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http://issues.apache.org/jira/browse/IBATIS-257?page=comments#action_12366321 ] 

Sven Boden commented on IBATIS-257:
-----------------------------------

Thomas,

Can you supply more information: maps, config, TypeHandlerCallback source code, 
java pieces. Ideal would be a small working example that shows the problem.

Debugging "sometimes" is pretty hard. IBATIS-224 comes to mind as similar 
problem, but I have also not been able to duplicate the error in there.




> custom TypeHandlerCallback does not work - sometimes
> ----------------------------------------------------
>
>          Key: IBATIS-257
>          URL: http://issues.apache.org/jira/browse/IBATIS-257
>      Project: iBatis for Java
>         Type: Bug
>   Components: SQL Maps
>     Versions: 2.1.7
>  Environment: WinXP; iBatis 2.1.7; Oracle 9i; JDK 1.4+
>     Reporter: Thomas Wagner

>
> The usage of  a custom TypeHandlerCallback depends on the position of the 
> column in the resultMap. 
> If the previous colum has a value, all works fine. But if the value of the 
> previous column is null, the mapping via a custom TypeHandlerCallback does 
> not work.

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