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

From: Armaghan Mahmud <mahmud.armaghan(a)gmail.com&gt; Subject: [rules-users] Lists and enums in Drools To: "Rules Users List" <rules-users(a)lists.jboss.org&gt; Date: Thursday, May 14, 2009, 4:56 AM 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