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: [email protected] [mailto:[email protected]] On Behalf Of Miles Wen Sent: 04 March 2011 02:59 To: [email protected] 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 [email protected] 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 **************************************************************************************
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