Re: [Resteasy-developers] Connected resources

[Bill B. <bb...@re...>]

In your provider you can inject an HttpHeader field.  From that you can 
obtain UriInfo, from that a UriBuilder that allows you to build URIs.

@Provider
public class UserAttributeXmlSerializer {

   @Context HttpHeaders headers;

...

}




Ian Butcher wrote:
> One of the features of RESTful web services described in the ORA book 
> "RESTful Web Services" is that of hypermedia connections in resource 
> representations.   I can't find a way (although I'm very new to it) in 
> JAX-RS or resteasy to put a link to another resource in my 
> representation.  /Is there a way to get the URL of another resource 
> inside of resteasy?/
> 
> Example:
> 
> I have a system that is a glorified keystore.  A user is referenced by 
> GUID, the key part of the keystore has a name.  The value can be either 
> a simple scalar type (int, long, string, etc) or an array of them.
> 
> My resources would look something like:
> 
> @Path("/attributes/{key}/{definition}")
> public class KeyResource{}
> 
> 
> @Path("/attributes/{userguid}/{key}")
> public class UserKeyResource{}
> 
> @Provider
> @ProduceMime("text/xml")
> public class UserAttributeXmlSerializer implements MessageBodyReader, 
> MessageBodyWriter {
> 
> public void writeTo(Object o, Class aClass, Type type, Annotation[] 
> annotations, MediaType mediaType,
>         MultivaluedMap multivaluedMap, OutputStream outputStream)
>         throws IOException, WebApplicationException {
>         
>         // build representation of the 'values' part of the UserKey resource
> ...
> 
>       // now I want to add a link to the key resource.  This allows the 
> client to find out what scalar type or array this value represents
>       // *there is where I'd really like to be able to get the actual 
> URL for a given 'key' resource*
> ...
>     }
> 
> }
> 
> So the representation that I want to send to the client looks like this:
> 
> <keyvalue>
>   <values>
>     <value>123</value>
>   </values>
>   <key>http://somehost/somecontext/atributes/somekey</key>
> </keyvalue>
> 
> Any ideas or answers greatly appreciated.
> 
> Thanks,
> 
> Ian.
> 
> 
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-- 
Bill Burke
JBoss, a division of Red Hat
http://bill.burkecentral.com