What about if I provide a "more specific" match for JAX-RS (as follows)? Will
it be smart enough to pick this instead of the sub-resource?
@GET
@Path("{ids}")
@Produces(MediaType.APPLICATION_XML)
public String selectThemes(@PathParam("ids") String ids,
@QueryParam("select") String select)
I would then discard the "select" String and use "ids" instead.
Gili
Gili wrote:
>
>
> Here are some real URIs I have mapped.
>
> POST /themes to create an image theme (a theme is like a category)
>
> GET /themes/{id} to retrieve the theme state
>
> GET /themes/{id};{id};{id}?select=randomImages to select random images
> from a set of image themes
>
> In other words, /theme/{id} might return the theme name whereas
> /theme/1;2;3?select=randomImages would generate a set of all the images
> that fall under themes 1, 2 and 3 then return X random images from that
> pool.
>
> Here is what I currently have:
>
> @Path("themes")
> class ThemesResource
> {
> /**
> * Returns the Theme sub-resource.
> */
> @Path("id")
> public ThemeResource locateTheme(@PathParam("id") long id);
> }
>
> and now I want to add:
>
> /**
> * Returns the Theme sub-resource.
> */
> @Path("id")
> public String selectRandomImages(@PathParam("id") String listOfIds);
>
> I don't think that @Path("{images: [\d,]+"} would help because
> locateTheme is supposed to match exactly one id so there would be an
> overlap. In fact, "/themes/5?select=randomImages" is perfectly legal and
> should not return a sub-resource.
>
> Gili
>
> Paul Sandoz (via Nabble) wrote:
>>
>> On Nov 11, 2008, at 7:31 PM, Gili wrote:
>>
>> >
>> > Sorry, I forgot to mention... For:
>> >
>> > http://example.com/images/1;2;5?select=random
>> >
>> > I already have a sub-resource that matches @Path("{id}").
>>
>> For what path segment the image ids "1;2;5" ?
>>
>> > This means that I
>> > want one method returning a sub-resource (the "Image" resource), and
>> > another
>> > method returning an XML document (the list of random images). In other
>> > words, the method return-type varies based on the query string.
>> >
>> > Is there a way for me to configure JAX-RS to pick the right method
>> > somehow?
>> > What do you recommend?
>> >
>>
>> I recommend you use a comma separated list of image ids as it works
>> better for path matching. You could have "random" as part of the path
>> too:
>>
>> @Path("{images: [\d,]+"}
>> public class ImagesResource {
>> @PathParam("images") IntegerList images;
>>
>> @Path("random")
>> @GET
>> public ... get() {
>> }
>>
>> @GET
>> }
>>
>> If you use a query parameter then you have to do some checking of the
>> values yourself.
>>
>> It would help me if you could present some code of how you are
>> componentizing things as i might be able to help you better. Or break
>> down and present the different URIs you want to support.
>>
>> Paul.
>>
>> > Thanks,
>> > Gili
>> >
>> >
>> >
>> > Gili wrote:
>> >>
>> >> Paul,
>> >>
>> >> Does @Path ignore query arguments? If I want to parse for:
>> >>
>> >> http://example.com/images/1;2;5?select=random
>> >>
>> >> Can I use the following?
>> >>
>> >> @Path("{id}?select=random")
>> >>
>> >> or would I be forced to use a single method and fork execution myself
>> >> based on the query arguments?
>> >>
>> >> Thanks,
>> >> Gili
>> >>
>> >>
>> >> Paul Sandoz wrote:
>> >>>
>> >>>
>> >>> On Nov 10, 2008, at 10:40 PM, Gili wrote:
>> >>>
>> >>>>
>> >>>>
>> >>>> Paul Sandoz wrote:
>> >>>>>
>> >>>>> A better use would be:
>> >>>>>
>> >>>>> http://example.com/images;1;2;5/tags
>> >>>>>
>> >>>>> as then the matrix parameters are associated with a named path
>> >>>>> segment. Matrix parameters are ignored when path matching. The
>> >>>>> best
>> >>>>> way to think about them is as query parameters scoped to a path
>> >>>>> segment.
>> >>>>>
>> >>>>
>> >>>> I don't understand how the above would work. Are you saying that
>> >>>> "images"
>> >>>> would have 3 matrix parameters: 1, 2 and 5?
>> >>>
>> >>> Yes, specifically there are three matrix parameter names, each of
>> >>> which has no value.
>> >>>
>> >>>
>> >>>> Paul Sandoz wrote:
>> >>>
>> >>>>>
>> >>>>> If you are using the path segment matching approach you could do:
>> >>>>>
>> >>>>> @GET_at_Path("images/{id: <regex for digits and commas>}/tags")
>> >>>>> public ... get(@PathParam("id") ImageList images) { ... }
>> >>>>>
>> >>>>> and the class ImageList has a string constructor that parses the
>> >>>>> comma
>> >>>>> separated list of names (see the Sparklines sample [1]).
>> >>>>>
>> >>>>
>> >>>> Okay, I just wanted to get back a List<Integer>. I guess I could
>> >>>> code this
>> >>>> up myself.
>> >>>
>> >>> You could only do that with @MatrixParam (or @QueryParam) if you
>> >>> have
>> >>> one or more matrix parameters with the same name. You can use the
>> >>> following class for any @*Param value:
>> >>>
>> >>> public class IntegerList extends ArrayList<Integer> {
>> >>> public IntegerList(String s) {
>> >>> super();
>> >>>
>> >>> for (String v : s.split(",")) {
>> >>> try {
>> >>> add(Integer.parseInt(v.trim()));
>> >>> } catch (Exception ex) {
>> >>> throw new WebApplicationException(400);
>> >>> }
>> >>> }
>> >>> if (isEmpty())
>> >>> throw new WebApplicationException(400);
>> >>> }
>> >>> }
>> >>>
>> >>> Paul.
>> >>>
>> >>>
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>> >>>
>> >>
>> >>
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