Add support for Enum with interfaces

[MathieuLorber]

I'm currently working on a big GWT project, and more precisely on a proof of concept to use JSON with Jackson on the server side, gwt-jackson on the front size. The RPC services we try to migrate use complex objects. I tried several libraries, gwt-jackson is the only one to purpose solutions for some difficulties (inheritance with generics, complex map keys...).

But I actually have problems with some enums, which have the particularity to implement interfaces. The current serializer/deserializer for enums are ok with plain simple enums, but do not permit the use of interfaces with JsonTypeInfo annotation, and enums implementing them. I don't think that's a heavy feature, but it would be a great one here =)

[nmorel]

Can you give me an example of what you are trying to do please ?

[MathieuLorber]

You'll find a example in my fork : https://github.com/MathieuLorber/gwt-jackson , project examples/hello (sorry for the formatting...)

[nmorel]

First observations :

• Subtype(De)Serializer only expect AbstractBeanJson(De)Serializer. So it fails when we try to add an EnumJson(De)Serializer.
• Jackson uses As.WRAPPER_ARRAY for enums even if specified otherwise.

[nmorel]

Serialization is now working. I'm gonna try to finish deserialization by tomorrow.

[nmorel]

Well, tomorrow might be now. Jenkins is building the branch. If everything is ok, you will have a snapshot 0.5.1-SNAPSHOT available with the fix soon.

[nmorel]

Snapshot available

[MathieuLorber]

Well it works on my simple sample, I'll try tomorrow on the true-life-project... Thank you for your reactivity !

[MathieuLorber]

It's ok on my larger project =)
(sorry for the response time, I had others problems related to the refactor)

[nmorel]

Ok good news :)
I'll see when I make a new release. I would like to include mix-in annotation support in it.