In the application that I am working for my client, soap message is passed as
input to a web service method which accepts a Java bean as an argument. The
mapping from the xml input to Java Bean is being handled by Apache CXF which
is internally using JAXB for unmarshalling.
The application requires incorrect input data to get replaced by some
default value. For eg, if the web service method accepts PersonBean as
argument, the XML input would have elements like name, age etc. Now, if the
age field in the input comes in as anything other than a number, the value
to set in the bean should be a default one specified for it (this may sound
strange, but it is for an EAI project and this is what the client wants)
To achieve this without disturbing the architecture in place, I created my
own custom CXF interceptor and placed it before the interceptor which
unmarshalls the input data in the interceptor chain. Thus I was able to
catch the exception when incorrect data was encountered. But, I was not able
to find a way to replace the incorrect data with default values. The Message
reference passed to the interceptor seems to provide only read-only access
to the input XML. I am sorry that I am not supposed to post the actual code
here. The custom interceptor that I have developed looks something like this
–
1. public class CustomInterceptor extends
AbstractPhaseInterceptor<Message> {
2. public CustomInterceptor() {
3. super(Phase.UNMARSHAL );
4. }
5.
6. public void handleMessage(Message message) {
7. // Code to validate message and modify message.
8. }
9. }
So guys, please suggest me your opinions on this. It would be great if
anyone here can suggest a way to modify the data wrapped in the message
reference passed to the handleMessage method shown above. It would also be
good to know about other ways to resolve my problem.
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