[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

Thu Nov 8 20:35:44 EST 2007

    [ http://jira.jboss.com/jira/browse/JBRULES-1284?page=comments#action_12386768 ] 

Michael Neale commented on JBRULES-1284:
----------------------------------------

As discussed - we should treat object fields as an unknown type, no hashing, just evaluate it as needed. This will mean a performance penalty, but the only other alternative is to defer any sort of hashing decision until we see an object, work out its type, but that is not rigorous. If people want to use Object, they have to understand, that there is price to pay at runtime. 

> 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: Edson Tirelli
>            Priority: Blocker
>             Fix For: 4.0.4, 4.1.0
>
>         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

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira