[rules-users] How to write constraint about a Map inside a Map?

Suppouse I have a Map attribute and one of the values is another Map...how can I check a member of the inner Map? class MyFact{ Map map; public MyFact(){ this.map = new HashMap(); } ....setter and getter... } -- test -- MyFact myFact = new MyFact(); Map innerMap = new HashMap(); innerMap.put("innerKey", new String("InnerValue")); Map map = new HashMap(); map.put("mapKey", innerMap); myFact.setMap(map); .... set the RuleBase and insert myFact as a fact for the WorkingMemory... ------- Now... how should I write the rule to check the innerKey ?? rule "test InnerMap" when $mf: MyFact( map['mapKey']['innerKey'] == "InnerValue" ) // doesnt work... .... $mf: MyFact( map['mapKey'].this['innerKey'] == "InnerValue" ) // doesnt work... $mf: MyFact( map['mapKey'].['innerKey'] == "InnerValue" ) // doesnt work... $mf: MyFact( $innerMap: map['mapKey'], $innerMap['innerKey'] == "InnerValue" ) // doesnt work... $mf: MyFact( $innerMap: map['mapKey'] -> ($innerMap ['innerKey'] == "InnerValue" )) // doesnt work... Thanks. Felipe Piccolini M. felipe.piccolini(a)bluesoft.cl