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From "Patrick Linskey" <>
Subject RE: Are relation sets identity, pk or bean.equals() based?
Date Thu, 14 Dec 2006 01:05:29 GMT
> > If you declare the field to be an interface type and you don't
> > initialize the field to anything, I don't remember how we 
> decide what
> > impl to use.
> Looking at the code in, it appears that we  
> default to ArrayList for fields declared as type Collection, HashSet  
> for fields declared as type Set, TreeSet for fields declared as type  
> SortedSet, and ArrayList for fields declared as type List.

So presumably if you declare a field type other than one of the JDK
collection interfaces, you must either declare using the impl class or
provide a default setting in the declaration (or hook into

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