[BUG][jaxrs-jersey][oas3] input with openapi spec v3 results in generated code with v2 annotations

[kingofdisasterr]

Description

usage of the generator with:

-i modules/openapi-generator/src/test/resources/**3_0**/petstore-with-fake-endpoints-models-for-testing.yaml
-o samples/server/petstore/jaxrs-jersey

results in generated code with openapi spec v2 annotations.
i.e. samples/server/petstore/jaxrs-jersey/src/gen/java/org/openapitools/api/AnotherFakeApi.java:

@io.swagger.annotations.Api(description = "the another-fake API")

according to the openapi spec v3 it should result in:

@io.swagger.v3.oas.annotations.OpenAPIDefinition(info = @Info(title= "OpenAPI Petstore", description = "This spec is mainly for testing Petstore server and contains fake endpoints,
    models. Please do not use this for any other purpose. Special characters: "
    \", version = "1.0.0"))

if generating the html-documentation, the resulting yaml doesn't include all the information which was originally specified in the input yaml file.

openapi-generator version

openapi-generator version 3.3.4

OpenAPI declaration file content or url

from file: modules/openapi-generator/src/test/resources/3_0/petstore-with-fake-endpoints-models-for-testing.yaml:

openapi: 3.0.0
info:
  description: >-
    This spec is mainly for testing Petstore server and contains fake endpoints,
    models. Please do not use this for any other purpose. Special characters: "
    \
  version: 1.0.0
  title: OpenAPI Petstore

Steps to reproduce

generate the JavaJaxRS sample

Suggest a fix

one of:

• detection of input spec openapi version
• change the default behavior of -g jaxrs-jersey to generate openapi v3 annotations
• add a new language, i.e. -g jaxrs-jersey-v3
• add a specific java related option like openAPIAnnotations=v3

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[jmini]

This is a duplicate of #27.

I do not think that we need to support OpenAPI v2, but somebody needs to update the templates.