[Java] Polymorphism - need to list all subclasses twice

When using polymorphic model classes, I end up having to list all subclasses twice on the abstract superclass, if I want to use custom names for the subclasses. Once using

@ApiModel(value = "Super", subTypes = {Sub1.class, Sub2.class, ...}, discriminator = "type")

and once using

@JsonTypeInfo(use=JsonTypeInfo.Id.NAME, include=JsonTypeInfo.As.PROPERTY, property="type")
@JsonSubTypes({
        @JsonSubTypes.Type(value = Sub1.class, name = "sub1"),
        @JsonSubTypes.Type(value = Sub2.class, name = "sub2")
)}

Without the json annotations, things don't (de)serialize correctly, and without the swagger ones, the generated swagger spec and derived client libraries are incorrect.

Feature request: Have swagger-codegen just use the Json annotations, if the swagger ones aren't present. In fact, I see no need for the Swagger annotations, given that things will not (de)serialize correctly without the Json ones.

Start by locating swagger-codegen's Java annotation handling and the path that produces the Swagger specification and client libraries. Compare how JsonTypeInfo and JsonSubTypes are represented when Swagger annotations are absent; done means custom subclass names are reused without duplicating Swagger annotations and the generated outputs remain correct.