RFC is not returning parameters

Question

Hi All,
I have written an Java code in my UDF to call the RFC. Basically i am sending some Import parameters to RFC and getting the Export parameters from the RFC. My RFC structure is like this.
XX_RFC
    IMPORT
       a
       b
    EXPORT
       c
       d
       e
My UDF code (Queue) is :
AbstractTrace trace;
java.util.Map map;
map = container.getTransformationParameters();
trace = container.getTrace();
trace.addDebugMessage(" XX_RFC lookup started ");
String strSystem =  (String) map.get(StreamTransformationConstants.RECEIVER_SERVICE);
String[] tagNames = { "a", "b"};
ArrayList arrayList = new ArrayList();
int iNoOfValuesToBeSet = a.length;
try {
     RFCLookup rfcl = new RFCLookup("XX_RFC");
     rfcl.setConn(strSystem,"RFCLookUp_Receiver");
     arrayList.add(a);
     arrayList.add(b);
     rfcl.setTable(arrayList, "IMPORT", tagNames, iNoOfValuesToBeSet);
     trace.addInfo(" Table set. Going to invoke RFC.");
     trace.addDebugMessage("\n Start of Request XML \n" + rfcl.getRequestRoot() + "\n *** End of Request XML *** \n");
     rfcl.invoke();
     trace.addInfo("RFC invoked. Parsing the Response.");
     trace.addInfo("\n Start of Response XML \n" + rfcl.getResponseRoot() + "\n *** End of Response XML *** \n");
     strArrTempOut1 = rfcl.getParam("EXPORT", "c");
     strArrTempOut2 = rfcl.getParam("EXPORT", "d");
     strArrTempOut3 = rfcl.getParam("EXPORT", "e");
}catch (Exception e) {
     trace.addWarning("!!! Exception caught !!! " + e+ " : \n" + e.toString());
finally
I have declared all the global variables in the Java section and i am writing an UDF for using those global variables.
the UDF (Queue) is :
if(strArrTempSTRASOut == null)
  result.addValue("");
else
for (int i=0;i<strArrTempOut1.length;i++)
                     result.addValue(strArrTempOut1<i>);
When i call the RFC with a valid data, my output XML is not getting formed actually. But, the RFC is working fine when i check it in the SAP system. Any help would be greatly appreciated.
regards,
Sherin Jose P

Answer 1

Hi Sherin,
       Please refer the following blog to acehive your Functionaliy.Its very simple to use and .Because the lookup code gives you RFC response  as XML. apply the DOm parisng code to get the desired value from the output XML structure.Follow the article and use the following piece of code in the 5th step of the code given in the article.
http://www.sdn.sap.com/irj/scn/index;jsessionid=(J2EE3417400)ID0702528050DB00626426829334031456End?rid=/library/uuid/a03e7b02-eea4-2910-089f-8214c6d1b439&overridelayout=true
*5. Execute lookup.*
       Payload result = accessor.call(payload);
       InputStream in = result.getContent();
     /*  out = new ByteArrayOutputStream(1024);
       byte[] buffer = new byte[1024];
       for (int read = in.read(buffer); read > 0; read = in.read(buffer))
       out.write(buffer, 0, read);
       content = out.toString();*/  you can avoid the commented code
       DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
       DocumentBuilder builder = factory.newDocumentBuilder();
       Document document = builder.parse(in);
       NodeList list = document.getElementsByTagName("C"); //same way for D, E
       Node node = list.item(0);
       if (node != null) {
            node = node.getFirstChild();
            if (node != null) {
                  Cvalue = node.getNodeValue(); //Desired value of C in string
Thanks,
Ram.