Should predicate constraints be sensitive to whitespace?? I have the
following rule with a predicate constraint:
rule "test"
when
valObj : MyValuesObject(a:aVal, b:bVal, c:cVal -> ((a.intValue() <
(1/780) * (b.intValue() + c.intValue()) && (b.intValue() + c.intValue()) >
500000)
then
System.out.println("Alert condition met on obj:" + valObj);
end
Inserting whitespace into the predicate results in the following exception:
org.drools.rule.InvalidRulePackage: unknown:155:85 mismatched token:
[@1723,5226:5227='\r\n',<4>,155:85]; expecting type ')'
unknown:156:28 mismatched token: [@1752,5256:5256='(',<23>,156:28];
expecting type ')'
If instead I use an eval on the LHS, I can insert whitespace without an
exception.
In addition, I would like to know if there are any plans to simplify the
syntax for similar types of rules, as the above is extremely unwieldy for
the non-expert.
For instance, I would vastly prefer to write the following:
rule "test"
when
valObj : MyValuesObject(a:aVal, b:bVal, c:cVal)
(a < (1/780)*(b+c))
((b + c) > 500000)
then
System.out.println("Alert condition met on obj:" + valObj);
end
Also, since everything in rules needs to be an Object, is there any plan to
make the operators deal with said Objects? That is, so I do not always have
to de-reference with my eval or predicate objects with intValue() or
floatValue() or whatever?
In our application, the user (i.e. not a drools or java expert) will be
writing the rules. The current syntax requirements for encoding the above
simple rule makes me very nervous about our users ever being able to use the
rules effectively.
Thanks,
Justine