How to change the responseType in a cxf RESTful service

Say you have the following as a RESTservice

 @Path("/loc")  
 @GET  
 @Consumes  
 @Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })  
 public String getLocation(...)   
 {  
     ..  
  }  

This method produces XML or JSON based on the Accept Header that is passed in.
If you had to figure out a way to override the Accept Header value and always generate JSON, how would you do it?
CXF interceptors allows you to achieve this elegantly.
Register a OutInterceptor in your beans.xml

 public class CustomOutInterceptor extends AbstractPhaseInterceptor<Message>  
 {  
 public CustomOutInterceptor()  
 {  
  super(Phase.PRE_STREAM);  
 }  
 public void handleMessage(final Message message) throws Fault  
 {  
   final List<MediaType> mediaTypeL = new ArrayList<MediaType>();  
   //Return JSON always  
   mediaTypeL.add(MediaType.APPLICATION_JSON_TYPE);  
   message.getExchange().put(Message.ACCEPT_CONTENT_TYPE, mediaTypeL);  
 }  
 }