How to use a cascading LOV as a Web Services Consumer?

Question

How to use a cascading LOV as a Web Services Consumer?
We are trying to populate a prompt programmatically.
Our program is a Web Services Consumer.
As an example we use Island Resorts Marketing
The cascading LOV for City is
Country -> Region -> City
The City object is key-aware to the customer table
The query is
Customer | Revenue
(where) City = [prompt]
In order to make the key-awareness work, we must select the value (rowIndex) from the LOV
When we run our program below, the LOV for City is not populated, as expected since we must first select the Country, then the Region.
The code snippet below shows that the LOV for Country is populated. We have no idea how to go from there.
Any hint will be immensely appreciated.
Let us know if anything is unclear in the code.
Source       
RetrieveMustFillInfo retrieveMustFillInfo = RetrieveMustFillInfo.Factory.newInstance();
        RetrievePromptsInfo retrievePromptInfo = RetrievePromptsInfo.Factory.newInstance();
        retrievePromptInfo.setPromptLOVRetrievalMode(PromptLOVRetrievalMode.ALL);
        retrievePromptInfo.setRefreshReturnedLOVs(true);
        retrievePromptInfo.setReturnLOVOnMustFillPrompts(true);
        retrieveMustFillInfo.setRetrievePromptsInfo(retrievePromptInfo);
        // *-- need the "Refresh" action to get the .promptToBeFilled
        Action[] boActions = new Action[1];
        boActions[0] = Refresh.Factory.newInstance();
        try {
            documentInformation = reportEngine.getDocumentInformation(Integer.toString(infoObject.getID()), retrieveMustFillInfo, boActions, null, null);
            m_Token = documentInformation.getDocumentReference();
        } catch (Exception ex) {
            System.out.println(GetWSError(ex));
            return;
        if (documentInformation.getMustFillPrompts()) {
            PromptInfo[] promptInfoS = documentInformation.getPromptInfoArray();
            for (PromptInfo promptInfo : promptInfoS) {
                System.out.println(String.format("Prompt '%1$s', hasLOV=%2$s", promptInfo.getName(), (promptInfo.getHasLOV() ? "Yes" : "No")));
                if (promptInfo.getHasLOV()) {
                    LOV boLOV = promptInfo.getLOV();
                    for (Value boLOVValue : boLOV.getValuesArray()) {
                        System.out.println(String.format(" LOV item '%1$s' RowIndex=%2$s", boLOVValue.getColumnsArray(0), (boLOV.getRowIndexed() ? boLOVValue.getRowIndex() : "")));
                System.out.println("--End LOV");
                PromptInfo[] promptInfoS2 = promptInfo.getPromptToBeFilledArray();
                if (promptInfoS2.length > 0) {
                    PromptInfo promptInfo2 = promptInfoS2[0];
                    System.out.println(String.format(" linked to %1$s", promptInfo2.getName()));
                    if (promptInfo2.getHasLOV()) {
                        LOV boLOV2 = promptInfo2.getLOV();
                        for (Value boLOVValue : boLOV2.getValuesArray()) {
                            System.out.println(String.format(" LOV item '%1$s' RowIndex=%2$s", boLOVValue.getColumnsArray(0), (boLOV2.getRowIndexed() ? boLOVValue.getRowIndex() : "")));
                        System.out.println("--End LOV");
Result
Prompt 'Enter value(s) for City:', hasLOV=Yes
--End LOV
linked to Enter value for Country of origin
LOV item 'Australia' RowIndex=6
LOV item 'France' RowIndex=2
LOV item 'Germany' RowIndex=4
LOV item 'Holland' RowIndex=7
LOV item 'Japan' RowIndex=5
LOV item 'UK' RowIndex=3
LOV item 'US' RowIndex=1
--End LOV

Answer 1

Hi,
Refer SAP Note 1278947. You would require a Service Market Place logon to access this article.
Let me know if this helps.
Regards,
Shreyans Surana