How does hibernate detect which changed objects to persist?

v1dyerthy · **Posted:** Mon Dec 19, 2005 6:00 am

Hello all,

Just a simple question. How does hibernate figure out which objects changed in a collection and then just persist those changed object inside collection.

ReneStolp · **Posted:** Wed Dec 28, 2005 6:36 am

Hi!

I found that an interesting question, which I could not answer. But I found by accident a post in this thread:

http://forum.hibernate.org/viewtopic.php?p=2283471#2283471

where the author states

vilarneto wrote:

[...]This is expected, as stated everywhere: Hibernate detects changes in values by comparison, not by object identity (unless the property is a collection, which is not the case). There's even an example in Hibernate in Action, p. 74, where a getter returns new instances of Strings.

All the best,

René