<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>Thanks, Edson.<br>I do have the source code for Drools4.0.7. How do I build and run the unit tests?<br><br>Marina<br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Edson Tirelli <tirelli@post.com><br><b><span style="font-weight: bold;">To:</span></b> Rules Users List <rules-users@lists.jboss.org><br><b><span style="font-weight: bold;">Sent:</span></b> Thursday, November 6, 2008 10:46:46 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [rules-users] using BigDecimal in rules<br></font><br><br> It sounds like a bug. Can you get Drools
source code and look at the unit test for this to make sure your scenario works there? The file is:<br><br>drools-core/src/test/java/org/drools/base/EvaluatorFactoryTest.java<br>
<br> Method is:<br><br>testBigDecimal()<br><br> Very easy to add your use case in there.<br><br> Let us know what you find.<br><br> Edson<br><br><div class="gmail_quote">2008/11/6 Marina <span dir="ltr"><<a rel="nofollow" ymailto="mailto:ppine7@yahoo.com" target="_blank" href="mailto:ppine7@yahoo.com">ppine7@yahoo.com</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div>Hi,<br>
<br>I'm getting unexpected results when when using BigDecimal objects for matching in rules. <br>I'm generating DRL in my code, using freemaker.<br><br>I have a RuleEngineNumericFact object which has two attributes:<br>
String propertyName<br>BigDecimal propertyValue<br><br>Below is an example of a rule where I try to match a RuleEngineNumericFact object based on the two attributes:<br>
<br>rule "aaa"<br> agenda-group "r1"<br> dialect "java"<br> when<br> (RuleEngineNumericFact( propertyName == "somename" , <span style="font-weight: bold;">propertyValue == 10.8 </span>))<br>
then<br> String ruleId = drools.getRule().getName();<br> firedRuleIDs.add(ruleId);<br>end<br><br><br>Then I create a new RuleEngineNumericFact object and set its propertyValue as following:<br><br>String <span style="font-weight: bold;">stringValue = "10.8"</span>;<br>
BigDecimal propertyValue = new BigDecimal(stringValue, new MathContext(10));<br><br>(I also tried to use default precision settings by creating the BigDecimal value as:<br>BigDecimal propertyValue = new BigDecimal(stringValue);<br>
)<br>
<br>When I insert this fact into the rule engine - the rule does not get fired, so the fact does not match.<br><br>One note: if the values are integeres (like, propertyValue == 100) - the rule gets fired. So, it is only the floating point numbers that do not match.<br>
<br>I generate the DRL in my Java code, using freemaker, and I specify the
value that will be used in the rule for matching by calling toString()
method on a BigDecimal object that I get from my business code. The toString() representation ends up to be the "10.8" value (for example).<br>According to the BigDecimal documentation, marshalling from/to the same string representation shoudl still produce BigDecimal objects that will return TRUE from the equals() method when compared.<br>
<br><br>any ideas why this is not working here?<br>How does Drools compare values of objects like BigDecimal?<br><br>thanks,<br><font color="#888888">Marina<br><br><br><br><br>
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<br></blockquote></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> JBoss Drools Core Development<br> JBoss, a division of Red Hat @ <a rel="nofollow" target="_blank" href="http://www.jboss.com">www.jboss.com</a><br>
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