Hi, i have the same requirements. Have you found any solution so far?
Please do let us know the resolution, if you have got it resolved.
We are also facing same issue. Need your help as soon as possible.
Please email the resolution to firstname.lastname@example.org too.
Rabi and Sourabh.
A work-around addressed my needs.
I save the value of interest in @PostLoad and use it in @PreUpdate.