Re: [rules-users] Temporal rules in decision table

As you have Level with a field date, you can access that point in time in milliseconds, using getTimeInMillis(). For the current time, you might insert an object of class Current with a member now of class Calendar. rule closest when Current( $now: now ) $level: Level( $value == 2, $date: date ) not $x: Level( Math.abs( $x.getDate().getTimeInMillis() - $now.getTimeInMillis() ) < Math.abs( $date.getTimeInMillis() - $now.getTimeInMillis() ) ) then // $level is the Level fact closest to Current with a level of 2 end Untested. If the long expression gives you trouble, try enclosing it in eval(...). -W On 11 March 2014 18:14, JChrist <io.christod(a)gmail.com&gt; wrote: > Hello everyone, > I was messing with drools v6.0.1.Final the past week and I have not been > able to completely understand how to integrate the rule engine to my > specification. > > For the needs of my project, I want to regularly insert some data in the > engine, similar to the following: > class Level { double value;Calendar date; } > this class contains some values at specific time points (both in the past > and in the future). > > I would like to be able create a decision table based on the "current" > time > (plus or minus a variable offset) and the value of the closest Level to > that > time point. > > For example, assuming it is '2014-11-03 19:10:00' and the level objects in > the session currently are: > '1.0 2014-11-03 18:00:00' and '2.0 2014-11-03 19:00:00', > > I would want a rule to say that if current level value is 2.0 then do some > stuff and it would make a match. > > I would really appreciate any help on how to overcome this issue, as well > as > any good examples/tutorials regarding this. > > Kind regards. > > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/Temporal-rules-in-decision-table-tp4028... > Sent from the Drools: User forum mailing list archive at Nabble.com. > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users