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

[Stephen Masters]

That rule would work if you added a “name” property to Country.

As a general tip on working with countries, always work with their ISO codes, not their names.

http://en.wikipedia.org/wiki/ISO_3166-1

… ideally the 2-char codes, which are much more commonly used than the 3-char codes.

Feel free to steal this:
https://github.com/gratiartis/sctrcd-payment-validation-web/blob/master/src/main/java/com/sctrcd/payments/enums/CountryEnum.java

… which sets up all countries with ISO codes and full-text names as enums. Or at least all countries which were included in the ISO spec at the time of writing.

Grab it while you can - I’m in the middle of refactoring it into a JPA entity. :)

Steve


On 12 Nov 2013, at 10:20, droolster <quant.coder at gmail.com> wrote:

> Hello,
> 
> I would like to use type-safe enums in my rules. At the moment I have
> situation like this:
> 
> public class Country {
>    private String name;
> 
>    // getter/setters
> }
> 
> rule "Country"
>    when 
>        Country ( name == "USA" )
>    then
>        DO SOMETHING
> end
> 
> I would like to have something like this:
> 
> public enum Country {
>    USA ()
>    // list of all countries in the world
> }
> 
> and in the rule I would like to do this:
> 
> rule "Country"
>    when 
>        Country ( name == Country.USA )
>    then
>        DO SOMETHING
> end
> 
> Is that possible?
> 
> Thanks in advance for your help.
> 
> 
> 
> 
> 
> 
> --
> View this message in context: http://drools.46999.n3.nabble.com/How-to-use-type-safe-enums-in-rule-condition-tp4026739.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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