On 10/11/2009 15:39, Paul Sandoz wrote:
> On Nov 10, 2009, at 4:05 PM, gerard davison wrote:
>
>> but I am not sure it would be required if the interface is properly
>> generic).
>>
>
> Agreed it should not be required. But GenericEntity can still be
> useful if T = Object.
Can you give an example of this? Won't most cases work with just a cast
as you already know the type for a generic entity.
>
>
>>>
>>> Unfortunately it is too late to make changes to JAX-RS 1.1. I could
>>> add something to Jersey in the interim.
>>
>> Damm, I figured as much. Do I need to raise this as an issue for this
>> for the next release.
>
> Please do.
Done.
>
>
>> I guess I am going to have to wait until 2.x for this. As to a
>> workaround, it would be useful the WADL issue, I guess it could as
>> simple as a generic subtype of these classes. I guess I will log
>> that with the root issue which stated this discussion, hopefully I
>> will have this done in a few days.
>>
>
> I can add support for GResponse<T> and GResponseBuilder<T> in Jersey.
> Ideally i would like those to inherit from Response and
> ResponseBuilder but i am not sure that is possible because of method
> ambiguity. Given that the simplest thing is to duplicate the
> functionality and enable Response to be created from GResponse.
In order for this to work in the WADL case the build method needs to
return GResponse<T> so it can be used in the interface of the class.
Covariant return types should make it possible to create a subclass of
ResponseBuilder that returns a more specific type.
Cheers,
Gerard
>
> Paul.
>
>> Cheers,
>>
>> Gerard
>>
>>>
>>> Paul.
>>>
>>>
>>> public class Main {
>>>
>>> public static class Response<T> {
>>>
>>> private final T entity;
>>>
>>> private Response(T entity) {
>>> this.entity = entity;
>>> }
>>>
>>> public T getEntity() {
>>> return entity;
>>> }
>>>
>>> public static class ResponseBuilder<T> {
>>> private T entity;
>>>
>>> public ResponseBuilder<T> entity(T entity) {
>>> this.entity = entity;
>>> return this;
>>> }
>>>
>>> public Response<T> build() {
>>> return new Response<T>(entity);
>>> }
>>>
>>> static protected <T> ResponseBuilder<T> newInstance() {
>>> return
>>> RuntimeDelegate.getInstance().<T>createResponseBuilder();
>>> }
>>> }
>>>
>>> static public <T> ResponseBuilder<T> start() {
>>> return new ResponseBuilder<T>();
>>> }
>>>
>>> }
>>>
>>> public static class RuntimeDelegate {
>>> public static RuntimeDelegate getInstance() {
>>> return new RuntimeDelegate();
>>> }
>>>
>>> public <T> Response.ResponseBuilder<T> createResponseBuilder() {
>>> return new Response.ResponseBuilder<T>();
>>> }
>>> }
>>>
>>> /**
>>> * @param args the command line arguments
>>> */
>>> public static void main(String[] args) {
>>> Response<String> r =
>>> Response.<String>start().entity("xx").build();
>>>
>>> String e = r.getEntity();
>>> System.out.println(e);
>>> }
>>> }
>>>
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>>
>> --
>> Gerard Davison | Senior Principal Software Engineer | +44 118 924 5095
>> Oracle JDeveloper Web Service Tooling Development
>> Oracle Corporation UK Ltd is a company incorporated in England & Wales.
>> Company Reg. No. 1782505.
>> Reg. office: Oracle Parkway, Thames Valley Park, Reading RG6 1RA.
>>
>> Blog http://kingsfleet.blogspot.com
>>
>>
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>>
>
--
Gerard Davison | Senior Principal Software Engineer | +44 118 924 5095
Oracle JDeveloper Web Service Tooling Development
Oracle Corporation UK Ltd is a company incorporated in England & Wales.
Company Reg. No. 1782505.
Reg. office: Oracle Parkway, Thames Valley Park, Reading RG6 1RA.
Blog http://kingsfleet.blogspot.com