Better control over field conversion errors than invalid.fieldvalue.xxx
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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
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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