[jboss-jira] [JBoss JIRA] (JBRULES-3338) Accuracy lost when comparing numbers

[Miles Wen (Created) (JIRA)]

Accuracy lost when comparing numbers
------------------------------------

                 Key: JBRULES-3338
                 URL: https://issues.jboss.org/browse/JBRULES-3338
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: drools-core  (expert)
    Affects Versions: 5.3.0.Final
         Environment: sun jdk 1.6u27, drools 5.3.0 final
            Reporter: Miles Wen
            Assignee: Mark Proctor


Accuracy lost when comparing two numbers which has different number types. for example:
I have a pojo fact class 'Msg.java', and it has a int field named 'intVal', which value is inited 5.
And I write down this rule and run with default settings:

rule "out"
    when
    	Msg(intVal == 5.5)
    then
end

this rule would fire! but it shouldn't, cause 5 != 5.5.

It seems that drools converts the second operand of a comparison to the type of the first, no matter what the first number's type is. This definitely caused some accuracy lost in many cases.

if I wrote Msg(5.5 == intVal), the code behaves correctly.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.jboss.org/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira