Java syntax error : RFC Lookup

Question

My UDF Source code has an syntax error: missing return statement }
but i can´t find the error.
any ideas ?
//write your code here
String content = "";
MappingTrace importanttrace;
importanttrace = container.getTrace();
// filling the string with our RFC-XML (with values)
String m ="<?xml version="1.0" encoding="UTF-8"?><ns0:Z_GET_PRODH xmlns:ns0="urn:sap-com:document:sap:rfc:functions"><IN_MATNR>2100018693</IN_MATNR></ns0:Z_GET_PRODH>";
RfcAccessor accessor = null;
ByteArrayOutputStream out = null;
try
     // 1. Determine a channel (Business system, Communication channel)
     Channel channel = LookupService.getChannel("xxxxxxxxxx","yyyyyyyy");
     // 2. Get a RFC accessor for a channel.
     accessor = LookupService.getRfcAccessor(channel);
     // 3. Create a xml input stream representing the function module request message
     InputStream inputStream = new ByteArrayInputStream(m.getBytes());
     // 4. Create xml payload
     XmlPayload payload = LookupService.getXmlPayload(inputStream);
     // 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();
catch(LookupException e)
     importanttrace.addWarning("Error while lookup " + e.getMessage() );
catch(IOException e)
     importanttrace.addWarning("Error " + e.getMessage() );
finally
     if (out!=null)
           try
          out.close();
           catch (IOException e)
               importanttrace.addWarning("Error while closing stream " + e.getMessage() );
     // 7. close the accessor in order to free resources.
     if (accessor!=null)
           try
          accessor.close();
           catch (LookupException e)
               importanttrace.addWarning("Error while closing accessor " + e.getMessage() );
Message was edited by:
        Gordon Breuer

Answer 1

I have a solution without DOM parser. The XML code is seen as a sting and the code looks for a specific tag. In my case it is OUTPUT, you can adjust the code to your tag.
String content = "";
MappingTrace importanttrace;
importanttrace = container.getTrace();
// filling the string with our RFC-XML (with values)
String m = "<rfc:ZZSG_TEST_XSLT_LOOKUP xmlns:rfc="urn:sap-com:document:sap:rfc:functions">"
                            + "<INPUT>" + request + "</INPUT></rfc:ZZSG_TEST_XSLT_LOOKUP>";
RfcAccessor accessor = null;
ByteArrayOutputStream out = null;
try
// 1. Determine a channel (Business system, Communication channel)
Channel channel = LookupService.getChannel("Airline_Group_Two","RFC");
// 2. Get a RFC accessor for a channel.
accessor = LookupService.getRfcAccessor(channel);
// 3. Create a xml input stream representing the function module request message.
InputStream inputStream = new ByteArrayInputStream(m.getBytes());
// 4. Create xml payload
XmlPayload payload = LookupService.getXmlPayload(inputStream);
// 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();
catch(LookupException e)
importanttrace.addWarning("Error while lookup " + e.getMessage() );
catch(IOException e)
importanttrace.addWarning("Error " + e.getMessage() );
finally
if (out!=null) {
try {
out.close();
} catch (IOException e) {
importanttrace.addWarning("Error while closing stream " + e.getMessage() );
// 7. close the accessor in order to free resources.
if (accessor!=null) {
try {
accessor.close();
} catch (LookupException e) {
importanttrace.addWarning("Error while closing accessor " + e.getMessage() );
//returning the result – RFC-XML.response
  int start = content.indexOf("<OUTPUT>") + 8;
  int end = content.indexOf("</OUTPUT>");
  if (end > start && start > 8)
    content = content.substring(start,end);
return content;