Lack of configuration option in ‘Swagger Gradle Plugin’, which allows to specify discriminator and discriminator mapping

Currently, to the best of my knowledge, there is no configuration option in ‘Swagger Gradle Plugin’ (https://github.com/swagger-api/swagger-core/blob/master/modules/swagger-gradle-plugin/README.md), which allows to specify discriminator and discriminator mapping – required in models with class inheritance. E.g. in models based on the ‘GeoJSON’ standard (https://geojson.org/), Swagger does not have sufficient information on how to map Geometry sub-types such as Point, LineString, Polygon, etc.

I do realize Swagger Annotations can be used in such cases to add discriminator and discriminator-mapping, but our model code is generated off EMF Ecore, therefore we cannot include any custom annotations as these would get overwritten on each build; see https://github.com/eclipse-emf/org.eclipse.emf/issues/27 for more details.

Start with the Swagger Gradle Plugin README and its existing configuration options. Determine how discriminator and discriminator-mapping settings should be exposed for inherited models such as GeoJSON Geometry sub-types, and consider the EMF-generated model constraint; done means the plugin documents and supports configuring both values without requiring custom annotations.