Femke De Backere wrote:Sorry that's not quite true, if you use an EVAL thats pure MVEL a cast should work inside of that, as evals are like black boxes to the rule engine and they are executed directly by java or mvel depending on the dialect you chose.Another question ;),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.
Can I perform a cast in MVEL? eg. Patient((ShortSedation) sedation.sedation24 == false)
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/trunk/target/docs/drools-expert/html/ch07.html#RuleLanguage-ConditionalElements
[]s
Edson
2009/3/17 Femke De Backere <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@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@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 doubleWhat am I doing wrong?Thx,Femke
rules-users mailing list
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
_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
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
_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users