On Jan 26, 2010, at 10:24 AM, Reto Bachmann-Gmuer wrote:
>
> According to section 3.7.2 when there is no path left after the path
> of the resource class only resource methods but not sub-resource
> method may be selected. I think it would be useful to be able to
> return another object to handle the request also for the root of the
> resource.
>
> For example I would like the following class to delegate any request
> to the instance of WidgetResource returned by WidgetResourceFactory:
>
> @Path("")
> public class WidgetsResource {
>
> @Path("{path:.+}")
> public WidgetResource findWidget(@Context UriInfo uriInfo) {
> return new WidgetResourceFactory.getWidgetResourceByUri(uriInfo.getAbsolutePath())
> }
>
> }
>
Is the problem here that GET / wouldn't call the findWidget method whereas GET /anything/else would ?
> public class WidgetResource {
>
> @GET
> public Widget getDetails() {...}
>
> @PROPFIND
> public Object() {...}
>
> }
>
>
> The concrete use case is that in Apache Clerezza we want to redirect
> to a Resource Class based on the type of the requested resource in an
> underlying RDF model if no regular root resource class could be
> located for the specific path. Currently we are doing this with an
> explicit call back via a non-standard extension[1] of the jax-rs
> implementation, however this is quite odd as for every http method
> (including any extension) we need to add a new resource method to the
> forwarding class.
>
> I think a slight generalisation of the spec could satisfy our needs,
> the minimalist way to achieve this would be to change in section 3.7.2
> 2 (a) "and go to step 3" to "if M is not empty go to step 3".
>
I'm not sure how that would help, if U is empty then it won't match any sub resource methods anyway (unless they used a template like .* I suppose). Did you mean .* in the first example rather than .+ ?
Marc.
> I believe such a change would also be useful in other situations, in
> fact I've been writing constructs like the following several time:
>
> @Path("widgets")
> public class WidgetsResource {
>
> @GET
> public Widget getRootWidget(@Context UriInfo uriInfo) {
> return getWidget(uriInfo);
> }
>
> @GET @Path("{path:.+}")
> public Widget getWidget(@Context UriInfo uriInfo) {...}
> }
>
> It seems awkward to have to write that extra method for when there is
> no path left.
>
> Cheers,
> reto
>
>
> 1. http://svn.apache.org/viewvc/incubator/clerezza/trunk/org.apache.clerezza.parent/org.apache.clerezza.jaxrs.extensions/src/main/java/org/apache/clerezza/jaxrs/extensions/RootResourceExecutor.java?view=markup
>
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