Additional test

[bojanv55]

additional test for case when deserializing object reference. One of them works after applying my fix. other still doesn't work since there is additional nested Class.

[cowtowncoder]

I can have a look at test failures first. I think you may have found a valid problem wrt access, but it needs to be solved bit differently (this is done when collecting properties, and only if allowed by configuration).

[cowtowncoder]

With a quick look at failing test, I am not sure it should work: problem being that languageId reference is to Lang, but Object Id info is only enabled for LanguageId subtype. As such, deserializer has no expectation of Object Id being included. But serializer does see LanguageId type, and assumes Object Is required.

Inclusion of Object Id could in theory be prevented by using declaration like:

        @JsonSerialize(typing=JsonSerialize.Typing.STATIC)
        public Lang getLanguageId() {
            return languageId;
        }

which forces serializer to use static (declared) type for serialization; but unfortunately interface Lang does not contain enough information for serialization to succeed.

So I think the solution here would be to use JsonIdentityInfo in Lang. Object Id system is not designed to support subtypes that may or may not have Object Id.

[cowtowncoder]

Part of suggested fixes make sense, and are included in #881 fix (cast problem; delegating of 'getCreatorIndex()'). But as I said earlier, I do not think the main part of the fix is correct for general case.

[cowtowncoder]

As per my earlier comments, I think fixes that are merged (related to casts) are good; but that the test is unfortunately not valid as it assumes automatic casting from super-types, but without type information being available.