1.3, rel fields and automatically generated keys

Hi
I'm just starting to play with relationship fields and I'm working through the RosterApp example <http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/CMP3.html> trying to apply it to my application.
It says I should define relationship fields like this:
public abstract Collection getTeams();
public abstract void setTeams(Collection teams);But my related table is indexed by an automatically generated primary key which I think we treat as an Object, don't we?
So, should my relationship fields be:
public abstract ProductType getProductType();
public abstract void setProductType(Object ProductType);& if so, what protects me, besides my own skill and intelligence, from trying to setProductType with a String, for example, when what's actually being used for that key is an Integer.
I mean, I guess we'll always setProductType with the results of a finder method or something so maybe I'm pondering about nothing. My question really is, is that the correct way to define a relationship field where the key is automatically generated.
Also, Annie, are you paid by Sun to always be around answering these questions?
Cheers anyway
J

But my related table is indexed by an automatically
generated primary key which I think we treat as an
Object, don't we?http://e-docs.bea.com/wls/docs61/ejb/cmp.html#1066165
The key field must be declared to be of type java.lang.Integer in the abstract `get' and `set' methods of the bean. -- That's what I know for WebLogic. I am not sure about what other app servers do about this.
for example, when what's actually being used
for that key is an Integer.
Also, Annie, are you paid by Sun to always be around
answering these questions? :) Nope, but I get payed for posting on Java forums, since I am short of work and only conduct trainings for newbies joining the company. That's the best way I get to learn, rather than asking questions. And the best part is when I write something wrong and someone hits out at me; helps me a lot. ;)
I hope this one helped you.
***Annie***

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