"contains" operator behaves inconsistently when used with Maps -------------------------------------------------------------- Key: DROOLS-680 URL: https://issues.jboss.org/browse/DROOLS-680 Project: Drools Issue Type: Bug Affects Versions: 5.6.0.Final, 6.0.1.Final, 6.1.0.Final, 6.2.0.CR4 Reporter: Davide Sottara Assignee: Mario Fusco Fix For: 7.0.0.Beta8 In a rule {code} Bean( map contains "x" ) // assuming "map" is a property of type Map {code} "contains" is arbitrarily interpreted as "containsKey" The constrain will then fail after being jitted The documentation explicitly states that "contains" applies to collections