FactType.get/set should throw specific exception (not NPE) for unknown fields ----------------------------------------------------------------------------- Key: DROOLS-546 URL: https://issues.jboss.org/browse/DROOLS-546 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 6.1.0.CR1 Reporter: Benoit Voisin Assignee: Mario Fusco Fix For: 6.1.0.Final factType.get(instance, "unknownField") is currently throwing an NPE. This gives improper information to the user/developper. I propose that it throws a new UnknownFactFieldException giving improved information giving good hints for debugging or enabling specific exception management. See pull request for test-case and proposed fix