/*
 * Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.print;

import java.awt.GraphicsEnvironment;
import java.awt.Toolkit;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Locale;
import java.util.Map;

import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.PrintService;
import javax.print.ServiceUIFactory;
import javax.print.attribute.Attribute;
import javax.print.attribute.AttributeSet;
import javax.print.attribute.AttributeSetUtilities;
import javax.print.attribute.EnumSyntax;
import javax.print.attribute.HashAttributeSet;
import javax.print.attribute.HashPrintServiceAttributeSet;
import javax.print.attribute.PrintRequestAttribute;
import javax.print.attribute.PrintServiceAttribute;
import javax.print.attribute.PrintServiceAttributeSet;
import javax.print.attribute.Size2DSyntax;
import javax.print.attribute.standard.Chromaticity;
import javax.print.attribute.standard.ColorSupported;
import javax.print.attribute.standard.Copies;
import javax.print.attribute.standard.CopiesSupported;
import javax.print.attribute.standard.Destination;
import javax.print.attribute.standard.DialogOwner;
import javax.print.attribute.standard.DialogTypeSelection;
import javax.print.attribute.standard.Fidelity;
import javax.print.attribute.standard.Finishings;
import javax.print.attribute.standard.JobName;
import javax.print.attribute.standard.JobSheets;
import javax.print.attribute.standard.Media;
import javax.print.attribute.standard.MediaPrintableArea;
import javax.print.attribute.standard.MediaSize;
import javax.print.attribute.standard.MediaSizeName;
import javax.print.attribute.standard.MediaTray;
import javax.print.attribute.standard.NumberUp;
import javax.print.attribute.standard.OrientationRequested;
import javax.print.attribute.standard.PDLOverrideSupported;
import javax.print.attribute.standard.PageRanges;
import javax.print.attribute.standard.PagesPerMinute;
import javax.print.attribute.standard.PagesPerMinuteColor;
import javax.print.attribute.standard.PrinterInfo;
import javax.print.attribute.standard.PrinterIsAcceptingJobs;
import javax.print.attribute.standard.PrinterLocation;
import javax.print.attribute.standard.PrinterMakeAndModel;
import javax.print.attribute.standard.PrinterMessageFromOperator;
import javax.print.attribute.standard.PrinterMoreInfo;
import javax.print.attribute.standard.PrinterMoreInfoManufacturer;
import javax.print.attribute.standard.PrinterName;
import javax.print.attribute.standard.PrinterResolution;
import javax.print.attribute.standard.PrinterState;
import javax.print.attribute.standard.PrinterStateReasons;
import javax.print.attribute.standard.PrinterURI;
import javax.print.attribute.standard.QueuedJobCount;
import javax.print.attribute.standard.RequestingUserName;
import javax.print.attribute.standard.SheetCollate;
import javax.print.attribute.standard.Sides;
import javax.print.event.PrintServiceAttributeListener;

import static java.nio.charset.StandardCharsets.ISO_8859_1;
import static java.nio.charset.StandardCharsets.UTF_8;

public class IPPPrintService implements PrintService, SunPrinterJobService {

    public static final boolean debugPrint;
    private static final String debugPrefix = "IPPPrintService>> ";
    protected static void debug_println(String str) {
        if (debugPrint) {
            System.out.println(str);
        }
    }

    private static final String FORCE_PIPE_PROP = "sun.print.ippdebug";

    static {
        @SuppressWarnings("removal")
        String debugStr = java.security.AccessController.doPrivileged(
                  new sun.security.action.GetPropertyAction(FORCE_PIPE_PROP));

        debugPrint = "true".equalsIgnoreCase(debugStr);
    }

    private String printer;
    private URI    myURI;
    private URL    myURL;
    private transient ServiceNotifier notifier = null;

    private static int MAXCOPIES = 1000;
    private static short MAX_ATTRIBUTE_LENGTH = 255;

    private CUPSPrinter cps;
    private HttpURLConnection urlConnection = null;
    private DocFlavor[] supportedDocFlavors;
    private Class<?>[] supportedCats;
    private MediaTray[] mediaTrays;
    private MediaSizeName[] mediaSizeNames;
    private CustomMediaSizeName[] customMediaSizeNames;
    private int defaultMediaIndex;
    private int[] rawResolutions = null;
    private PrinterResolution[] printerResolutions = null;
    private boolean isCupsPrinter;
    private boolean init;
    private Boolean isPS;
    private HashMap<String, AttributeClass> getAttMap;
    private boolean pngImagesAdded = false;
    private boolean gifImagesAdded = false;
    private boolean jpgImagesAdded = false;


    /**
     * IPP Status Codes
     */
    private static final byte STATUSCODE_SUCCESS = 0x00;

    /**
     * IPP Group Tags.  Each tag is used once before the first attribute
     * of that group.
     */
    // operation attributes group
    private static final byte GRPTAG_OP_ATTRIBUTES = 0x01;
    // job attributes group
    private static final byte GRPTAG_JOB_ATTRIBUTES = 0x02;
    // printer attributes group
    private static final byte GRPTAG_PRINTER_ATTRIBUTES = 0x04;
    // used as the last tag in an IPP message.
    private static final byte GRPTAG_END_ATTRIBUTES = 0x03;

    /**
     * IPP Operation codes
     */
    // gets the attributes for a printer
    public static final String OP_GET_ATTRIBUTES = "000B";
    // gets the default printer
    public static final String OP_CUPS_GET_DEFAULT = "4001";
    // gets the list of printers
    public static final String OP_CUPS_GET_PRINTERS = "4002";


    /**
     * List of all PrintRequestAttributes.  This is used
     * for looping through all the IPP attribute name.
     */
    private static Object[] printReqAttribDefault = {
        Chromaticity.COLOR,
        new Copies(1),
        Fidelity.FIDELITY_FALSE,
        Finishings.NONE,
        //new JobHoldUntil(new Date()),
        //new JobImpressions(0),
        //JobImpressions,
        //JobKOctets,
        //JobMediaSheets,
        new JobName("", Locale.getDefault()),
        //JobPriority,
        JobSheets.NONE,
        (Media)MediaSizeName.NA_LETTER,
        //MediaPrintableArea.class, // not an IPP attribute
        //MultipleDocumentHandling.SINGLE_DOCUMENT,
        new NumberUp(1),
        OrientationRequested.PORTRAIT,
        new PageRanges(1),
        //PresentationDirection,
                 // CUPS does not supply printer-resolution attribute
        //new PrinterResolution(300, 300, PrinterResolution.DPI),
        //PrintQuality.NORMAL,
        new RequestingUserName("", Locale.getDefault()),
        //SheetCollate.UNCOLLATED, //CUPS has no sheet collate?
        Sides.ONE_SIDED,
    };


    /**
     * List of all PrintServiceAttributes.  This is used
     * for looping through all the IPP attribute name.
     */
    private static Object[][] serviceAttributes = {
        {ColorSupported.class, "color-supported"},
        {PagesPerMinute.class,  "pages-per-minute"},
        {PagesPerMinuteColor.class, "pages-per-minute-color"},
        {PDLOverrideSupported.class, "pdl-override-supported"},
        {PrinterInfo.class, "printer-info"},
        {PrinterIsAcceptingJobs.class, "printer-is-accepting-jobs"},
        {PrinterLocation.class, "printer-location"},
        {PrinterMakeAndModel.class, "printer-make-and-model"},
        {PrinterMessageFromOperator.class, "printer-message-from-operator"},
        {PrinterMoreInfo.class, "printer-more-info"},
        {PrinterMoreInfoManufacturer.class, "printer-more-info-manufacturer"},
        {PrinterName.class, "printer-name"},
        {PrinterState.class, "printer-state"},
        {PrinterStateReasons.class, "printer-state-reasons"},
        {PrinterURI.class, "printer-uri"},
        {QueuedJobCount.class, "queued-job-count"}
    };


    /**
     * List of DocFlavors, grouped based on matching mime-type.
     * NOTE: For any change in the predefined DocFlavors, it must be reflected
     * here also.
     */
    // PDF DocFlavors
    private static DocFlavor[] appPDF = {
        DocFlavor.BYTE_ARRAY.PDF,
        DocFlavor.INPUT_STREAM.PDF,
        DocFlavor.URL.PDF
    };

    // Postscript DocFlavors
    private static DocFlavor[] appPostScript = {
        DocFlavor.BYTE_ARRAY.POSTSCRIPT,
        DocFlavor.INPUT_STREAM.POSTSCRIPT,
        DocFlavor.URL.POSTSCRIPT
    };

    // Autosense DocFlavors
    private static DocFlavor[] appOctetStream = {
        DocFlavor.BYTE_ARRAY.AUTOSENSE,
        DocFlavor.INPUT_STREAM.AUTOSENSE,
        DocFlavor.URL.AUTOSENSE
    };

    // Text DocFlavors
    private static DocFlavor[] textPlain = {
        DocFlavor.BYTE_ARRAY.TEXT_PLAIN_UTF_8,
        DocFlavor.BYTE_ARRAY.TEXT_PLAIN_UTF_16,
        DocFlavor.BYTE_ARRAY.TEXT_PLAIN_UTF_16BE,
        DocFlavor.BYTE_ARRAY.TEXT_PLAIN_UTF_16LE,
        DocFlavor.BYTE_ARRAY.TEXT_PLAIN_US_ASCII,
        DocFlavor.INPUT_STREAM.TEXT_PLAIN_UTF_8,
        DocFlavor.INPUT_STREAM.TEXT_PLAIN_UTF_16,
        DocFlavor.INPUT_STREAM.TEXT_PLAIN_UTF_16BE,
        DocFlavor.INPUT_STREAM.TEXT_PLAIN_UTF_16LE,
        DocFlavor.INPUT_STREAM.TEXT_PLAIN_US_ASCII,
        DocFlavor.URL.TEXT_PLAIN_UTF_8,
        DocFlavor.URL.TEXT_PLAIN_UTF_16,
        DocFlavor.URL.TEXT_PLAIN_UTF_16BE,
        DocFlavor.URL.TEXT_PLAIN_UTF_16LE,
        DocFlavor.URL.TEXT_PLAIN_US_ASCII,
        DocFlavor.CHAR_ARRAY.TEXT_PLAIN,
        DocFlavor.STRING.TEXT_PLAIN,
        DocFlavor.READER.TEXT_PLAIN
    };

    private static DocFlavor[] textPlainHost = {
        DocFlavor.BYTE_ARRAY.TEXT_PLAIN_HOST,
        DocFlavor.INPUT_STREAM.TEXT_PLAIN_HOST,
        DocFlavor.URL.TEXT_PLAIN_HOST
    };

    // JPG DocFlavors
    private static DocFlavor[] imageJPG = {
        DocFlavor.BYTE_ARRAY.JPEG,
        DocFlavor.INPUT_STREAM.JPEG,
        DocFlavor.URL.JPEG
    };

    // GIF DocFlavors
    private static DocFlavor[] imageGIF = {
        DocFlavor.BYTE_ARRAY.GIF,
        DocFlavor.INPUT_STREAM.GIF,
        DocFlavor.URL.GIF
    };

    // PNG DocFlavors
    private static DocFlavor[] imagePNG = {
        DocFlavor.BYTE_ARRAY.PNG,
        DocFlavor.INPUT_STREAM.PNG,
        DocFlavor.URL.PNG
    };

    // HTML DocFlavors
    private  static DocFlavor[] textHtml = {
        DocFlavor.BYTE_ARRAY.TEXT_HTML_UTF_8,
        DocFlavor.BYTE_ARRAY.TEXT_HTML_UTF_16,
        DocFlavor.BYTE_ARRAY.TEXT_HTML_UTF_16BE,
        DocFlavor.BYTE_ARRAY.TEXT_HTML_UTF_16LE,
        DocFlavor.BYTE_ARRAY.TEXT_HTML_US_ASCII,
        DocFlavor.INPUT_STREAM.TEXT_HTML_UTF_8,
        DocFlavor.INPUT_STREAM.TEXT_HTML_UTF_16,
        DocFlavor.INPUT_STREAM.TEXT_HTML_UTF_16BE,
        DocFlavor.INPUT_STREAM.TEXT_HTML_UTF_16LE,
        DocFlavor.INPUT_STREAM.TEXT_HTML_US_ASCII,
        DocFlavor.URL.TEXT_HTML_UTF_8,
        DocFlavor.URL.TEXT_HTML_UTF_16,
        DocFlavor.URL.TEXT_HTML_UTF_16BE,
        DocFlavor.URL.TEXT_HTML_UTF_16LE,
        DocFlavor.URL.TEXT_HTML_US_ASCII,
        // These are not handled in UnixPrintJob so commenting these
        // for now.
        /*
        DocFlavor.CHAR_ARRAY.TEXT_HTML,
        DocFlavor.STRING.TEXT_HTML,
        DocFlavor.READER.TEXT_HTML,
        */
    };

    private  static DocFlavor[] textHtmlHost = {
        DocFlavor.BYTE_ARRAY.TEXT_HTML_HOST,
        DocFlavor.INPUT_STREAM.TEXT_HTML_HOST,
        DocFlavor.URL.TEXT_HTML_HOST,
    };


    // PCL DocFlavors
    private static DocFlavor[] appPCL = {
        DocFlavor.BYTE_ARRAY.PCL,
        DocFlavor.INPUT_STREAM.PCL,
        DocFlavor.URL.PCL
    };

    // List of all DocFlavors, used in looping
    // through all supported mime-types
    private static Object[] allDocFlavors = {
        appPDF, appPostScript, appOctetStream,
        textPlain, imageJPG, imageGIF, imagePNG,
        textHtml, appPCL,
    };


    IPPPrintService(String name, URL url) {
        if ((name == null) || (url == null)){
            throw new IllegalArgumentException("null uri or printer name");
        }
        printer = java.net.URLDecoder.decode(name, UTF_8);
        supportedDocFlavors = null;
        supportedCats = null;
        mediaSizeNames = null;
        customMediaSizeNames = null;
        mediaTrays = null;
        myURL = url;
        cps = null;
        isCupsPrinter = false;
        init = false;
        defaultMediaIndex = -1;

        String host = myURL.getHost();
        if (host!=null && host.equals(CUPSPrinter.getServer())) {
            isCupsPrinter = true;
            try {
                myURI =  new URI("ipp://"+host+
                                 "/printers/"+printer);
                debug_println(debugPrefix+"IPPPrintService myURI : "+myURI);
            } catch (java.net.URISyntaxException e) {
                throw new IllegalArgumentException("invalid url");
            }
        }
    }


    IPPPrintService(String name, String uriStr, boolean isCups) {
        if ((name == null) || (uriStr == null)){
            throw new IllegalArgumentException("null uri or printer name");
        }
        printer = java.net.URLDecoder.decode(name, UTF_8);
        supportedDocFlavors = null;
        supportedCats = null;
        mediaSizeNames = null;
        customMediaSizeNames = null;
        mediaTrays = null;
        cps = null;
        init = false;
        defaultMediaIndex = -1;
        try {
            myURL =
                newURL(uriStr.replaceFirst("ipp", "http"));
        } catch (Exception e) {
            IPPPrintService.debug_println(debugPrefix+
                                          " IPPPrintService, myURL="+
                                          myURL+" Exception= "+
                                          e);
            throw new IllegalArgumentException("invalid url");
        }

        isCupsPrinter = isCups;
        try {
            myURI =  new URI(uriStr);
            debug_println(debugPrefix+"IPPPrintService myURI : "+myURI);
        } catch (java.net.URISyntaxException e) {
            throw new IllegalArgumentException("invalid uri");
        }
    }


    /*
     * Initialize mediaSizeNames, mediaTrays and other attributes.
     * Media size/trays are initialized to non-null values, may be 0-length
     * array.
     * NOTE: Must be called from a synchronized block only.
     */
    private void initAttributes() {
        if (!init) {
            // init customMediaSizeNames
            customMediaSizeNames = new CustomMediaSizeName[0];

            if ((urlConnection = getIPPConnection(myURL)) == null) {
                mediaSizeNames = new MediaSizeName[0];
                mediaTrays = new MediaTray[0];
                debug_println(debugPrefix+"initAttributes, NULL urlConnection ");
                init = true;
                return;
            }

            // get all supported attributes through IPP
            opGetAttributes();

            if (isCupsPrinter) {
                // note, it is possible to query media in CUPS using IPP
                // right now we always get it from PPD.
                // maybe use "&& (usePPD)" later?
                // Another reason why we use PPD is because
                // IPP currently does not support it but PPD does.

                try {
                    if (cps == null) {
                        cps = new CUPSPrinter(printer);
                        mediaSizeNames = cps.getMediaSizeNames();
                        mediaTrays = cps.getMediaTrays();
                        customMediaSizeNames = cps.getCustomMediaSizeNames();
                        defaultMediaIndex = cps.getDefaultMediaIndex();
                        rawResolutions = cps.getRawResolutions();
                    }
                    urlConnection.disconnect();
                    init = true;
                    return;
                } catch (Exception e) {
                    IPPPrintService.debug_println(debugPrefix+
                                       "initAttributes, error creating CUPSPrinter e="+e);
                }
            }

            // use IPP to get all media,
            Media[] allMedia = getSupportedMedia();
            ArrayList<Media> sizeList = new ArrayList<>();
            ArrayList<Media> trayList = new ArrayList<>();
            for (int i=0; i<allMedia.length; i++) {
                if (allMedia[i] instanceof MediaSizeName) {
                    sizeList.add(allMedia[i]);
                } else if (allMedia[i] instanceof MediaTray) {
                    trayList.add(allMedia[i]);
                }
            }

            if (sizeList != null) {
                mediaSizeNames = new MediaSizeName[sizeList.size()];
                mediaSizeNames = sizeList.toArray(mediaSizeNames);
            }
            if (trayList != null) {
                mediaTrays = new MediaTray[trayList.size()];
                mediaTrays = trayList.toArray(mediaTrays);
            }
            urlConnection.disconnect();

            init = true;
        }
    }


    public DocPrintJob createPrintJob() {
        @SuppressWarnings("removal")
        SecurityManager security = System.getSecurityManager();
        if (security != null) {
            security.checkPrintJobAccess();
        }
        // REMIND: create IPPPrintJob
        return new UnixPrintJob(this);
    }


    public synchronized Object
        getSupportedAttributeValues(Class<? extends Attribute> category,
                                    DocFlavor flavor,
                                    AttributeSet attributes)
    {
        if (category == null) {
            throw new NullPointerException("null category");
        }
        if (!Attribute.class.isAssignableFrom(category)) {
            throw new IllegalArgumentException(category +
                                 " does not implement Attribute");
        }
        if (flavor != null) {
            if (!isDocFlavorSupported(flavor)) {
                throw new IllegalArgumentException(flavor +
                                               " is an unsupported flavor");
            } else if (isAutoSense(flavor)) {
                return null;
            }

        }

        if (!isAttributeCategorySupported(category)) {
            return null;
        }

        /* Test if the flavor is compatible with the attributes */
        if (!isDestinationSupported(flavor, attributes)) {
            return null;
        }

        initAttributes();

        /* Test if the flavor is compatible with the category */
        if ((category == Copies.class) ||
            (category == CopiesSupported.class)) {
            if (flavor == null ||
                !(flavor.equals(DocFlavor.INPUT_STREAM.POSTSCRIPT) ||
                  flavor.equals(DocFlavor.URL.POSTSCRIPT) ||
                  flavor.equals(DocFlavor.BYTE_ARRAY.POSTSCRIPT))) {
                CopiesSupported cs = new CopiesSupported(1, MAXCOPIES);
                AttributeClass attribClass = (getAttMap != null) ?
                    getAttMap.get(cs.getName()) : null;
                if (attribClass != null) {
                    int[] range = attribClass.getIntRangeValue();
                    cs = new CopiesSupported(range[0], range[1]);
                }
                return cs;
            } else {
                return null;
            }
        } else  if (category == Chromaticity.class) {
            if (flavor == null ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PAGEABLE) ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PRINTABLE) ||
                !isIPPSupportedImages(flavor.getMimeType())) {
                Chromaticity[]arr = new Chromaticity[1];
                arr[0] = Chromaticity.COLOR;
                return (arr);
            } else {
                return null;
            }
        } else if (category == Destination.class) {
            if (flavor == null ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PAGEABLE) ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PRINTABLE)) {
                try {
                    return new Destination((new File("out.ps")).toURI());
                } catch (SecurityException se) {
                    try {
                        return new Destination(new URI("file:out.ps"));
                    } catch (URISyntaxException e) {
                        return null;
                    }
                }
            }
            return null;
        } else if (category == Fidelity.class) {
            Fidelity []arr = new Fidelity[2];
            arr[0] = Fidelity.FIDELITY_FALSE;
            arr[1] = Fidelity.FIDELITY_TRUE;
            return arr;
        } else if (category == Finishings.class) {
            AttributeClass attribClass = (getAttMap != null) ?
                getAttMap.get("finishings-supported")
                : null;
            if (attribClass != null) {
                int[] finArray = attribClass.getArrayOfIntValues();
                if ((finArray != null) && (finArray.length > 0)) {
                    Finishings[] finSup = new Finishings[finArray.length];
                    for (int i=0; i<finArray.length; i++) {
                        finSup[i] = Finishings.NONE;
                        Finishings[] fAll = (Finishings[])
                            (new ExtFinishing(100)).getAll();
                        for (int j=0; j<fAll.length; j++) {
                            if (fAll[j] == null) {
                                continue;
                            }
                            if (finArray[i] == fAll[j].getValue()) {
                                finSup[i] = fAll[j];
                                break;
                            }
                        }
                    }
                    return finSup;
                }
            }
        } else if (category == JobName.class) {
            return new JobName("Java Printing", null);
        } else if (category == JobSheets.class) {
            JobSheets[] arr = new JobSheets[2];
            arr[0] = JobSheets.NONE;
            arr[1] = JobSheets.STANDARD;
            return arr;

        } else if (category == Media.class) {
            Media[] allMedia = new Media[mediaSizeNames.length+
                                        mediaTrays.length];

            for (int i=0; i<mediaSizeNames.length; i++) {
                allMedia[i] = mediaSizeNames[i];
            }

            for (int i=0; i<mediaTrays.length; i++) {
                allMedia[i+mediaSizeNames.length] = mediaTrays[i];
            }

            if (allMedia.length == 0) {
                allMedia = new Media[1];
                allMedia[0] = (Media)getDefaultAttributeValue(Media.class);
            }

            return allMedia;
        } else if (category == MediaPrintableArea.class) {
            MediaPrintableArea[] mpas = null;
            if (cps != null) {
                mpas = cps.getMediaPrintableArea();
            }

            if (mpas == null) {
                mpas = new MediaPrintableArea[1];
                mpas[0] = (MediaPrintableArea)
                    getDefaultAttributeValue(MediaPrintableArea.class);
            }

            if ((attributes == null) || (attributes.size() == 0)) {
                ArrayList<MediaPrintableArea> printableList =
                                       new ArrayList<MediaPrintableArea>();

                for (int i=0; i<mpas.length; i++) {
                    if (mpas[i] != null) {
                        printableList.add(mpas[i]);
                    }
                }
                if (printableList.size() > 0) {
                    mpas  = new MediaPrintableArea[printableList.size()];
                    printableList.toArray(mpas);
                }
                return mpas;
            }

            int match = -1;
            Media media = (Media)attributes.get(Media.class);
            if (media instanceof MediaSizeName msn) {

                // case when no supported mediasizenames are reported
                // check given media against the default
                if (mediaSizeNames.length == 0 &&
                    msn.equals(getDefaultAttributeValue(Media.class))) {
                    //default printable area is that of default mediasize
                    return mpas;
                }

                for (int i=0; i<mediaSizeNames.length; i++) {
                    if (msn.equals(mediaSizeNames[i])) {
                        match = i;
                    }
                }
            }

            if (match == -1) {
                return null;
            } else {
                MediaPrintableArea []arr = new MediaPrintableArea[1];
                arr[0] = mpas[match];
                return arr;
            }
        } else if (category == NumberUp.class) {
            AttributeClass attribClass = (getAttMap != null) ?
                getAttMap.get("number-up-supported") : null;
            if (attribClass != null) {
                int[] values = attribClass.getArrayOfIntValues();
                if (values != null) {
                    NumberUp[] nUp = new NumberUp[values.length];
                    for (int i=0; i<values.length; i++) {
                        nUp[i] = new NumberUp(values[i]);
                    }
                    return nUp;
                } else {
                    return null;
                }
            }
        } else if (category == OrientationRequested.class) {
            if ((flavor != null) &&
                (flavor.equals(DocFlavor.INPUT_STREAM.POSTSCRIPT) ||
                 flavor.equals(DocFlavor.URL.POSTSCRIPT) ||
                 flavor.equals(DocFlavor.BYTE_ARRAY.POSTSCRIPT))) {
                return null;
            }

            boolean revPort = false;
            OrientationRequested[] orientSup = null;

            AttributeClass attribClass = (getAttMap != null) ?
              getAttMap.get("orientation-requested-supported")
                : null;
            if (attribClass != null) {
                int[] orientArray = attribClass.getArrayOfIntValues();
                if ((orientArray != null) && (orientArray.length > 0)) {
                    orientSup =
                        new OrientationRequested[orientArray.length];
                    for (int i=0; i<orientArray.length; i++) {
                        switch (orientArray[i]) {
                        default:
                        case 3 :
                            orientSup[i] = OrientationRequested.PORTRAIT;
                            break;
                        case 4:
                            orientSup[i] = OrientationRequested.LANDSCAPE;
                            break;
                        case 5:
                            orientSup[i] =
                                OrientationRequested.REVERSE_LANDSCAPE;
                            break;
                        case 6:
                            orientSup[i] =
                                OrientationRequested.REVERSE_PORTRAIT;
                            revPort = true;
                            break;
                        }
                    }
                }
            }
            if (flavor == null ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PAGEABLE) ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PRINTABLE)) {

                if (revPort && flavor == null) {
                    OrientationRequested []orSup = new OrientationRequested[4];
                    orSup[0] = OrientationRequested.PORTRAIT;
                    orSup[1] = OrientationRequested.LANDSCAPE;
                    orSup[2] = OrientationRequested.REVERSE_LANDSCAPE;
                    orSup[3] = OrientationRequested.REVERSE_PORTRAIT;
                    return orSup;
                } else {
                    OrientationRequested []orSup = new OrientationRequested[3];
                    orSup[0] = OrientationRequested.PORTRAIT;
                    orSup[1] = OrientationRequested.LANDSCAPE;
                    orSup[2] = OrientationRequested.REVERSE_LANDSCAPE;
                    return orSup;
                }
            } else {
                return orientSup;
            }
        } else if (category == PageRanges.class) {
           if (flavor == null ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PAGEABLE) ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PRINTABLE)) {
                PageRanges []arr = new PageRanges[1];
                arr[0] = new PageRanges(1, Integer.MAX_VALUE);
                return arr;
            } else {
                // Returning null as this is not yet supported in UnixPrintJob.
                return null;
            }
        } else if (category == RequestingUserName.class) {
            String userName = "";
            try {
              userName = System.getProperty("user.name", "");
            } catch (SecurityException se) {
            }
            return new RequestingUserName(userName, null);
        } else if (category == Sides.class) {
            // The printer takes care of Sides so if short-edge
            // is chosen in a job, the rotation is done by the printer.
            // Orientation is rotated by emulation if pageable
            // or printable so if the document is in Landscape, this may
            // result in double rotation.
            AttributeClass attribClass = (getAttMap != null) ?
                getAttMap.get("sides-supported")
                : null;
            if (attribClass != null) {
                String[] sidesArray = attribClass.getArrayOfStringValues();
                if ((sidesArray != null) && (sidesArray.length > 0)) {
                    Sides[] sidesSup = new Sides[sidesArray.length];
                    for (int i=0; i<sidesArray.length; i++) {
                        if (sidesArray[i].endsWith("long-edge")) {
                            sidesSup[i] = Sides.TWO_SIDED_LONG_EDGE;
                        } else if (sidesArray[i].endsWith("short-edge")) {
                            sidesSup[i] = Sides.TWO_SIDED_SHORT_EDGE;
                        } else {
                            sidesSup[i] = Sides.ONE_SIDED;
                        }
                    }
                    return sidesSup;
                }
            }
        } else if (category == PrinterResolution.class) {
            PrinterResolution[] supportedRes = getPrintResolutions();
            if (supportedRes == null) {
                return null;
            }
            PrinterResolution []arr =
                new PrinterResolution[supportedRes.length];
            System.arraycopy(supportedRes, 0, arr, 0, supportedRes.length);
            return arr;
        }

        return null;
    }

    //This class is for getting all pre-defined Finishings
    @SuppressWarnings("serial") // JDK implementation class
    private static class ExtFinishing extends Finishings {
        ExtFinishing(int value) {
            super(100); // 100 to avoid any conflicts with predefined values.
        }

        EnumSyntax[] getAll() {
            EnumSyntax[] es = super.getEnumValueTable();
            return es;
        }
    }


    public AttributeSet getUnsupportedAttributes(DocFlavor flavor,
                                                 AttributeSet attributes) {
        if (flavor != null && !isDocFlavorSupported(flavor)) {
            throw new IllegalArgumentException("flavor " + flavor +
                                               "is not supported");
        }

        if (attributes == null) {
            return null;
        }

        Attribute attr;
        AttributeSet unsupp = new HashAttributeSet();
        Attribute []attrs = attributes.toArray();
        for (int i=0; i<attrs.length; i++) {
            try {
                attr = attrs[i];
                if (!isAttributeCategorySupported(attr.getCategory())) {
                    unsupp.add(attr);
                } else if (!isAttributeValueSupported(attr, flavor,
                                                      attributes)) {
                    unsupp.add(attr);
                }
            } catch (ClassCastException e) {
            }
        }
        if (unsupp.isEmpty()) {
            return null;
        } else {
            return unsupp;
        }
    }


    public synchronized DocFlavor[] getSupportedDocFlavors() {

        if (supportedDocFlavors != null) {
            int len = supportedDocFlavors.length;
                DocFlavor[] copyflavors = new DocFlavor[len];
                System.arraycopy(supportedDocFlavors, 0, copyflavors, 0, len);
                return copyflavors;
        }
        initAttributes();

        if ((getAttMap != null) &&
            getAttMap.containsKey("document-format-supported")) {

            AttributeClass attribClass =
                getAttMap.get("document-format-supported");
            if (attribClass != null) {
                String mimeType;
                boolean psSupported = false;
                String[] docFlavors = attribClass.getArrayOfStringValues();
                DocFlavor[] flavors;
                HashSet<Object> docList = new HashSet<>();
                int j;
                String hostEnc = DocFlavor.hostEncoding.
                    toLowerCase(Locale.ENGLISH);
                boolean addHostEncoding = !hostEnc.equals("utf-8") &&
                    !hostEnc.equals("utf-16") && !hostEnc.equals("utf-16be") &&
                    !hostEnc.equals("utf-16le") && !hostEnc.equals("us-ascii");

                for (int i = 0; i < docFlavors.length; i++) {
                    for (j=0; j<allDocFlavors.length; j++) {
                        flavors = (DocFlavor[])allDocFlavors[j];

                        mimeType = flavors[0].getMimeType();
                        if (mimeType.startsWith(docFlavors[i])) {

                            docList.addAll(Arrays.asList(flavors));

                            if (mimeType.equals("text/plain") &&
                                addHostEncoding) {
                                docList.add(Arrays.asList(textPlainHost));
                            } else if (mimeType.equals("text/html") &&
                                       addHostEncoding) {
                                docList.add(Arrays.asList(textHtmlHost));
                            } else if (mimeType.equals("image/png")) {
                                pngImagesAdded = true;
                            } else if (mimeType.equals("image/gif")) {
                                gifImagesAdded = true;
                            } else if (mimeType.equals("image/jpeg")) {
                                jpgImagesAdded = true;
                            } else if (mimeType.contains("postscript")) {
                                psSupported = true;
                            }
                            break;
                        }
                    }

                    // Not added? Create new DocFlavors
                    if (j == allDocFlavors.length) {
                        //  make new DocFlavors
                        docList.add(new DocFlavor.BYTE_ARRAY(docFlavors[i]));
                        docList.add(new DocFlavor.INPUT_STREAM(docFlavors[i]));
                        docList.add(new DocFlavor.URL(docFlavors[i]));
                    }
                }

                // check if we need to add image DocFlavors
                // and Pageable/Printable flavors
                if (psSupported || isCupsPrinter) {
                    /*
                     Always add Pageable and Printable for CUPS
                     since it uses Filters to convert from Postscript
                     to device printer language.
                    */
                    docList.add(DocFlavor.SERVICE_FORMATTED.PAGEABLE);
                    docList.add(DocFlavor.SERVICE_FORMATTED.PRINTABLE);

                    docList.addAll(Arrays.asList(imageJPG));
                    docList.addAll(Arrays.asList(imagePNG));
                    docList.addAll(Arrays.asList(imageGIF));
                }
                supportedDocFlavors = new DocFlavor[docList.size()];
                docList.toArray(supportedDocFlavors);
                int len = supportedDocFlavors.length;
                DocFlavor[] copyflavors = new DocFlavor[len];
                System.arraycopy(supportedDocFlavors, 0, copyflavors, 0, len);
                return copyflavors;
            }
        }
        DocFlavor[] flavor = new DocFlavor[2];
        flavor[0] = DocFlavor.SERVICE_FORMATTED.PAGEABLE;
        flavor[1] = DocFlavor.SERVICE_FORMATTED.PRINTABLE;
        supportedDocFlavors = flavor;
        return flavor;
    }


    public boolean isDocFlavorSupported(DocFlavor flavor) {
        if (supportedDocFlavors == null) {
            getSupportedDocFlavors();
        }
        if (supportedDocFlavors != null) {
            for (int f=0; f<supportedDocFlavors.length; f++) {
                if (flavor.equals(supportedDocFlavors[f])) {
                    return true;
                }
            }
        }
        return false;
    }


    /**
     * Finds matching CustomMediaSizeName of given media.
     */
    public CustomMediaSizeName findCustomMedia(MediaSizeName media) {
        if (customMediaSizeNames == null) {
            return null;
        }
        for (int i=0; i< customMediaSizeNames.length; i++) {
            CustomMediaSizeName custom = customMediaSizeNames[i];
            MediaSizeName msn = custom.getStandardMedia();
            if (media.equals(msn)) {
                return customMediaSizeNames[i];
            }
        }
        return null;
    }


    /**
     * Returns the matching standard Media using string comparison of names.
     */
    private Media getIPPMedia(String mediaName) {
        CustomMediaSizeName sampleSize =
                CustomMediaSizeName.create("sample", "", 0, 0);
        Media[] sizes = sampleSize.getSuperEnumTable();
        for (int i=0; i<sizes.length; i++) {
            if (mediaName.equals(""+sizes[i])) {
                return sizes[i];
            }
        }
        CustomMediaTray sampleTray = CustomMediaTray.create("sample", "");
        Media[] trays = sampleTray.getSuperEnumTable();
        for (int i=0; i<trays.length; i++) {
            if (mediaName.equals(""+trays[i])) {
                return trays[i];
            }
        }
        return null;
    }

    private Media[] getSupportedMedia() {
        if ((getAttMap != null) &&
            getAttMap.containsKey("media-supported")) {

            AttributeClass attribClass = getAttMap.get("media-supported");

            if (attribClass != null) {
                String[] mediaVals = attribClass.getArrayOfStringValues();
                Media msn;
                Media[] mediaNames =
                    new Media[mediaVals.length];
                for (int i=0; i<mediaVals.length; i++) {
                    msn = getIPPMedia(mediaVals[i]);
                    //REMIND: if null, create custom?
                    mediaNames[i] = msn;
                }
                return mediaNames;
            }
        }
        return new Media[0];
    }


    public synchronized Class<?>[] getSupportedAttributeCategories() {
        if (supportedCats != null) {
            Class<?> [] copyCats = new Class<?>[supportedCats.length];
            System.arraycopy(supportedCats, 0, copyCats, 0, copyCats.length);
            return copyCats;
        }

        initAttributes();

        ArrayList<Class<?>> catList = new ArrayList<>();

        for (int i=0; i < printReqAttribDefault.length; i++) {
            PrintRequestAttribute pra =
                (PrintRequestAttribute)printReqAttribDefault[i];
            if (getAttMap != null &&
                getAttMap.containsKey(pra.getName()+"-supported")) {
                catList.add(pra.getCategory());
            }
        }

        // Some IPP printers like lexc710 do not have list of supported media
        // but CUPS can get the media from PPD, so we still report as
        // supported category.
        if (isCupsPrinter) {
            if (!catList.contains(Media.class)) {
                catList.add(Media.class);
            }

            // Always add MediaPrintable for cups,
            // because we can get it from PPD.
            catList.add(MediaPrintableArea.class);

            // this is already supported in UnixPrintJob
            catList.add(Destination.class);

            // It is unfortunate that CUPS doesn't provide a way to query
            // if printer supports collation but since most printers
            // now supports collation and that most OS has a way
            // of setting it, it is a safe assumption to just always
            // include SheetCollate as supported attribute.

            catList.add(SheetCollate.class);

        }

        // With the assumption that  Chromaticity is equivalent to
        // ColorSupported.
        if (getAttMap != null && getAttMap.containsKey("color-supported")) {
            catList.add(Chromaticity.class);
        }

        // CUPS does not report printer resolution via IPP but it
        // may be gleaned from the PPD.
        PrinterResolution[] supportedRes = getPrintResolutions();
        if (supportedRes != null && (supportedRes.length > 0)) {
            catList.add(PrinterResolution.class);
        }

        if (GraphicsEnvironment.isHeadless() == false) {
            catList.add(DialogOwner.class);
            catList.add(DialogTypeSelection.class);
        }

        supportedCats = new Class<?>[catList.size()];
        catList.toArray(supportedCats);
        Class<?>[] copyCats = new Class<?>[supportedCats.length];
        System.arraycopy(supportedCats, 0, copyCats, 0, copyCats.length);
        return copyCats;
    }


    public boolean
        isAttributeCategorySupported(Class<? extends Attribute> category)
    {
        if (category == null) {
            throw new NullPointerException("null category");
        }
        if (!(Attribute.class.isAssignableFrom(category))) {
            throw new IllegalArgumentException(category +
                                             " is not an Attribute");
        }

        if (supportedCats == null) {
            getSupportedAttributeCategories();
        }

        // It is safe to assume that Orientation is always supported
        // and even if CUPS or an IPP device reports it as not,
        // our renderer can do portrait, landscape and
        // reverse landscape.
        if (category == OrientationRequested.class) {
            return true;
        }

        for (int i=0;i<supportedCats.length;i++) {
            if (category == supportedCats[i]) {
                return true;
            }
        }

        return false;
    }

    @SuppressWarnings("unchecked")
    public synchronized <T extends PrintServiceAttribute>
        T getAttribute(Class<T> category)
    {
        if (category == null) {
            throw new NullPointerException("category");
        }
        if (!(PrintServiceAttribute.class.isAssignableFrom(category))) {
            throw new IllegalArgumentException("Not a PrintServiceAttribute");
        }

        initAttributes();

        if (category == PrinterName.class) {
            return (T)(new PrinterName(printer, null));
        } else if (category == PrinterInfo.class) {
            PrinterInfo pInfo = new PrinterInfo(printer, null);
            AttributeClass ac = (getAttMap != null) ?
                getAttMap.get(pInfo.getName())
                : null;
            if (ac != null) {
                return (T)(new PrinterInfo(ac.getStringValue(), null));
            }
            return (T)pInfo;
        } else if (category == QueuedJobCount.class) {
            QueuedJobCount qjc = new QueuedJobCount(0);
            AttributeClass ac = (getAttMap != null) ?
                getAttMap.get(qjc.getName())
                : null;
            if (ac != null) {
                qjc = new QueuedJobCount(ac.getIntValue());
            }
            return (T)qjc;
        } else if (category == PrinterIsAcceptingJobs.class) {
            PrinterIsAcceptingJobs accJob =
                PrinterIsAcceptingJobs.ACCEPTING_JOBS;
            AttributeClass ac = (getAttMap != null) ?
                getAttMap.get(accJob.getName())
                : null;
            if ((ac != null) && (ac.getByteValue() == 0)) {
                accJob = PrinterIsAcceptingJobs.NOT_ACCEPTING_JOBS;
            }
            return (T)accJob;
        } else if (category == ColorSupported.class) {
            ColorSupported cs = ColorSupported.SUPPORTED;
            AttributeClass ac = (getAttMap != null) ?
                getAttMap.get(cs.getName())
                : null;
            if ((ac != null) && (ac.getByteValue() == 0)) {
                cs = ColorSupported.NOT_SUPPORTED;
            }
            return (T)cs;
        } else if (category == PDLOverrideSupported.class) {

            if (isCupsPrinter) {
                // Documented: For CUPS this will always be false
                return (T)PDLOverrideSupported.NOT_ATTEMPTED;
            } else {
                // REMIND: check attribute values
                return (T)PDLOverrideSupported.NOT_ATTEMPTED;
            }
        } else if (category == PrinterURI.class) {
            return (T)(new PrinterURI(myURI));
        } else {
            return null;
        }
    }


    public synchronized PrintServiceAttributeSet getAttributes() {
        if (!init) {
            // get all attributes for the first time.
            initAttributes();
        } else {
            // only need service attributes updated.
            // update getAttMap by sending again get-attributes IPP request
            if ((urlConnection = getIPPConnection(myURL)) != null) {
                opGetAttributes();
                urlConnection.disconnect();
            }
        }

        HashPrintServiceAttributeSet attrs =
            new HashPrintServiceAttributeSet();

        for (int i=0; i < serviceAttributes.length; i++) {
            String name = (String)serviceAttributes[i][1];
            if (getAttMap != null && getAttMap.containsKey(name)) {
                @SuppressWarnings("unchecked")
                Class<PrintServiceAttribute> c = (Class<PrintServiceAttribute>)serviceAttributes[i][0];
                PrintServiceAttribute psa = getAttribute(c);
                if (psa != null) {
                    attrs.add(psa);
                }
            }
        }
        return AttributeSetUtilities.unmodifiableView(attrs);
    }

    public boolean isIPPSupportedImages(String mimeType) {
        if (supportedDocFlavors == null) {
            getSupportedDocFlavors();
        }

        if (mimeType.equals("image/png") && pngImagesAdded) {
            return true;
        } else if (mimeType.equals("image/gif") && gifImagesAdded) {
            return true;
        } else if (mimeType.equals("image/jpeg") && jpgImagesAdded) {
            return true;
        }

        return false;
    }


    private boolean isSupportedCopies(Copies copies) {
        CopiesSupported cs = (CopiesSupported)
            getSupportedAttributeValues(Copies.class, null, null);
        int[][] members = cs.getMembers();
        int min, max;
        if ((members.length > 0) && (members[0].length > 0)) {
            min = members[0][0];
            max = members[0][1];
        } else {
            min = 1;
            max = MAXCOPIES;
        }

        int value = copies.getValue();
        return (value >= min && value <= max);
    }

    private boolean isAutoSense(DocFlavor flavor) {
        if (flavor.equals(DocFlavor.BYTE_ARRAY.AUTOSENSE) ||
            flavor.equals(DocFlavor.INPUT_STREAM.AUTOSENSE) ||
            flavor.equals(DocFlavor.URL.AUTOSENSE)) {
            return true;
        }
        else {
            return false;
        }
    }

    private synchronized boolean isSupportedMediaTray(MediaTray msn) {
        initAttributes();

        if (mediaTrays != null) {
            for (int i=0; i<mediaTrays.length; i++) {
               if (msn.equals(mediaTrays[i])) {
                    return true;
                }
            }
        }
        return false;
    }

    private synchronized boolean isSupportedMedia(MediaSizeName msn) {
        initAttributes();

        if (msn.equals((Media)getDefaultAttributeValue(Media.class))) {
            return true;
        }
        for (int i=0; i<mediaSizeNames.length; i++) {
            debug_println(debugPrefix+"isSupportedMedia, mediaSizeNames[i] "+mediaSizeNames[i]);
            if (msn.equals(mediaSizeNames[i])) {
                return true;
            }
        }
        return false;
    }

    /* Return false if flavor is not null, pageable, nor printable and
     * Destination is part of attributes.
     */
    private boolean
        isDestinationSupported(DocFlavor flavor, AttributeSet attributes) {

            if ((attributes != null) &&
                    (attributes.get(Destination.class) != null) &&
                    !(flavor == null ||
                      flavor.equals(DocFlavor.SERVICE_FORMATTED.PAGEABLE) ||
                      flavor.equals(DocFlavor.SERVICE_FORMATTED.PRINTABLE))) {
                return false;
            }
            return true;
    }


    public boolean isAttributeValueSupported(Attribute attr,
                                             DocFlavor flavor,
                                             AttributeSet attributes) {
        if (attr == null) {
            throw new NullPointerException("null attribute");
        }
        if (flavor != null) {
            if (!isDocFlavorSupported(flavor)) {
                throw new IllegalArgumentException(flavor +
                                               " is an unsupported flavor");
            } else if (isAutoSense(flavor)) {
                return false;
            }
        }
        Class<? extends Attribute> category = attr.getCategory();
        if (!isAttributeCategorySupported(category)) {
            return false;
        }

        /* Test if the flavor is compatible with the attributes */
        if (!isDestinationSupported(flavor, attributes)) {
            return false;
        }

        /* Test if the flavor is compatible with the category */
        if (attr.getCategory() == Chromaticity.class) {
            if ((flavor == null) ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PAGEABLE) ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PRINTABLE) ||
                !isIPPSupportedImages(flavor.getMimeType())) {
                return attr == Chromaticity.COLOR;
            } else {
                return false;
            }
        } else if (attr.getCategory() == Copies.class) {
            return (flavor == null ||
                   !(flavor.equals(DocFlavor.INPUT_STREAM.POSTSCRIPT) ||
                   flavor.equals(DocFlavor.URL.POSTSCRIPT) ||
                   flavor.equals(DocFlavor.BYTE_ARRAY.POSTSCRIPT))) &&
                isSupportedCopies((Copies)attr);

        } else if (attr.getCategory() == Destination.class) {
            if (flavor == null ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PAGEABLE) ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PRINTABLE)) {
                URI uri = ((Destination)attr).getURI();
                if ("file".equals(uri.getScheme()) &&
                    !uri.getSchemeSpecificPart().isEmpty()) {
                    return true;
                }
            }
            return false;
        } else if (attr.getCategory() == Media.class) {
            if (attr instanceof MediaSizeName) {
                return isSupportedMedia((MediaSizeName)attr);
            }
            if (attr instanceof MediaTray) {
                return isSupportedMediaTray((MediaTray)attr);
            }
        } else if (attr.getCategory() == PageRanges.class) {
            if (flavor != null &&
                !(flavor.equals(DocFlavor.SERVICE_FORMATTED.PAGEABLE) ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PRINTABLE))) {
                return false;
            }
        } else if (attr.getCategory() == SheetCollate.class) {
            if (flavor != null &&
                !(flavor.equals(DocFlavor.SERVICE_FORMATTED.PAGEABLE) ||
                flavor.equals(DocFlavor.SERVICE_FORMATTED.PRINTABLE))) {
                return false;
            }
        } else if (attr.getCategory() == Sides.class) {
            Sides[] sidesArray = (Sides[])getSupportedAttributeValues(
                                          Sides.class,
                                          flavor,
                                          attributes);

            if (sidesArray != null) {
                for (int i=0; i<sidesArray.length; i++) {
                    if (sidesArray[i] == (Sides)attr) {
                        return true;
                    }
                }
            }
            return false;
        } else if (attr.getCategory() == OrientationRequested.class) {
            OrientationRequested[] orientArray =
                (OrientationRequested[])getSupportedAttributeValues(
                                          OrientationRequested.class,
                                          flavor,
                                          attributes);

            if (orientArray != null) {
                for (int i=0; i<orientArray.length; i++) {
                    if (orientArray[i] == (OrientationRequested)attr) {
                        return true;
                    }
                }
            }
            return false;
        } else if (attr.getCategory() == PrinterResolution.class) {
            if (attr instanceof PrinterResolution) {
                return isSupportedResolution((PrinterResolution)attr);
            }
        } else if (attr.getCategory() == DialogOwner.class) {
            DialogOwner owner = (DialogOwner)attr;
            // ID not supported on any dialog type on Unix platforms.
            if (DialogOwnerAccessor.getID(owner) != 0) {
                return false;
            }
            // On Mac we have no control over the native dialog.
            DialogTypeSelection dst = (attributes == null) ? null :
               (DialogTypeSelection)attributes.get(DialogTypeSelection.class);
            if (PrintServiceLookupProvider.isMac() &&
                dst == DialogTypeSelection.NATIVE) {
                return false;
            }
            // The other case is always a Swing dialog on all Unix platforms.
            // So we only need to check that the toolkit supports
            // always on top.
            if (owner.getOwner() != null) {
                return true;
            } else {
                return Toolkit.getDefaultToolkit().isAlwaysOnTopSupported();
            }
        } else if (attr.getCategory() == DialogTypeSelection.class) {
            if (PrintServiceLookupProvider.isMac()) {
                return true;
            } else {
               DialogTypeSelection dst = (DialogTypeSelection)attr;
               return attr == DialogTypeSelection.COMMON;
            }
        }
        return true;
    }


    public synchronized Object
        getDefaultAttributeValue(Class<? extends Attribute> category)
    {
        if (category == null) {
            throw new NullPointerException("null category");
        }
        if (!Attribute.class.isAssignableFrom(category)) {
            throw new IllegalArgumentException(category +
                                             " is not an Attribute");
        }
        if (!isAttributeCategorySupported(category)) {
            return null;
        }

        initAttributes();

        String catName = null;
        for (int i=0; i < printReqAttribDefault.length; i++) {
            PrintRequestAttribute pra =
                (PrintRequestAttribute)printReqAttribDefault[i];
            if (pra.getCategory() == category) {
                catName = pra.getName();
                break;
            }
        }
        String attribName = catName+"-default";
        AttributeClass attribClass = (getAttMap != null) ?
                getAttMap.get(attribName) : null;

        if (category == Copies.class) {
            if (attribClass != null) {
                return new Copies(attribClass.getIntValue());
            } else {
                return new Copies(1);
            }
        } else if (category == Chromaticity.class) {
            return Chromaticity.COLOR;
        } else if (category == Destination.class) {
            try {
                return new Destination((new File("out.ps")).toURI());
            } catch (SecurityException se) {
                try {
                    return new Destination(new URI("file:out.ps"));
                } catch (URISyntaxException e) {
                    return null;
                }
            }
        } else if (category == Fidelity.class) {
            return Fidelity.FIDELITY_FALSE;
        } else if (category == Finishings.class) {
            return Finishings.NONE;
        } else if (category == JobName.class) {
            return new JobName("Java Printing", null);
        } else if (category == JobSheets.class) {
            if (attribClass != null &&
                attribClass.getStringValue().equals("none")) {
                return JobSheets.NONE;
            } else {
                return JobSheets.STANDARD;
            }
        } else if (category == Media.class) {
            if (defaultMediaIndex == -1) {
                defaultMediaIndex = 0;
            }
            if (mediaSizeNames.length == 0) {
                String defaultCountry = Locale.getDefault().getCountry();
                if (defaultCountry != null &&
                    (defaultCountry.isEmpty() ||
                     defaultCountry.equals(Locale.US.getCountry()) ||
                     defaultCountry.equals(Locale.CANADA.getCountry()))) {
                    return MediaSizeName.NA_LETTER;
                } else {
                    return MediaSizeName.ISO_A4;
                }
            }

            if (attribClass != null) {
                String name = attribClass.getStringValue();
                if (isCupsPrinter) {
                    return mediaSizeNames[defaultMediaIndex];
                } else {
                    for (int i=0; i< mediaSizeNames.length; i++) {
                        if (mediaSizeNames[i].toString().contains(name)) {
                            defaultMediaIndex = i;
                            return mediaSizeNames[defaultMediaIndex];
                        }
                    }
                }
            }
            return mediaSizeNames[defaultMediaIndex];

        } else if (category == MediaPrintableArea.class) {
            MediaPrintableArea[] mpas;
             if ((cps != null)  &&
                 ((mpas = cps.getMediaPrintableArea()) != null)) {
                 if (defaultMediaIndex == -1) {
                     // initializes value of defaultMediaIndex
                     getDefaultAttributeValue(Media.class);
                 }
                 return mpas[defaultMediaIndex];
             } else {
                 String defaultCountry = Locale.getDefault().getCountry();
                 float iw, ih;
                 if (defaultCountry != null &&
                     (defaultCountry.isEmpty() ||
                      defaultCountry.equals(Locale.US.getCountry()) ||
                      defaultCountry.equals(Locale.CANADA.getCountry()))) {
                     iw = MediaSize.NA.LETTER.getX(Size2DSyntax.INCH) - 0.5f;
                     ih = MediaSize.NA.LETTER.getY(Size2DSyntax.INCH) - 0.5f;
                 } else {
                     iw = MediaSize.ISO.A4.getX(Size2DSyntax.INCH) - 0.5f;
                     ih = MediaSize.ISO.A4.getY(Size2DSyntax.INCH) - 0.5f;
                 }
                 return new MediaPrintableArea(0.25f, 0.25f, iw, ih,
                                               MediaPrintableArea.INCH);
             }
        } else if (category == NumberUp.class) {
            return new NumberUp(1); // for CUPS this is always 1
        } else if (category == OrientationRequested.class) {
            if (attribClass != null) {
                switch (attribClass.getIntValue()) {
                default:
                case 3: return OrientationRequested.PORTRAIT;
                case 4: return OrientationRequested.LANDSCAPE;
                case 5: return OrientationRequested.REVERSE_LANDSCAPE;
                case 6: return OrientationRequested.REVERSE_PORTRAIT;
                }
            } else {
                return OrientationRequested.PORTRAIT;
            }
        } else if (category == PageRanges.class) {
            if (attribClass != null) {
                int[] range = attribClass.getIntRangeValue();
                return new PageRanges(range[0], range[1]);
            } else {
                return new PageRanges(1, Integer.MAX_VALUE);
            }
        } else if (category == RequestingUserName.class) {
            String userName = "";
            try {
              userName = System.getProperty("user.name", "");
            } catch (SecurityException se) {
            }
            return new RequestingUserName(userName, null);
        } else if (category == SheetCollate.class) {
            return SheetCollate.UNCOLLATED;
        } else if (category == Sides.class) {
            if (attribClass != null) {
                if (attribClass.getStringValue().endsWith("long-edge")) {
                    return Sides.TWO_SIDED_LONG_EDGE;
                } else if (attribClass.getStringValue().endsWith(
                                                           "short-edge")) {
                    return Sides.TWO_SIDED_SHORT_EDGE;
                }
            }
            return Sides.ONE_SIDED;
        } else if (category == PrinterResolution.class) {
             PrinterResolution[] supportedRes = getPrintResolutions();
             if ((supportedRes != null) && (supportedRes.length > 0)) {
                return supportedRes[0];
             } else {
                 return new PrinterResolution(300, 300, PrinterResolution.DPI);
             }
        }

        return null;
    }

    private PrinterResolution[] getPrintResolutions() {
        if (printerResolutions == null) {
            if (rawResolutions == null) {
              printerResolutions = new PrinterResolution[0];
            } else {
                int numRes = rawResolutions.length / 2;
                PrinterResolution[] pres = new PrinterResolution[numRes];
                for (int i=0; i < numRes; i++) {
                    pres[i] =  new PrinterResolution(rawResolutions[i*2],
                                                     rawResolutions[i*2+1],
                                                     PrinterResolution.DPI);
                }
                printerResolutions = pres;
            }
        }
        return printerResolutions;
    }

    private boolean isSupportedResolution(PrinterResolution res) {
        PrinterResolution[] supportedRes = getPrintResolutions();
        if (supportedRes != null) {
            for (int i=0; i<supportedRes.length; i++) {
                if (res.equals(supportedRes[i])) {
                    return true;
                }
            }
        }
        return false;
    }

    public ServiceUIFactory getServiceUIFactory() {
        return null;
    }

    public void wakeNotifier() {
        synchronized (this) {
            if (notifier != null) {
                notifier.wake();
            }
        }
    }

    public void addPrintServiceAttributeListener(
                                 PrintServiceAttributeListener listener) {
        synchronized (this) {
            if (listener == null) {
                return;
            }
            if (notifier == null) {
                notifier = new ServiceNotifier(this);
            }
            notifier.addListener(listener);
        }
    }

    public void removePrintServiceAttributeListener(
                                  PrintServiceAttributeListener listener) {
        synchronized (this) {
            if (listener == null || notifier == null ) {
                return;
            }
            notifier.removeListener(listener);
            if (notifier.isEmpty()) {
                notifier.stopNotifier();
                notifier = null;
            }
        }
    }

    String getDest() {
        return printer;
    }

    public String getName() {
        /*
         * Mac is using printer-info IPP attribute for its human-readable printer
         * name and is also the identifier used in NSPrintInfo:setPrinter.
         */
        if (PrintServiceLookupProvider.isMac()) {
            PrintServiceAttributeSet psaSet = this.getAttributes();
            if (psaSet != null) {
                PrinterInfo pName = (PrinterInfo)psaSet.get(PrinterInfo.class);
                if (pName != null) {
                    return pName.toString();
                }
            }
        }
        return printer;
    }


    public boolean usesClass(Class<?> c) {
        return (c == sun.print.PSPrinterJob.class);
    }


    public static HttpURLConnection getIPPConnection(URL url) {
        HttpURLConnection connection;
        URLConnection urlc;
        try {
            urlc = url.openConnection();
        } catch (java.io.IOException ioe) {
            return null;
        }
        if (!(urlc instanceof HttpURLConnection)) {
            return null;
        }
        connection = (HttpURLConnection)urlc;
        connection.setUseCaches(false);
        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setRequestProperty("Content-type", "application/ipp");
        return connection;
    }


    public synchronized boolean isPostscript() {
        if (isPS == null) {
           isPS = Boolean.TRUE;
            if (isCupsPrinter) {
                try {
                    urlConnection = getIPPConnection(
                                             newURL(myURL+".ppd"));

                   InputStream is = urlConnection.getInputStream();
                   if (is != null) {
                       BufferedReader d = new BufferedReader(
                               new InputStreamReader(is, ISO_8859_1));
                       String lineStr;
                       while ((lineStr = d.readLine()) != null) {
                           if (lineStr.startsWith("*cupsFilter:")) {
                               isPS = Boolean.FALSE;
                               break;
                           }
                       }
                    }
                } catch (java.io.IOException e) {
                    debug_println(" isPostscript, e= "+e);
                    /* if PPD is not found, this may be a raw printer
                       and in this case it is assumed that it is a
                       Postscript printer */
                    // do nothing
                }
            }
        }
        return isPS.booleanValue();
    }


    private void opGetAttributes() {
        try {
            debug_println(debugPrefix+"opGetAttributes myURI "+myURI+" myURL "+myURL);

            AttributeClass[] attClNoUri = {
                AttributeClass.ATTRIBUTES_CHARSET,
                AttributeClass.ATTRIBUTES_NATURAL_LANGUAGE};

            AttributeClass[] attCl = {
                AttributeClass.ATTRIBUTES_CHARSET,
                AttributeClass.ATTRIBUTES_NATURAL_LANGUAGE,
                new AttributeClass("printer-uri",
                                   AttributeClass.TAG_URI,
                                   ""+myURI)};

            @SuppressWarnings("removal")
            OutputStream os = java.security.AccessController.
                doPrivileged(new java.security.PrivilegedAction<OutputStream>() {
                    public OutputStream run() {
                        try {
                            return urlConnection.getOutputStream();
                        } catch (Exception e) {
                        }
                        return null;
                    }
                });

            if (os == null) {
                return;
            }

            boolean success = (myURI == null) ?
                writeIPPRequest(os, OP_GET_ATTRIBUTES, attClNoUri) :
                writeIPPRequest(os, OP_GET_ATTRIBUTES, attCl);
            if (success) {
                InputStream is = null;
                if ((is = urlConnection.getInputStream())!=null) {
                    HashMap<String, AttributeClass>[] responseMap = readIPPResponse(is);

                    if (responseMap != null && responseMap.length > 0) {
                        getAttMap = responseMap[0];
                        // If there is extra hashmap created due to duplicate
                        // key/attribute present in IPPresponse, then use that
                        // map too by appending to getAttMap after removing the
                        // duplicate key/value
                        if (responseMap.length > 1) {
                            for (int i = 1; i < responseMap.length; i++) {
                                for (Map.Entry<String, AttributeClass> entry : responseMap[i].entrySet()) {
                                    if (!getAttMap.containsKey(entry.getValue())) {
                                        getAttMap.put(entry.getKey(), entry.getValue());
                                    }
                                }
                            }
                        }
                    }
                } else {
                    debug_println(debugPrefix+"opGetAttributes - null input stream");
                }
                is.close();
            }
            os.close();
        } catch (java.io.IOException e) {
            debug_println(debugPrefix+"opGetAttributes - input/output stream: "+e);
        }
    }


    public static boolean writeIPPRequest(OutputStream os,
                                           String operCode,
                                           AttributeClass[] attCl) {
        OutputStreamWriter osw = new OutputStreamWriter(os, UTF_8);
        debug_println(debugPrefix+"writeIPPRequest, op code= "+operCode);
        char[] opCode =  new char[2];
        opCode[0] =  (char)Byte.parseByte(operCode.substring(0,2), 16);
        opCode[1] =  (char)Byte.parseByte(operCode.substring(2,4), 16);
        char[] bytes = {0x01, 0x01, 0x00, 0x01};
        try {
            osw.write(bytes, 0, 2); // version number
            osw.write(opCode, 0, 2); // operation code
            bytes[0] = 0x00; bytes[1] = 0x00;
            osw.write(bytes, 0, 4); // request ID #1

            bytes[0] = 0x01; // operation-group-tag
            osw.write(bytes[0]);

            String valStr;
            char[] lenStr;

            AttributeClass ac;
            for (int i=0; i < attCl.length; i++) {
                ac = attCl[i];
                osw.write(ac.getType()); // value tag

                lenStr = ac.getLenChars();
                osw.write(lenStr, 0, 2); // length
                osw.write(""+ac, 0, ac.getName().length());

                // check if string range (0x35 -> 0x49)
                if (ac.getType() >= AttributeClass.TAG_TEXT_LANGUAGE &&
                    ac.getType() <= AttributeClass.TAG_MIME_MEDIATYPE){
                    valStr = (String)ac.getObjectValue();
                    bytes[0] = 0; bytes[1] = (char)valStr.length();
                    osw.write(bytes, 0, 2);
                    osw.write(valStr, 0, valStr.length());
                } // REMIND: need to support other value tags but for CUPS
                // string is all we need.
            }

            osw.write(GRPTAG_END_ATTRIBUTES);
            osw.flush();
            osw.close();
        } catch (java.io.IOException ioe) {
            debug_println(debugPrefix+"writeIPPRequest, IPPPrintService Exception in writeIPPRequest: "+ioe);
            return false;
        }
        return true;
    }


    public static HashMap<String, AttributeClass>[] readIPPResponse(InputStream inputStream) {

        if (inputStream == null) {
            return null;
        }

        byte[] response = new byte[MAX_ATTRIBUTE_LENGTH];
        try {

            DataInputStream ois = new DataInputStream(inputStream);

            // read status and ID
            if ((ois.read(response, 0, 8) > -1) &&
                (response[2] == STATUSCODE_SUCCESS)) {

                ByteArrayOutputStream outObj;
                int counter=0;
                short len = 0;
                String attribStr = null;
                // assign default value
                byte valTagByte = AttributeClass.TAG_KEYWORD;
                ArrayList<HashMap<String, AttributeClass>> respList = new ArrayList<>();
                HashMap<String, AttributeClass> responseMap = new HashMap<>();

                response[0] = ois.readByte();

                // check for group tags
                while ((response[0] >= GRPTAG_OP_ATTRIBUTES) &&
                       (response[0] <= GRPTAG_PRINTER_ATTRIBUTES)
                          && (response[0] != GRPTAG_END_ATTRIBUTES)) {
                    debug_println(debugPrefix+"readIPPResponse, checking group tag,  response[0]= "+
                                  response[0]);

                    outObj = new ByteArrayOutputStream();
                    //make sure counter and attribStr are re-initialized
                    counter = 0;
                    attribStr = null;

                    // read value tag
                    response[0] = ois.readByte();
                    while (response[0] >= AttributeClass.TAG_UNSUPPORTED_VALUE &&
                           response[0] <= AttributeClass.TAG_MEMBER_ATTRNAME) {
                        // read name length
                        len  = ois.readShort();

                        // If current value is not part of previous attribute
                        // then close stream and add it to HashMap.
                        // It is part of previous attribute if name length=0.
                        if ((len != 0) && (attribStr != null)) {
                            //last byte is the total # of values
                            outObj.write(counter);
                            outObj.flush();
                            outObj.close();
                            byte[] outArray = outObj.toByteArray();

                            // if key exists, new HashMap
                            if (responseMap.containsKey(attribStr)) {
                                respList.add(responseMap);
                                responseMap = new HashMap<>();
                            }

                            // exclude those that are unknown
                            if (valTagByte >= AttributeClass.TAG_INT) {
                                AttributeClass ac =
                                    new AttributeClass(attribStr,
                                                       valTagByte,
                                                       outArray);

                                responseMap.put(ac.getName(), ac);
                                debug_println(debugPrefix+ "readIPPResponse "+ac);
                            }

                            outObj = new ByteArrayOutputStream();
                            counter = 0; //reset counter
                        }
                        //check if this is new value tag
                        if (counter == 0) {
                            valTagByte = response[0];
                        }
                        // read attribute name
                        if (len != 0) {
                            // read "len" characters
                            // make sure it doesn't exceed the maximum
                            if (len > MAX_ATTRIBUTE_LENGTH) {
                                response = new byte[len]; // expand as needed
                            }
                            ois.read(response, 0, len);
                            attribStr = new String(response, 0, len);
                        }
                        // read value length
                        len  = ois.readShort();
                        // write name length
                        outObj.write(len);
                        // read value, make sure it doesn't exceed the maximum
                        if (len > MAX_ATTRIBUTE_LENGTH) {
                            response = new byte[len]; // expand as needed
                        }
                        ois.read(response, 0, len);
                        // write value of "len" length
                        outObj.write(response, 0, len);
                        counter++;
                        // read next byte
                        response[0] = ois.readByte();
                    }

                    if (attribStr != null) {
                        outObj.write(counter);
                        outObj.flush();
                        outObj.close();

                        // if key exists in old HashMap, new HashMap
                        if ((counter != 0) &&
                            responseMap.containsKey(attribStr)) {
                            respList.add(responseMap);
                            responseMap = new HashMap<>();
                        }

                        byte[] outArray = outObj.toByteArray();

                        AttributeClass ac =
                            new AttributeClass(attribStr,
                                               valTagByte,
                                               outArray);
                        responseMap.put(ac.getName(), ac);
                    }
                }
                ois.close();
                if ((responseMap != null) && (responseMap.size() > 0)) {
                    respList.add(responseMap);
                }
                @SuppressWarnings({"unchecked", "rawtypes"})
                HashMap<String, AttributeClass>[] tmp  =
                    respList.toArray((HashMap<String, AttributeClass>[])new HashMap[respList.size()]);
                return tmp;
            } else {
                debug_println(debugPrefix+
                          "readIPPResponse client error, IPP status code: 0x"+
                          toHex(response[2]) + toHex(response[3]));
                return null;
            }

        } catch (java.io.IOException e) {
            debug_println(debugPrefix+"readIPPResponse: "+e);
            if (debugPrint) {
                e.printStackTrace();
            }
            return null;
        }
    }

    private static String toHex(byte v) {
        String s = Integer.toHexString(v&0xff);
        return (s.length() == 2) ? s :  "0"+s;
    }

    public String toString() {
        return "IPP Printer : " + getName();
    }

    public boolean equals(Object obj) {
        return  (obj == this ||
                 (obj instanceof IPPPrintService &&
                  ((IPPPrintService)obj).getName().equals(getName())));
    }

    public int hashCode() {
        return this.getClass().hashCode()+getName().hashCode();
    }

    @SuppressWarnings("deprecation")
    private static URL newURL(String spec) throws MalformedURLException {
        return new URL(spec);
    }
}
