Re: [rules-users] MVEL expression

Femke De Backere wrote: > Another question ;), > > Can I perform a cast in MVEL? eg. Patient((ShortSedation) > sedation.sedation24 == *false*) the LHS "when" is not MVEL, it's DRL Pattern language, it's just that some things we translate to MVEL for execution. Our pattner language does not support casting, no. However MVEL itself does support casting, and you can do that on a RHS "then" which is full MVEL.

Mark > > Thx > > Op 17-mrt-09, om 19:27 heeft Edson Tirelli het volgende geschreven: > >> >> Although Drools makes extensive usage of MVEL, it is always >> embedded in the DRL language. So, it is Drools that defines that a >> field constraint is always a field accessor in the left with one or >> more restrictions in the right. >> >> We need to find a way to make the Drools x MVEL relationship more >> clear because it is not the first time this slight confusion is made. >> >> Anyway, docs are being updated, but take a look at the Pattern >> documentation (item 7.8.2.1): >> >> https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/t... >> >> []s >> Edson >> >> >> >> 2009/3/17 Femke De Backere <femmyke(a)gmail.com >> <mailto:femmyke@gmail.com>> >> >> Thx! >> >> Do you know where I could find a tutorial of MVEL in Drools, >> because I looked at some MVEL tutorials yesterday and I didn't >> find the solution... >> >> 2009/3/17 Edson Tirelli <tirelli(a)post.com >> <mailto:tirelli@post.com>> >> >> >> Left side of a constraint should always be a field >> name... no expression allowed. Either move the expression to >> the right side or use eval. >> >> Patient( sedation.ultiva > ( 0.1 - 0.02 ) ) >> >> Or even better: >> >> Patient(sedation.ultiva > 0.08) >> >> []s >> Edson >> >> 2009/3/16 Femke De Backere <femmyke(a)gmail.com >> <mailto:femmyke@gmail.com>> >> >> Hi, >> >> The following expression keeps returning the >> error [112,32]: [ERR 103] Line 112:32 no viable >> alternative at input '+' in rule >> "RuleFlow-Split-masterproef.ruleflows.shortsedation-18-22" >> in pattern Patient: >> Patient(sedation.ultiva+0.02 > 0.1) >> with sedation.ultiva returning a double >> What am I doing wrong? >> Thx, >> Femke >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> <mailto:rules-users@lists.jboss.org> >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> >> -- >> Edson Tirelli >> JBoss Drools Core Development >> JBoss, a division of Red Hat @ www.jboss.com >> <http://www.jboss.com> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> >> -- >> Edson Tirelli >> JBoss Drools Core Development >> JBoss, a division of Red Hat @ www.jboss.com <http://www.jboss.com> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> >> https://lists.jboss.org/mailman/listinfo/rules-users > > ------------------------------------------------------------------------ > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users >