[jboss-jira] [JBoss JIRA] Commented: (JBRULES-1284) ClassCastException when using "<" constraint on field of type java.lang.Object containing data of type java.lang.Integer

[Justin Wick (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBRULES-1284?page=comments#action_12383469 ] 
            
Justin Wick commented on JBRULES-1284:
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IMHO, if this is known to be a "bad" thing to do, the compiler should at least throw a warning saying so, if not a straight-out error.  Unless, of course, the runtime coercian could be made better.

Is there a reason runtime type coercion cannot say that literals are whatever type they would be in Java?  i.e. 50 is  an integer, 50l is a long, 50.0 is a double, "50" is a String, etc?

> ClassCastException when using "<" constraint on field of type java.lang.Object containing data of type java.lang.Integer
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: JBRULES-1284
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-1284
>             Project: JBoss Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 4.0.2
>         Environment: Windows XP, Eclipse 3.2
>            Reporter: Justin Wick
>         Assigned To: Mark Proctor
>         Attachments: DroolsTest.zip
>
>
> If I'm doing a pattern constraint, say "< 50" on a field, and that field is type java.lang.Object, with a value of type java.lang.Integer, a ClassCastException is generated at run time, although there is no compile-time error saying that this is an illegal constraint.
> See attached files for an example

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