[jboss-jira] [JBoss JIRA] Commented: (JBRULES-1415) Certain uses of from causes NullPointerException in WorkingMemoryLogger
[ http://jira.jboss.com/jira/browse/JBRULES-1415?page=comments#action_12394831 ]
Mattias Nilsson commented on JBRULES-1415:
------------------------------------------
I checked out the source code and found that the problem seems to be solved if I make the
following change in method extractDeclarations in class WorkingMemoryLogger.
From:
final Object value = declaration.getValue( (InternalWorkingMemory) workingMemory,
workingMemory.getObject( handle ) );
To:
final Object value = declaration.getValue( (InternalWorkingMemory) workingMemory,
handleImpl.getObject());
But maybe it isn't safe to call handleImpl.getObject instead of
workingMemory.getObject?
Regards,
Mattias
Certain uses of from causes NullPointerException in
WorkingMemoryLogger
-----------------------------------------------------------------------
Key: JBRULES-1415
URL: http://jira.jboss.com/jira/browse/JBRULES-1415
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Affects Versions: 4.0.3
Reporter: Mattias Nilsson
Attachments: testcase.zip
This rule causes a NullPointerException when WorkingMemoryFileLogger is activated.
Without the logger the rule works fine.
{quote}
rule "TestRule"
when
A( theList : list )
B( theName : name ) from theList
then
System.out.println( "ok" );
end
{quote}
Seems to be the assigning of variable theName that causes the problem. If i remove
"theName : name" there is no NullPointerException. Here is the stack trace:
java.lang.NullPointerException
at org.drools.base.com.sample.DroolsTest$B15799300$getName.getValue(Unknown Source)
at org.drools.base.ClassFieldExtractor.getValue(ClassFieldExtractor.java:127)
at org.drools.rule.Declaration.getValue(Declaration.java:197)
at
org.drools.audit.WorkingMemoryLogger.extractDeclarations(WorkingMemoryLogger.java:267)
at org.drools.audit.WorkingMemoryLogger.activationCreated(WorkingMemoryLogger.java:201)
at
org.drools.event.AgendaEventSupport.fireActivationCreated(AgendaEventSupport.java:75)
at org.drools.reteoo.RuleTerminalNode.assertTuple(RuleTerminalNode.java:331)
. . .
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