Greetings. I am trying to find the correct approach to defining and using Java5 Enum's in Drools constraints. *Psudo code:* Class RuleRequest { ... other attributes ... // RequestType is an enum type. RequestType type ; public RequestType getRequestType() { return type; } } public enum RequestType { INTERNAL("internal"), EXTERNAL("external"); } *Drools Rule:* # 1st Constraint - I could have listed the type in the constraint for RuleRequest but say I want that to be in a separate constraint # 2nd Constraint - on the nested RequestType enum *req: RuleRequest(..some match not based on the RequestType but other attributes of RuleRequest...) type: RequestType( ??? == RequestType.INTERNAL ) from req.requestType * What should be plugged in ??? to be able to match the requestType. Interestingly, if I say *type: RequestType( this == RequestType.INTERNAL ) from req.requestType *when the ruleRequest has an RequestType of INTERNAL, the matching works. But I do not see any examples/reference in the Drools documentation on the usage of "this" in constraints. I saw a posting from Edson T. using this which is why I tried it in the first place. *Question *- What is the expectation for the Enum. Should it have methods (getters) that return the Enum type itself or methods that return the strigified value of the Enum? - What is syntax and usage practices for the usage of the "this" keyword - What really happens when the Drools engine does the == comparison on Enum's. Does it convert to the string value of the enum and then compare that or is there something else in play. I hope I have asked valid questions as I see many questions relating to Enum but maybe a definitive/suggested approach and explanation from the drools dream team may serve as a good reference on this subject. Thanks. - Krishna _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users