Re: Unmarshalling interceptor

[Sergey Beryozkin]

Hi Marko,

thanks for this tip, it could be an issue to deal with in scope of WS 
requests, and CXF JAXB DataBinding used by JAX-WS may already offer such 
an option,
however, it's definitely worth updating JAXBElementProvider with the 
Listener property :-). it is possibele to set a ValidationEventHandler 
on it, but not the Listener

Thanks, Sergey
On 04/04/12 14:12, Voß, Marko wrote:
Hello Abhishek Sharma,

I think this is a JAXB issue. You can register a Listener to the Unmarshaller.

http://docs.oracle.com/javase/6/docs/api/javax/xml/bind/Unmarshaller.html
http://docs.oracle.com/javase/6/docs/api/javax/xml/bind/Unmarshaller.Listener.html

There are also some examples in the Javadoc of the possibilities.

In order to get this working with CXF, you need to extend the 
JAXBElementProvider:

(org.apache.cxf.jaxrs.provider.JAXBElementProvider)

Example:

public class MyJAXBElementProvider extends JAXBElementProvider {

    // override the methods here like:
    protected Unmarshaller createUnmarshaller(Class<?>  cls, Type genericType, 
boolean isCollection) {
      Unmarshaller u = super.createUnmarshaller(cls, genericType, isCollection);
      u.setListener(MY_LISTENER);
      return u;
    }
}

Now, register the provider:

<jaxrs:server id="RestServices" address="">
      <jaxrs:providers>
        <ref bean="MyJaxbProvider"/>
      </jaxrs:providers>
</jaxrs:server>


Best regards,

Marko

Am 04.04.2012 12:56, schrieb Abhishek Sharma:
Hi,

I’ve a requirement when writing a CXF client. In my webservice response I am 
getting a list of myData object.

Now I want some group data by iterating over the entire list. The problem is 
size of the list is high so I don’t want to
iterate again.

I know the unmarshaller used by the client is doig the same when converting XML 
to object. If somehow I can intercept
while unmarshal and calculate group data then I don’t have to iterate.

I want to see some example code using Unmarshal or Pre_Logical or Post_Logical 
filter.

Thanks,

*Abhishek Sharma**|* -

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