Mapping in XI - cannot access Global Container parameters

Question

Hi all,
we have the following problem in graphical XI mapping.
Trying to retrieve the run-time value of a global parameter, we cannot access the value itself (e.g. test using "display queue" menu).
We use 2 simple user-defined functions (getIdoc and corresponding setIdoc).
The source code for our custom get/set methods is:
public String getIdoc(Container container){
// This is a CUSTOM global parameter set <- cannot get the value itself
//String codMsgExport = (String) container.getGlobalContainer().getParameter("idoc");
//return codMsgExport.toString();
GlobalContainer globalContainer;
java.util.Map map;
globalContainer = container.getGlobalContainer();
map = globalContainer.getParameters();
// This is a STANDARD global parameter set <- cannot get the value itself, as well
String headerField = (String) map.get(StreamTransformationConstants.INTERFACE_NAMESPACE);
return headerField;
public String setIdoc(String codMsgExport,Container container){
container.setParameter("idoc", codMsgExport.toString());
String retValue = (String) container.getGlobalContainer().getParameter("idoc");
return retValue.toString();
=> anyway, get method returns only blank values (testing by "display queue" with some custom values...)
It seems as if the parameter is seen, as pointing to a not existing variable - e.g. getParameter("idoczz") - XI runtime returns a NullPointerException.
Some XI server details:
Runtime Environment
Java version: 1.4.2_06
Java vendor: Sun Microsystems Inc.
Version
Service pack: 14
Release: 30_REL
Thanks all!
Gianluca Tacchella

Answer 1

Hi Sudharshan and Bhavesh,
I forgot to put a value under the tab PARAMETERS (this is the reason for the blank value, thanks:)).
Anyway, modifying (run-time by the set function) the standard runtime constant => leads to a get function with a single value returned (out) for "display queue", despite of test valorization: the initial value set under tab PARAMETERS.
Instead of using the runtime (standard) constant, using my (custom) global variable => leads to NullPointerException ("display queue" for get function) EVEN IF I initialize the variable (e.g. initIdoc() function called once at top-level target message).
under JAVA_SECTIONS_TOOLTIP button:
Global Variables
String idoc;
Initialization Section
idoc = "";
Clean-Up Section
idoc = "";
public String initIdoc(Container container){
GlobalContainer globalContainer;
globalContainer = container.getGlobalContainer();
// this is the only way NOT to get a NullPointerException
if ( globalContainer.getParameter("idoc") == null )
globalContainer.setParameter("idoc", "a");
return globalContainer.getParameter("idoc").toString();
initIdoc:
out (*)
[a]
(*) despite of initialization under JAVA_SECTIONS_TOOLTIP button
public void getIdoc(ResultList result,Container container){
//String codMsgExport = (String) container.getGlobalContainer().getParameter("idoc");
//return codMsgExport.toString();
GlobalContainer globalContainer;
java.util.Map map;
globalContainer = container.getGlobalContainer();
map = globalContainer.getParameters();
//String headerField = (String) map.get(StreamTransformationConstants.INTERFACE_NAMESPACE);
// this returns null (out stream)
//String headerField = (String) map.get("idoc");
//if ( globalContainer.getParameter("idoc") == null )
//globalContainer.setParameter("idoc", "");
// this returns NullPointerException
String headerField = globalContainer.getParameter("idoc").toString();
//result.addValue(headerField);
// this returns NullPointerException
//return headerField.toString();
//return globalContainer.getParameter("idoc").toString();
result.addValue(globalContainer.getParameter("idoc").toString());
=> leads to NullPointerException
public String setIdoc(String codMsgExport,Container container){
GlobalContainer globalContainer;
globalContainer = container.getGlobalContainer();
java.util.Map map;
map = globalContainer.getParameters();
//globalContainer.setParameter(StreamTransformationConstants.INTERFACE_NAMESPACE, codMsgExport.toString());
//container.setParameter("idoc", codMsgExport.toString());
//String retValue = (String) map.put(StreamTransformationConstants.INTERFACE_NAMESPACE, codMsgExport.toString());
// this returns a NullpointerException
//String retValue = (String) map.put("idoc", codMsgExport.toString());
globalContainer.setParameter("idoc", codMsgExport.toString());
//return "True";  // pointer for debug
//return retValue.toString();  // pointer for debug
return globalContainer.getParameter("idoc").toString();
setidoc:     
in0     out (*)
[1]     [1]
[2]     [2]
(*) as if this "idoc" parameter is not the globally managed (JAVA_SECTIONS_TOOLTIP button), but one which lives inside the function and not outside for the get function..
Regards,
Gianluca