This seems to be a basic concurrency function, but I was having trouble finding any answer to my question elsewhere.

NHibernate V1.2

Consider the following scenario:

I have a smart client which loads a large amount of data, manipulates it in memory, and persists the changes when user interaction is finished.

The user loads object foo in a session

ISession session = NhibernateHelper.GetCurrentSession();
Foo foo = session.Get(typeof(Foo),id);
session.Disconnect();

<time goes by... foo is changed locally>
<call to to persist the changes>

session.Reconnect();

//before updating, check to see if any property of foo has changed in the database
if(foo has changed)
{
notify the user that foo has changed in the database
}
else
{
session.SaveOrUpdate(foo);
}

The current definition of a "stale" object seems to mean a key-property has changed, but I need to see both key and non-key property changes.

How do I check to see if ANY properties of an object have persisted changes before updating?

i track the changes in my persistent object via a 'hasChanges' flag which will be set to true in the setters of my properties. Then i wrote an interceptor which evaluates this flag.

Regards
Klaus

if you can, use the version feature... it's a very nice way to deal with optimistic concurrency