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From "Don Brown (JIRA)" <j...@apache.org>
Subject [jira] Updated: (WW-1770) Better control over field conversion errors than invalid.fieldvalue.xxx
Date Fri, 13 Jun 2008 01:06:05 GMT

     [ https://issues.apache.org/struts/browse/WW-1770?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Don Brown updated WW-1770:
--------------------------

    Fix Version/s:     (was: 2.1.x)
                   Future

> Better control over field conversion errors than invalid.fieldvalue.xxx
> -----------------------------------------------------------------------
>
>                 Key: WW-1770
>                 URL: https://issues.apache.org/struts/browse/WW-1770
>             Project: Struts 2
>          Issue Type: Improvement
>    Affects Versions: 2.0.6
>            Reporter: Sami Dalouche
>            Priority: Minor
>             Fix For: Future
>
>
> Any Application Design that follows a rich-domain paradigm (e.g. Domain Driven Design)
will necessarily implement business validation rules in domain entities. Some Integrity-checking
rules can be implemented as "throw new WhateverBusinessException()" right in the object mutators
(aka setters) to avoid having an undefined object state.
> Since Struts2/XWork/OGNL is supposed to help binding data directly to domain entities,
it seems natural to help the application report the correct errors to the user. However, if
a setter throws an exception, the only customizable message is invalid.fieldvalue.xxx, which
means that if the setter can throw 10 exceptions, only one generic message can be displayed
to the user.
> As a result, it would  be useful to be able to customize the error message using the
exception thrown, and not just the field name Something such as :
> invalid.path.to.Exception.xxx
> where path.to.Exception is the FQ class name, and xxx is the field name.
>  

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