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Allowd values

 
Greenhorn
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Hello Java experts

For application there are some cross cutting requirements in area of Alloed values .
1. List of allowed values for a drop down.
2. Core value to system value conversion.
3. Possible values for an edit control.
4. Allowed values keyed by other values . For example list of states keyed by country.
and so on .

These are pretty common problems and I have not seen any pattern or open source implementation around this .

Can you guys share your thoughts on this ? Are there any patterns ? Are there any open source implementation to address this issue ?

Thanks
Sunil
 
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Not sure there's any special need for an open source implementation of a List (or in your "keyed" case, a Map of Lists). Do you see something here that's more profound than that?
 
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