[rules-users] Comparing Date with || OR operator
Pavel Tavoda
pavel.tavoda at gmail.com
Wed Feb 24 04:54:24 EST 2010
What about:
Membership ( $regDate : regDate)
Segment ($endDate : endDate, startDate < $regDate || startDate > endDate )
Logically startDate > endDate doesn't make sense but it should work ;-)
Pavel
2010/2/24 Shabbir Dhari <sdhari at hotmail.com>:
> I tried with some thing different and it worked but I don’t want this as I
> have many collections in my data structure.
>
> //this works
> Membership ( $regDate : regDate)
> Segment ( $endDate : endDate )
> Segment ( startDate < $regDate || startDate > $endDate )
>
> //this does NOT work
> Membership ( $regDate : regDate)
> Segment ($endDate : endDate, startDate < $regDate || startDate >
> $endDate )
>
> ________________________________
> From: sdhari at hotmail.com
> To: rules-users at lists.jboss.org
> Date: Tue, 23 Feb 2010 23:09:50 +0000
> Subject: Re: [rules-users] Comparing Date with || OR operator
>
> Segment ( $endDate : endDate, startDate < $regDate || startDate > $endDate )
> even does not work. I am using verstion 5.0.1. All dates are java.util.Date
> and values in sample fact are:
>
> regDate = Fri Aug 01 00:00:00 BST 2008
> startDate = Tue Sep 01 00:00:00 BST 2009
> endDate = Fri Jul 30 00:00:00 BST 2010
>
> Stack trace:
>
> java.lang.NullPointerException
> at org.drools.reteoo.LeftTuple.get(LeftTuple.java:265)
> at org.drools.reteoo.LeftTuple.get(LeftTuple.java:300)
> at
> org.drools.rule.VariableRestriction$ObjectVariableContextEntry.updateFromTuple(VariableRestriction.java:320)
> at
> org.drools.rule.AbstractCompositeConstraint$MultiFieldConstraintContextEntry.updateFromTuple(AbstractCompositeConstraint.java:305)
> at
> org.drools.common.SingleBetaConstraints.updateFromTuple(SingleBetaConstraints.java:119)
> at org.drools.reteoo.JoinNode.assertLeftTuple(JoinNode.java:109)
> at
> org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:117)
> at
> org.drools.reteoo.SingleLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:78)
> at
> org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:142)
> at
> org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:42)
> at
> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:185)
> at
> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:146)
> at
> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1046)
> at
> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1001)
> at
> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:788)
> at
> org.drools.reteoo.ReteooStatelessSession.execute(ReteooStatelessSession.java:192)
> at
> au.gov.nsw.osr.zena.rules.AnnualRulesTester.main(AnnualRulesTester.java:57)
>
>
>> Date: Tue, 23 Feb 2010 12:54:46 +0100
>> From: wolfgang.laun at gmail.com
>> To: rules-users at lists.jboss.org
>> Subject: Re: [rules-users] Comparing Date with || OR operator
>>
>> Please try this rewrite of the 2nd CE:
>> Segment ( $endDate : endDate, startDate < $regDate || startDate > $endDate
>> )
>> and report the outcome to the list, together with the Dools version
>> you are using.
>> Thank you.
>>
>>
>> 2010/2/23 dhari <sdhari at hotmail.com>:
>> > Hi Thomas
>> >
>> > Thanks your prompt reply. I am sure all three attributes are NOT null. I
>> > have tested them before sending question to mailing list. If you want,
>> > I can
>> > send complete sample code and you can try it at your end.
>> >
>> > Regards,
>> > Dhari
>> >
>> >
>> > ________________________________
>> > Date: Tue, 23 Feb 2010 02:50:08 -0800
>> > From: [hidden email]
>> > To: [hidden email]
>> > Subject: Re: Comparing Date with || OR operator
>> >
>> > If it works fine with an and operator then I’d imagine that startDate <
>> > $regDate returns false, with an && this would abort evaluation
>> > immediately
>> > but with an or it would mean that startDate > endDate is evaluated and
>> > so
>> > presumably it is this bit that is throwing the NPE. I’d imagine that
>> > the
>> > most likely reason for this would be that endDate is null.
>> >
>> >
>> >
>> > Try changing it too
>> >
>> > Segment ( startDate < $regDate || (endDate != null && startDate >
>> > endDate) )
>> >
>> > And see whether you loose the NPE.
>> >
>> >
>> >
>> > Thomas
>> >
>> >
>> >
>> > From: [hidden email] [mailto:[hidden email]] On Behalf Of dhari
>> > Sent: 23 February 2010 06:15
>> > To: [hidden email]
>> > Subject: [rules-users] Comparing Date with || OR operator
>> >
>> >
>> >
>> > The following code generates NPE in ReteTuple.java
>> >
>> > rule
>> >
>> > when
>> >
>> > Membership ( $regDate : regDate)
>> >
>> > Segment ( startDate < $regDate || startDate > endDate )
>> >
>> > then
>> >
>> > System.err.print(“Invalid start date”);
>> >
>> > end
>> >
>> > I am new in Drools and don’t know much about DRL scripting. It works
>> > fine I
>> > use && operator instead.
>> >
>> > ________________________________
>> >
>> > View this message in context: Comparing Date with || OR operator
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>> >
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