javax.imageio.spi.IIORegistry Java Examples

/**
 * Retrieves a JPEG reader which supports native JPEG stream metadata.
 */
private static ImageReader getJPEGTablesReader() {
    ImageReader jpegReader = null;

    try {
        IIORegistry registry = IIORegistry.getDefaultInstance();
        Iterator<?> readerSPIs =
            registry.getServiceProviders(ImageReaderSpi.class,
                                         new JPEGSPIFilter(),
                                         true);
        if(readerSPIs.hasNext()) {
            ImageReaderSpi jpegReaderSPI =
                (ImageReaderSpi)readerSPIs.next();
            jpegReader = jpegReaderSPI.createReaderInstance();
        }
    } catch(Exception e) {
        // Ignore it ...
    }

    return jpegReader;
}
 

public static void registrySupportedImageFormats() {
        IIORegistry registry = IIORegistry.getDefaultInstance();
//        registry.registerServiceProvider(new TIFFImageWriterSpi());
//        registry.registerServiceProvider(new TIFFImageReaderSpi());
//        registry.registerServiceProvider(new BMPImageWriterSpi());
//        registry.registerServiceProvider(new BMPImageReaderSpi());
//        registry.registerServiceProvider(new GIFImageWriterSpi());
//        registry.registerServiceProvider(new WBMPImageWriterSpi());
//        registry.registerServiceProvider(new WBMPImageReaderSpi());

        registry.registerServiceProvider(new RawImageWriterSpi());
        registry.registerServiceProvider(new RawImageReaderSpi());
        registry.registerServiceProvider(new PCXImageWriterSpi());
        registry.registerServiceProvider(new PCXImageReaderSpi());
        registry.registerServiceProvider(new PNMImageWriterSpi());
        registry.registerServiceProvider(new PNMImageReaderSpi());
//        registry.registerServiceProvider(new J2KImageWriterSpi());
//        registry.registerServiceProvider(new J2KImageReaderSpi());

//        String readFormats[] = ImageIO.getReaderFormatNames();
//        String writeFormats[] = ImageIO.getWriterFormatNames();
//        logger.info("Readers:" + Arrays.asList(readFormats));
//        logger.info("Writers:" + Arrays.asList(writeFormats));
//Readers:[JPG, JPEG 2000, tiff, bmp, PCX, gif, WBMP, PNG, RAW, JPEG, PNM, tif, TIFF, wbmp, jpeg, jpg, JPEG2000, BMP, pcx, GIF, png, raw, pnm, TIF, jpeg2000, jpeg 2000]
//Writers:[JPEG 2000, JPG, tiff, bmp, PCX, gif, WBMP, PNG, RAW, JPEG, PNM, tif, TIFF, wbmp, jpeg, jpg, JPEG2000, BMP, pcx, GIF, png, raw, pnm, TIF, jpeg2000, jpeg 2000]
    }
 

public static void main(final String[] args) throws IOException {
    final IIORegistry registry = IIORegistry.getDefaultInstance();
    final Iterator<ImageWriterSpi> iter = registry.getServiceProviders(
            ImageWriterSpi.class, provider -> true, true);

    // Validates all supported ImageWriters
    int numFailures = 0;
    while (iter.hasNext()) {
        final WriteAfterAbort writeAfterAbort = new WriteAfterAbort();
        final ImageWriter writer = iter.next().createWriterInstance();
        System.out.println("ImageWriter = " + writer);
        try {
            writeAfterAbort.test(writer);
        } catch (Exception e) {
            System.err.println("Test failed for \""
                + writer.getOriginatingProvider().getFormatNames()[0]
                + "\" format.");
            numFailures++;
        }
    }
    if (numFailures == 0) {
        System.out.println("Test passed.");
    } else {
        throw new RuntimeException("Test failed.");
    }
}
 

public static void main (String[] args) throws IIOException {
    // Verify getReaderMIMETypes() behavior by keeping MIMEType as null.
    TestImageReaderSpi mimeNullReadSpi =
            new TestImageReaderSpi(FORMATNAMES, SUFFIXES, null);
    IIORegistry.getDefaultInstance().
            registerServiceProvider(mimeNullReadSpi);
    ImageIO.getReaderMIMETypes();
    IIORegistry.getDefaultInstance().
            deregisterServiceProvider(mimeNullReadSpi);

    /*
     * Verify getReaderFileSuffixes() behavior by keeping
     * file suffix as null.
     */
    TestImageReaderSpi suffixNullReadSpi =
            new TestImageReaderSpi(FORMATNAMES, null, MIMETYPES);
    IIORegistry.getDefaultInstance().
            registerServiceProvider(suffixNullReadSpi);
    ImageIO.getReaderFileSuffixes();
    IIORegistry.getDefaultInstance().
            deregisterServiceProvider(suffixNullReadSpi);
}
 

public static void main(String[] args) throws IOException {
    MarkTryFinallyReproducerSpi spi = new MarkTryFinallyReproducerSpi();
    IIORegistry.getDefaultInstance().registerServiceProvider(spi);

    ImageInputStream iis1 =
      new NotClosingImageInputStream(ImageIO.createImageInputStream(new ByteArrayInputStream(bmp)));
    iis1.readByte();
    iis1.mark();
    long p1 = iis1.getStreamPosition();
    iis1.readByte();
    iis1.mark();
    long p2 = iis1.getStreamPosition();
    BufferedImage bi1 = ImageIO.read(iis1);
    iis1.reset();
    long pn2 = iis1.getStreamPosition();
    iis1.reset();
    long pn1 = iis1.getStreamPosition();
    if (p1 != pn1 || p2!= pn2) {
        throw new RuntimeException("Exception from call to canDecodeInput in ImageIO. " +
                                   "Corrupted stack in ImageInputStream");
    }

}
 

public DeregisterOrderedSpiTest() {

         try {

             ServiceRegistry reg = IIORegistry.getDefaultInstance();
             ImageReaderSpi gifSpi = (ImageReaderSpi) reg.getServiceProviderByClass(com.sun.imageio.plugins.gif.GIFImageReaderSpi.class);
             ImageReaderSpi pngSpi = (ImageReaderSpi) reg.getServiceProviderByClass(com.sun.imageio.plugins.png.PNGImageReaderSpi.class);
             ImageReaderSpi jpgSpi = (ImageReaderSpi) reg.getServiceProviderByClass(com.sun.imageio.plugins.jpeg.JPEGImageReaderSpi.class);
             ImageReaderSpi bmpSpi = (ImageReaderSpi) reg.getServiceProviderByClass(com.sun.imageio.plugins.bmp.BMPImageReaderSpi.class);

             boolean ordered = reg.setOrdering(ImageReaderSpi.class, pngSpi,
                                               gifSpi);

             ordered = reg.setOrdering(ImageReaderSpi.class, gifSpi, jpgSpi);
             ordered = reg.setOrdering(ImageReaderSpi.class, bmpSpi, gifSpi);
             reg.deregisterServiceProvider(gifSpi);
             System.out.println("PASS");

         } catch (Exception e) {
             System.out.println("FAIL");
             throw new RuntimeException("Deregistering a spi object involved in some "
                                        + "ordering throws the following exception: " + e.toString());
         }
     }
 

public SpiTest() {
    testImageReaderSpiConstructor();
    testImageWriterSpiConstructor();

    ServiceRegistry registry = IIORegistry.getDefaultInstance();
    Iterator readers = registry.getServiceProviders(ImageReaderSpi.class,
                                                    false);
    while (readers.hasNext()) {
        ImageReaderSpi rspi = (ImageReaderSpi)readers.next();
        System.out.println("*** Testing " + rspi.getClass().getName());
        testSpi(rspi);
    }

    Iterator writers = registry.getServiceProviders(ImageWriterSpi.class,
                                                    false);
    while (writers.hasNext()) {
        ImageWriterSpi wspi = (ImageWriterSpi)writers.next();
        System.out.println("*** Testing " + wspi.getClass().getName());
        testSpi(wspi);
    }
}
 

private static void initImageIO() {
    // todo - actually this should be done in the activator of ceres-jai which does not exist yet
    Lookup.Result<ModuleInfo> moduleInfos = Lookup.getDefault().lookupResult(ModuleInfo.class);
    String ceresJaiCodeName = "org.esa.snap.ceres.jai";
    Optional<? extends ModuleInfo> info = moduleInfos.allInstances().stream().filter(
            moduleInfo -> ceresJaiCodeName.equals(moduleInfo.getCodeName())).findFirst();

    if (info.isPresent()) {
        ClassLoader classLoader = info.get().getClassLoader();
        IIORegistry iioRegistry = IIORegistry.getDefaultInstance();
        iioRegistry.registerServiceProviders(IIORegistry.lookupProviders(ImageReaderSpi.class, classLoader));
        iioRegistry.registerServiceProviders(IIORegistry.lookupProviders(ImageWriterSpi.class, classLoader));
    } else {
        LOG.warning(String.format("Module '%s' not found. Not able to load image-IO services.", ceresJaiCodeName));
    }
}
 

public OrderingTest() {

         ServiceRegistry reg = IIORegistry.getDefaultInstance();
         ImageReaderSpi gifSpi = (ImageReaderSpi) reg.getServiceProviderByClass(com.sun.imageio.plugins.gif.GIFImageReaderSpi.class);
         ImageReaderSpi pngSpi = (ImageReaderSpi) reg.getServiceProviderByClass(com.sun.imageio.plugins.png.PNGImageReaderSpi.class);

         boolean ordered = reg.setOrdering(ImageReaderSpi.class, gifSpi, pngSpi);

         ordered = reg.setOrdering(ImageReaderSpi.class, pngSpi, gifSpi);

         boolean unordered = reg.unsetOrdering(ImageReaderSpi.class, gifSpi,
                                               pngSpi);
         boolean unordered1 = reg.unsetOrdering(ImageReaderSpi.class, gifSpi,
                                                pngSpi);

         if (unordered1) {
             throw new RuntimeException("FAIL: Ordering 2 spi objects in the  "
                                        + "reverse direction does not remove the previous ordering "
                                        + "set between the spi objects and hence unsetOrdering() "
                                        + "returns true for the same spi objects when called consecutively");
         } else {
             System.out.println("PASS");
         }

     }
 

public SpiTest() {
    testImageReaderSpiConstructor();
    testImageWriterSpiConstructor();

    ServiceRegistry registry = IIORegistry.getDefaultInstance();
    Iterator readers = registry.getServiceProviders(ImageReaderSpi.class,
                                                    false);
    while (readers.hasNext()) {
        ImageReaderSpi rspi = (ImageReaderSpi)readers.next();
        System.out.println("*** Testing " + rspi.getClass().getName());
        testSpi(rspi);
    }

    Iterator writers = registry.getServiceProviders(ImageWriterSpi.class,
                                                    false);
    while (writers.hasNext()) {
        ImageWriterSpi wspi = (ImageWriterSpi)writers.next();
        System.out.println("*** Testing " + wspi.getClass().getName());
        testSpi(wspi);
    }
}
 

public DeregisterOrderedSpiTest() {

         try {

             ServiceRegistry reg = IIORegistry.getDefaultInstance();
             ImageReaderSpi gifSpi = (ImageReaderSpi) reg.getServiceProviderByClass(com.sun.imageio.plugins.gif.GIFImageReaderSpi.class);
             ImageReaderSpi pngSpi = (ImageReaderSpi) reg.getServiceProviderByClass(com.sun.imageio.plugins.png.PNGImageReaderSpi.class);
             ImageReaderSpi jpgSpi = (ImageReaderSpi) reg.getServiceProviderByClass(com.sun.imageio.plugins.jpeg.JPEGImageReaderSpi.class);
             ImageReaderSpi bmpSpi = (ImageReaderSpi) reg.getServiceProviderByClass(com.sun.imageio.plugins.bmp.BMPImageReaderSpi.class);

             boolean ordered = reg.setOrdering(ImageReaderSpi.class, pngSpi,
                                               gifSpi);

             ordered = reg.setOrdering(ImageReaderSpi.class, gifSpi, jpgSpi);
             ordered = reg.setOrdering(ImageReaderSpi.class, bmpSpi, gifSpi);
             reg.deregisterServiceProvider(gifSpi);
             System.out.println("PASS");

         } catch (Exception e) {
             System.out.println("FAIL");
             throw new RuntimeException("Deregistering a spi object involved in some "
                                        + "ordering throws the following exception: " + e.toString());
         }
     }
 

/**
 * Retrieves a JPEG reader which supports native JPEG stream metadata.
 */
private static ImageReader getJPEGTablesReader() {
    ImageReader jpegReader = null;

    try {
        IIORegistry registry = IIORegistry.getDefaultInstance();
        Iterator<?> readerSPIs =
            registry.getServiceProviders(ImageReaderSpi.class,
                                         new JPEGSPIFilter(),
                                         true);
        if(readerSPIs.hasNext()) {
            ImageReaderSpi jpegReaderSPI =
                (ImageReaderSpi)readerSPIs.next();
            jpegReader = jpegReaderSPI.createReaderInstance();
        }
    } catch(Exception e) {
        // Ignore it ...
    }

    return jpegReader;
}
 

private static void initIIOWriteFormats() {
    List spis = new ArrayList();
    List shortNames = new ArrayList();

    ImageIO.scanForPlugins();
    IIORegistry registry = IIORegistry.getDefaultInstance();
    java.util.Iterator writerspis =
        registry.getServiceProviders(ImageWriterSpi.class, false);
    while (writerspis.hasNext()) {
        // REMIND: there could be more than one non-core plugin for
        // a particular format, as is the case for JPEG2000 in the JAI
        // IIO Tools package, so we should support that somehow
        ImageWriterSpi spi = (ImageWriterSpi)writerspis.next();
        String klass = spi.getClass().getName();
        String format = spi.getFormatNames()[0].toLowerCase();
        String suffix = spi.getFileSuffixes()[0].toLowerCase();
        if (suffix == null || suffix.equals("")) {
            suffix = format;
        }
        String shortName;
        if (klass.startsWith("com.sun.imageio.plugins")) {
            shortName = "core-" + suffix;
        } else {
            shortName = "ext-" + suffix;
        }
        spis.add(spi);
        shortNames.add(shortName);
    }

    imageioWriterSpis = new ImageWriterSpi[spis.size()];
    imageioWriterSpis = (ImageWriterSpi[])spis.toArray(imageioWriterSpis);
    imageioWriteFormatShortNames = new String[shortNames.size()];
    imageioWriteFormatShortNames =
        (String[])shortNames.toArray(imageioWriteFormatShortNames);
}
 

private static void initIIOWriteFormats() {
    List spis = new ArrayList();
    List shortNames = new ArrayList();

    ImageIO.scanForPlugins();
    IIORegistry registry = IIORegistry.getDefaultInstance();
    java.util.Iterator writerspis =
        registry.getServiceProviders(ImageWriterSpi.class, false);
    while (writerspis.hasNext()) {
        // REMIND: there could be more than one non-core plugin for
        // a particular format, as is the case for JPEG2000 in the JAI
        // IIO Tools package, so we should support that somehow
        ImageWriterSpi spi = (ImageWriterSpi)writerspis.next();
        String klass = spi.getClass().getName();
        String format = spi.getFormatNames()[0].toLowerCase();
        String suffix = spi.getFileSuffixes()[0].toLowerCase();
        if (suffix == null || suffix.equals("")) {
            suffix = format;
        }
        String shortName;
        if (klass.startsWith("com.sun.imageio.plugins")) {
            shortName = "core-" + suffix;
        } else {
            shortName = "ext-" + suffix;
        }
        spis.add(spi);
        shortNames.add(shortName);
    }

    imageioWriterSpis = new ImageWriterSpi[spis.size()];
    imageioWriterSpis = (ImageWriterSpi[])spis.toArray(imageioWriterSpis);
    imageioWriteFormatShortNames = new String[shortNames.size()];
    imageioWriteFormatShortNames =
        (String[])shortNames.toArray(imageioWriteFormatShortNames);
}
 

private static void initIIOReadFormats() {
    List spis = new ArrayList();
    List shortNames = new ArrayList();

    ImageIO.scanForPlugins();
    IIORegistry registry = IIORegistry.getDefaultInstance();
    java.util.Iterator readerspis =
        registry.getServiceProviders(ImageReaderSpi.class, false);
    while (readerspis.hasNext()) {
        // REMIND: there could be more than one non-core plugin for
        // a particular format, as is the case for JPEG2000 in the JAI
        // IIO Tools package, so we should support that somehow
        ImageReaderSpi spi = (ImageReaderSpi)readerspis.next();
        String klass = spi.getClass().getName();
        String format = spi.getFormatNames()[0].toLowerCase();
        String suffix = spi.getFileSuffixes()[0].toLowerCase();
        if (suffix == null || suffix.equals("")) {
            suffix = format;
        }
        String shortName;
        if (klass.startsWith("com.sun.imageio.plugins")) {
            shortName = "core-" + suffix;
        } else {
            shortName = "ext-" + suffix;
        }
        spis.add(spi);
        shortNames.add(shortName);
    }

    imageioReaderSpis = new ImageReaderSpi[spis.size()];
    imageioReaderSpis = (ImageReaderSpi[])spis.toArray(imageioReaderSpis);
    imageioReadFormatShortNames = new String[shortNames.size()];
    imageioReadFormatShortNames =
        (String[])shortNames.toArray(imageioReadFormatShortNames);
}
 

private static void initIIOReadFormats() {
    List spis = new ArrayList();
    List shortNames = new ArrayList();

    ImageIO.scanForPlugins();
    IIORegistry registry = IIORegistry.getDefaultInstance();
    java.util.Iterator readerspis =
        registry.getServiceProviders(ImageReaderSpi.class, false);
    while (readerspis.hasNext()) {
        // REMIND: there could be more than one non-core plugin for
        // a particular format, as is the case for JPEG2000 in the JAI
        // IIO Tools package, so we should support that somehow
        ImageReaderSpi spi = (ImageReaderSpi)readerspis.next();
        String klass = spi.getClass().getName();
        String format = spi.getFormatNames()[0].toLowerCase();
        String suffix = spi.getFileSuffixes()[0].toLowerCase();
        if (suffix == null || suffix.equals("")) {
            suffix = format;
        }
        String shortName;
        if (klass.startsWith("com.sun.imageio.plugins")) {
            shortName = "core-" + suffix;
        } else {
            shortName = "ext-" + suffix;
        }
        spis.add(spi);
        shortNames.add(shortName);
    }

    imageioReaderSpis = new ImageReaderSpi[spis.size()];
    imageioReaderSpis = (ImageReaderSpi[])spis.toArray(imageioReaderSpis);
    imageioReadFormatShortNames = new String[shortNames.size()];
    imageioReadFormatShortNames =
        (String[])shortNames.toArray(imageioReadFormatShortNames);
}
 

public static void main(final String[] args) throws Exception {
    final IIORegistry registry = IIORegistry.getDefaultInstance();
    final Iterator<ImageWriterSpi> iter =
            registry.getServiceProviders(ImageWriterSpi.class,
                    provider -> true, true);
    // Validates all supported ImageWriters
    while (iter.hasNext()) {
        final ImageWriter writer = iter.next().createWriterInstance();
        System.out.println("ImageWriter = " + writer);
        test(writer);
    }
    System.out.println("Test passed");
}
 

private static void initIIOWriteFormats() {
    List spis = new ArrayList();
    List shortNames = new ArrayList();

    ImageIO.scanForPlugins();
    IIORegistry registry = IIORegistry.getDefaultInstance();
    java.util.Iterator writerspis =
        registry.getServiceProviders(ImageWriterSpi.class, false);
    while (writerspis.hasNext()) {
        // REMIND: there could be more than one non-core plugin for
        // a particular format, as is the case for JPEG2000 in the JAI
        // IIO Tools package, so we should support that somehow
        ImageWriterSpi spi = (ImageWriterSpi)writerspis.next();
        String klass = spi.getClass().getName();
        String format = spi.getFormatNames()[0].toLowerCase();
        String suffix = spi.getFileSuffixes()[0].toLowerCase();
        if (suffix == null || suffix.equals("")) {
            suffix = format;
        }
        String shortName;
        if (klass.startsWith("com.sun.imageio.plugins")) {
            shortName = "core-" + suffix;
        } else {
            shortName = "ext-" + suffix;
        }
        spis.add(spi);
        shortNames.add(shortName);
    }

    imageioWriterSpis = new ImageWriterSpi[spis.size()];
    imageioWriterSpis = (ImageWriterSpi[])spis.toArray(imageioWriterSpis);
    imageioWriteFormatShortNames = new String[shortNames.size()];
    imageioWriteFormatShortNames =
        (String[])shortNames.toArray(imageioWriteFormatShortNames);
}
 

public void run() {
//          System.out.println("Thread " + threadName + " in thread group " +
//                             getThreadGroup().getName());

        // Create a new AppContext as though we were an applet
        SunToolkit.createNewAppContext();

        // Get default registry and store reference
        this.registry = IIORegistry.getDefaultInstance();

        for (int i = 0; i < 10; i++) {
//              System.out.println(threadName +
//                                 ": setting cache parameters to " +
//                                 useCache + ", " + cacheDirectory);
            ImageIO.setUseCache(useCache);
            ImageIO.setCacheDirectory(cacheDirectory);

            try {
                sleep(1000L);
            } catch (InterruptedException e) {
            }

//              System.out.println(threadName + ": reading cache parameters");
            boolean newUseCache = ImageIO.getUseCache();
            File newCacheDirectory = ImageIO.getCacheDirectory();
            if (newUseCache != useCache ||
                newCacheDirectory != cacheDirectory) {
//                  System.out.println(threadName + ": got " +
//                                     newUseCache + ", " +
//                                     newCacheDirectory);
//                  System.out.println(threadName + ": crosstalk encountered!");
                gotCrosstalk = true;
            }
        }
    }
 

public DeregisterAllSpiTest() throws Exception {
    ImageReaderSpi BMPSpi = new BMPImageReaderSPI();
    IIORegistry.getDefaultInstance().registerServiceProvider(BMPSpi);

    System.out.println("Reader Format Names available in the registry");
    String formatNames[] = ImageIO.getReaderFormatNames();
    if( formatNames == null || formatNames.length <= 0) {
        throw new RuntimeException("No registered ImageReaders!");
    }
    for (int x=0; x < formatNames.length; x++) {
        System.out.println("format "+formatNames[x]);
    }

    IIORegistry.getDefaultInstance().deregisterAll();

    System.out.println("\nReader Format Names after deregistering all SPIs");
    formatNames = ImageIO.getReaderFormatNames();
    if(formatNames.length == 0) {
        System.out.println("No readers available\n");
    } else {
        throw new RuntimeException("Some providers was not deregistered!");
    }

    IIORegistry.getDefaultInstance().registerServiceProvider(BMPSpi);
    System.out.println("Reader Format Names after re-register of BMP Plugin");
    formatNames = ImageIO.getReaderFormatNames();
    if(formatNames.length == 0) {
        throw new RuntimeException("Unable to register new SPI after deregisterAll()!");
    }
}
 

public RegisterPluginTwiceTest() throws Exception {
    BMPImageReaderSPI BMPSpi = new BMPImageReaderSPI();
    BMPImageReaderSPI BMPSpi1 = new BMPImageReaderSPI();

    IIORegistry regis = IIORegistry.getDefaultInstance();
    boolean res1
        = regis.registerServiceProvider(BMPSpi,
                                        javax.imageio.spi.ImageReaderSpi.class);
    boolean res2
        = regis.registerServiceProvider(BMPSpi1,
                                        javax.imageio.spi.ImageReaderSpi.class);

    if(!res1 || res2) {
        throw new RuntimeException("Bad returned values for registerServiceProvider");
    }
    Iterator it = regis.getServiceProviders(Class.forName("javax.imageio.spi.ImageReaderSpi"), true);
    int count = 0;
    while (it.hasNext()) {
        Object o = it.next();
        if(o instanceof BMPImageReaderSPI) {
            count++;
            System.out.println("Found next BMPImageReaderSPI, count = " +count);
        }
    }
    if(count > 1) {
        throw new RuntimeException("Too many instances of the BMPImageReaderSPI was registered!");
    }
}
 

private static void initIIOReadFormats() {
    List spis = new ArrayList();
    List shortNames = new ArrayList();

    ImageIO.scanForPlugins();
    IIORegistry registry = IIORegistry.getDefaultInstance();
    java.util.Iterator readerspis =
        registry.getServiceProviders(ImageReaderSpi.class, false);
    while (readerspis.hasNext()) {
        // REMIND: there could be more than one non-core plugin for
        // a particular format, as is the case for JPEG2000 in the JAI
        // IIO Tools package, so we should support that somehow
        ImageReaderSpi spi = (ImageReaderSpi)readerspis.next();
        String klass = spi.getClass().getName();
        String format = spi.getFormatNames()[0].toLowerCase();
        String suffix = spi.getFileSuffixes()[0].toLowerCase();
        if (suffix == null || suffix.equals("")) {
            suffix = format;
        }
        String shortName;
        if (klass.startsWith("com.sun.imageio.plugins")) {
            shortName = "core-" + suffix;
        } else {
            shortName = "ext-" + suffix;
        }
        spis.add(spi);
        shortNames.add(shortName);
    }

    imageioReaderSpis = new ImageReaderSpi[spis.size()];
    imageioReaderSpis = (ImageReaderSpi[])spis.toArray(imageioReaderSpis);
    imageioReadFormatShortNames = new String[shortNames.size()];
    imageioReadFormatShortNames =
        (String[])shortNames.toArray(imageioReadFormatShortNames);
}
 

private static void initIIOWriteFormats() {
    List spis = new ArrayList();
    List shortNames = new ArrayList();

    ImageIO.scanForPlugins();
    IIORegistry registry = IIORegistry.getDefaultInstance();
    java.util.Iterator writerspis =
        registry.getServiceProviders(ImageWriterSpi.class, false);
    while (writerspis.hasNext()) {
        // REMIND: there could be more than one non-core plugin for
        // a particular format, as is the case for JPEG2000 in the JAI
        // IIO Tools package, so we should support that somehow
        ImageWriterSpi spi = (ImageWriterSpi)writerspis.next();
        String klass = spi.getClass().getName();
        String format = spi.getFormatNames()[0].toLowerCase();
        String suffix = spi.getFileSuffixes()[0].toLowerCase();
        if (suffix == null || suffix.equals("")) {
            suffix = format;
        }
        String shortName;
        if (klass.startsWith("com.sun.imageio.plugins")) {
            shortName = "core-" + suffix;
        } else {
            shortName = "ext-" + suffix;
        }
        spis.add(spi);
        shortNames.add(shortName);
    }

    imageioWriterSpis = new ImageWriterSpi[spis.size()];
    imageioWriterSpis = (ImageWriterSpi[])spis.toArray(imageioWriterSpis);
    imageioWriteFormatShortNames = new String[shortNames.size()];
    imageioWriteFormatShortNames =
        (String[])shortNames.toArray(imageioWriteFormatShortNames);
}
 

public static void main(final String[] args) throws Exception {
    final IIORegistry registry = IIORegistry.getDefaultInstance();
    final Iterator<ImageWriterSpi> iter =
            registry.getServiceProviders(ImageWriterSpi.class,
                    provider -> true, true);
    // Validates all supported ImageWriters
    while (iter.hasNext()) {
        final ImageWriter writer = iter.next().createWriterInstance();
        System.out.println("ImageWriter = " + writer);
        test(writer);
    }
    System.out.println("Test passed");
}
 

private static void initIIOReadFormats() {
    List spis = new ArrayList();
    List shortNames = new ArrayList();

    ImageIO.scanForPlugins();
    IIORegistry registry = IIORegistry.getDefaultInstance();
    java.util.Iterator readerspis =
        registry.getServiceProviders(ImageReaderSpi.class, false);
    while (readerspis.hasNext()) {
        // REMIND: there could be more than one non-core plugin for
        // a particular format, as is the case for JPEG2000 in the JAI
        // IIO Tools package, so we should support that somehow
        ImageReaderSpi spi = (ImageReaderSpi)readerspis.next();
        String klass = spi.getClass().getName();
        String format = spi.getFormatNames()[0].toLowerCase();
        String suffix = spi.getFileSuffixes()[0].toLowerCase();
        if (suffix == null || suffix.equals("")) {
            suffix = format;
        }
        String shortName;
        if (klass.startsWith("com.sun.imageio.plugins")) {
            shortName = "core-" + suffix;
        } else {
            shortName = "ext-" + suffix;
        }
        spis.add(spi);
        shortNames.add(shortName);
    }

    imageioReaderSpis = new ImageReaderSpi[spis.size()];
    imageioReaderSpis = (ImageReaderSpi[])spis.toArray(imageioReaderSpis);
    imageioReadFormatShortNames = new String[shortNames.size()];
    imageioReadFormatShortNames =
        (String[])shortNames.toArray(imageioReadFormatShortNames);
}
 

public static void main(final String[] args) throws Exception {
    final IIORegistry registry = IIORegistry.getDefaultInstance();
    final Iterator<ImageWriterSpi> iter =
            registry.getServiceProviders(ImageWriterSpi.class,
                    provider -> true, true);
    // Validates all supported ImageWriters
    while (iter.hasNext()) {
        final ImageWriter writer = iter.next().createWriterInstance();
        System.out.println("ImageWriter = " + writer);
        test(writer);
    }
    System.out.println("Test passed");
}
 

public void run() {
//          System.out.println("Thread " + threadName + " in thread group " +
//                             getThreadGroup().getName());

        // Create a new AppContext as though we were an applet
        SunToolkit.createNewAppContext();

        // Get default registry and store reference
        this.registry = IIORegistry.getDefaultInstance();

        for (int i = 0; i < 10; i++) {
//              System.out.println(threadName +
//                                 ": setting cache parameters to " +
//                                 useCache + ", " + cacheDirectory);
            ImageIO.setUseCache(useCache);
            ImageIO.setCacheDirectory(cacheDirectory);

            try {
                sleep(1000L);
            } catch (InterruptedException e) {
            }

//              System.out.println(threadName + ": reading cache parameters");
            boolean newUseCache = ImageIO.getUseCache();
            File newCacheDirectory = ImageIO.getCacheDirectory();
            if (newUseCache != useCache ||
                newCacheDirectory != cacheDirectory) {
//                  System.out.println(threadName + ": got " +
//                                     newUseCache + ", " +
//                                     newCacheDirectory);
//                  System.out.println(threadName + ": crosstalk encountered!");
                gotCrosstalk = true;
            }
        }
    }
 

@Override
public void writeImage(final OutputStream out, final BufferedImage img,
	final JPEG2000CodecOptions options) throws IOException, ServiceException
{
	final ImageOutputStream ios = ImageIO.createImageOutputStream(out);

	final IIORegistry registry = IIORegistry.getDefaultInstance();
	final Iterator<J2KImageWriterSpi> iter = ServiceRegistry.lookupProviders(
		J2KImageWriterSpi.class);
	registry.registerServiceProviders(iter);
	final J2KImageWriterSpi spi = registry.getServiceProviderByClass(
		J2KImageWriterSpi.class);
	final J2KImageWriter writer = new J2KImageWriter(spi);
	writer.setOutput(ios);

	final String filter = options.lossless ? J2KImageWriteParam.FILTER_53
		: J2KImageWriteParam.FILTER_97;

	final IIOImage iioImage = new IIOImage(img, null, null);
	final J2KImageWriteParam param = (J2KImageWriteParam) writer
		.getDefaultWriteParam();
	param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
	param.setCompressionType("JPEG2000");
	param.setLossless(options.lossless);
	param.setFilter(filter);
	param.setCodeBlockSize(options.codeBlockSize);
	param.setEncodingRate(options.quality);
	if (options.tileWidth > 0 && options.tileHeight > 0) {
		param.setTiling(options.tileWidth, options.tileHeight,
			options.tileGridXOffset, options.tileGridYOffset);
	}
	if (options.numDecompositionLevels != null) {
		param.setNumDecompositionLevels(options.numDecompositionLevels
			.intValue());
	}
	writer.write(null, iioImage, param);
	ios.close();
}
 

public RegisterPluginTwiceTest() throws Exception {
    BMPImageReaderSPI BMPSpi = new BMPImageReaderSPI();
    BMPImageReaderSPI BMPSpi1 = new BMPImageReaderSPI();

    IIORegistry regis = IIORegistry.getDefaultInstance();
    boolean res1
        = regis.registerServiceProvider(BMPSpi,
                                        javax.imageio.spi.ImageReaderSpi.class);
    boolean res2
        = regis.registerServiceProvider(BMPSpi1,
                                        javax.imageio.spi.ImageReaderSpi.class);

    if(!res1 || res2) {
        throw new RuntimeException("Bad returned values for registerServiceProvider");
    }
    Iterator it = regis.getServiceProviders(Class.forName("javax.imageio.spi.ImageReaderSpi"), true);
    int count = 0;
    while (it.hasNext()) {
        Object o = it.next();
        if(o instanceof BMPImageReaderSPI) {
            count++;
            System.out.println("Found next BMPImageReaderSPI, count = " +count);
        }
    }
    if(count > 1) {
        throw new RuntimeException("Too many instances of the BMPImageReaderSPI was registered!");
    }
}
 

public DeregisterAllSpiTest() throws Exception {
    ImageReaderSpi BMPSpi = new BMPImageReaderSPI();
    IIORegistry.getDefaultInstance().registerServiceProvider(BMPSpi);

    System.out.println("Reader Format Names available in the registry");
    String formatNames[] = ImageIO.getReaderFormatNames();
    if( formatNames == null || formatNames.length <= 0) {
        throw new RuntimeException("No registered ImageReaders!");
    }
    for (int x=0; x < formatNames.length; x++) {
        System.out.println("format "+formatNames[x]);
    }

    IIORegistry.getDefaultInstance().deregisterAll();

    System.out.println("\nReader Format Names after deregistering all SPIs");
    formatNames = ImageIO.getReaderFormatNames();
    if(formatNames.length == 0) {
        System.out.println("No readers available\n");
    } else {
        throw new RuntimeException("Some providers was not deregistered!");
    }

    IIORegistry.getDefaultInstance().registerServiceProvider(BMPSpi);
    System.out.println("Reader Format Names after re-register of BMP Plugin");
    formatNames = ImageIO.getReaderFormatNames();
    if(formatNames.length == 0) {
        throw new RuntimeException("Unable to register new SPI after deregisterAll()!");
    }
}