Re: [rules-users] 'Long' and 'double' value comparing problem in drools 5.1.0

My guess would be that the double is being typecast into a long before the comparison is made? Try switching the logic round so you do dbl < lo Thomas From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Miles Wen Sent: 04 March 2011 02:59 To: rules-users(a)lists.jboss.org Subject: [rules-users] 'Long' and 'double' value comparing problem in drools 5.1.0 hi there, I have a simple fact class: public class Msg { private Long lo = 5l; private double dbl = 5.5; public Long getLo() { return lo; } public void setLo(Long lo) { this.lo = lo; } public double getDbl() { return dbl; } public void setDbl(double dbl) { this.dbl = dbl; } } and a simple drl program: package com.sample import com.sample.Msg; rule "Hello World" when m:Msg(lo >= dbl) then System.out.println( "hello world" ); System.out.println(m.getLo()); System.out.println(m.getDbl()); end I simply compare the Long value, which is 5, to the double value ,which is 5.5, with operator '>=', and the output is: hello world 5 5.5 but it can't be ,cause 5 is less than 5.5. then I modified the drl program a bit: m:Msg(lo == dbl) It successfully prints out the message as well.It seems that drools treated the double value '5.5' as '5' in comparing... Is this a bug or something?What could I do to correct it? thanks. ________________________________ ************************************************************************************** This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the postmaster(a)nds.com and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603 8808 40-00 **************************************************************************************