[rules-users] use a boolean returned type function in "when", doesn't work, why?

[Wolfgang Laun]

Read the section on the "Conditional Element eval" in the Expert
manual (and more of the same manual, especially Chapter 4,  Rule
Language Reference).

-W

On 11/10/2013, merry0900 <m1e1r1r1y at 163.com> wrote:
>
> my drl file like this：
> import ********
> function boolean isNotNull(String a){
> if(a!=null){
> return true;}
> return false;
> }.
> rule a
> when
>         isNotNull("aaaa");
> then
>        // mycode
> end
>
> how i could use like this， thank you  all
>
>
>
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