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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Have you got the stack trace, that may give a clue? Also what are the actual values of start date and end date?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Thomas<o:p></o:p></span></p>
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color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:
"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Tahoma","sans-serif""> rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org]
<b>On Behalf Of </b>dhari<br>
<b>Sent:</b> 23 February 2010 11:30<br>
<b>To:</b> rules-users@lists.jboss.org<br>
<b>Subject:</b> Re: [rules-users] Comparing Date with || OR operator<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Hi Thomas</span><br>
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span><br>
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">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.</span><br>
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span><br>
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Regards,</span><br>
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Dhari</span><br>
<br>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Date: Tue, 23 Feb 2010 02:50:08 -0800<br>
From: <a href="http://n3.nabble.com/user/SendEmail.jtp?type=node&node=383423&i=0" target="_top">
[hidden email]</a><br>
To: <a href="http://n3.nabble.com/user/SendEmail.jtp?type=node&node=383423&i=1" target="_top">
[hidden email]</a><br>
Subject: Re: Comparing Date with || OR operator<o:p></o:p></p>
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<p class="ecxmsonormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">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.</span><o:p></o:p></p>
<p class="ecxmsonormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"> </span><o:p></o:p></p>
<p class="ecxmsonormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Try changing it too
</span><o:p></o:p></p>
<pre>Segment ( startDate < $regDate || (endDate != null && startDate > endDate) )<o:p></o:p></pre>
<p class="ecxmsonormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">And see whether you loose the NPE.</span><o:p></o:p></p>
<p class="ecxmsonormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"> </span><o:p></o:p></p>
<p class="ecxmsonormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Thomas</span><o:p></o:p></p>
<p class="ecxmsonormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"> </span><o:p></o:p></p>
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<p class="ecxmsonormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:
"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Tahoma","sans-serif""> [hidden email] [mailto:[hidden email]]
<b>On Behalf Of </b>dhari<br>
<b>Sent:</b> 23 February 2010 06:15<br>
<b>To:</b> [hidden email]<br>
<b>Subject:</b> [rules-users] Comparing Date with || OR operator</span><o:p></o:p></p>
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<p class="ecxmsonormal"> <o:p></o:p></p>
<p class="ecxmsonormal">The following code generates NPE in ReteTuple.java <o:p></o:p></p>
<pre>rule <o:p></o:p></pre>
<pre> when<o:p></o:p></pre>
<pre> Membership ( $regDate : regDate)<o:p></o:p></pre>
<pre> Segment ( startDate < $regDate || startDate > endDate )<o:p></o:p></pre>
<pre> then<o:p></o:p></pre>
<pre> System.err.print(“Invalid start date”);<o:p></o:p></pre>
<pre>end<o:p></o:p></pre>
<p class="ecxmsonormal">I am new in Drools and don’t know much about DRL scripting. It works fine I use && operator instead.
<o:p></o:p></p>
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<p class="ecxmsonormal">View this message in context: Comparing Date with || OR operator<br>
Sent from the Drools - User mailing list archive at Nabble.com.<o:p></o:p></p>
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