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From "J. Fiala" <>
Subject Re: CXF3 BeanValidation - wadl2java @Valid
Date Wed, 24 Aug 2016 16:36:07 GMT

I see the following cases when BeanValidation is preferable to schema 

1.) if the error should be clearly associated to the property which 
caused the error. This is possible with beanvalidation using the 
propertypath, with xml schema validation error messages you usually get 
the reference to the type but not the field which caused the error.

(e.g. cvc-pattern-valid: Value ''{0}'' is not facet-valid with respect 
to pattern ''{1}'' for type ''{2}''.)

2.) if the error message should be human readable / presented to the end 

3.) if the schema validation causes memory troubles e.g. with bigger xml 
requests with binary data in it (although this should be rarely the case 
with SAXParsers)

IMHO especially in case 1+2 it would be nice to use the beanvalidation, 
especially if the rest api is directly tied to a ui.

Best regards,

Am 23.08.2016 um 23:21 schrieb Sergey Beryozkin:
> Hi
> I'm not sure I'm understanding why is it needed.
> If we have a WADL-first approach which is where wadl-to-java becomes 
> useful, one can properly design XML schema (have all the restrictions 
> specified as needed). Then import this schema as a WADL grammar to 
> generate the JAXB beans and then use the same schema to enforce the 
> JAXB-level schema validation which will work on the client and on the 
> server sides.
> FYI, you can configure CXF JAXBElementProvider with XML schema 
> references.
> Cheers, Sergey
> On 23/08/16 18:03, J. Fiala wrote:
>> Hi,
>> CXF supports bean validation, however wadl2java doesn't support any bean
>> validation annotations yet (see
>> for the implementation for
>> complex parameters).
>> As it is not allowed to add @Valid to the method signatures of the
>> implementation classes, the @Valid annotation needs to be added to the
>> interface (which is generated using wadl2java).
>> Are there any plans to add @Valid-support to wadl2java (for methods +
>> complex parameters)?
>> Best regards,
>> Johannes

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