[jboss-jira] [JBoss JIRA] Updated: (JBRULES-612) NPE on asserting facts before reading rules with retract
[ http://jira.jboss.com/jira/browse/JBRULES-612?page=all ]
Justine Hlista updated JBRULES-612:
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Attachment: test.tar.gz
The tar contains the following files to reproduce the NPE:
testCase.java -- the main driver source that asserts 2 facts, reads a rule file, then
fires the rules
factA.java -- simple fact asserted in main driver
factB.java -- another simple fact asserted in main driver
factC.java -- simple fact asserted within rule in testCase.drl
testCase.drl -- 2 simple rules: the first is triggered by factA and asserts factC, the
second is triggered by factB, factA, and factC and retracts factB and modifies factC
NPE.txt -- the stack trace for the resulting null pointer
NPE on asserting facts before reading rules with retract
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Key: JBRULES-612
URL: http://jira.jboss.com/jira/browse/JBRULES-612
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Affects Versions: 3.0.5
Environment: Windows XP, JDK 1.5.0_07
Reporter: Justine Hlista
Assigned To: Mark Proctor
Attachments: test.tar.gz
I have a scenario that asserts two simple facts, then reads a rule file, then fires the
rules. One of the rules retracts one of the facts, then modifies another object. An NPE
results when things are run as in the attached files.
However, if the rule file is read first, then the facts are asserted, there is no NPE.
Alternatively, if the second rule, the consequence of which retracts one of the facts, is
modified so that the retract is the last statement in the consequence, then the NPE does
not occur, even if the facts are asserted before the rules are read.
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