[rules-users] function problem

I'm fairly new to Drools so there may be an easier way to do this. I need to check to see if any one of a list of tags on an object are in another list of tags and am trying to do that with a function. the compiler tells me it can't compile my eval function: #list any import classes here. ** *import* com.cp.services.rules.sources.Person; ** *import* com.cp.services.rules.actions.PersonActions; ** *import* com.cp.rules.TagCodes; ** *import* java.util.List; #declare any global variables here ** *global* com.cp.services.rules.actions.PersonActions personActions; ** *function* *boolean* hasOneOf(List list1, String[] list2){ *for* (Object obj : list1) { String string = (String)obj; *for* (*int* j = 0; j < list2.length; j++) { *if* (string != *null* && string.equals(list2[j])) { *return* *true*; } } } *return* *false*; } ** *rule* "Engineering" *dialect* "mvel" *when* ** #conditions Person( ageInYears >= 18 ) *and* *eval* ( hasOneOf(Person(tagList), TagCodes(engrTags)) ) *then* #actions personActions.addAction("EngineeringGroup"); * end *