Best widget for modifying a (hash)map?

I've got this data that requires user input. The data is in the form of a map indexed by an ID:

Map<Integer, DataBean> dataBeans;

What might be the best way to expose this on the client size to allow the user to add/modify the data?

I was thinking perhaps I can transform the data somehow to become a array instead, with the ID as an attribute and use a listgrid.

But if there's a better, more natural way to modify maps, I'm all ears. Thanks!