Am I right in thinking that I have to return a Collection from all of my finder 
methods except findByPrimaryKey()?

In the DB I have a users table with a userId and a loginName. Both have unique 
constraints on them, but only the Id is the primary key. 

If I want to create a findByUserName() then does it have to return a collection, out 
of which I must fish the bean?

Or can I do it some other way and return just the one bean? I'm using xdoclet and this 
isn't working:

 * @ejb.finder
  |  *   description="get user by name"
  |  *   signature="org.gargantus.user.UserLocal findByUserName(String name)"
  |  *   query="SELECT OBJECT(u) FROM user AS u WHERE u.userName = ?1"
  | 

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http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3832050#3832050

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