*** Serialization in SOAP ***

Question

Hi,
I m building a web service with Jdeveloper 9.0.3 . I m trying to pass org.w3c.dom.Document in the function argument but got the following error:
No Serializer found to serialize a 'org.w3c.dom.DOMImplementation' using encoding style 'http://schemas.xmlsoap.org/soap/encoding/'. [java.lang.IllegalArgumentException]
Help,pls.
Gary

Answer 1

Ok, at the end of this e-mail see the stub that was generated from the Oracle9iAS side and a main method that calls your Web service - this should get you going. Before the code I will give you the steps I did:
1. Make sure you delete the Web service you have deployed to OC4J before starting again (e.g. delete the directories <oc4j_home>\j2ee\home\application-deployments\gt-gt-WS, <oc4j_home>\j2ee\home\applications\gt-gt-WS, delete the file gt-gt-WS.ear from the <oc4j_home>\j2ee\home\applications\ directory and edit the file server.xml and remove the line: "<application name="gt-gt-WS" path="../applications/gt-gt-WS.ear" auto-start="true" />"
2. Delete the stub/proxy you have generated from the JDeveloper WSDL
3. Build your class as you did with a document parameter and return result
4. Wrap it as a Web service using the JDev publishing wizard
5. New step I missed previously: Before deploying to Oracle9iAS, right mouse click on the WebServices.deploy node and:
* Select settings
* Navigate to the classes node of the configuration tree
* De-select the WSDL file
* Exit from the configuration wizard by clicking on the OK button
6. Deploy to Oracle9iAS by right mouse clicking on the Webservices.deploy node
7. Go to the Web service endpoint (in your case: http://<your machine>:8888/gt-gt-context-root/XMLDocWS) in your browser. This can be found by editing the Web service node in JDeveloper and selecting "File Locations" and copying the URL in the field "Web service endpoint"
8. From the endpoint page, copy the "Service Description" URL (i.e. the WSDL location) (e.g. CTRL-C). On mine, the URL is: http://<my machine>:8888/gt-gt-context-root/XMLDocWS?WSDL
9. Go back to JDeveloper and in the project right mouse click on the project and select New->Web Service Stub/Skeleton.
10. In the WSDL location, paste in the WSDL location you copied from the Web Service endpoint (http://<my machine>:8888/gt-gt-context-root/XMLDocWS?WSDL)
11. Generate the new stub as normal.
12. For a quick test copy in the main method I built below.
From this point onwards your servlet you sent me should work.
For others watching this thread, as this problem is generic, here is the service implementation:
import org.w3c.dom.*;
import oracle.xml.parser.v2.*;
public class XMLDocWS
     public XMLDocWS()
     public Document query(org.w3c.dom.Document req)
Document res = req;
          return res;
Here is the stub that can be used to test it once you have published the above as a Web Service:
import java.util.Vector;
import java.net.URL;
import java.util.Properties;
import java.util.HashMap;
import org.apache.soap.rpc.Call;
import org.apache.soap.rpc.Parameter;
import org.apache.soap.rpc.Response;
import org.apache.soap.Fault;
import org.apache.soap.SOAPException;
import org.apache.soap.Constants;
import org.apache.soap.encoding.SOAPMappingRegistry;
import org.apache.soap.encoding.soapenc.BeanSerializer;
import org.apache.soap.util.xml.QName;
import oracle.soap.transport.http.OracleSOAPHTTPConnection;
import oracle.soap.encoding.soapenc.EncUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import oracle.xml.parser.v2.*;
* Web service proxy: IXMLDocWS
* generated by Oracle WSDL toolkit (Version: 1.0).
public class IXMLDocWSProxy {
public static void main(String[] args)
try
IXMLDocWSProxy stub = new IXMLDocWSProxy();
XMLDocument doc = new XMLDocument();
Element elAdd = doc.createElement("employee");
Element elA = doc.createElement("name");;
elA.appendChild(doc.createTextNode("Mike"));
elAdd.appendChild(elA);
doc.appendChild(elAdd);
org.w3c.dom.Document in = (org.w3c.dom.Document)doc;
org.w3c.dom.Document out = stub.query(in);
XMLDocument out_print = (XMLDocument)out;
((XMLElement)out_print.getDocumentElement()).print(System.out);
} catch (Exception ex)
ex.printStackTrace();
public IXMLDocWSProxy() {
m_httpConnection = new OracleSOAPHTTPConnection();
_setMaintainSession(true);
Object untypedParams[] = {
new String("query"), new String("output"), new QName("http://xmlns.oracle.com/2001/XMLSchema/DOM","org.w3c.dom.Document")
String operationName;
String paramName;
QName returnType;
SOAPMappingRegistry registry;
org.apache.soap.util.xml.Deserializer deserializer;
int x;
for (x = 0; x < untypedParams.length; x += 3) {
operationName = (String) untypedParams[x];
paramName = (String) untypedParams[x+1];
returnType = (QName) untypedParams[x+2];
registry = (SOAPMappingRegistry) m_soapMappingRegistries.get(operationName);
if (registry == null) {
if (m_soapMappingRegistry != null) {
registry = new SOAPMappingRegistry(m_soapMappingRegistry);
} else {
registry = new SOAPMappingRegistry();
m_soapMappingRegistries.put(operationName,registry);
try {
deserializer = registry.queryDeserializer(returnType,Constants.NS_URI_SOAP_ENC);
registry.mapTypes(Constants.NS_URI_SOAP_ENC, new QName("",paramName), null, null, deserializer);
} catch(IllegalArgumentException e) {
public org.w3c.dom.Document query(org.w3c.dom.Document param0) throws Exception {
String soapActionURI = "urn:IXMLDocWS/query";
String encodingStyleURI = "http://schemas.xmlsoap.org/soap/encoding/";
Vector params = new Vector();
params.add(new Parameter("param0", org.w3c.dom.Document.class, param0, null));
Response response = makeSOAPCallRPC("query", params, encodingStyleURI, soapActionURI);
Parameter returnValue = response.getReturnValue();
return (org.w3c.dom.Document)returnValue.getValue();
private Response makeSOAPCallRPC(String methodName, Vector params, String encodingStyleURI, String soapActionURI) throws Exception {
Call call = new Call();
call.setSOAPTransport(m_httpConnection);
SOAPMappingRegistry registry;
if ((registry = (SOAPMappingRegistry)m_soapMappingRegistries.get(methodName)) != null)
call.setSOAPMappingRegistry(registry);
else if (m_soapMappingRegistry != null)
call.setSOAPMappingRegistry(m_soapMappingRegistry);
call.setTargetObjectURI(m_serviceID);
call.setMethodName(methodName);
call.setEncodingStyleURI(encodingStyleURI);
call.setParams(params);
Response response = call.invoke(new URL(m_soapURL), soapActionURI);
if (response.generatedFault()) {
Fault fault = response.getFault();
throw new SOAPException(fault.getFaultCode(), fault.getFaultString());
return response;
public String _getSoapURL() {
return m_soapURL;
public void _setSoapURL(String soapURL) {
m_soapURL = soapURL;
public String _getServiceID() {
return m_serviceID;
public void _setServiceID(String serviceID) {
m_serviceID = serviceID;
public SOAPMappingRegistry _getSOAPMappingRegistry() {
return m_soapMappingRegistry;
public void _setSOAPMappingRegistry(SOAPMappingRegistry soapMappingRegistry) {
m_soapMappingRegistry = soapMappingRegistry;
public boolean _getMaintainSession() {
return m_httpConnection.getMaintainSession();
public void _setMaintainSession(boolean maintainSession) {
m_httpConnection.setMaintainSession(maintainSession);
public Properties _getTransportProperties() {
return m_httpConnection.getProperties();
public void _setTransportProperties(Properties properties) {
m_httpConnection.setProperties(properties);
public String _getVersion() {
return m_version;
private String m_serviceID = "urn:IXMLDocWS";
private String m_soapURL = "http://mlehmann-lap.us.oracle.com:8888/gt-gt-context-root/XMLDocWS";
private OracleSOAPHTTPConnection m_httpConnection = null;
private SOAPMappingRegistry m_soapMappingRegistry = null;
private String m_version = "1.0";
private HashMap m_soapMappingRegistries = new HashMap();
Mike.