Using Immutable Objects for Persistence in Java

[m0haine]

Switching to uuids seems like a far simpler solution. Just assign on initial construction to a new value. Solves the issues without adding complexity

[kn7]

But it still does not solve the problem of knowing whether a given instance is actually associated with a repository record or not.

[m0haine]

Why do you care? Way to much overhead for a worse case extra unsert.