Hi!

I

Why are you doing both of these?
session.evict(schema);
session.getSessionFactory().evict(Schema.class, new Long(id));
It looks like an attempt to resolve the "instanceAlreadyLoaded" msg. If the instance is loaded (and that's what is causing the msg, then the first should do the trick.

Does this exception get blown here:
Schema schema = (Schema) session.load(Schema.class, new Long(id));

or here:
(SchemaInfo) session.load(SchemaInfo.class, new Long(id));

The other question I have is why are you using the code this way? In other words, what are you trying to achieve?

My thought on the lightweight pattern was to prevent unnecessary fetching. It looks from your code, that SchemaInfo extends Schema (you're right this is sort of backwards && confusing).

But then you try to load Schema and check to see if it's an instance of SchemaInfo? Since you have polymorphism = explicit, will it *ever* come back as SchemaInfo? I suspect not. (I could be wrong though).

Hi!

I first just tried this.



But that allways throwed an ClassCastException. Then i tried all kinds of diffrent ways to aviod the Exception. The code i posted here was the one i thought would take care of every way it could go wrong.



That is exactly what i want.



Hmm no it wont. Maybe this it what i intended (can