[rules-users] 5.6.0.CR1 gives a NullPointerException in after evaluator

[nxv]

Hello,

I'm able to reproduce this issue with a KB containing only 1 rule.

rule "Qualification##ToControl"
	salience 50
    when
		$p: AccessRegisterSnapshot(
				$effDt: effectivedate )
		$dpo: DeliveryPoint()
		$gCfg: GeneralConfig(
				( todate == null || 
				  ( todate after[ 0d ] $effDt &&
				    todate after[ 1ms ] fromdate ) ) )
				from $dpo.generalConfigs
    then
    	
end

This rule worked under drools 5.5.0.Final.  

Caused by: java.lang.NullPointerException at
org.drools.base.evaluators.AfterEvaluatorDefinition$AfterEvaluator.evaluate(AfterEvaluatorDefinition.java:347)
	at org.drools.base.EvaluatorWrapper.evaluate(EvaluatorWrapper.java:99)




Davide Sottara wrote
> I tried to reproduce the problem, with no success.
> Could you please create a self-contained unit test?
> If confirmed, I'll fix the problem as soon as possible
> Thanks
> Davide
> 
> On 11/14/2013 04:48 AM, abr wrote:
>> Hi everyone,
>>
>> I tried to switch from 5.5.0.Final to 5.6.0.CR1 and got a null pointer
>> exception in the evaluation of the after evaluator.
>> (Exact method is:
>> /org.drools.base.evaluators.AfterEvaluatorDefinition.AfterEvaluator.evaluate(InternalWorkingMemory,
>> InternalReadAccessor, InternalFactHandle, InternalReadAccessor,
>> InternalFactHandle)/ )
>>
>> When debugging, the exception occurs at the very first line of the
>> method,
>> in:
>> /    if ( extractor1.isNullValue( workingMemory, handle1.getObject() ) || 
>>             extractor2.isNullValue( workingMemory, handle2.getObject() )
>> ) {
>>         return false;
>>     }
>> /
>> The cause of the exception is that handle1 is null.
>>
>> The rule where the exception occurs looks like:
>> /    MyFact(
>>         fromdate before[ 0d ] $min,
>>         ( todate == null || todate after[ 0d ] $max ) )
>> /
>>
>> When the exception occurs, /MyFact.fromdate/ is not null, /$min/ is not
>> null, /MyFact.todate/ is null, /$max/ is not null.
>> In AfterEvaluator.evaluate : /extractor1/ refers to /MyFact.todate/,
>> /extractor2/ refers to /$max/, /handle1/ is null, /handle2/ refers to the
>> fact including the attribute to which /$max/ variable is bound to.
>>
>> Of course, this worked fine in 5.5.0.Final.
>> I couldn't test this out in Drools 6.0.0.CR5 because I have dependencies
>> to
>> drools-spring JAR that does not exist anymore in 6.0.0.CR5.
>>
>> Is it simple to fix this problem?
>>
>> Thanks in advance.
>>
>> Best,
>> Alexis
>>
>>
>>
>> --
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Sent from the Drools: User forum mailing list archive at Nabble.com.