[rules-users] Question about Drools accessing a global HashMap and comparing it to an object value

MyObj is a Java object that contains: String state; String code; public void addError(String message); myObjList is an ArrayList<MyObj> containing from 2 to 20,000 objects state2CodeMap is a HashMap<String, ArrayList<String>> containing an entry for each US state. The associated ArrayList contains a minimum of 1 entry, up to 200 entries. I need to create a rule that checks all of the MyObj objects in myObjList, gets the appropriate ArrayList from state2CodeMap based on myObj.state and then if myObj.code not memberOf $codeList, run the "then" portion of the rule. I have created about 60 fairly simple rules, that are working just fine, but this one is a little too complex for me to userstand how to write it in Drools. Looking at this page ( http://blog.athico.com/2007/06/chained-from-accumulate-collect.html http://blog.athico.com/2007/06/chained-from-accumulate-collect.html ), I can see that nested "from" seems to be supported, but the page seems to be for Drools 4. Plus, I have had to teach myself Drools in the past week. I could really use some help with this. Any assistance is greatly appreciated! Mike V. global List myObjList; global HashMap state2CodeMap; # this rule is working just fine! rule "Check for null State" when $objs : ArrayList() from collect(MyObj(state == null || state == "") from myObjList) then for (MyObj myObj : (ArrayList<MyObj>)$objs) { myObj.addError("State must have a value"); } end # I really have no idea how to write this rule rule "Check for valid code" when $objs : ArrayList() from collect(MyObj()) then for (MyObj myObj : (ArrayList<MyObj>)$objs) { myObj.addError("Code is not valid for the State"); } end -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Question-about-Drools... Sent from the Drools - User mailing list archive at Nabble.com.