[rules-users] How to use type-safe enums in rule condition

[Wolfgang Laun]

Just curiosity.

On 13/11/2013, Steven Williams <stevearoonie at gmail.com> wrote:
> I use something like the following in rules to good effect:
>
> Country( this == Country.USA )

Granted, you can add any number of attributes to an enum so that it's
just another way of writing a static set of bean objects. But is there
a "good effect" to be had from a pattern that merely ascertains the
presence of an enum instance
in the Working Memory?

Other than this, a pattern like
   City( country == Country.USA )
doesn't require the insertion of the Country enums.

Cheers
Wolfgang