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https://issues.apache.org/jira/browse/TAPESTRY-1224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesse Kuhnert updated TAPESTRY-1224:
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Fix Version/s: 4.2
> Add JPA-annotation-driven validator
> -----------------------------------
>
> Key: TAPESTRY-1224
> URL: https://issues.apache.org/jira/browse/TAPESTRY-1224
> Project: Tapestry
> Issue Type: New Feature
> Affects Versions: 5.0, 4.1.1
> Reporter: Daniel Gredler
> Priority: Minor
> Fix For: 4.2
>
>
> The trend in validation seems to be to annotate your domain object
> properties; the annotations are then used by validation frameworks to
> validate the domain objects (see JPA / Hibernate Validator / JSR 303 /
> AppFuse 2 / etc).
> It'd be nice if Tapestry had a JpaValidator built in, which wouldn't be hard,
> except that the Validator interface doesn't provide enough information in the
> validate( ) method:
> public void validate(IFormComponent field, ValidationMessages messages,
> Object value) throws ValidatorException
> The options, as far as I can tell, would be:
> 1. The Validator level is the wrong level at which to read the annotations;
> read them higher up and assign multiple low-level validators
> (maxLength,required,maxValue,etc) at runtime. But where?
> 2. Provide the IBinding from which the value originated as an extra
> parameter in the validate( ) method, but let the validators check for
> whatever specific IBinding implementations they are interested in via
> instanceof.
> 3. Provide the IBinding from which the value originated as an extra
> parameter in the validate( ) method, and also enhance IBinding so that there
> is some standard way to access this sort of extra info without worrying about
> the specific binding type.
> Thoughts?
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