Java Jersey2 Server Stubs: basePath is ignored

I use a swagger 2.0 input file to generate Java server stubs and have the basePath property defined. However, in the generated *Api.java files, I would expect that the defined basePath would be prepended to the @Path annotation of the class.

For example:

{
  "swagger": "2.0",
  "info": {
    "title": "Simple API overview",
    "version": "v2"
  },
  "basePath": "/basePath",
  "paths": {
    "/v2": {
      "get": {
        "operationId": "getVersionDetailsv2",
        "summary": "Show API version details",
        "produces": [
          "application/json"
        ],
        "responses": {
          "200": {
            "description": "200 203 response",
            "examples": {
              "application/json": "{\n    \"version\": {\n        \"status\": \"CURRENT\",\n        \"updated\": \"2011-01-21T11:33:21Z\",\n        \"media-types\": [\n            {\n                \"base\": \"application/xml\",\n                \"type\": \"application/vnd.openstack.compute+xml;version=2\"\n            },\n            {\n                \"base\": \"application/json\",\n                \"type\": \"application/vnd.openstack.compute+json;version=2\"\n            }\n        ],\n        \"id\": \"v2.0\",\n        \"links\": [\n            {\n                \"href\": \"http://127.0.0.1:8774/v2/\",\n                \"rel\": \"self\"\n            },\n            {\n                \"href\": \"http://docs.openstack.org/api/openstack-compute/2/os-compute-devguide-2.pdf\",\n                \"type\": \"application/pdf\",\n                \"rel\": \"describedby\"\n            },\n            {\n                \"href\": \"http://docs.openstack.org/api/openstack-compute/2/wadl/os-compute-2.wadl\",\n                \"type\": \"application/vnd.sun.wadl+xml\",\n                \"rel\": \"describedby\"\n            },\n            {\n              \"href\": \"http://docs.openstack.org/api/openstack-compute/2/wadl/os-compute-2.wadl\",\n              \"type\": \"application/vnd.sun.wadl+xml\",\n              \"rel\": \"describedby\"\n            }\n        ]\n    }\n}"
            }
          },
          "203": {
            "description": "200 203 response",
            "examples": {
              "application/json": "{\n    \"version\": {\n        \"status\": \"CURRENT\",\n        \"updated\": \"2011-01-21T11:33:21Z\",\n        \"media-types\": [\n            {\n                \"base\": \"application/xml\",\n                \"type\": \"application/vnd.openstack.compute+xml;version=2\"\n            },\n            {\n                \"base\": \"application/json\",\n                \"type\": \"application/vnd.openstack.compute+json;version=2\"\n            }\n        ],\n        \"id\": \"v2.0\",\n        \"links\": [\n            {\n                \"href\": \"http://23.253.228.211:8774/v2/\",\n                \"rel\": \"self\"\n            },\n            {\n                \"href\": \"http://docs.openstack.org/api/openstack-compute/2/os-compute-devguide-2.pdf\",\n                \"type\": \"application/pdf\",\n                \"rel\": \"describedby\"\n            },\n            {\n                \"href\": \"http://docs.openstack.org/api/openstack-compute/2/wadl/os-compute-2.wadl\",\n                \"type\": \"application/vnd.sun.wadl+xml\",\n                \"rel\": \"describedby\"\n            }\n        ]\n    }\n}"
            }
          }
        }
      }
    }
  },
  "consumes": [
    "application/json"
  ]
}

Produces the following V2Api.java

package Test

import io.swagger.annotations.ApiParam;
import io.swagger.jaxrs.*;


import java.util.Map;
import java.util.List;

import java.io.InputStream;

import org.glassfish.jersey.media.multipart.FormDataContentDisposition;
import org.glassfish.jersey.media.multipart.FormDataParam;

import javax.servlet.ServletConfig;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.SecurityContext;
import javax.ws.rs.*;
import javax.validation.constraints.*;

@Path("/v2")
@Consumes({ "application/json" })

@io.swagger.annotations.Api(description = "the v2 API")
@javax.annotation.Generated(value = "io.swagger.codegen.languages.JavaJerseyServerCodegen", date = "2019-11-01T12:41:52.331+01:00")
public class V2Api  {
   private final V2ApiService delegate;

   public V2Api(@Context ServletConfig servletContext) {
      V2ApiService delegate = null;

      if (servletContext != null) {
         String implClass = servletContext.getInitParameter("V2Api.implementation");
         if (implClass != null && !"".equals(implClass.trim())) {
            try {
               delegate = (V2ApiService) Class.forName(implClass).newInstance();
            } catch (Exception e) {
               throw new RuntimeException(e);
            }
         } 
      }

      if (delegate == null) {
         delegate = V2ApiServiceFactory.getV2Api();
      }

      this.delegate = delegate;
   }

    @GET
    
    @Consumes({ "application/json" })
    @Produces({ "application/json" })
    @io.swagger.annotations.ApiOperation(value = "Show API version details", notes = "", response = Void.class, tags={  })
    @io.swagger.annotations.ApiResponses(value = { 
        @io.swagger.annotations.ApiResponse(code = 200, message = "200 203 response", response = Void.class),
        
        @io.swagger.annotations.ApiResponse(code = 203, message = "200 203 response", response = Void.class) })
    public Response getVersionDetailsv2(@Context SecurityContext securityContext)
    throws NotFoundException {
        return delegate.getVersionDetailsv2(securityContext);
    }
}

I would expect the path of the class in the generated V2Api.java to be @Path("/basePath/v2")

Start by tracing JavaJerseyServerCodegen and the template that produces V2Api.java, using the generated @Path("/v2") output as the entry point. Verify how the Swagger 2.0 basePath is handled, then confirm that generated API classes include /basePath before the operation path.