There is a JAXB method equivalent to @PostConstruct. The method:
void afterUnmarshal(Unmarshaller umarshaller, Object parent) is going to be called by the
Umarshaller after the class is instantiated and the contents reconstructed.
There is no further configuration, annotation or interface implementation required.
See you at Java EE Workshops at MUC Airport or on demand and in a location very near you: airhacks.io!