J2SE Version (please include all output from java -version flag):
JDK 1.5.0_15

Operating System Configuration Information (be specific):
Win_xp


Hardware Configuration Information (be specific):
"Xerox DC 400/350/250 PCL 6" on windows XP,
the driver Version: 3.0.6 (<PCL 6 printer driver > http://www.fxap.com.sg/download/suppdrv4.jsp?os=Windows+XP&productId=22)


Bug Description:
We have some NPE with a single printer driver "Xerox DC 400/350/250 PCL 6" on windows XP.
After analyzing the code we think the line:

printService.getSupportedAttributeValues( Media.class,??, ??);

produce the exception.

After reviewing the source code of Win32PrintService
we think that the exception occur because the variable "mediaSizeNames" is null
and the variable " trays " is not null.

This seems to be a problem in the driver but it should not result in a NPE.
Because this occur inside of the PrinterJob we have no change for a workaround.

The execptions are:

java.lang.NullPointerException

at sun.print.Win32PrintService.getSupportedAttributeValues(Unknown Source)
at com.inet.viewer.print.f.a(Unknown Source)
com.inet.viewer.ViewerException: java.lang.NullPointerException

at com.inet.viewer.PrinterJobProgress.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Caused by: java.lang.NullPointerException
at sun.print.Win32PrintService.getSupportedAttributeValues(Unknown Source)
at sun.print.RasterPrinterJob.updatePageAttributes(Unknown Source)
at sun.print.RasterPrinterJob.setPrintable(Unknown Source)
at sun.print.RasterPrinterJob.setAttributes(Unknown Source)
at sun.awt.windows.WPrinterJob.setAttributes(Unknown Source)
at sun.print.RasterPrinterJob.print(Unknown Source)
 ... 2 more

But we have look in the source code from Java 5 and Java 6 and there is no difference.

        } else if (category == Media.class) {
            initMedia();
            int len = (mediaSizeNames == null) ? 0 : mediaSizeNames.length;
            MediaTray[] trays = getMediaTrays();
            len += (trays == null) ? 0 : trays.length;
            Media []arr = new Media[len];
            if (mediaSizeNames != null) {
                System.arraycopy(mediaSizeNames, 0, arr,
                                 0, mediaSizeNames.length);
            }
            if (trays != null) {
                System.arraycopy(trays, 0, arr,
                                 mediaSizeNames.length, trays.length); <-- NullPointerException if mediaSizeNames is null
            }
            return arr;