Hello Lee,
looks like JAXB issue, I recreated your testcase and following code:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
JAXBContext context =
JAXBContext.newInstance(GenericResponse.class, Product.class);
Marshaller m = context.createMarshaller();
Unmarshaller u = context.createUnmarshaller();
m.marshal(response, baos);
System.out.println(baos.toByteArray());
ByteArrayInputStream bais = new
ByteArrayInputStream(baos.toByteArray());
Object o = u.unmarshal(bais);
GenericResponse<Product> unmarshallResult =
(GenericResponse<Product>)o;
System.out.println(unmarshallResult);
returns:
GenericResponse{total=150, page=1, limit=10, data=[]}
you might want to ask at jaxb_at_users.java.net instead..
Regards,
Pavel
On 01/25/2011 03:39 PM, rocklee wrote:
> Hi all,
>
> I'm new to jersey and just created a Generic response wrapper as following:
>
> @XmlRootElement(name = "response")
> @XmlAccessorType(XmlAccessType.FIELD)
> @XmlType(propOrder = {"page", "limit", "total", "data"})
> public class GenericResponse<T> implements Serializable {
> private static final long serialVersionUID = -3971806944073145864L;
>
> /**
> * Total amount of items available
> */
> private long total;
>
> /**
> * The page of the list to display
> */
> private long page;
>
> /**
> * The limit of return items
> */
> private long limit;
>
> @XmlAnyElement
> @XmlElementWrapper(name = "data")
> private List<T> data;
> }
>
> So that I can return paginated pojo elements like Customer, Product etc
> using this wrapper as following:
>
> @Path("/products")
> public class ProductResource {
> @Autowired
> ProductDAO productDAO;
>
> @GET
> @Produces( { MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
> public GenericResponse<Product> getProducts(
> @DefaultValue("") @QueryParam("q") String q,
> @DefaultValue("1") @QueryParam("page") int page,
> @DefaultValue("10") @QueryParam("limit") int limit) {
> GenericResponse<Product> response = new GenericResponse<Product>();
> response.setTotal(150);
> response.setLimit(limit);
> response.setPage(page);
> response.setData(productDAO.getProducts(q, page, limit));
> return response;
> }
> }
>
> This can generate xml and json response well, but when I try to consume the
> resource using the code like following, it can fetch total, limit and page
> successfully, but the data is always empty.
>
> ClientConfig config = new DefaultClientConfig();
> Client client = Client.create(config);
> WebResource service = client.resource(getBaseURI());
> GenericResponse<Product> response = new GenericResponse<Product>();
> response =
> service.path("products").accept(MediaType.APPLICATION_XML).get(response.getClass());
>
> // works well
> System.out.println(response.getLimit());
>
> // always empty
> for (Product product : response.getData()) {
> System.out.println(product.getTitle());
> }
>
> I have been struggling with the problem, not sure where I'm doing wrong,
> please help me or give some suggestions. Thanks a lot.
>
> Lee
>