ZFOLD/TRIFOLD Attribute In PCL Print Job

Question

I am looking for a way to set the "@PJL COMMENT EFIPJL SET ZFOLD" parameter in a print job generated by Java's Print API, in order to tri-fold the paper in a Minolta printer.
I am using the PrintRequestAttributeSet to set Sides.DUPLEX and have checked all the Finishings options available. When printing to disc, the following PJL commands are automatically inserted at the top of the PCL file:
%-12345X@PJL SET PAGEPROTECT=AUTO
@PJL COMMENT EFIPJL SET MEDIATYPE=MEDTYPEPAPER
@PJL SET COPIES=1
@PJL COMMENT EFIPJL SET SORTERMODE=GENERICON
@PJL SET DUPLEX=ON
@PJL COMMENT EFIPJL SET STAPLE=GENERICOFF
@PJL COMMENT EFIPJL SET PUNCH=GENERICOFF
@PJL COMMENT EFIPJL SET ZFOLD=GENERICOFF
@PJL SET RESOLUTION=600
@PJL ENTER LANGUAGE=PCLIf I edit the PCL file and change ZFOLD to TRIFOLD, then send the PCL file to the printer using the lp command (under Linux), it prints duplex and tri-folds. Does anyone know how to set the ZFOLD parameter programmatically in Java?
Thanks in advance.

Answer 1

Unfortunately not. I had already tried it but it doesn't work.
I am not sure about whether the following function is called in this case, but it seems as if the job name is hard coded (function is taken from Java-sources):
JNIEXPORT jboolean JNICALL
Java_sun_print_Win32PrintJob_startPrintRawData(JNIEnv *env,
                           jobject peer,
                           jstring printer)
  HANDLE      hPrinter;
  DOC_INFO_1  DocInfo;
  LPTSTR printerName = (LPTSTR)JNU_GetStringPlatformChars(env, printer, NULL);
  // Start by opening the printer
  if (!::OpenPrinter(printerName, &hPrinter, NULL)) {
    JNU_ReleaseStringPlatformChars(env, printer, printerName);
    return false;
  JNU_ReleaseStringPlatformChars(env, printer, printerName);
  // Fill in the structure with info about this "document."
  DocInfo.pDocName = TEXT("My Document");
  DocInfo.pOutputFile = NULL;
  DocInfo.pDatatype = TEXT("RAW");
  // Inform the spooler the document is beginning.
  if( (::StartDocPrinter(hPrinter, 1, (LPBYTE)&DocInfo)) == 0 ) {
    ::ClosePrinter( hPrinter );
    return false;
  // Start a page.
  if( ! ::StartPagePrinter( hPrinter ) ) {
    ::EndDocPrinter( hPrinter );
    ::ClosePrinter( hPrinter );
    return false;
  // store handle
  jfieldID fieldId = getIdOfLongField(env, peer, HPRINTER_STR);
  env->SetLongField(peer, fieldId, reinterpret_cast<jlong>(hPrinter));
  return true;
}