Serializing with JAXB and the Any

Question

I have a schema that defines the following type:

Answer 1

Make use of Object Factory for mashelling the object like below you no need to have @XmlRootElement in DemoType.java .,

DemoType demoServiceRequest = new DemoType();
ObjectFactory obDemo = new ObjectFactory();  
Request requestObject = new Request();     
requestObject.setAny(obDemo.createDemo(demoServiceRequest));

And add DemoType class at Request.java like @XmlSeeAlso({DemoType.class})