate to a geometry.'

[stempler]

Looks like this fails because

deegree3/deegree-core/deegree-core-base/src/main/java/org/deegree/filter/utils/FilterUtils.java

Line 55 in 1e60957

public static Geometry getGeometryValue( TypedObjectNode node ) {

is called with a GenericXMLElement as parameter that has the geometry in its children collection (at least in my test case).