Hi Markus,
For the specific case of TreeSet it is possible to support with JAXB  
you just need to convert the TreeSet instance to a JAXB bean that  
supports the table header and table rows mechanism you require. But i  
suspect that is not the answer you want to hear :-) It might also be  
possible to extend JAXB to be smarter about how it encoded basic  
collection data types, but i am not an expert in this area.
I think for the general cases of collections/arrays/tables you would  
need to utilize a specific JSON library to get want you want and  
integrate that library with a message body writer.
Paul.
On Apr 1, 2009, at 4:07 PM, Markus Kohler wrote:
> Hi,
> I wonder whether it's possible in Jersey to efficiently encode  
> homogeneous collections/arrays/tables.
>
> Using JSON  such a "table" will encoded like this (Iused a TreeSet):
>
> "jobs":[{"name":"sample0.doc","status":"printing...","pages":"0"}, 
> {"name":"sample1.doc","status":"printing...","pages":"1 "}, 
> {"name":"sample10.doc","status":"printing...","pages":"10"}, 
> {"name":"sample11 .doc","status":"printing...","pages":"11"}, 
> {"name":"sample12.doc","status":"prin ting...","pages":"12"}, 
> {"name":"sample13.doc","status":"printing...","pages":"13 "}, 
> {"name":"sample14.doc","status":"printing...","pages":"14"}, 
> {"name":"sample15 .doc","status":"printing...","pages":"15"}, 
> {"name":"sample16.doc","status":"prin ting...","pages":"16"}, 
> {"name":"sample17.doc","status":"printing...","pages":"17 "}, 
> {"name":"sample18.doc","status":"printing...","pages":"18"}, 
> {"name":"sample19 .doc","status":"printing...","pages":"19"}, 
> {"name":"sample2.doc","status":"print ing...","pages":"2"}, 
> {"name":"sample20.doc","status":"printing...","pages":"20"} , 
> {"name":"sample21.doc","status":"printing...","pages":"21"}, 
> {"name":"sample22.d oc","status":"printing...","pages":"22"}, 
> {"name":"sample23.doc","status":"printi
>
>
>
> It's obviously unnecessary to repeat all those "name" and "status"  
> Strings.
>
> Because I want to show this data in a simple table, it should also  
> be possible to encode it like this:
>
> "jobs":["header":["name","status","pages"], 
> ["sample0.doc","printing...","0"],  
> ["sample1.doc","printing...","1"] ...
>
> Please forgive me if the syntax is not completely correct, I'm not a  
> Javascript expert. I still think you get the idea.
>
> I can imagine that since Jersey also supports XML and uses JAXB that  
> there would be limitations of would could be done.
>  Actually it seems to me that with XML you can get only close to  
> JSON encoding.
>
> Has anyone here already solved this kind of problem?
>
>
>
> Regards,
> Markus