As Greg eludes to the default "min" accumulate function expects (java.lang.)Numbers.
If you require one to handle dates you can write your own custom Accumulate Function. On 24 March 2011 17:50, Greg Barton <[email protected]> wrote: > That's because a java.util.Date is not a java.lang.Number. :) You can get > the long value behind the Date by calling Date.getTime(), though. Try that. > > --- On Thu, 3/24/11, jkrupka <[email protected]> wrote: > > > From: jkrupka <[email protected]> > > Subject: [rules-users] accumulate min over java.util.Date > > To: [email protected] > > Date: Thursday, March 24, 2011, 12:07 PM > > Should I be able to do an accumulate > > min over java.util.Date objects? Like > > this: > > $minDate : Date() from accumulate(MyFact ($startDate : > > startDate), > > > > min($startDate)) > > > > I would have thought so, but when I try it, I'm getting: > > > > Caused by: java.lang.ClassCastException: java.util.Date > > cannot be cast to > > java.lang.Number > > at > > > org.drools.base.accumulators.MinAccumulateFunction.accumulate(MinAccumulateFunction.java:76) > > > > > > > > If it should work, then it's possible I'm doing something > > else wrong, but > > everything looks correct to me. I can always work > > around it by getting the > > milliseconds from the Date object and doing the min over > > that... it's just > > not as clean looking. > > > > -- > > View this message in context: > http://drools-java-rules-engine.46999.n3.nabble.com/accumulate-min-over-java-util-Date-tp2726081p2726081.html > > Sent from the Drools - User mailing list archive at > > Nabble.com. > > _______________________________________________ > > rules-users mailing list > > [email protected] > > https://lists.jboss.org/mailman/listinfo/rules-users > > > > > > > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users >
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