Re: UDF to read a file name and use some of its contents to map fields in target.

try

{

String filename    = "";

DynamicConfiguration conf = (DynamicConfiguration) container.getTransformationParameters().get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);

DynamicConfigurationKey key = DynamicConfigurationKey.create( "http:/"+"/sap.com/xi/XI/System/File","FileName");

filename = conf.get(key);

return filename;

}

catch(Exception e)

{

     String exception = e.toString();

      return exception;

}

But you won't be able to test the dynamic file name here unless you do E2E