DII with multiple OUT parameters?

Question

Is it possible to use DII to invoke a web service that has more that one output parameter?
My attempts are shown below but I only get a variety of different exceptions. If anyone
has a working example, then I would be most grateful for their advice. I am using
JWSDP 1.5 & Tomcat 5.0:
--- DII client ---
package testclient;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.xml.namespace.QName;
import javax.xml.rpc.Call;
import javax.xml.rpc.Service;
import javax.xml.rpc.ServiceFactory;
import javax.xml.rpc.ParameterMode;
import javax.xml.rpc.encoding.XMLType;
import javax.xml.rpc.holders.*;
public class Test
  private static String serviceuri = "urn:magenta/wsdl/p2p";
  private static String servicewsdl = "http://localhost:8080/client/Client?WSDL";
  private static String servicename = "clientService";
  private static String serviceport ="clientPort";
  private static String NS_XSD = "http://www.w3.org/2001/XMLSchema";
  public static void main(String[] args)
    try
      ServiceFactory factory = ServiceFactory.newInstance();
      Service service = factory.createService(new QName(serviceuri, servicename));
      Call call = service.createCall(new QName(serviceuri, serviceport));
      call.setTargetEndpointAddress(servicewsdl);
      call.setProperty(Call.SOAPACTION_USE_PROPERTY, new Boolean(true));
      call.setProperty(Call.SOAPACTION_URI_PROPERTY, "");
      call.setProperty("javax.xml.rpc.encodingstyle.namespace.uri", "http://schemas.xmlsoap.org/soap/encoding/");
      call.setProperty(Call.OPERATION_STYLE_PROPERTY, "rpc");
      call.setOperationName(new QName(serviceuri, "getQuery"));
      call.setReturnType(null);
      call.addParameter("node", new QName(NS_XSD, "string"), ParameterMode.OUT);
      call.addParameter("filename", new QName(NS_XSD, "string"), ParameterMode.OUT);
      ArrayList argterms = new ArrayList();
      argterms.add("");
      argterms.add("");
      Object result = call.invoke(argterms.toArray(new Object[argterms.size()]));
      Map results = call.getOutputParams();
      System.out.println((String)results.get("node"));
      System.out.println((String)results.get("filename"));
    catch (javax.xml.rpc.ServiceException se) { System.out.println("Service Exception: " + se.toString()); }
    catch (java.rmi.RemoteException re) { System.out.println("Remote Exception: " + re.toString()); }
}-- Example Service --
package client;
import java.util.*;
import java.io.*;
import javax.xml.rpc.holders.*;
public class MyClient implements Client
  public MyClient() {}
  public void getQuery(StringHolder node, StringHolder filename) throws java.rmi.RemoteException
    node.value = "n1";
    filename.value = "f2";
}-- WSDL Description --
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<definitions name="client" targetNamespace="urn:magenta/wsdl/p2p" xmlns="http://schemas.xmlsoap.org/wsdl/">
    <message name="getQuery" />
    <message name="getQueryResponse" >
        <part name="node" type="ns1:string" xmlns:ns1="http://www.w3.org/2001/XMLSchema"/>
        <part name="filename" type="ns2:string" xmlns:ns2="http://www.w3.org/2001/XMLSchema"/>
    </message>
    <portType name="client" >
        <operation name="getQuery">
            <input message="ns3:getQuery" xmlns:ns3="urn:magenta/wsdl/p2p"/>
            <output message="ns4:getQueryResponse" xmlns:ns4="urn:magenta/wsdl/p2p"/>
        </operation>
    </portType>
    <binding name="clientBindings" type="ns5:client" xmlns:ns5="urn:magenta/wsdl/p2p" >
        <ns6:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http" xmlns:ns6="http://schemas.xmlsoap.org/wsdl/soap/"/>
        <operation name="getQuery">
            <ns7:operation soapAction="" xmlns:ns7="http://schemas.xmlsoap.org/wsdl/soap/"/>
            <input name="getQuery">
                <ns8:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="urn:magenta/wsdl/p2p" use="encoded" xmlns:ns8="http://schemas.xmlsoap.org/wsdl/soap/"/>
            </input>
            <output name="getQueryResponse">
                <ns9:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="urn:magenta/wsdl/p2p" use="encoded" xmlns:ns9="http://schemas.xmlsoap.org/wsdl/soap/"/>
            </output>
        </operation>
    </binding>
    <service name="clientService" >
        <port binding="ns10:clientBindings" name="clientPort" xmlns:ns10="urn:magenta/wsdl/p2p">
            <ns11:address location="http://localhost:8080/client" xmlns:ns11="http://schemas.xmlsoap.org/wsdl/soap/"/>
        </port>
    </service>
</definitions>--- ERROR MESSAGES ---
1) With this code, I get the following error:
Remote Exception: java.rmi.RemoteException: JAXRPCTIE01: caught exception while handling request: deserialization error: unexpected XML reader state. expected: END but found: START: {http://www.w3.org/2001/XMLSchema}anySimpleType
This suggests a problem with the argterms.add(""); lines, so:
2) If I replace argterms.add(""); with argterms.add(null); I get:
Exception in thread "main" serialization error: java.lang.IllegalArgumentException: getSerializer requires a Java type and/or an XML type
at com.sun.xml.rpc.encoding.ObjectSerializerBase.serialize(ObjectSerializerBase.java:132)
at com.sun.xml.rpc.client.StreamingSender._writeRequest(StreamingSender.java:637)
at com.sun.xml.rpc.client.StreamingSender._send(StreamingSender.java:83)
at com.sun.xml.rpc.client.dii.CallInvokerImpl.doInvoke(CallInvokerImpl.java:79)
at com.sun.xml.rpc.client.dii.BasicCall.invoke(BasicCall.java:482)
at testclient.Test.main(Unknown Source)
3) If I replace argterms.add(""); with argterms.add(new StringHolder("")); I get:
Exception in thread "main" serialization error: java.lang.NullPointerException
at com.sun.xml.rpc.encoding.ObjectSerializerBase.serialize(ObjectSerializerBase.java:132)
at com.sun.xml.rpc.client.StreamingSender._writeRequest(StreamingSender.java:637)
at com.sun.xml.rpc.client.StreamingSender._send(StreamingSender.java:83)
at com.sun.xml.rpc.client.dii.CallInvokerImpl.doInvoke(CallInvokerImpl.java:79)
at com.sun.xml.rpc.client.dii.BasicCall.invoke(BasicCall.java:482)
at testclient.Test.main(Unknown Source)
4) If I remove the argterms.add(""); lines altogether (as these should not be necessary) then I get the following:
Exception in thread "main" unexpected element name: expected=filename, actual=node
at com.sun.xml.rpc.encoding.soap.SOAPResponseSerializer.doDeserialize(SOAPResponseSerializer.java:350)
at com.sun.xml.rpc.encoding.ObjectSerializerBase.deserialize(ObjectSerializerBase.java:192)
at com.sun.xml.rpc.encoding.ReferenceableSerializerImpl.deserialize(ReferenceableSerializerImpl.java:155)
at com.sun.xml.rpc.client.dii.CallInvokerImpl._readFirstBodyElement(CallInvokerImpl.java:285)
at com.sun.xml.rpc.client.StreamingSender._send(StreamingSender.java:215)
at com.sun.xml.rpc.client.dii.CallInvokerImpl.doInvoke(CallInvokerImpl.java:79)
at com.sun.xml.rpc.client.dii.BasicCall.invoke(BasicCall.java:482)
at testclient.Test.main(Unknown Source)
The final message suggests that the arguments are being apssed in the wrong order. However, if I
change the order of the call.addParameter lines then I still get the same message. At this point I
am suspecting a bug in the JWSDP? Can anyone shed some light on the situation?
Thanks,
Chris

Answer 1

Forgot to mention, I also tried adding parameterOrder to the WSDL to overcome problem 4, but it didn't have any effect:
<operation name="getQuery" parameterOrder="node filenmame">