Support compact serialization of Link, deserialization

[xenoterracide]

serialization of a Link seems too detailed. I realize that I can write a customer serializer, but I think that the default should be simpler like the uri, rel, title and type, and imho only if the values aren't null, certainly the attached uriBuilder should not have been included in the json output.

"link":{"uri":"http://127.0.0.1:8080/NornLM/activities/d1039a2c-e939-4f84-a790-9d8304fe62d2","uriBuilder":{"host":"127.0.0.1","scheme":"http","port":8080,"userInfo":null,"path":"/NornLM/activities/d1039a2c-e939-4f84-a790-9d8304fe62d2","query":null,"fragment":null,"pathParamNamesInDeclarationOrder":[]},"rel":"item","rels":["item"],"title":null,"params":{"rel":"item"},"type":null}

migrated from jackson-core#135

[cowtowncoder]

Hmmh. Not quite sure where/how to do this: this is a JAX-RS type, so core jackson-databind can not support it. But perhaps JAX-RS providers could add JAX-RS type support module, if there are other similar types that need special handling.

[cowtowncoder]

Another thing to note is that Link is for JAX-RS 2.0, not 1.1. Not sure if we can yet drop 1.x support?

[cowtowncoder]

Ok. Since we are very close to 2.7 release, I will postpone this for Jackson 2.8, to allow for discussion on JAX-RS 2.0. I suspect upgrade is fine, but due to potential compatibility issues do not want to push this quite yet.

I will actually add a skeletal version of datatype module, but will not connect it to be pushed as an artifact.

[Dichotomia]

Any news about this functionality?

[cowtowncoder]

@Dichotomia I haven't had time to work on this, although I did add datatypes within repository.
If anyone has time to help that'd be great; otherwise I will eventually get to this. 2.8 itself is still at least a month out, but getting this done early would help it be included in the first RC,

[cowtowncoder]

Datatype module added under datatypes/, Maven coordinates:

  <groupId>com.fasterxml.jackson.datatype</groupId>
  <artifactId>jackson-datatype-jaxrs</artifactId>

and module class name Jaxrs2TypesModule.

Note that for now no attempt is made to auto-register since I don't trust I can ensure all ObjectMapper instances would be configured. But users typically have to choose other datatype modules as well so it should not be big deal.

It would also make sense to see what other JAX-RS 2 datatypes should be supported.

[Dichotomia]

Good job!