OpenAPI Generator spring-boot and delegatePattern

Question

I am using the OpenAPI generator to generate the server side implementation for spring-boot starting from an OAI specification.

I noticed that with the configuration that I was using, the generator was not using the delegate pattern in the controller. For example, a controller looked like:

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.context.request.NativeWebRequest;
import java.util.Optional;

@Controller
@RequestMapping("${openapi.someresourceLibrary.base-path:/some-resource/v1}")
public class SomeResourcesApiController implements SomeResourcesApi {

    private final NativeWebRequest request;

    @org.springframework.beans.factory.annotation.Autowired
    public SomeResourcesApiController(NativeWebRequest request) {
        this.request = request;
    }

    @Override
    public Optional<NativeWebRequest> getRequest() {
        return Optional.ofNullable(request);
    }

}

I know that I can, in my pom.xml file, set the configuration delegatePattern to true to enable the use of the delegate pattern.

I am wondering if someone knows why by default the tool is not using the delegate pattern that seems the most natural for this use case.

If I decide to use the default pattern, how am I supposed to provide my implementation? Should I extend the controller ?