Parameterized Java mapping

Hi Team,

My code is not picking the parameter from the interface determination.

Looks like there is something wrong with my code. Please help

Here is part of my code:

public class JAVA_AddTimeStamp2 implements StreamTransformation{

String inParam = "";
AbstractTrace trace;

private Map objMapParameter = null;

public void transform(TransformationInput arg0, TransformationOutput arg1)
      throws StreamTransformationException {

inParam = arg0.getInputParameters().getString("ACCOUNT_NAME");
trace.addWarning("inParam value:" +inParam);

}

public void execute(InputStream isInput, OutputStream osOutput)
   throws StreamTransformationException {
 
  String strTrgtFileName   = null;
  Date dteCurrDate    = null;
  SimpleDateFormat sdfDateFormat = null;
  DynamicConfiguration objDynConf = null;
  final String SFTP_PATH   = "http://sap.com/xi/XI/System";
  final String SFTP_PROPERTY      = "FileName";
  final String FILEEXTN   = ".pgp";
   
  // access dynamic configuration
  objDynConf = (DynamicConfiguration)
   objMapParameter.get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);
 
     dteCurrDate = new Date();    
     sdfDateFormat = new SimpleDateFormat("MMddyyyy.hhmmssSSSSSS");
    
  strTrgtFileName = inParam + ".PS00020." + sdfDateFormat.format(dteCurrDate) + FILEEXTN;
 
  //set the dynamic configuration key for File Adapter for FileName
  final DynamicConfigurationKey KEY_FILENAME =
   DynamicConfigurationKey.create(SFTP_PATH, SFTP_PROPERTY);

  // set output file name
  objDynConf.put(KEY_FILENAME, strTrgtFileName);
 
  // calling the method copyPayload
  this.copyPayLoad(isInput, osOutput);
 
  //closing the input and output streams
  try{
   isInput.close();
   osOutput.close();  
  }
  catch(IOException objIOException){
   throw new StreamTransformationException(objIOException.getMessage());
  }
}