The days list property needs to be a Collection (at the moment I think it uses the collection semantics in java, which sadly arrays are not part of the collections family). You can do Arrays.asList() to convert it to a list in the getter method, and it should work. If you however make it a hashset, it in theory will be slightly faster then most other collection types.

On Sat, Sep 27, 2008 at 2:04 AM, Marcin Krol <mrkafk(a)gmail.com&gt; wrote: > Hello everyone, > > I'm a beginner in Drools, so please account for that. :-) > > How do I use memberOf operator when working with collections? Depending on a > day of week, I want to check if a day is a working day or weekend day. > > I tried this: > > package com.sample > dialect "mvel" > import com.sample.ThermostatTimeData; > import com.sample.Thermostat.WorkDay; > import com.sample.Thermostat.WorkDays; > > > rule "Rule 1" > > when > $wd : WorkDays() > $ttd : ThermostatTimeData( day memberOf $wd.daylist ) > //$ttd: ThermostatTimeData ( day == "Monday" || day == "Tuesday" || > day == "Wednesday" || day == "Thursday" || day == "Friday" ) > > then > insert( new WorkDay() ); > System.out.println("inserting new workday"); > end > > > with this in my Thermostat class: > > public static class WorkDays { > private String[] dl = {"Monday", "Tuesday", "Wednesday", "Thursday", > "Friday"}; > > public WorkDays() { > } > > public String[] getDaylist() { > return this.dl; > } > } > > > Now the above rule works fine when I select days using the regular fact > field selection in Drools: > > $ttd: ThermostatTimeData ( day == "Monday" || day == "Tuesday" || day == > "Wednesday" || day == "Thursday" || day == "Friday" > > However, when I try to access WorkDays.dl or WorkDays.daylist(), the rule > doesn't fire (the program output is empty). > > Regards, > MK > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users >