Re: [rules-users] Finding matching values in composite constraint

Suppose we have a Transaction object with a String field. Users want to create a rule through our application that says alert me whenever the value of that field contains a value in a list of values provided in the rule. It's easy enough to write this type of rule and send an alert; however, it would be helpful to include the value from the list that matched. The only way I can think to do this type of thing is to create a function somewhere that checks if the field contains any of the values in the user list and if so return that value. Then call that function in the rule condition and bind the result. Something like what follows: public class ExternalMatcher { public static String contains(String field, String...list) { // return the first string that satisfies the contains logic or null if no strings succeed } } rule "test" when Transaction( $matchedValue : ExternalMatcher.contains(field, "value1", "value2", "value3") != null) then sendAlert("I found a transaction that matched your criteria because field foo equals: " + $matchedValue); end -- View this message in context: http://drools.46999.n3.nabble.com/Finding-matching-values-in-composite-co... Sent from the Drools: User forum mailing list archive at Nabble.com.