Jersey can produce List<T> but cannot Response.ok(List<T>).build()?

It is possible to embed a List<T> in a Response the following way:

@Path("/stock")public class StockResource {    @GET    @Produces(MediaType.APPLICATION_JSON)    public Response get() {        Stock stock = new Stock();        stock.setQuantity(3);        GenericEntity<List<Stock>> entity =             new GenericEntity<List<Stock>>(Lists.newArrayList(stock)) {};        return Response.ok(entity).build();    }}

The client have to use the following lines to get the List<T>:

public List<Stock> getStockList() {    WebResource resource = Client.create().resource(server.uri());    ClientResponse clientResponse =        resource.path("stock")        .type(MediaType.APPLICATION_JSON)        .get(ClientResponse.class);    return clientResponse.getEntity(new GenericType<List<Stock>>() {    });}

For some reason the GenericType fix wasn't working from me. However, since type erasure is done for Collections but not for Arrays, this worked.

    @GET    @Produces(MediaType.APPLICATION_XML)    public Response getEvents(){        List<Event> events = eventService.getAll();        return Response.ok(events.toArray(new Event[events.size()])).build();    }

my solution for methods that use AsyncResponse

@GET@Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})public void list(@Suspended        final AsyncResponse asyncResponse) {    asyncResponse.setTimeout(10, TimeUnit.SECONDS);    executorService.submit(() -> {        List<Product> res = super.listProducts();        Product[] arr = res.toArray(new Product[res.size()]);        asyncResponse.resume(arr);    });}