[rules-users] Comparing Date with || OR operator

[dhari]

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: ml-node+379447-1511987735-80541 at n3.nabble.com
To: sdhari at hotmail.com
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. 



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