SYNOPSIS
--------
Unable to select media trays for printers on Unix platforms

FULL JDK VERSION
----------------
Java 6 (tested with 6u25)
JDK7 (tested with b143)

OPERATING SYSTEM
----------------
Unix (tested with Linux)

SYNOPSIS
--------
Unable to select media trays for printers on Unix platforms

PROBLEM DESCRIPTION
-------------------
It seems to be impossible to select media trays for printers on Unix platforms. We have tested with the same printer on Windows and Linux - on Windows the media trays are available, on Linux they are not. We also tested with a native print dialog on Linux, with the same printer, and the media trays are available for selection there. So this seems to be a JDK issue.

REPRODUCTION INSTRUCTIONS
-------------------------
Compile and run the attached test

Expected Behavior:
This is the output observed on Windows

------------------------------------------------------------------------
...
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 40, Media: na-letter
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 44, Media: tabloid
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 41, Media: na-legal
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 45, Media: invoice
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 42, Media: executive
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 3, Media: iso-a3
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 4, Media: iso-a4
...

Class Name: class sun.print.Win32MediaTray, Media Value: 5, Media: Form-Source
Class Name: class sun.print.Win32MediaTray, Media Value: 35, Media: Auto Select
Class Name: class sun.print.Win32MediaTray, Media Value: 36, Media: Tray 1
Class Name: class sun.print.Win32MediaTray, Media Value: 37, Media: Tray 2
...
------------------------------------------------------------------------

Observed behaviour:
This is the output observed on Linux, for the same printer

------------------------------------------------------------------------
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 40, Media: na-letter
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 44, Media: tabloid
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 43, Media: ledger
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 41, Media: na-legal
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 42, Media: executive
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 3, Media: iso-a3
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 4, Media: iso-a4
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 5, Media: iso-a5
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 15, Media: iso-b4
Class Name: class javax.print.attribute.standard.MediaSizeName, Media Value: 16, Media: iso-b5
------------------------------------------------------------------------

Note that there are no media trays listed, unlike the Windows output.

=> we are not able to select a specific tray for printing on Linux/Unix

TESTCASE
--------
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.attribute.standard.Media;

public class PrintTest {

    public void listPrinters() {
        PrintService service = null;
        PrintService[] services = PrintServiceLookup.lookupPrintServices(null,null);

        System.out.println("List of printers");

        // Determine the Print service
        for (int i=0; i<services.length; i++) {
            String printName = "";
            String selString = "";

            printName = services[i].getName();
            System.out.println("******************************************************");
            System.out.println("Printer Name : "+printName);
            System.out.println("Printer Implementation Class : "+services[i].getClass());
            System.out.println("******************************************************");
            printerSupportedAtrributes(services[i]);
        }


    }

    public void printerSupportedAtrributes(PrintService printer) {
        // Determine the Print Tray
        if (printer != null) {
            Media med[] = (Media[])printer.getSupportedAttributeValues(Media.class, null, null);
            for (int k=0; k<med.length; k++) {
                String a = "Class Name: " + med[k].getClass() + ", Media Value: " + med[k].getValue() + ", Media: " + med[k].toString() +"";
                System.out.println(a);
            }
        }
        System.out.println("\n\n");
    }

    public static void main(String[] args) {
        PrintTest p = new PrintTest();
        p.listPrinters();
    }
}