Re: [rules-users] using BigDecimal in rules

Thanks, Edson. I do have the source code for Drools4.0.7. How do I build and run the unit tests? Marina ------------------------------ *From:* Edson Tirelli <tirelli(a)post.com&gt; *To:* Rules Users List <rules-users(a)lists.jboss.org&gt; *Sent:* Thursday, November 6, 2008 10:46:46 AM *Subject:* Re: [rules-users] using BigDecimal in rules 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: drools-core/src/test/java/org/drools/base/EvaluatorFactoryTest.java Method is: testBigDecimal() Very easy to add your use case in there. Let us know what you find. Edson 2008/11/6 Marina <ppine7(a)yahoo.com&gt; > Hi, > > I'm getting unexpected results when when using BigDecimal objects for > matching in rules. > I'm generating DRL in my code, using freemaker. > > I have a RuleEngineNumericFact object which has two attributes: > String propertyName > BigDecimal propertyValue > > Below is an example of a rule where I try to match a RuleEngineNumericFact > object based on the two attributes: > > rule "aaa" > agenda-group "r1" > dialect "java" > when > (RuleEngineNumericFact( propertyName == "somename" , propertyValue > == 10.8 )) > then > String ruleId = drools.getRule().getName(); > firedRuleIDs.add(ruleId); > end > > > Then I create a new RuleEngineNumericFact object and set its propertyValue > as following: > > String stringValue = "10.8"; > BigDecimal propertyValue = new BigDecimal(stringValue, new > MathContext(10)); > > (I also tried to use default precision settings by creating the BigDecimal > value as: > BigDecimal propertyValue = new BigDecimal(stringValue); > ) > > When I insert this fact into the rule engine - the rule does not get > fired, so the fact does not match. > > 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. > > 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). > 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. > > > any ideas why this is not working here? > How does Drools compare values of objects like BigDecimal? > > thanks, > Marina > > > > > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users