[jboss-jira] [JBoss JIRA] Created: (JBRULES-1091) NullPointerException when the 'result' block of an 'accumulate' function returns null

[Alexandre Gattiker (JIRA)]

NullPointerException when the 'result' block of an 'accumulate' function returns null
-------------------------------------------------------------------------------------

                 Key: JBRULES-1091
                 URL: http://jira.jboss.com/jira/browse/JBRULES-1091
             Project: JBoss Rules
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions:  4.0.0.GA
            Reporter: Alexandre Gattiker
         Assigned To: Mark Proctor


java.lang.NullPointerException
	at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:73)
	at org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:34)
	at org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:57)
	at org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:48)
	at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:176)
	at org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
	at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)
	at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
	at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
	at org.drools.reteoo.Rete.assertObject(Rete.java:168)
	at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
	at org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:163)
	at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1241)
	at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
	at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
	at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
	at com.sample.DroolsTest.main(DroolsTest.java:28)


Example rule:
rule "Example"
	no-loop true
	when
		$d:		Double()
		from accumulate ( m : Message( $value: status ),
                              init( double total = 0; ),
                              action( System.out.println($value); ),
                              result( null )
                         )
	then
		System.out.println( "xx"); 
		
end

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