Question

Do you always need an ObjectFactory class when using JAXB?

Without it I get this exception:

javax.xml.bind.JAXBException:
“com.a.b.c”
doesnt contain ObjectFactory.class or
jaxb.index

I gather the ObjectFactory can be overkill. But given this exception I’m guessing you need it.. but not sure why?

Answer 1

You get that exception when you use the JAXBContext.newInstance(String) factory method, where you pass in the package name as the argument. This does require the ObjectFactory to be there, otherwise, JAXB doesn’t know which classes to process.

If you don’t have an ObjectFactory, you need to JAXBContext.newInstance(Class...) instead, passing in the explicit list of annotated classes to add to the context.