Re: Smuggling information to enums

Mark Space <>
Tue, 24 Mar 2009 13:43:49 -0700
Roedy Green wrote:

On Tue, 24 Mar 2009 11:44:54 -0400, Eric Sosman <>
wrote, quoted or indirectly quoted someone who said :

    Perhaps you might try a less colorful and more mundane term
than "smuggling" to explain what you want to do ..

"get" information from the outside world into the enum for its use. It
seems to be doing all it can to prevent me. I was prepared to jump
through some hoops to get a small amount of data in. Hence the term

Why use enums? Enums are constants that don't change. If you are
reading data from the outside world, those aren't really enums.

I'd read the values you need into some custom object then dump the
object into a HashSet (or HashMap). Then you can implement your own
identity semantics on those objects, just like enum does, but with out
the restrictions that makes enums difficult to work with in these

The real question is: what are you actually trying to do here? What
kind of operations do you envision for these objects? Total, not just
the ones you think would be really cool for an enum. Don't forget "read
and write" because apparently that's what messing you up here.

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