JsonSubTypes doesn't work with mixin

[Konstantin Klimov]

Dear jackson community,

I'm trying to use @JsonTypeInfo  and @JsonSubTypes I in a mixin to create polymorphic type mapping for third-party classes. But it looks like the annotations do not work with mixin. Could anybody please drop a hint how to deal with it or find a workaround? 

class Animal { }

class Cat extends Animal { }

@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
@JsonSubTypes({@JsonSubTypes.Type(value = Cat.class, name = "cat")})
abstract class SubTypesMixin { }


@Test
public void mixinsShouldWorkWithSubtypesAnnotations() throws IOException {
  // given
  String json = "{\"type\":\"cat\"}";
  ObjectMapper objectMapper = new ObjectMapper();
  objectMapper.addMixIn(Animal.class, SubTypesMixin.class);

  // when
  Animal animal = new ObjectMapper()
      .readerFor(Animal.class)
      .readValue(json);

  // then
  assertEquals(animal.getClass(), Cat.class);
}

Thank you in advance,

Regards

[Tatu Saloranta]

I see this was files as

https://github.com/FasterXML/jackson-databind/issues/2379

and the comment there is that I think your code has flaw -- you are
configuring an `ObjectMapper` correctly, but then for some reason
using a fresh new unconfigured one for operation. That would explain
the problem?

-+ Tatu +-