On Tue, Apr 29, 2008 at 08:55:02AM -0600, Arul Dhesiaseelan wrote:
> Hi Jakub,
>
> Thanks for helping me out. This solution works great for me. I am using
> Jersey 0.7. I have a related question about custom resolvers.
Great.
>
> What if I have multiple resources and how do I register custom JAXB
> context resolver specific to a resource?
I am afraid the resolver is scoped to the whole application.
If you want resource specific serialization, you would need
to use different JAXB beans for different resources.
Another approach would be to introduce custom MessageBodyReaders/Writers.
Then instead of producing/consuming directly JAXB beans, you can deal with
kind of wrappers, via which you can share serialization configuration
between resource and appropriate reader/writer.
~Jakub
>
> Cheers,
> Arul
>
> Jakub Podlesak wrote:
> >Hi Arul,
> >
> >please look for a solution in line...
> >
> >On Mon, Apr 28, 2008 at 06:46:23PM -0600, Arul Dhesiaseelan wrote:
> >
> >>Hi,
> >>
> >>I would like to customize JSON rendering in Jersey. Here is my resource
> >>class and associated JAXB classes.
> >>
> >>CustomerResource.java
> >>
> >>@Singleton
> >>@Path("/customers")
> >>public class CustomerResource {
> >>
> >>private static Map<Long, Customer> customers = new
> >>ConcurrentHashMap<Long, Customer>();
> >>
> >> @GET @Path("/list")
> >> @ProduceMime({"application/json"})
> >> public Customers getCustomers() throws IOException {
> >> Customers c = new Customers();
> >> c.setCustomers(customers.values());
> >> return c;
> >> }
> >>
> >>}
> >>Customers.java
> >>
> >>@XmlRootElement
> >>public class Customers {
> >> private Collection<Customer> customers;
> >>
> >> public Collection<Customer> getCustomers() {
> >> return customers;
> >> }
> >>
> >> public void setCustomers(Collection<Customer> c) {
> >> this.customers = c;
> >> }
> >>}
> >>
> >>Customer.java
> >>@XmlRootElement(name = "customer")
> >>public class Customer {
> >> private Long id;
> >> private String name;
> >>//getters and setters
> >>}
> >>
> >>When I access the "/customers/list" URL, I get the following JSON
> >>response.
> >>
> >>{"customers":{"customers":[{"id":"2","name":"Test2"},{"id":"1","name":"Test1"}]}}
> >>
> >>I am not sure why the customers tag is listed twice. I would like to
> >>generate something like
> >>
> >
> >that is because the original xml (JAXB generated) looks like:
> >
> ><customers><customers><id>2</id2><name>Test2</name></customers>...
> >^^^
> >the first <customers/> element corresponds to Customers.class
> >while the second one corresponds to Customers#customers collection
> >
> >It is probably a regression, because the very first (wrapping) element
> >should
> >be stripped off by default. Which Jersey build do you use?
> >
> >
> >>{"customers":[{"id":"2","name":"Test2"},{"id":"1","name":"Test1"}]}
> >>
> >>How do I customize JSON rendering in Jersey?
> >>
> >
> >You will need to implement your custom JAXB context resolver. In your case
> >not only due to the above mentioned regression, but also to deal with
> >one-element customer collections (see [1] for details).
> >
> >Your resolver could look like (did not test it):
> >
> > @Provider
> > public class JAXBContextResolver implements
> > ContextResolver<JAXBContext> {
> >
> > private JAXBContext context;
> > private Class[] types = {Customers.class, Customer.class};
> >
> > public JAXBContextResolver() throws Exception {
> > Map props = new HashMap<String, Object>();
> > props.put(JSONJAXBContext.JSON_NOTATION, "MAPPED");
> > props.put(JSONJAXBContext.JSON_ROOT_UNWRAPPING, Boolean.TRUE);
> > props.put(JSONJAXBContext.JSON_ARRAYS, "[\"customers\"]");
> > this.context = new JSONJAXBContext(types, props);
> > }
> >
> > public JAXBContext getContext(Class<?> objectType) {
> > return (types[0].equals(objectType) ||
> > types[1].equals(objectType)) ? context : null;
> > }
> > }
> >
> >HTH,
> >
> >~Jakub
> >
> >[1]http://blogs.sun.com/japod/entry/missing_brackets_at_json_one
> >
> >
> >>Please clarify.
> >>
> >>Thank you,
> >>Arul
> >>
> >>
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