Get the return value of an RFC function / BAPI

Question

Hello,
I'm a Web Dynpro Java beginner and I try to get the return value (domain: NUMC6) of an RFC function without success.
Here is what I do, could you please tell me what is wrong?
First, here is my context:
Context
|
|---- ZMy_Bapi
     |
     |---- MyOutputResult
     |     |
     |     |---- MyReturnValue
     |
     |---- MyInput
My model:
MyModel
|
|---- ZMy_Bapi_Input
     |
     |---- Output
     |     |
     |     |---- ZMy_Bapi_Output
     |          |
     |          |---- Return_Value
     |
     |---- Input_Value
The mapping between them:
- MyInput is mapped to Input_Value
- MyReturnValue is mapped to Return_Value
And my code:
ZMy_Bapi_Input bapiInput = new ZMy_Bapi_Input();
wdContext.nodeZMy_Bapi().bind(bapiInput);
bapiInput.setInput_Value("A value");
executeZMy_Bapi();
ZMy_Bapi_Output bapiOutput = new ZMy_Bapi_Output();
wdContext.nodeMyOutputResult().bind(bapiOutput);
IMyOutputResultElement outputElement = wdContext.nodeMyOutputResult().currentMyOutputResultElement();
String result = outputElement.getMyReturnValue();
Finally, here is the code of the executeZMy_Bapi() function:
try {
     wdContext.currentZMy_BapiElement().modelObject().execute();
     wdContext.nodeMyOutputResult().invalidate();
} catch (Exception ex) {
     ex.printStackTrace();
My problem is that "result" keeps being empty
Thanks in advance for your help!

Answer 1

It still doesn't work, I'm gonna turn crazy!
But there is one good point: I get the method you mentioned: getZMy_Bapi_OutputElementAt and getMyReturnValue without casting, just as you said first.
Here are the updated context, model, mapping and code.
Context:
MyContext
|
|---- ZMy_Bapi
     |
     |---- MyOutputResult
     |     |
     |     |---- ZMy_Bapi_Output
     |          |
     |          |---- MyReturnValue
     |
     |---- MyInput
Model:
MyModel
|
|---- ZMy_Bapi_Input
|     |
|     |---- Output
|     |     |
|     |     |---- ZMy_Bapi_Output
|     |          |
|     |          |---- Return_Value
|     |
|     |---- Input_Value
|
|
|---- ZMy_Bapi_Output
     |
     |---- Return_Value
Mapping
ZMy_Bapi     --> ZMy_Bapi_Input
MyOutputResult     --> Output
ZMy_Bapi_Output     --> ZMy_Bapi_Output
MyReturnValue     --> Return_Value
MyInput          --> Input_Value
Code
ZMy_Bapi_Input bapiInput = new ZMy_Bapi_Input();
wdContext.nodeZMy_Bapi().bind(bapiInput);
bapiInput.setInput_Value("A value");
executeZMy_Bapi();
ZMy_Bapi_Output bapiOutput = new ZMy_Bapi_Output();
wdContext.nodeMyOutputResult().bind(bapiOutput);
String result = "";
for (int i = 0; i < wdContext.nodeZMy_Bapi_Output().size(); i++) {
     IZMy_Bapi_OutputElement resultElem = wdContext.nodeZMy_Bapi_Output().getZMy_Bapi_OutputElementAt(i);
     if (resultElem.getMyReturnValue() != "" && resultElem.getMyReturnValue() != null) {
          result = resultElem.getMyReturnValue();
Edited by: Franis Pignon on Oct 17, 2008 11:16 PM