I have a case in my application where I want to map one key to multiple
values. However, I don't want the values to be stored as a List. I would
rather have MultiHashMap store the values in a Set of some kind (HashSet
maybe). It would be nice if I could tell MultiHashMap what kind of
collection to use to store the values. Maybe we could parameterize the
constructor...
public MultiHashMap( Factory factory )
{
}
The factory would be used to create a collection instance each time one is
needed for a new key in the map. Maybe this is overkill and we could just
give it a Class instance and it can call newInstance() on that. Anyway,
that would allow MultiHashMap to return any kind of collection, not just
Lists. Of course, I could just create a new Set using the returned List,
but that's a lot of objects to create. What do you guys think?
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