Options to provide OData/REST services

Hi all,

While developing my web application on the Cloud Platform, I need to provide OData/REST services.

I am not looking towards options like NW Gateway and the likes.

I'd like to expose logic/persistence features existing on the cloud Java EE server.

Therefore, I am investigating options.

I found this very interesting blog on how ODATA services can be exposed: the solution is based on odata4j

Another options is SAP's own ODATA library described here

Any experience on how this two technologies compare?

Also any additional option would be very interesting.

Thanks, regards

Vincenzo