Carsten Hammer since you seem to like bringing this up on every AttributeConverter-related Jira you come across, I guess I'll reply on each of those as well

What you suggest is very difficult given just the AttributeConverter contract as defined by JPA. I have already listed the reasons for you in the other Jira(s). Seeing as how this is so important to you, I am sure we will see a contribution in this area from you very soon. I look forward to reviewing it.