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https://issues.apache.org/jira/browse/WW-2923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13474177#comment-13474177
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Lukasz Lenart commented on WW-2923:
-----------------------------------
It isn't implemented, but there is a bit of work as each validator must be
refactored.
> Allow validator parameters to be set via OGNL rather than hard coding in XML
> ----------------------------------------------------------------------------
>
> Key: WW-2923
> URL: https://issues.apache.org/jira/browse/WW-2923
> Project: Struts 2
> Issue Type: Improvement
> Components: XML Validators
> Affects Versions: 2.1.2
> Environment: Standard
> Reporter: Scott Stanlick
> Priority: Minor
> Fix For: 2.3.6
>
>
> I have been experimenting with a softer way to perform validations. I like
> the idea of externalizing the validations in XML, however, it would be more
> flexible if the parameters could be "set" using matches from the ValueStack
> rather than requiring them to be hardcoded in the XML. I have drilled into
> the validator creation and believe that the
> ValidatorConfig.Builder(ValidatorConfig cfg) might be the place to check for
> ${foo}. There are many other places in the framework where this string is
> searched for and its content replaced by using an OGNL search.
> In my current use case, I am fetching valid ranges from a database according
> to user inputs. These varying integers are what I would like to use as my
> min and max values. I realize I could use an expression type validation or
> just code the validation inside my action. However, it doesn't seem natural
> to be forced into an alternative technique with the ValueStack being so
> central to the framework. It seems that if the value stack can be used for
> the validator message "Age must be between ${min} and ${max}" it should also
> be available for fetching constraints.
> <field name="age">
> <field-validator type="int">
> <param name="min">${minLimit}</param>
> <param name="max">${maxLimit}</param>
> <message>Age must be between ${minLimit} and
> ${maxLimit}</message>
> </field-validator>
> </field>
> Peace,
> Scott
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