Dynamic Configuration set FileName

public String setDynConfFilename(String filename, String dummy, Container container) throws StreamTransformationException{
	/**
	 * Imposta il filename nel dynamic configuration parameter FileName della chiave http://sap.com/xi/XI/System/File.
	*/
	
	if ( filename.trim().length() == 0) return "";
	
	DynamicConfiguration conf1 = (DynamicConfiguration) container.getTransformationParameters()
						.get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);
	DynamicConfigurationKey key1 = DynamicConfigurationKey.create( "http://sap.com/xi/XI/System/File","FileName");
	
	conf1.put(key1,filename);
	
	return filename;
}