Axis2: passing an ArrayList to a webservice

[Pramod Chris]

Hi,
I don't know if this has been discussed already. I am new to web services and axis2 in particular. I have a web service with a method that takes an ArrayList as a parameter. the ArrayList further has a Hashtable as one of its elements.
when i call the web service from a client, passing the ArrayList as the input, on the server side (at the web service), i am getting <empty>false</empty>. is this a problem of serializing and deserializing paramters? the client code snippet is below..

 
            RPCServiceClient service = new RPCServiceClient();
            Options options = service.getOptions();
            EndpointReference targetEPR = new EndpointReference(
                <endpoint> :wink: ;
    options.setTo(targetEPR);
 
            Object[] args = new Object[3];
            args[0] = "param1";
            args[1] = "param2";
 
            Hashtable user = new Hashtable();
            user.put("key","val1");
 
            ArrayList argumentList = new ArrayList();
            argumentList.add(user);
            argumentList.add("version 1.0");
 
            args[2]= argumentList;
 
            Class[] returnTypes = new Class[]{Object.class};
            Object[] returnObjArr = service.invokeBlocking(new      
                     QName(<namespace>,  
                     "service"), args, returnTypes);

and my services.xml look like this...

<service name="WebServiceRPC" scope="application">
    <description>
        Test Web Service
    </description>
    <messageReceivers>
        <messageReceiver mep="http://www.w3.org/2004/08/wsdl/in-only"
                         class="org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver"/>
        <messageReceiver mep="http://www.w3.org/2004/08/wsdl/in-out"
                         class="org.apache.axis2.rpc.receivers.RPCMessageReceiver"/>
    </messageReceivers>
    <parameter name="ServiceClass">com.test.ws.endpoint.WebServiceRPC</parameter>
 
</service>

when i print out the arraylist in the webservice it prints <empty>false</empty>
any idea what the issue is?

thanks in advance!

[Razi Abbas]

Pramod,
While I am no guru on webservices interfaces ... I feel s=you should be able to resolve the problem, if you modify the interface to use Arrays instead of ArrayList. To my feeling (not sure) .. xml has support for Arrays and not for ArrayList ... so the change might be an easy way to solve the issue ...

cheers ...

Razi