Copying Elements from one node to another with WDCopyService

[former_member50538]

Hi Gang,

Can you see why this code is not working. To me it should work fine. I have seen a couple of posts regarding this topic but none give a definite yes or no as whether this method works.

I have two RFC's. Each one uses a table of Personnel numbers.

RFC1 fills the table with pernr's and this works fine - I see it on my screen.

RFC2 accepts a table (same structure) of personnel numbers and outputs the names of the people.

So I thought I could simply copy the elements from node Pernr_Tab (output from RFC1) to Pernr_Tab_name(Input for RFC2). But only a blank table is being passed to RFC2

Controller Context

O Context

|-PernrList (Bound to RFC1)

|.|-PernrOutput

|...|-Pernr_Tab (Output from RFC1)

|.....=Pernr

|

- Names (Bound to RFC2) ..

- Output_name ..

.

-Name_Tab (This is blank after RFC2 is called) ..

...=Pernr ..

...=Name ..

..|-Pernr_Tab_name (Source For RFC2)

....=Pernr

public void RFCNameFill( )

{

//@@begin RFCNameFill()

Z_Wd_Name_Input nameInput = new Z_Wd_Name_Input();

wdContext.nodeNames().bind(nameInput);

// Copy all the elements from node Pernr_Tab to node Pernr_Tab_name

WDCopyService.copyElements(wdContext.nodePernr_Tab(), wdContext.nodePernr_Tab_name());

try {

wdContext.currentNamesElement().modelObject().execute();

}

catch (Exception ex){

ex.printStackTrace();

}

wdContext.nodeOutput_name().invalidate();

//@@end

}

[former_member50538]

Yip TWM, that works. I would also like to clear this up. I get very confused as to when I have to use a .set(model node) and yet this solution doesn't use it at all - we are using .add(model node).

So my new working code based on the TWM solution is as follows:

Z_Wd_Name_Input nameInput = new Z_Wd_Name_Input();

wdContext.nodeNames().bind(nameInput);

// Copy all the elements from node Pernr_Tab to node Pernr_Tab_name

//WDCopyService.copyElements(wdContext.nodePernr_Tab(), wdContext.nodePernr_Tab_name());

for (int i=0; i < wdContext.nodePernr_Tab().size(); i++) {

wdContext.nodePernr_Tab().setLeadSelection(i);

Zwd_Pernr currentPernr = new Zwd_Pernr();

WDCopyService.copyCorresponding(wdContext.currentPernr_TabElement(), currentPernr);

nameInput.addPernr_Tab(currentPernr);

}

try {

wdContext.currentNamesElement().modelObject().execute();

}

catch (Exception ex){

ex.printStackTrace();

}

wdContext.nodeOutput_name().invalidate();

My WebDynpro book says "Supply data to the correct instance of the class _Input. This can be done either by:

1) manipulating the context model node to which the object is bound

OR

2) directly manipulating the model object. Direct access to the model object makes the coding easier to read."

I would like to see an example of each. I am not even sure which one of the 2 solutions I am using now ? I think it is number 2 as the code does not reference Context Node "Names" after the second line. I only seem to have to bind the model to the Context Node so that I can see the output in the view.

[Former Member]

Hi Richard,

As far as I understand what I'm doing, I'm manipulating model object.

Manipulating contex model whould be doing something like:

wdContext.nodePernr_Tab().bind({Collection})

The only problem I have, is how to get the collection to be bound from current context ?

[former_member50538]

Thanks, that will be usefull.

However I don't think I will be getting an error from the call to RFC2, it is working correctly - only it is getting no input data to work with. The table contains no values after the WDCopyService ?

[Former Member]

Hi,

I had the same problem: when doing so, content of node is not copied to the other node...

All I could do to force data to go is the following:

for (int i = 0; i < wdContext.nodeReceipts().size(); i++) {
    wdContext.nodeReceipts().setLeadSelection(i);
    Ptrv_Receipts receipt = new Ptrv_Receipts();
    WDCopyService.copyCorresponding(wdContext.currentReceiptsElement().modelObject(), receipt);
    tripChangeInput.addReceipts(receipt);
}

If someone knows a better way of doing, I'm also interested in...

Anyway Richard, this is a workaround, but it works...

[Former Member]

Hi,

Instead of writing

 ex.printStackTrace();

in catch expression try using

wdComponentAPI.getMessageManager().reportException(ex.getMessage(),false);

add one message area control to view.

You may get the exact error message which can help you in solving the issue.

NEx