JDO doesn't support collections of collections, maps of collections,
etc. An easy workaround is to define a class that contains a
List<String>, like this:
public class StringList {
List<String> list;
// ctors, List<String> delegate methods, etc
}
Then your #1 becomes List<StringList>. For #2, you could define
public class StringListList {
List<StringList> list;
// ctors, List<StringList> delegate methods, etc
}
and then use Map<StringListList,String>.
-matthew
On Fri, May 25, 2012 at 7:25 PM, Gang Liu <gangliu...@yahoo.com> wrote:
> Hi,
>
> I have 2 use cases and hope someone can give some ideas:
>
> #1 how to write mapping file if a member variable in a class is
> List<List<String>>
> #2. how to write mapping file if a member variable in a class is
> Map<List<List<String>>,String>
>
> thanks
>
> Tim
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