Hello; forgive me for what might be an easily-answered question (though I
did not find such an answer in the specification).
Is there a way, from within a MessageBodyWriter implementation, to toss
control back to the default, Jersey-provided MessageBodyWriters?
My broader question: I would like to have my resource class return an
object, say, a Foo. I then need to wrap that Foo inside another kind of
object, Bar, whose sole purpose is to augment the response payload with
metadata (such as number of records returned, the original request URI,
etc. I don't want to pollute Foo with this information. Nor, ideally, do I
want to pollute my resource class with this kind of information, as Bar is
really there only to support a particular kind of caller.
My thought was, write a MessageBodyWriter that takes in a Foo, wraps it in a
Bar, and then--and here's my question--hands control back to Jersey to say,
here, pretend you got a Bar back instead and go marshal it in the normal way
you ordinarily would.
What's the best approach to use here? I'm looking, I guess, for the
equivalent of a servlet Filter in the JAX-RS world.
One approach that occurs to me is, within my MessageBodyWriter, to take in
the Foo, wrap it in a Bar, and then call the JAXB marshaling logic myself:
get a Marshaller and marshal the Bar to the MessageBodyWriter's
OutputStream. But I'd rather not own this process myself.
Thanks for any pointers on this subject; I'm happy to do more reading if
there is more to be done!
Best,
Laird