I couldn't find an answer to my question on the net (maybe I did not search well enough, since I am still a novice on this).
Could anyone tell me if Jackson and Gson implement the standard Json JSR-353 (so I can write a standard code) and @Runtime one of the implementation would be used by the application server (including his one).
This link has a reply (apparently by the Jackson founder), and it essentially says that Jackson doesn't implement the JSR: http://jackson-users.ning.com/forum/topics/future-of-jackson-java-8-jsr-353
Google didn't (couldn't?) vote on the JSR (https://www.jcp.org/en/jsr/results?id=5486), and I couldn't find anything on Gson's roadmap (https://sites.google.com/site/gson/gson-roadmap) either to suggest that they'd want to comply.