1 View linked to 2 CompCont: NullPointer Exception

Question

Hi,
Here is the architecture of my app :
MainView --> CompContA --> ModelA (RFC function A)
........|
........|---> IntCompB --> CompContB --> Model B (RFC function B)
And here is the content of the MainView :
AdviceNumber : [
Z2_I_Rechercher_Avis_Input.AdviceNumber) | RefreshButton1
UserId : [Z2_I_Rechercher_Bottin_Input.UserId) | RefreshButton2
Name : [Z2_I_Rechercher_Avis_Input.Output.It_Infos_Bottin.Name) 
Now, my application works when I populate an AdviceNumber and press the RefreshButton1.  At the return, the name field is refreshed and I use some Java code to move the UserId that my function returned to the UserId of the screen. This works well.
Then if I change the value of the UserId in the screen and press the RefreshButton2, the second function returns me another name, and I use some Java code to move this name into the Name field of the screen. This works well too.
The problem is that I can't use the refreshButton2 first!  I get a NullPointer exception.
And I know why, it's because the « Output » structure of my Z2_I_Rechercher_Avis_Input is not initialized (since the refreshButton1 has not been used yet).
But I can't find the right way to code it.
Can you help me, thanks!
Message was edited by:
        Emanuel Champagne

Answer 1

I want the user to click on the button he wants.
I just need to know how to initialize the Output.Struc1 when the user decides to click on the RefreshButton2 First.
It's the line in bold that give me the error (but that line works well when the RefreshButton1 is used first!)
  public void onActionRafraichirAvis(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
    //@@begin onActionRafraichirAvis(ServerEvent)
     //$$begin ActionButton(-775562010)
     wdThis.wdGetAvisCompController().executeZ2_I_Rechercher_Avis_Input();
     //$$end
     // At the return, we need to refresh the values of the screen with the ones returned by the function.
     // Access to the structure showed on the screen
IIt_Infos_BottinElement AvisInfosBottinEl = wdContext
                                                              .nodeIt_Infos_Bottin()
                                                              .currentIt_Infos_BottinElement();
    // Access to the structure received by the RFC function
    IIt_Z2I053TElement BottinEl = wdContext
                                                         .nodeIt_Z2I053T()
                                                         .currentIt_Z2I053TElement();
     <b>AvisInfosBottinEl.setName(BottinEl.getName());</b>
Message was edited by:
        Emanuel Champagne