HKosova thank you for the suggestion, I have applied the changes to the schemas as follows:
Fish:
type: object
required:
[depth]
properties:
depth:
type: integer
Dog:
type: object
required:
[country]
properties:
country:
type: string But the errors results the same when calling the endpoint of the newly generated JAX-RS server
dirosden unfortunately not, this is still an issue in the Swagger code generator for JAX-RS: https://github.com/swagger-api/swagger-codegen/issues/10520
Meanwhile, I have also tried to OpenAPI code generators but it turned out that a they have a different issue: https://github.com/OpenAPITools/openapi-generator/issues/7256
But I was able to implement the missing classes manually and with that workaround I am able to use oneOf with JAX-RS
