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From "Narayana S" <narayanas...@gmail.com>
Subject Re: Validation doubt
Date Tue, 01 Jul 2008 06:12:58 GMT
Hi Jeromy and Lukasz,

             Thanks for your reply, the information provided by you is
really helpful. i could understand well about validation framework with your
explanation.

Thanks a lot.

On Mon, Jun 30, 2008 at 1:45 PM, Jeromy Evans <
jeromy.evans@blueskyminds.com.au> wrote:

> Narayana S wrote:
>
>> Hi,
>>
>>    as per my understanding, we can implement validations in struts 2 in
>> the
>> following ways...
>>
>> 1. overriding validate() method in Action class
>>
>>
>
> Use the validate() method for complex validation that cannot be implement
> anywhere else. You want to avoid duplicating validation code so this method
> should be for special cases.
>
>  2. writing ActionClass-validation.xml file
>>
>>
>
> The XML validation was developed first before Java 5 annotations can be
> assumed.  It is a little more mature than annotations but some people
> doesn't like having to manage more configuration files.
>
>
>  3. using validator annotations
>>
>>
>>
> The annotations implement much of what is available in XML and avoid the
> separate configuration.  There are some complications when using annotations
> but generally they're fine.  Sometimes I've found the validation annotations
> are longer than the actual code, which is a bad thing.  I prefer XML, many
> people prefer annotations.
>
>
>  and how can i implement client side validations in struts 2?
>>
>>
>
> The struts 2 form tags have client-side validation built-in if you set
> validate=true on the form.
> What actually happens is that a loop in the form's closing-tag template
> reads the validations from the xml/annotations of your action and generates
> some javascript implementing whatever validation logic it can from the
> client-side.  The benefit is that one validation declaration can be used for
> both client and server-side.  However it can't implement all validation
> logic, it assumes you're using struts2 tags and markup for all fields and it
> generates inline javascript.
>
> See:
> http://struts.apache.org/2.0.11.1/docs/client-side-validation.html
>
> regards,
> Jeromy Evans
>
>
>
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