How to configure empty targetNamespace in the Web Service?

Question

I'm trying to set up empty target namespace when creating the Web Service. Here is the example. My service looks like this:

package com.example;

import javax.jws.WebMethod;
import javax.jws.WebService;

@WebService
public class SampleService
{
    @WebMethod
    public void sampleMethod()
    {

    }
}

Defined like that, it accepts requests that look like this (please note the exam namespace declaration):

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
xmlns:exam="http://example.com/">
   <soapenv:Header/>
   <soapenv:Body>
      <exam:sampleMethod/>
   </soapenv:Body>
</soapenv:Envelope>

I would like to configure the web service to accept the requests that look like this (without the namespace):

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
   <soapenv:Header/>
   <soapenv:Body>
      <sampleMethod/>
   </soapenv:Body>
</soapenv:Envelope>

I tried to set up the targetNamespace to the empty string, but that didn't work - it just defaulted to the exam namespace.

@WebService(targetNamespace="")

I'm using Apache CXF (3.1.0) to expose the service:

<bean id="sampleService" class="com.example.SampleService" />
<jaxws:endpoint id="sampleServiceWs" implementor="#sampleService"
    address="/SampleService" publish="true">
</jaxws:endpoint>

Answer 1

To answer my question - I didn't find a way to set the empty targetNamespace, but I managed to leave out the request validation on my service, so that it now accepts the request with the namespace also. To do that, I used the @EndpointProperty annotation on top of the service class:

package com.example;

import javax.jws.WebMethod;
import javax.jws.WebService;
import org.apache.cxf.annotations.EndpointProperty;

@WebService
@EndpointProperty(key = "soap.no.validate.parts", value = "true")
public class SampleService
{
    @WebMethod
    public void sampleMethod()
    {

    }
}