How to change "SOAP-ENV" default prefix of Spring-WS

Question

I've created a web service using Spring-WS. To maintain compatibility with the old system, I need to change namespace prefix from SOAP-ENV to soap.

I know that SOAP-ENV and soap are just namespace prefixes. As long as they refer to the correct namespace ("http://schemas.xmlsoap.org/soap/envelope/"), it should be fine.

But the old system hard coded the parser code to expect only soap namespace prefix.

Current response:

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
   <SOAP-ENV:Header/>
   <SOAP-ENV:Body>
   ...
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Expected response:

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

Here's what I've tried so far

1. Create EndpointInterceptorAdapter subclass. This will intercept SOAP response/fault and alter the SOAP envelope. This works, but it's not ideal in terms of performance.

   public class CustomEndpointInterceptor extends EndpointInterceptorAdapter {
   
     private static final String DEFAULT_NS = "xmlns:SOAP-ENV";
     private static final String SOAP_ENV_NAMESPACE = "http://schemas.xmlsoap.org/soap/envelope/";
     private static final String PREFERRED_PREFIX = "soap";
     private static final String HEADER_LOCAL_NAME = "Header";
     private static final String BODY_LOCAL_NAME = "Body";
     private static final String FAULT_LOCAL_NAME = "Fault";
   
     @Override
     public boolean handleResponse(MessageContext messageContext, Object endpoint) throws Exception {
       SaajSoapMessage soapResponse = (SaajSoapMessage) messageContext.getResponse();
       alterSoapEnvelope(soapResponse);
       return super.handleResponse(messageContext, endpoint);
     }
   
     @Override
     public boolean handleFault(MessageContext messageContext, Object endpoint) throws Exception {
       SaajSoapMessage soapResponse = (SaajSoapMessage) messageContext.getResponse();
       alterSoapEnvelope(soapResponse);
       return super.handleFault(messageContext, endpoint);
     }
   
     private void alterSoapEnvelope(SaajSoapMessage soapResponse) {
       Document doc = soapResponse.getDocument();
       Element rootElement = doc.getDocumentElement();
       rootElement.setPrefix(PREFERRED_PREFIX);
       // Remove default SOAP namespace
       rootElement.removeAttribute(DEFAULT_NS);
       NodeList headerNodes = doc.getElementsByTagNameNS(SOAP_ENV_NAMESPACE, HEADER_LOCAL_NAME);
       NodeList bodyNodes = doc.getElementsByTagNameNS(SOAP_ENV_NAMESPACE, BODY_LOCAL_NAME);
       NodeList faultNodes = doc.getElementsByTagNameNS(SOAP_ENV_NAMESPACE, FAULT_LOCAL_NAME);
       // Remove Header node.
       if (headerNodes.getLength() != 0) {
         rootElement.removeChild(headerNodes.item(0));
       }
       // Change Body's SOAP namespace prefix.
       if (bodyNodes.getLength() != 0) {
         Element bodyElement = (Element) bodyNodes.item(0);
         bodyElement.setPrefix(PREFERRED_PREFIX);
       }
       if (faultNodes.getLength() != 0) {
         Element faultElement = (Element) faultNodes.item(0);
         faultElement.setPrefix(PREFERRED_PREFIX);
       }
     }
   }
   

2. Change package-info.java in the package that contain WSDL generated classes. I've successfully done this with my company's namespace prefix, but it doesn't work for SOAP-ENV prefix.

   @javax.xml.bind.annotation.XmlSchema(namespace = "http://www.example.com/ns/2008/02/02/webservices/blah",
   xmlns = {
     @javax.xml.bind.annotation.XmlNs(namespaceURI = "http://www.example.com/ns/2008/02/02/webservices/blah", prefix = ""),
     @javax.xml.bind.annotation.XmlNs(namespaceURI = "http://schemas.example.com/ns/2007/10/blah", prefix = "ns2"),
     @javax.xml.bind.annotation.XmlNs(namespaceURI = "http://example.com/ns/2007/23/05/blah/fundamental", prefix = "ns3"),
     @javax.xml.bind.annotation.XmlNs(namespaceURI = "http://schemas.xmlsoap.org/soap/envelope/", prefix = "soap") // doesn't work
   },
   elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
   package com.thomsonreuters.ts.ets.interdayws.soap.webservice;
   

Is there an ideal way to change SOAP-ENV to soap in Spring-WS?

By the way, here's the code that set this prefix. StroapElement.java

Answer 1

A better solution

Use SOAPMessage API instead of DOM.

  private void alterSoapEnvelope(SaajSoapMessage soapResponse) {
    try {
      SOAPMessage soapMessage = soapResponse.getSaajMessage();
      SOAPPart soapPart = soapMessage.getSOAPPart();
      SOAPEnvelope envelope = soapPart.getEnvelope();
      SOAPHeader header = soapMessage.getSOAPHeader();
      SOAPBody body = soapMessage.getSOAPBody();
      SOAPFault fault = body.getFault();
      envelope.removeNamespaceDeclaration(envelope.getPrefix());
      envelope.addNamespaceDeclaration(PREFERRED_PREFIX, SOAP_ENV_NAMESPACE);
      envelope.setPrefix(PREFERRED_PREFIX);
      header.setPrefix(PREFERRED_PREFIX);
      body.setPrefix(PREFERRED_PREFIX);
      if (fault != null) {
        fault.setPrefix(PREFERRED_PREFIX);
      }
    } catch (SOAPException e) {
      e.printStackTrace();
    }
  }

It's much faster now.