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 <[email protected]> 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 > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/use-a-boolean-returned-type-function-in-when-doesn-t-work-why-tp4026339.html > Sent from the Drools: User forum mailing list archive at Nabble.com. > > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list [email protected] https://lists.jboss.org/mailman/listinfo/rules-users
