How to write GML parser with Geotools?

Question

I wrote a Parser for a GML file from the OS Mastermap with geotools 8.4. With one part I still have a problem. This sniplet of the xsd:

<complexType name="RoadLinkType">
    <complexContent>
        <extension base="osgb:AbstractFeatureType">
            <sequence>
                <element name="polyline" type="gml:GeometryPropertyType"/>
                <element name="directedNode" type="osgb:directedNodeAssociationType" minOccurs="2" maxOccurs="2"/>
            </sequence>
        </extension>
    </complexContent>
</complexType>

The part from the gml file:

<osgb:RoadLink fid='osgb4000000023204016'>
    <osgb:polyline>
        <gml:LineString srsName='osgb:BNG'>
            <gml:coordinates>516609.000,257678.000 516615.000,257733.000 516618.000,257786.000</gml:coordinates>
        </gml:LineString>
    </osgb:polyline>
    <osgb:directedNode orientation='-' xlink:href='#osgb4000000027916595'/>
    <osgb:directedNode orientation='+' gradeSeparation='1' xlink:href='#osgb4000000028203009'/>
</osgb:RoadLink>

It gets parsed nearly right, i.e. the polyline is correct (I get a class com.vividsolutions.jts.geom.LineString) but I only get one (instead of two) directedNode.

My code:

GML gml = new GML(Version.GML3);
CRSAuthorityFactory crsFac = ReferencingFactoryFinder.getCRSAuthorityFactory("EPSG", null);
CoordinateReferenceSystem osgbCrs = crsFac.createCoordinateReferenceSystem("EPSG:27700");
gml.setCoordinateReferenceSystem(osgbCrs);
SimpleFeatureIterator iter = gml.decodeFeatureIterator(in);
while (iter.hasNext())
{
    SimpleFeature feature = iter.next();
    System.out.println("id: " + feature.getID());
    System.out.println("polyline: " + feature.getAttribute("polyline"));
    Object dnode = feature.getAttribute("directedNode");
    System.out.println("directedNode: '" + dnode + "'\t" + dnode.getClass());
}

And the output:

id: osgb4000000023204016
polyline: LINESTRING (516609 257678, 516615 257733, 516618 257786)
directedNode: '{orientation=-, href=#osgb4000000027916595}' class java.util.HashMap

What am I doing wrong? Why don't I get both directedNode? How can I do the binding to real Java Objects?