getVersion of the class org.codehaus.jettison.AbstractXMLStreamReader could return 1.0 or 1.1 to enable to create DOM document with Xalan

The following code

JSONObject object = new JSONObject("{'firstName':{'altitude':'39000','pilot':{'firstName':'Buzz','lastName':'Aldrin'},'mission':'apollo 11'}}");
AbstractXMLStreamReader reader = new BadgerFishXMLStreamReader(object);
Source source = new StAXSource(reader);		
DOMResult result = new DOMResult();
TransformerFactory transFactory = TransformerFactory.newInstance();
Transformer transformer = transFactory.newTransformer();
transformer.transform(source, result);

throw an exception:

Exception in thread "main" javax.xml.transform.TransformerException: java.lang.NullPointerException
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:716)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:313)
at org.ow2.petals.binding.rest.json.test.JSONTest.toXML(JSONTest.java:155)
at org.ow2.petals.binding.rest.json.test.JSONTest.main(JSONTest.java:89)
Caused by: java.lang.NullPointerException
at com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl.setXmlVersion(CoreDocumentImpl.java:856)
at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.setDocumentInfo(SAX2DOM.java:150)
at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.startElement(SAX2DOM.java:160)
at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.closeStartTag(ToXMLSAXHandler.java:204)
at com.sun.org.apache.xml.internal.serializer.ToSAXHandler.flushPending(ToSAXHandler.java:277)
at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.startElement(ToXMLSAXHandler.java:646)
at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.handleStartElement(StAXStream2SAX.java:338)
at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.bridge(StAXStream2SAX.java:164)
at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.parse(StAXStream2SAX.java:120)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:656)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:707)
... 3 more
---------
java.lang.NullPointerException
at com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl.setXmlVersion(CoreDocumentImpl.java:856)
at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.setDocumentInfo(SAX2DOM.java:150)
at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.startElement(SAX2DOM.java:160)
at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.closeStartTag(ToXMLSAXHandler.java:204)
at com.sun.org.apache.xml.internal.serializer.ToSAXHandler.flushPending(ToSAXHandler.java:277)
at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.startElement(ToXMLSAXHandler.java:646)
at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.handleStartElement(StAXStream2SAX.java:338)
at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.bridge(StAXStream2SAX.java:164)
at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.parse(StAXStream2SAX.java:120)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:656)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:707)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:313)
at org.ow2.petals.binding.rest.json.test.JSONTest.toXML(JSONTest.java:155)
at org.ow2.petals.binding.rest.json.test.JSONTest.main(JSONTest.java:89)

If the method getVersion of the class org.codehaus.jettison.AbstractXMLStreamReader is redefined in this way

AbstractXMLStreamReader reader = new BadgerFishXMLStreamReader(object) {
	@Override
	public String getVersion() {
	   return "1.0";
	}
};

it works.

I think it could be a nice improvement to allow parsing JSON to create a DOM document from it (I am conscious that DOM is rather for XML document).