Dynamic file Name Generation-problem

Question

Hi Friends..
in My Idoc to File..
i want to generate Dynamic File Name ..
i put the logic in Message mapping -java intialization section
Container container = null;
SimpleDateFormat simpledatFormat = new SimpleDateFormat("yyyyMMdd");
Date date = new Date();
String datewithYear = simpledatFormat.format(date);
SimpleDateFormat simpledatFormat1 = new SimpleDateFormat("HHmmss");
Date date1 = new Date();
String datewithMs = simpledatFormat1.format(date1);
DynamicConfiguration conf = ((DynamicConfiguration) container.getTransformationParameters().get(StreamTransformationConstants.DYNAMIC_CONFIGURATION));
DynamicConfigurationKey key = DynamicConfigurationKey.create("http:/"+"/"+"sap.com"+"/"+"xi"+"/"+"XI"+"/"+"System"+"/"+"File" , "FileName");
String oldFileName=conf.get(key);
String valueNew;
if( oldFileName == null){
valueNew = "HRXML"+datewithYear+datewithMs+".xml";
else{
valueNew =oldFileName+datewithYear+datewithMs+".xml";
//set the new filename
conf.put(key, valueNew);
and i did in reciever File adaper adaper specific settings..
i am getting error sxmb_moni..
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
- <!--  Request Message Mapping
  -->
- <SAP:Error xmlns:SAP="http://sap.com/xi/XI/Message/30" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/" SOAP:mustUnderstand="1">
  <SAP:Category>Application</SAP:Category>
  <SAP:Code area="MAPPING">EXCEPTION_DURING_EXECUTE</SAP:Code>
  <SAP:P1>com/sap/xi/tf/_ZHRMD5_to_HRMasterData_MM_</SAP:P1>
  <SAP:P2>com.sap.aii.utilxi.misc.api.BaseRuntimeException</SAP:P2>
  <SAP:P3>java.lang.NullPointerException</SAP:P3>
  <SAP:P4 />
  <SAP:AdditionalText />
  <SAP:ApplicationFaultMessage namespace="" />
  <SAP:Stack>com.sap.aii.utilxi.misc.api.BaseRuntimeException thrown during application mapping com/sap/xi/tf/_ZHRMD5_to_HRMasterData_MM_: java.lang.NullPointerException</SAP:Stack>
  <SAP:Retry>M</SAP:Retry>
  </SAP:Error>
if we remove the dynamic File configuration  logic in message mapping ..i am getting the result..
please guide me..

Answer 1

Container container = null;
DynamicConfiguration conf = ((DynamicConfiguration) container.getTransformationParameters().get(StreamTransformationConstants.DYNAMIC_CONFIGURATION));
bound to get a NPE as your variable container is not getting intialized to a valid object ref here...