下面列出了怎么用javax.imageio.spi.ImageReaderSpi的API类实例代码及写法,或者点击链接到github查看源代码。
/**
* Returns an <code>Iterator</code> containing all currently
* registered <code>ImageReader</code>s that claim to be able to
* decode files with the given suffix.
*
* @param fileSuffix a <code>String</code> containing a file
* suffix (<i>e.g.</i>, "jpg" or "tiff").
*
* @return an <code>Iterator</code> containing
* <code>ImageReader</code>s.
*
* @exception IllegalArgumentException if <code>fileSuffix</code>
* is <code>null</code>.
*
* @see javax.imageio.spi.ImageReaderSpi#getFileSuffixes
*/
public static Iterator<ImageReader>
getImageReadersBySuffix(String fileSuffix)
{
if (fileSuffix == null) {
throw new IllegalArgumentException("fileSuffix == null!");
}
// Ensure category is present
Iterator iter;
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerFileSuffixesMethod,
fileSuffix),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
getImageReadersByFormatName(String formatName)
{
if (formatName == null) {
throw new IllegalArgumentException("formatName == null!");
}
Iterator iter;
// Ensure category is present
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerFormatNamesMethod,
formatName),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
/**
* Returns an {@code Iterator} containing all currently
* registered {@code ImageTranscoder}s that claim to be
* able to transcode between the metadata of the given
* {@code ImageReader} and {@code ImageWriter}.
*
* @param reader an {@code ImageReader}.
* @param writer an {@code ImageWriter}.
*
* @return an {@code Iterator} containing
* {@code ImageTranscoder}s.
*
* @exception IllegalArgumentException if {@code reader} or
* {@code writer} is {@code null}.
*/
public static Iterator<ImageTranscoder>
getImageTranscoders(ImageReader reader, ImageWriter writer)
{
if (reader == null) {
throw new IllegalArgumentException("reader == null!");
}
if (writer == null) {
throw new IllegalArgumentException("writer == null!");
}
ImageReaderSpi readerSpi = reader.getOriginatingProvider();
ImageWriterSpi writerSpi = writer.getOriginatingProvider();
ServiceRegistry.Filter filter =
new TranscoderFilter(readerSpi, writerSpi);
Iterator<ImageTranscoderSpi> iter;
// Ensure category is present
try {
iter = theRegistry.getServiceProviders(ImageTranscoderSpi.class,
filter, true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageTranscoderIterator(iter);
}
/**
* Returns an <code>Iterator</code> containing all currently
* registered <code>ImageTranscoder</code>s that claim to be
* able to transcode between the metadata of the given
* <code>ImageReader</code> and <code>ImageWriter</code>.
*
* @param reader an <code>ImageReader</code>.
* @param writer an <code>ImageWriter</code>.
*
* @return an <code>Iterator</code> containing
* <code>ImageTranscoder</code>s.
*
* @exception IllegalArgumentException if <code>reader</code> or
* <code>writer</code> is <code>null</code>.
*/
public static Iterator<ImageTranscoder>
getImageTranscoders(ImageReader reader, ImageWriter writer)
{
if (reader == null) {
throw new IllegalArgumentException("reader == null!");
}
if (writer == null) {
throw new IllegalArgumentException("writer == null!");
}
ImageReaderSpi readerSpi = reader.getOriginatingProvider();
ImageWriterSpi writerSpi = writer.getOriginatingProvider();
ServiceRegistry.Filter filter =
new TranscoderFilter(readerSpi, writerSpi);
Iterator iter;
// Ensure category is present
try {
iter = theRegistry.getServiceProviders(ImageTranscoderSpi.class,
filter, true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageTranscoderIterator(iter);
}
/**
* Returns an <code>Iterator</code> containing all currently
* registered <code>ImageReader</code>s that claim to be able to
* decode files with the given MIME type.
*
* @param MIMEType a <code>String</code> containing a file
* suffix (<i>e.g.</i>, "image/jpeg" or "image/x-bmp").
*
* @return an <code>Iterator</code> containing
* <code>ImageReader</code>s.
*
* @exception IllegalArgumentException if <code>MIMEType</code> is
* <code>null</code>.
*
* @see javax.imageio.spi.ImageReaderSpi#getMIMETypes
*/
public static Iterator<ImageReader>
getImageReadersByMIMEType(String MIMEType)
{
if (MIMEType == null) {
throw new IllegalArgumentException("MIMEType == null!");
}
// Ensure category is present
Iterator iter;
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerMIMETypesMethod,
MIMEType),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
/**
* Returns an {@code Iterator} containing all currently
* registered {@code ImageReader}s that claim to be able to
* decode files with the given suffix.
*
* @param fileSuffix a {@code String} containing a file
* suffix (<i>e.g.</i>, "jpg" or "tiff").
*
* @return an {@code Iterator} containing
* {@code ImageReader}s.
*
* @exception IllegalArgumentException if {@code fileSuffix}
* is {@code null}.
*
* @see javax.imageio.spi.ImageReaderSpi#getFileSuffixes
*/
public static Iterator<ImageReader>
getImageReadersBySuffix(String fileSuffix)
{
if (fileSuffix == null) {
throw new IllegalArgumentException("fileSuffix == null!");
}
// Ensure category is present
Iterator<ImageReaderSpi> iter;
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerFileSuffixesMethod,
fileSuffix),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
/**
* Returns an <code>Iterator</code> containing all currently
* registered <code>ImageReader</code>s that claim to be able to
* decode files with the given suffix.
*
* @param fileSuffix a <code>String</code> containing a file
* suffix (<i>e.g.</i>, "jpg" or "tiff").
*
* @return an <code>Iterator</code> containing
* <code>ImageReader</code>s.
*
* @exception IllegalArgumentException if <code>fileSuffix</code>
* is <code>null</code>.
*
* @see javax.imageio.spi.ImageReaderSpi#getFileSuffixes
*/
public static Iterator<ImageReader>
getImageReadersBySuffix(String fileSuffix)
{
if (fileSuffix == null) {
throw new IllegalArgumentException("fileSuffix == null!");
}
// Ensure category is present
Iterator iter;
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerFileSuffixesMethod,
fileSuffix),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
/**
* Returns an <code>Iterator</code> containing all currently
* registered <code>ImageReader</code>s that claim to be able to
* decode files with the given MIME type.
*
* @param MIMEType a <code>String</code> containing a file
* suffix (<i>e.g.</i>, "image/jpeg" or "image/x-bmp").
*
* @return an <code>Iterator</code> containing
* <code>ImageReader</code>s.
*
* @exception IllegalArgumentException if <code>MIMEType</code> is
* <code>null</code>.
*
* @see javax.imageio.spi.ImageReaderSpi#getMIMETypes
*/
public static Iterator<ImageReader>
getImageReadersByMIMEType(String MIMEType)
{
if (MIMEType == null) {
throw new IllegalArgumentException("MIMEType == null!");
}
// Ensure category is present
Iterator iter;
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerMIMETypesMethod,
MIMEType),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
/**
* Returns an <code>Iterator</code> containing all currently
* registered <code>ImageReader</code>s that claim to be able to
* decode files with the given MIME type.
*
* @param MIMEType a <code>String</code> containing a file
* suffix (<i>e.g.</i>, "image/jpeg" or "image/x-bmp").
*
* @return an <code>Iterator</code> containing
* <code>ImageReader</code>s.
*
* @exception IllegalArgumentException if <code>MIMEType</code> is
* <code>null</code>.
*
* @see javax.imageio.spi.ImageReaderSpi#getMIMETypes
*/
public static Iterator<ImageReader>
getImageReadersByMIMEType(String MIMEType)
{
if (MIMEType == null) {
throw new IllegalArgumentException("MIMEType == null!");
}
// Ensure category is present
Iterator iter;
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerMIMETypesMethod,
MIMEType),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
getImageReadersByFormatName(String formatName)
{
if (formatName == null) {
throw new IllegalArgumentException("formatName == null!");
}
Iterator iter;
// Ensure category is present
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerFormatNamesMethod,
formatName),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
getImageReadersByFormatName(String formatName)
{
if (formatName == null) {
throw new IllegalArgumentException("formatName == null!");
}
Iterator iter;
// Ensure category is present
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerFormatNamesMethod,
formatName),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
getImageReadersByFormatName(String formatName)
{
if (formatName == null) {
throw new IllegalArgumentException("formatName == null!");
}
Iterator iter;
// Ensure category is present
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerFormatNamesMethod,
formatName),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
public void doTest(ImageReaderSpi spi) throws IOException {
System.out.println("Test for " + title +
(canDecode ? " (can decode)" : " (can't decode)"));
System.out.print("As a stream...");
ImageInputStream iis =
ImageIO.createImageInputStream(getDataStream());
if (spi.canDecodeInput(iis) != canDecode) {
throw new RuntimeException("Test failed: wrong decideion " +
"for stream data");
}
System.out.println("OK");
System.out.print("As a file...");
iis = ImageIO.createImageInputStream(getDataFile());
if (spi.canDecodeInput(iis) != canDecode) {
throw new RuntimeException("Test failed: wrong decideion " +
"for file data");
}
System.out.println("OK");
}
/**
* Returns an <code>Iterator</code> containing all currently
* registered <code>ImageTranscoder</code>s that claim to be
* able to transcode between the metadata of the given
* <code>ImageReader</code> and <code>ImageWriter</code>.
*
* @param reader an <code>ImageReader</code>.
* @param writer an <code>ImageWriter</code>.
*
* @return an <code>Iterator</code> containing
* <code>ImageTranscoder</code>s.
*
* @exception IllegalArgumentException if <code>reader</code> or
* <code>writer</code> is <code>null</code>.
*/
public static Iterator<ImageTranscoder>
getImageTranscoders(ImageReader reader, ImageWriter writer)
{
if (reader == null) {
throw new IllegalArgumentException("reader == null!");
}
if (writer == null) {
throw new IllegalArgumentException("writer == null!");
}
ImageReaderSpi readerSpi = reader.getOriginatingProvider();
ImageWriterSpi writerSpi = writer.getOriginatingProvider();
ServiceRegistry.Filter filter =
new TranscoderFilter(readerSpi, writerSpi);
Iterator iter;
// Ensure category is present
try {
iter = theRegistry.getServiceProviders(ImageTranscoderSpi.class,
filter, true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageTranscoderIterator(iter);
}
/**
* Returns an <code>Iterator</code> containing all currently
* registered <code>ImageReader</code>s that claim to be able to
* decode files with the given suffix.
*
* @param fileSuffix a <code>String</code> containing a file
* suffix (<i>e.g.</i>, "jpg" or "tiff").
*
* @return an <code>Iterator</code> containing
* <code>ImageReader</code>s.
*
* @exception IllegalArgumentException if <code>fileSuffix</code>
* is <code>null</code>.
*
* @see javax.imageio.spi.ImageReaderSpi#getFileSuffixes
*/
public static Iterator<ImageReader>
getImageReadersBySuffix(String fileSuffix)
{
if (fileSuffix == null) {
throw new IllegalArgumentException("fileSuffix == null!");
}
// Ensure category is present
Iterator iter;
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerFileSuffixesMethod,
fileSuffix),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
public void doTest(ImageReaderSpi spi) throws IOException {
System.out.println("Test for " + title +
(canDecode ? " (can decode)" : " (can't decode)"));
System.out.print("As a stream...");
ImageInputStream iis =
ImageIO.createImageInputStream(getDataStream());
if (spi.canDecodeInput(iis) != canDecode) {
throw new RuntimeException("Test failed: wrong decideion " +
"for stream data");
}
System.out.println("OK");
System.out.print("As a file...");
iis = ImageIO.createImageInputStream(getDataFile());
if (spi.canDecodeInput(iis) != canDecode) {
throw new RuntimeException("Test failed: wrong decideion " +
"for file data");
}
System.out.println("OK");
}
/**
* Returns an <code>Iterator</code> containing all currently
* registered <code>ImageReader</code>s that claim to be able to
* decode files with the given suffix.
*
* @param fileSuffix a <code>String</code> containing a file
* suffix (<i>e.g.</i>, "jpg" or "tiff").
*
* @return an <code>Iterator</code> containing
* <code>ImageReader</code>s.
*
* @exception IllegalArgumentException if <code>fileSuffix</code>
* is <code>null</code>.
*
* @see javax.imageio.spi.ImageReaderSpi#getFileSuffixes
*/
public static Iterator<ImageReader>
getImageReadersBySuffix(String fileSuffix)
{
if (fileSuffix == null) {
throw new IllegalArgumentException("fileSuffix == null!");
}
// Ensure category is present
Iterator iter;
try {
iter = theRegistry.getServiceProviders(ImageReaderSpi.class,
new ContainsFilter(readerFileSuffixesMethod,
fileSuffix),
true);
} catch (IllegalArgumentException e) {
return Collections.emptyIterator();
}
return new ImageReaderIterator(iter);
}
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(String[] args) {
IOException expectedException = null;
TestStream iis = new TestStream();
ImageReader wbmp = ImageIO.getImageReadersByFormatName("WBMP").next();
if (wbmp == null) {
System.out.println("No WBMP reader: skip the test");
return;
}
ImageReaderSpi spi = wbmp.getOriginatingProvider();
iis.checkPosition();
try {
spi.canDecodeInput(iis);
} catch (IOException e) {
expectedException = e;
}
if (expectedException == null) {
throw new RuntimeException("Test FAILED: stream was not used");
}
iis.checkPosition();
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(String[] args) throws IOException {
ImageReader r =
ImageIO.getImageReadersByFormatName("WBMP").next();
ImageReaderSpi spi = r.getOriginatingProvider();
Vector<TestCase> tests = getTestCases();
for (TestCase t : tests) {
t.doTest(spi);
}
System.out.println("Test passed.");
}
private ImageReaderSpi constructImageReaderSpi() {
return new ImageReaderSpi(vendorName,
version,
names,
suffixes,
MIMETypes,
readerClassName,
inputTypes,
writerSpiNames,
false,
nativeStreamMetadataFormatName,
nativeStreamMetadataFormatClassName,
extraStreamMetadataFormatNames,
extraStreamMetadataFormatClassNames,
false,
nativeImageMetadataFormatName,
nativeImageMetadataFormatClassName,
extraImageMetadataFormatNames,
extraImageMetadataFormatClassNames) {
public String getDescription(Locale locale) {
return null;
}
public boolean canDecodeInput(Object source) {
return false;
}
public ImageReader createReaderInstance(Object extension) {
return null;
}
};
}
public static void main(String[] args) {
IOException expectedException = null;
TestStream iis = new TestStream();
ImageReader wbmp = ImageIO.getImageReadersByFormatName("WBMP").next();
if (wbmp == null) {
System.out.println("No WBMP reader: skip the test");
return;
}
ImageReaderSpi spi = wbmp.getOriginatingProvider();
iis.checkPosition();
try {
spi.canDecodeInput(iis);
} catch (IOException e) {
expectedException = e;
}
if (expectedException == null) {
throw new RuntimeException("Test FAILED: stream was not used");
}
iis.checkPosition();
System.out.println("Test PASSED");
}
public static void main(String[] args) {
fmts = new Hashtable();
fmts.put("javax_imageio_jpeg_stream_1.0", Boolean.FALSE);
fmts.put("javax_imageio_jpeg_image_1.0", Boolean.FALSE);
fmts.put("javax_imageio_png_1.0", Boolean.FALSE);
fmts.put("javax_imageio_bmp_1.0", Boolean.FALSE);
fmts.put("javax_imageio_wbmp_1.0", Boolean.FALSE);
fmts.put("javax_imageio_gif_stream_1.0", Boolean.FALSE);
fmts.put("javax_imageio_gif_image_1.0", Boolean.FALSE);
IIORegistry registry = IIORegistry.getDefaultInstance();
Iterator iter = registry.getServiceProviders(ImageReaderSpi.class,
false);
while(iter.hasNext()) {
ImageReaderSpi spi = (ImageReaderSpi)iter.next();
String fmt_name;
fmt_name = spi.getNativeStreamMetadataFormatName();
testStreamMetadataFormat(spi, fmt_name);
fmt_name = spi.getNativeImageMetadataFormatName();
testImageMetadataFormat(spi, fmt_name);
String[] fmt_names;
fmt_names = spi.getExtraStreamMetadataFormatNames();
for (int i=0; fmt_names != null && i < fmt_names.length; i++) {
testStreamMetadataFormat(spi, fmt_names[i]);
}
fmt_names = spi.getExtraImageMetadataFormatNames();
for (int i=0; fmt_names != null && i < fmt_names.length; i++) {
testImageMetadataFormat(spi, fmt_names[i]);
}
}
Enumeration keys = fmts.keys();
while (keys.hasMoreElements()) {
String key = (String)keys.nextElement();
boolean val = ((Boolean)fmts.get(key)).booleanValue();
if (!val) {
throw new RuntimeException("Test failed: format " +
key + "is not registered.");
}
}
}
/** Constructs <code>WBMPImageReader</code> from the provided
* <code>ImageReaderSpi</code>.
*/
public WBMPImageReader(ImageReaderSpi originator) {
super(originator);
}
/** Constructs <code>BMPImageReader</code> from the provided
* <code>ImageReaderSpi</code>.
*/
public BMPImageReader(ImageReaderSpi originator) {
super(originator);
}
public PNGImageReader(ImageReaderSpi originatingProvider) {
super(originatingProvider);
}
/** Constructs {@code BMPImageReader} from the provided
* {@code ImageReaderSpi}.
*/
public BMPImageReader(ImageReaderSpi originator) {
super(originator);
}
public TestImageReader(ImageReaderSpi originatingProvider) {
super(originatingProvider);
}
Context(TestEnvironment env, Result result, int testType) {
super(env, result);
String content = (String)env.getModifier(contentList);
if (content == null) {
content = CONTENT_BLANK;
}
// REMIND: add option for non-opaque images
image = createBufferedImage(size, size, content, false);
result.setUnits(size*size);
result.setUnitName("pixel");
if (testType == TEST_IMAGEIO || testType == TEST_IMAGEREADER) {
ImageReaderSpi readerspi =
(ImageReaderSpi)env.getModifier(imageioReadFormatList);
format = readerspi.getFileSuffixes()[0].toLowerCase();
if (testType == TEST_IMAGEREADER) {
seekForwardOnly = env.isEnabled(seekForwardOnlyTog);
ignoreMetadata = env.isEnabled(ignoreMetadataTog);
try {
reader = readerspi.createReaderInstance();
} catch (IOException e) {
System.err.println("error creating reader");
e.printStackTrace();
}
if (env.isEnabled(installListenerTog)) {
reader.addIIOReadProgressListener(
new ReadProgressListener());
}
}
if (format.equals("wbmp")) {
// REMIND: this is a hack to create an image that the
// WBMPImageWriter can handle (a better approach
// would involve checking the ImageTypeSpecifier
// of the writer's default image param)
BufferedImage newimg =
new BufferedImage(size, size,
BufferedImage.TYPE_BYTE_BINARY);
Graphics g = newimg.createGraphics();
g.drawImage(image, 0, 0, null);
g.dispose();
image = newimg;
}
} else if (testType == TEST_TOOLKIT) {
format = (String)env.getModifier(toolkitReadFormatList);
} else { // testType == TEST_JPEGCODEC
format = "jpeg";
}
initInput();
}