JERSEY-2612 make it possible for custom javax.ws.rs.ext.ParamConverter t...

[nicolasyanncouturier]

...o handle when they are given null values (such as to support java.util.Optional for example)

[jerseyrobot]

Can one of the admins verify this patch?

[mpotociar]

Hi Nicolas, before review your pull request, we need you to sign Oracle Contributor Agreement.

See also more information about contributing to Jersey here:
https://jersey.java.net/scm.html#/Submitting_Patches_and_Contribute_Code

[mpotociar]

Jenkins, please test this patch.

[nicolasyanncouturier]

Hi Marek,

The OCA is signed and sent.
I also rebased this branch on top of the sync'ed fork of master.
Finally, I had a look at the Jenkins build failure (which seems to have disappeared just now), but cannot see that the failure is related to my changes (this test passed locally both on cmdline Maven and within IntelliJ).

On a side note, as I proposed in the JIRA issue comment, I could get rid of the "Optional" thing and rephrase the issue and test so that it does not bring in that "non-spec compliant" example.

[mpotociar]

Jenkins, please retest this patch.

[nicolasyanncouturier]

Seems like the copyrights were making jenkins build fail. Should be fixed now.

[AdamLindenthal]

Jenkins, please retest this patch.