How to detect EJB object property changes in @PreUpdate?

Question

when saving (updating) an object that you call EntityManager.persist (entity) , passing the complete object. Can be intercepted using @PreUpdate .

Does anyone have a recipe on how to determine which properties were changed in this interceptor method? Somehow comparing the old and the new object? It is even better to implement a general method instead of comparing fields by field for each class.

Thanks for any input!

Sven

Answer 1

, persist() (insert) . , , .

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