[rules-users] How to handle generics in Drools?

[Geoffrey De Smet]

Java's generics are implemented by erasure,
which implies that there no information available at runtime that a 
instance of a List is of a certain generic type, for example Boost.
So I don't think this is possible.

Note that some things do work in erasure IIRC, like the generic type of 
a defined field in a class is available at runtime:
public class Foo {
   private List<Bar> list;
}
but that's not useful in this case :)

Op 17-10-11 11:30, Martin A schreef:
> Hello,
>
> In my rules file I'd like to set something like this:
>
> rule "mayThrowDice"
>     when
>         $user : User($gp : gameplay)
>         $gameplay(this == $gp)
>     then
>         exists List<Boost>() {
>             ..... some business logic
>         }
> end
>
> But it looks like there is no generics support. How can I make sure 
> there is a List of type Boost inserted into the session?
>
> Thank you,
> Martin
>
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users

-- 
With kind regards,
Geoffrey De Smet

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