Since you are using default typing, this is how things work -- why would
you not expect type information?
Perhaps you could share your object model and explain why you think typing
should not affect contents the way it does.
-+ Tatu +-
ps. In future when asking questions about "why does X happen" it is useful
to include information about your settings -- at least non-default ones.
Default typing is not one of default settings and while commonly used it
is probably not enabled by majority of users.
On Fri, Aug 11, 2017 at 5:51 AM, Grigoriy Marakov <marakovgrigo...@gmail.com
> wrote:
> Hello everyone! I have a problem with serialization via Jackson.
> When i do JsonNode smth = readValueToTree(obj) I get information about
> class type (e.g. java.Math.BigInteger, java.lang.ArrayList). This problem
> pop up for entities contains Map<String, Object> without any serializer.
> Also in entity which is not full filled. E.g. I have class ContactMethod
> which contains several fields. If all information is present then problem
> goes away. But if filled only one field with id (type bigInteger) then i
> catch class type info:
> Expected:
>
> "contactMethods": [
> "@type": "PhoneNumber",
> "id": "9148293419813662646",
>
> Actual:
>
> "contactMethods": ["java.util.ArrayList",
> "@type": "PhoneNumber",
> "id": "9148293419813662646"
>
> Another example (with map serialization):
> My class have chars (Map<String, Object>). Expected, that when I'll
> serialize it I'll get:
>
> "chars": { "char": [ 1 ] },
>
> but actual I get:
>
> "chars": {"char": ["java.math.BigInteger", 1]}
>
> Anyone knows why it happens? Thanks
>
>
> I got the answer like:
>
> From symptoms it looks like you have enabled "default typing" (there are
> multiple methods in ObjectMapper to do that), which forces inclusion of
> type information similar to what happens when you use @JsonTypeInfo
> annotation.
> You will want to disable this setting, or use explicit @JsonTypeInfo(use
> = Id.NONE) to disable polymorphic handling for specific field(s).
>
>
> But, I have enabled "default typing" and @jsontypeinfo(use = Id.CLASS), I
> need it in the other reasons.
>
> This problem appears strangely:
>
> [image: problem]
>
> Birthday and contactMethods are located under contacts.
> But if contactMethods is located in the first level like contacts - all is
> ok
>
> [image: problem2]
>
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