[rules-users] Checking facts between them

[Delaunay Gaetan]

I've tried both solution but it doesn't work.

-> triggerRuntimeException; CausedByException is:
    null
javax.ejb.EJBException: RuntimeException; CausedByException is:
    null
    at 
org.jboss.ejb.plugins.LogInterceptor.handleException(LogInterceptor.java:381)
    at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:195)
java.lang.NullPointerException
    at 
org.drools.common.DoubleBetaConstraints.updateFromTuple(DoubleBetaConstraints.java:125)
    at org.drools.reteoo.JoinNode.assertTuple(JoinNode.java:102)
    at 
org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple(SingleTupleSinkAdapter.java:20)
    at org.drools.reteoo.JoinNode.assertObject(JoinNode.java:149)
    at 
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:317)

Does anyone have an idea?
> If you don't want the same Object in RHS, you have to add one condition :
>
> rule "compare dates"
> 	when
> 		$f:FactObject($d1 : date)
> 		FactObject(this != $f, date == $d1)
> 	then
>
>  end
>
>
>
>
>
> -----Message d'origine-----
> De : rules-users-bounces at lists.jboss.org
> [mailto:rules-users-bounces at lists.jboss.org] De la part de Shyam, Pallav
> (MSCIBARRA)
> Envoyé : mardi 2 septembre 2008 18:06
> À : Rules Users List
> Objet : RE: [rules-users] Checking facts between them
>
> rule "compare dates"
> 	when
> 		FactObject($d1 : date)
> 		FactObject(date == $d1)
> 	then
>  end
>
> This assumes there is an object FactObject with attribute date. 
>
> -----Original Message-----
> From: rules-users-bounces at lists.jboss.org
> [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Delaunay
> Gaetan
> Sent: Tuesday, September 02, 2008 9:17 PM
> To: rules-users at lists.jboss.org
> Subject: [rules-users] Checking facts between them
>
> Hi all,
>
> I was wondering if  it was possible to create a rule which checks if a
> fact is equal to another one. For example in my case i'd like to compare
> the date of fact with the date of fact +1. I hope you understand what i
> mean.
>
> What kind of rule will be suitable to do that?
>
> Thanks
> Gaetan
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