Fixed HttpResponse type is generated even when multiple valid response types are defined.

[Ciwi]

Setup

When defining an endpoint

/multiresponse/:
parameters:
- $ref: '#/components/parameters/some_parameter'
get:
operationId: getMultiResponse
responses:
200:
	$ref: '#/components/responses/VariantAVO'
300:
	$ref: '#/components/responses/VariantBVO'
400:
	$ref: '#/components/responses/BadRequest'
401:
	$ref: '#/components/responses/Unauthorized'
403:
	$ref: '#/components/responses/NotAllowed'
404:
	$ref: '#/components/responses/NotFound'

the generated sources for the API will be defined like this:

@io.micronaut.http.annotation.Get("/multiresponse/")
@io.micronaut.http.annotation.Produces("application/json")
io.micronaut.http.HttpResponse<VariantAVO> getMultiResponse(
...

even if the endpoint could also return VariantBVO.
When trying to retrieve VariantBVO from a response like this:

Optional<VariantBVO> optionalVariant = response.getBody(VariantBVO.class);

optionalVariant is empty event when HTTP status code 300 was returned.

When removing the defined type from the generated method like this:

io.micronaut.http.HttpResponse getMultiResponse(

the response correctly contains an instance of VariantBVO.

Versions

micronaut => 1.3.7
micronaut-openapi-codegen => 0.11.0

Suggested solution

Remove the generic type for HttpResponse from generated API when an endpoint could return multiple (different) response types.