Java 6, JAXB 2 and X3D (version 3.0)

Question

Hi everyone,
I'm trying to unmarshall a X3D file using JAXB2 included in Java 6. I successfully generated the classes from the schema (http://www.web3d.org/specifications/x3d-3.0.xsd). I then created a simple X3D file using Blender and the Duke model available at https://duke.dev.java.net/models/Duke.lwo.
However, when I try to unmarshall the model I get an exception. The X3D-file validates correctly using the validator in IntelliJ IDEA, but JAXB seems to fail somehow.
The code used for unmarshalling:
public static X3D loadModel(File input) {
    X3D model = null;
    try {
        JAXBContext context = JAXBContext.newInstance();
        Unmarshaller unmarshaller = context.createUnmarshaller();
        unmarshaller.setSchema(null);
        unmarshaller.setEventHandler(new javax.xml.bind.helpers.DefaultValidationEventHandler());
        model = (X3D) unmarshaller.unmarshal(input);
    } catch (Exception e) {
        e.printStackTrace();  // TODO Fix exception handling.
    return model;
}The Exception I get is:
DefaultValidationEventHandler: [FATAL_ERROR]: unexpected element (uri:"", local:"X3D"). Expected elements are (none)
Location: line 4 of file:/C:/Projects/JFokus/jfokus-demos/jogl-presentation/Duke.x3d
javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"X3D"). Expected elements are (none)
     at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEvent(UnmarshallingContext.java:523)
     at com.sun.xml.internal.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java:199)
     at com.sun.xml.internal.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java:194)
     at com.sun.xml.internal.bind.v2.runtime.unmarshaller.Loader.reportUnexpectedChildElement(Loader.java:71)
     at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext$DefaultRootLoader.childElement(UnmarshallingContext.java:920)
     at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:366)
     at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:347)
     at com.sun.xml.internal.bind.v2.runtime.unmarshaller.SAXConnector.startElement(SAXConnector.java:101)
     at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:501)
     at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:767)
     at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:400)
     at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:626)
     at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3084)
     at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:912)
     at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:645)
     at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
     at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:508)
     at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
     at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
     at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
     at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
     at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
     at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:194)
     at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:167)
     at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:137)
     at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:142)
     at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:151)
     at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:169)
     at se.jsolutions.jogl.X3dModel.loadModel(X3dModel.java:27)
     at se.jsolutions.jogl.X3dModel.main(X3dModel.java:37)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Done!
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)
Tried with other X3D-models I found online, with the same result. Any suggestions or help would be greatly appreciated.
Thanks!
// Erik

Answer 1

public static X3D loadModel(File input) {
   X3D model = null;
   try {
      JAXBContext context = JAXBContext.newInstance(model.getPackage().getName());
      Unmarshaller unmarshaller = context.createUnmarshaller();
      model = (X3D) unmarshaller.unmarshal(input);
   } catch (Exception e) {
      e.printStackTrace();  // TODO Fix exception handling.
   return model;
}