Yes you are probably correct. Would you be willing to try your hand at fixing this and contributing? https://github.com/hibernate/hibernate-orm/blob/master/CONTRIBUTING.md

We are in the process of redoing all this low-level mapping code which is to be the basis of Hibernate 5.0. We are redoing it all because the code had quite a few design flaws (over reliance on untyped strings being one).

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