Client unable to get the javax.activation.DataHandler object from Server

Question

Hi All,
I am trying to download the file from the server to the client using Javax.Activation.Data Handler object with IBM web services. But server always returning the Data Handler object is null. I am wondering why it is behaving like this.
My requirement is add the file to the Data Handler object from the server and read the same from the client. But I am always getting Data Handler object is  null at the client place.
Please see the client side code and server side code below.
Server side Code:
This is the simple web service method, its creating the Data Handler object and adding it to the Hash Map and returning the Hash Map object to the client.
public Hashtable download()
          DataHandler dh = null;
          HashMap hashMap =new HashMap();
          try{
               //Sample test files contains data
               String downLoadFName="C:/ADP/downLoadData.txt";
               //Creating the DataHandler Object with sample file
               dh      =      new DataHandler(new FileDataSource(new File(downLoadFName)));
               //Keeping the DataHandler object in the HashMap.
               hashMap.put("DATAHANDLER",dh);
               //keeping the sample test message object in the HashMap
               hashMap.put("TEST","Keeping the DataHandler and test messages in the hashTable");                         
          }catch(Exception e){
               logger.error("Error :while sending the data:"+e.getMessage(), e);
          //retrun the HashMap object to the client.
          return hashMap;
Client Side Code:
This is the simple client code, and connecting to the server and invoking the web service method
//This is the client code,Just invoking the webservice method from the Webspehre server.
public class WebserviceClient {
     static DocumentTransfer controller     =     null;
     public static void main(String args[]){     
            DocumentTransferService service          =     null;
          try{
               //Creating the service Object
               service               =     new DocumentTransferServiceLocator();
               //Getting the Server connection
                controller          =      (DocumentTransfer)service.getDocumentTransfer(new java.net.URL("http://localhost:9081/eNetsRuntimeEngine/services/DocumentTransfer"));
                //Calling the download method from the server and it returns HashMap object.
               HashMap hashMap     = controller.download();
               //Getting the DataHandler Object from the HashMap
                DataHandler dh=(DataHandler)hashMap.get("DATAHANDLER");
               System.out.println("DATAHANDLER: :"+dh);
               //Getting the String object from the HashMap.
               String message=(String)hashMap.get("TEST");
               System.out.println(": :"+message);
           }catch(Exception e){
                System.out.println("Exception :Not able to get the file :"+e.getMessage());
Could you please give me some inputs on this?
Thanks in advance,
Sreeni.

Answer 1

Hi Stif,
Thanks for your response.I did debug from server side,it has printing content of Data Handler properly.
Also i have debug request and response messages using TCP/IP monitor(RAD environment has this feature).The response from the server is going proplery.
But the client side Data Handler is coming null.
Any advice or solution would be greatly appreciated.
Thanks,
Sreeni.