[rules-users] Mvel autoboxing math
Joe White
Joe.White at recondotech.com
Fri Aug 15 01:32:54 EDT 2008
The drl test case below illustrates a problem with math inside of drools
when using the mvel dialect. When using autoboxing the order of
operations (and parens) are not respected. This is using drools 5.0M1
and mvel-2.0-dp4.jar. The correct answer is 80 and the answer provided
with autoboxing in the mvel dialect is 100.
I'm uncertain of how to create a viable test case in pure mvel to add it
to their jira. Any help is appreciated,
Thanks,
Joe
package test;
dialect "mvel"
rule "TestRule"
when
then
double value=(2*new Double("50"))-10-10;
System.out.println(value);
double valueTwo=(2*50)-10-10;
System.out.println(valueTwo);
End
RESULTS
Wrong = 100.0
Right = 80.0
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