RE: [rules-users] LHS Conditional Syntax for drl - date comparisonwith objects

Wonderful! Thanks very much for your learned response. Java syntax, then, is more reserved for the right hand side of the rule, which makes sense, else we would see semi-colons in the LHS. Thanks again! Robert Costello Lead Systems Engineer IMA Performance E3- 279A 847.286.0910 -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Scott Reed Sent: Monday, July 14, 2008 10:02 AM To: Rules Users List Subject: Re: [rules-users] LHS Conditional Syntax for drl - date comparisonwith objects Oops, try this: rule "Your First Rule" when Date1( $end1: endDate ) Date2( beginDate > $end1 ) then #actions System.out.println("do something"); end Scott Reed wrote: Try this: rule "Your First Rule" when $d1 : Date1( $end1: endDate ) $d2 : Date2() $d2 : Date2( beginDate > $end1 ) then #actions System.out.println("do something"); end Costello, Robert wrote: I'm having a hard time understanding the syntax in the conditional or left hand side of the DRL. Is it acceptable to use dot notation in the LHS? Is there a better way to compare fields on different objects? In the example below, I get an error "Unable to find class $d1. What limitations are there syntactically on the left hand side? Any help would be greatly appreciated. I have looked at all the examples and have googled the problem and don't seem to find the answer. package com.rules #list any import classes here. import com.validate.Date1 import com.validate.Date2 import java.util.Date #declare any global variables here rule "Your First Rule" when $d1 : Date1() $d2 : Date2() $d2 : Date2(beginDate > $d1.getEndDate) then #actions System.out.println("do something"); end Best regards, Robert Costello ________________________________ _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users