Root element namespace prefix removed when using policy feature

[Szymon.LUBIENIECKI]

Hi,
I'm using cxf 3.0.9 with security policy added in a dynamic way:

private static void initializedP2pPolicyFeature(Client wsClient) throws 
ParserConfigurationException, SAXException, IOException {
    PolicyBuilder builder = wsClient.getBus().getExtension(PolicyBuilder.class);
    Policy policy = 
builder.getPolicy(NodeWebServiceProvider.class.getResourceAsStream(P2P_POLICY_FILE));
    WSPolicyFeature wsPolicyFeature = new WSPolicyFeature(policy);
    wsClient.getBus().getFeatures().add(wsPolicyFeature);
    wsPolicyFeature.initialize(wsClient, wsClient.getBus());
}


When the policy is added then the root element in my soap body has no prefix:

                <soap:Body 
xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd";
 wsu:Id="_50f6c0c5-1e8c-4828-8fe1-7835388d361b">
                                
<SubmitRetrieveInterchangeAgreementsRequestRequest 
xmlns:ns16="http://uri.etsi.org/01903/v1.4.1#"; 
xmlns:ns15="urn:oasis:names:specification:ubl:schema:xsd:Fault-1" 
xmlns:ns14="ec:schema:xsd:RetrieveInterchangeAgreementsRequest-2" 
xmlns:ns13="ec:schema:xsd:RetrieveInterchangeAgreementsResponse-2" 
xmlns:ns12="http://uri.etsi.org/01903/v1.3.2#"; 
xmlns:xmime="http://www.w3.org/2005/05/xmlmime"; 
xmlns:ns10="ec:schema:xsd:CommonBasicComponents-1" 
xmlns:ns9="urn:oasis:names:specification:ubl:schema:xsd:SignatureAggregateComponents-2"
 xmlns:ns8="http://www.w3.org/2000/09/xmldsig#"; 
xmlns:ns7="urn:oasis:names:specification:ubl:schema:xsd:SignatureBasicComponents-2"
 
xmlns:ns6="http://www.unece.org/cefact/namespaces/StandardBusinessDocumentHeader";
 xmlns:ns5="ec:schema:xsd:CommonAggregateComponents-2" 
xmlns:ns4="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
 
xmlns:ns3="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"
 
xmlns:ns2="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2">
                                                
<ece:RetrieveInterchangeAgreementsRequest>
                                                                
<ns4:SenderParty>
                                                                                
<ns2:EndpointID>DEV1_NOTENC_WEB_PARTY</ns2:EndpointID>
                                                                
</ns4:SenderParty>
                                                                
<ns4:ReceiverParty>
                                                                                
<ns2:EndpointID>DEV1_NOTENC_APP_PARTY</ns2:EndpointID>
                                                                
</ns4:ReceiverParty>
                                                
</ece:RetrieveInterchangeAgreementsRequest>
                                
</SubmitRetrieveInterchangeAgreementsRequestRequest>
                </soap:Body>


I've managed to add the prefix by adding the "soap.env.ns.map", but then the 
response is failing signature validation.
Response got valid namespace prefix:
<ec:SubmitRetrieveInterchangeAgreementsRequestResponse 
xmlns:ec="ec:services:wsdl:RetrieveInterchangeAgreementsRequest-2" 
xmlns:ec1="ec:schema:xsd:CommonBasicComponents-0.1">... 
</ec:SubmitRetrieveInterchangeAgreementsRequestResponse>


But during the signature validation the prefix was gone:
2016-06-02 16:10:42,724 DEBUG 
[org.apache.jcp.xml.dsig.internal.DigesterOutputStream] - <SOAP-ENV:Body 
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"; 
xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd";
 
wsu:Id="XWSSGID-1464876575214141951024"><SubmitRetrieveInterchangeAgreementsRequestResponse
 xmlns="ec:services:wsdl:RetrieveInterchangeAgreementsRequest-2" 
xmlns:ec="ec:services:wsdl:RetrieveInterchangeAgreementsRequest-2" 
xmlns:ec1="ec:schema:xsd:CommonBasicComponents-0.1">

Causing that the actual digest didn't match the expected value.

Can you please help? I'm stuck with this problem for a week already.

Best regards,
Szymon