Can an arbitrary object be marshalled with JAXB?

Is it possible to marshall an arbitrary Java object with JAXB?
I would think this is possible if
(i) marshalling works on non-public fields
(ii) xml can handle all Java primitive types, including byte[]
And, it it is possible, how would you unmarshall it?
bw

I don't believe it is possible for JAXB to marshal and un-marshal an arbitrary object. Your object would need to implement the MarshallableObject. Usually with JAXB you wouldn't actually create the MarshallableObject yourself, you would just create it from your binding schema and DTD.

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