I am posting here out of desperation in hope that someone in the EMF community has solved this problem. The issue is not directly related to EMF but rather with the utility FasterXMLJackson.

When I serialize anything EMF using Jackson, it works and life is good. But not so the return trip. This is because for deserialization, Jackson wants a no-arg constructor by default and EMF ain't got one. To solve this, one can use one of Jackson's annotations @JsonCreator and create a "mixin". I did this but still no go. Here's what I have to date:

My mixin, which by all accounts seems correct.

public class PatientMixin {

    @JsonCreator
    public static ForecastPatient createForecastForecastPatient() {
        return ForecastFactory.eINSTANCE.createForecastPatient();
    }
}

Then we have to tell Jackson how to use it.

ObjectMapper mapper = new ObjectMapper();
mapper.addMixIn(ForecastPatient.class, PatientMixin.class);

It doesn't work. I get the same error I would get if I did none of this.

Surely someone has made EMF work with Jackson.

Thanks for your patience.