Kris Nuttycombe wrote:

It's been a few days since this question was asked, and I am also
interested in the answer. I'm currently using an eval to get around
the problem, but is there any way to check enum equivalence directly
in drools?

I beleive it'll work with primitive enums (int), but not enum classes. If you tried it and it doesn't work, probably safe to assume it doesn't support it :)

Mark

Thanks,

Kris

On Wed, Aug 13, 2008 at 2:42 PM, Maxim Veksler <maxim.veksler@gmail.com> wrote:

Hello list,

I have a rule that generally speaking looks like this :

rule "ABC"
when
    $f : FilteringStateConnector($campaignId : campaignId)


    $campaign : Campaign(code == $campaignId
        ,$limitTypeEnum : limitTypeEnum, $limitByEventType :
limitByEventType)


     // Check Budget limit pass conditions:
    (
        eval(BooleanLogging.trace(log,    "DEBUG: " + ($limitTypeEnum ==
ENUM1.BudgetLimitFlag))) and
        eval(BooleanLogging.trace(log,    "DEBUG: Always here, right now"))
and
        eval(BooleanLogging.trace(log,    "DEBUG: " + ($limitByEventType ==
ENUM2._2_EXPOSED))) and

        Campaign(code == $campaignId, limitTypeEnum ==
ENUM1.BudgetLimitFlag, limitByEventType ==  ENUM2._2_EXPOSED) and

        eval(BooleanLogging.trace(log,    "DEBUG: Right here, right now"))

    ) or (
        ...
    )

then
...
end



The line """        eval(BooleanLogging.trace(log,    "DEBUG: " +
($limitTypeEnum == ENUM1.BudgetLimitFlag))) """ evaluates to "true" in the
logs.
The line """        eval(BooleanLogging.trace(log,    "DEBUG: " +
($limitByEventType == ENUM2._2_EXPOSED))) """ as well. These are java (eval)
checks for truth. If I try to use Drools to gain the rete optimization by
writing :
"""        Campaign(code == $campaignId, limitTypeEnum ==
ENUM1.BudgetLimitFlag, limitByEventType ==  ENUM2._2_EXPOSED)  """, It never
reachers past that line. why is that? Can't Drools 3 check for truthness of
Enum conditionals ?


I would love to supply more information if required.



Help is highly appreciated,
Maxim.

--
Cheers,
Maxim Veksler

"Free as in Freedom" - Do u GNU ?

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