JAXB: Unmarshalling of xml Strings

For my diploma-thesis I need to unmarshall a xml-string. In principle this is no problem, but the xml-string represents a JAXB-Entity that is not annotated with @XmlRootElement. This causes an exception during unmarshalling. Nevertheless you can unmarshall xml using JAXBElement-class.

private YourClass unmarshallFromString(String s) throws JAXBException {
{
    JAXBElement<YourClass> ret = null;
    JAXBContext jaxbCtx = JAXBContext.newInstance(YourClass.class.getPackage().getName());
    Unmarshaller unmarshaller = jaxbCtx.createUnmarshaller();
    //Throw exception if problems occur during parsing
    unmarshaller.setEventHandler(new ValidationEventHandler() {
       public boolean handleEvent(ValidationEvent event) {
         throw new RuntimeException(event.getMessage(), event.getLinkedException());
       }
    });
    Source src = new StreamSource(new StringReader(s));
    ret = unmarshaller.unmarshal(src, EventSources.class);
    return (YourClass) ret.getValue();
}