[jboss-jira] [JBoss JIRA] Closed: (JBRULES-1435) NPE if rule checks a Long field for null, and a fact is passed in with Long field that is NOT null.

NPE if rule checks a Long field for null, and a fact is passed in with Long field that is NOT null. --------------------------------------------------------------------------------------------------- Key: JBRULES-1435 URL: http://jira.jboss.com/jira/browse/JBRULES-1435 Project: JBoss Drools Issue Type: Bug Affects Versions: 4.0.4 Environment: os x, jdk 1.5 Reporter: Alex McCarrier Fix For: 4.0.5, 5.0.0-M1 Original Estimate: 0 minutes Remaining Estimate: 0 minutes If you have a fact class that has a field that is a Long: class MyFact { Long myField = new Long(0); ... } rule CheckMyField when MyFact(myField == null) then ... do something about it ... end If you pass that fact into the engine you will get an NPE. The problem lies in the fact that when comparing a Long against null, it thinks that since the value passed in is not null and is a Long, the second value should also be not null. But since the rule says to check for null, it fails trying to throw a ClassCastException. Since the second value is null, it gets an NPE trying to generate the message saying that value (null) is not of class Long. The problem is in org.drools.base.evaluators.ObjectFactory.ObjectEqualsComparator line 553. When arg0 is a Number it doesn't account for the possibility that arg1 might be null.