Re: [rules-users] Lists and enums in Drools

The list that might contain the value of type is alphaList, not $test, which is the reference to the object containing the list as a field. -W 2009/5/14 Armaghan Mahmud <mahmud.armaghan(a)gmail.com&gt; > Hi, > > I need help with constructing rules for my scenario. > > I started off by creating enum values in the main java file and comparing > them with the rules to get different responses for different enum values. > That was easy. > > This time, I'm constructing a list of enum values and passing them into > the rules engine as well. I would like to configure my rules in such a way > that when they look for the different enum values, they should also look in > the list to test if the enum value passed into the rules engine is a member > of the list or not. My old rules looked like this: > > rule "Testing for Alpha" > salience 100 > when > alpha : AlphaWrapperClass(type == Class.ALPHA) > then > System.out.println("Found Alpha"); > alpha.isFound(true); > end > > I tweaked the above rule to : > > rule "Testing for Alpha" > salience 100 > when > $test: AlphaEnumCollectionsWrapperClass(alphaList : alphaList) > alpha : AlphaWrapperClass(type == Class.ALPHA && $test contains type ) > then > System.out.println("Found Loudspeaker Equipment. Who wants to jam > that? Must resist... Jamming sequence in progress... "); > materiel.setJam(true); > end > > But I'm seeing the following error: > > org.drools.rule.InvalidRulePackage: Unable to create Field Extractor for > '$test' of '[ClassObjectType classAlphaEnumCollectionsWrapperClass]' in rule > "Testing for Alpha": [Rule name=Testing for Alpha, agendaGroup=MAIN, > salience=100, no-loop=false] > > I'd greatly appreciate your help. > > Thanks, > Armaghan > > > _______________________________________________ > 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