Sample Java WebDynPro calling Customer Details BAPI does not work

Question

Hi,
I have created a sample application (referring SAP's tutorials for Java WebDynPro) which invokes the BAPI_BUPA_ADDRESS_GETDETAIL Bapi.( for reading Customer Address details)
I've made only one view which takes in BusinessPartner as the input and a form for the output.
Have created a model for this purpose and a custom controller.
I've mapped the appropriate fields for both the contexts of View and the Custom Controller.
The Application has been built and deployed on the server. The Jco connections have been configured and tested.
However, Nothing happens when the user enters a business partner input and clicks on the related button to bring up the output.
This WebDynPro has been designed the exact same way as the SAP provided tutorial at
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/webcontent/uuid/28113de9-0601-0010-71a3-c87806865f26?rid=/library/uuid/49f2ea90-0201-0010-ce8e-de18b94aee2d#15 [original link is broken]
Code has been implemented in the implementation tabs of the view and the custom controller the same way too.
Any ideas?
Thanks,
Raman

Answer 1

Implementation tab of Custom Controller
  public void wdDoInit()
    //@@begin wdDoInit()
    Bapi_Bupa_Address_Getdetail_Input input = new Bapi_Bupa_Address_Getdetail_Input();
    wdContext.nodeBapiCall().bind(input);
    input.setBusinesspartner(new String());
    //@@end
  public void executeBapi( )
    //@@begin executeBapi()
    try
         wdContext.currentBapiCallElement().modelObject().execute();
         wdContext.nodeOutput().invalidate();         
    catch (Exception ex)
         ex.printStackTrace();
    //@@end
Custom Controller Binding With Model
Context
  *BapiCall
    *Output
       *Bapiadtel $$$
         *Field A
         *Field B and so on
    *BusinessPartner $$$
Fields marked with $$$ above are mapped to Bapi_Bupa_Address_GetDetail_Input's Bapiadtel and BusinessPartner.
View Binding with Custom Controller
Context
  *BapiStart
    *Output
       *Bapiadtel @@@
         *Field A
         *Field B and so on
    *BusinessPartner @@@
Fields marked with @@@ above are mapped to BapiCall's(Custom Ctrllr) Bapiadtel and BusinessPartner.
Thanks.