JAXRSOutInterceptor throws NullPointerException for unknown requests when using 
exception mapper
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                 Key: CXF-1858
                 URL: https://issues.apache.org/jira/browse/CXF-1858
             Project: CXF
          Issue Type: Bug
          Components: REST
    Affects Versions: 2.1.2
         Environment: windows XP, jdk1.6.0_07, tomcat 6.0.18
            Reporter: david


JAX-RS webservice

When a client requests URL that isnt a valid service endpoint and using an 
Exeption mapper to return more detailed error, if you add an entity in the 
response the JAXRSOutInterceptor throws a NPE.

java.lang.NullPointerException
        at 
org.apache.cxf.jaxrs.interceptor.JAXRSOutInterceptor.processResponse(JAXRSOutInterceptor.java:150)
        at 
org.apache.cxf.jaxrs.interceptor.JAXRSOutInterceptor.handleMessage(JAXRSOutInterceptor.java:61)
   .....


The exception mapper:

public class MyExceptionMapper implements ExceptionMapper<Exception>
{
        
        private static Logger LOG = 
LogUtils.getL7dLogger(MyExceptionMapper.class);
        
        @Override
        public Response toResponse(Exception ex) 
        {
                LOG.logp(Level.WARNING, "MyExceptionMapper", 
"toResponse","Caught Exception:", ex);
                return 
Response.status(503).type("text/html").entity("Myexception error 
description").build();
        }

}


If I dont put the entity in the response it works, but with an entity in the 
response it causes a NullPointerException.


currently in SVN and 2.1.2 JAXRSOutInterceptor.java line 150 is :
writer.writeTo(responseObj, targetType, invoked.getGenericReturnType(), 
                               invoked != null ? invoked.getAnnotations() : new 
Annotation[]{}, 
                               responseType, 
                               response.getMetadata(), 
                               out);
                

perhaps should be  this :

writer.writeTo(responseObj, targetType, 
                               invoked != null ? invoked.getGenericReturnType() 
: null, 
                               invoked != null ? invoked.getAnnotations() : new 
Annotation[]{}, 
                               responseType, 
                               response.getMetadata(), 
                               out);





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