javax.imageio.ImageReader#getOriginatingProvider ( )源码实例Demo

/**
 * 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 new HashSet().iterator();
	}
	return new ImageTranscoderIterator(iter);
}
 

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) 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.");
}
 

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) {
    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) 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.");
}
 

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.");
}
 

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) 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.");
}
 

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) {
    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) 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.");
}
 

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) {
    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) 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.");
}
 

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) 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.");
}
 

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.");
}
 

public static void testFormat(String format) {
    ImageReader reader =
        ImageIO.getImageReadersByFormatName(format).next();
    if (reader == null) {
        throw new RuntimeException("Failed to get reader for " + format);
    }

    ImageReaderSpi readerSpi = reader.getOriginatingProvider();
    System.out.println(format + " Reader SPI: " + readerSpi);

    String writerSpiNames[] = readerSpi.getImageWriterSpiNames();
    if (writerSpiNames == null || writerSpiNames.length == 0) {
        throw new RuntimeException("Failed to get writer spi names for " +
                                   format);
    }

    System.out.println("Available writer spi names:");
    for (int i = 0; i < writerSpiNames.length; i++) {
        System.out.println(writerSpiNames[i]);
        try {
            Class spiClass = Class.forName(writerSpiNames[i]);
            if (spiClass == null) {
                throw new RuntimeException("Failed to get spi class " +
                                           writerSpiNames[i]);
            }
            System.out.println("Got class " + spiClass.getName());

            Object spiObject = spiClass.newInstance();
            if (spiObject == null) {
                throw new RuntimeException("Failed to instantiate spi " +
                                           writerSpiNames[i]);
            }
            System.out.println("Got instance " + spiObject);
        } catch (Throwable e) {
            throw new RuntimeException("Failed to test spi " +
                                       writerSpiNames[i]);
        }
    }

    ImageWriter writer = ImageIO.getImageWriter(reader);
    if (writer == null) {
        throw new RuntimeException("Failed to get writer for " + format);
    }
}
 

public static void testFormat(String format) {
    ImageReader reader =
        ImageIO.getImageReadersByFormatName(format).next();
    if (reader == null) {
        throw new RuntimeException("Failed to get reader for " + format);
    }

    ImageReaderSpi readerSpi = reader.getOriginatingProvider();
    System.out.println(format + " Reader SPI: " + readerSpi);

    String writerSpiNames[] = readerSpi.getImageWriterSpiNames();
    if (writerSpiNames == null || writerSpiNames.length == 0) {
        throw new RuntimeException("Failed to get writer spi names for " +
                                   format);
    }

    System.out.println("Available writer spi names:");
    for (int i = 0; i < writerSpiNames.length; i++) {
        System.out.println(writerSpiNames[i]);
        try {
            Class spiClass = Class.forName(writerSpiNames[i]);
            if (spiClass == null) {
                throw new RuntimeException("Failed to get spi class " +
                                           writerSpiNames[i]);
            }
            System.out.println("Got class " + spiClass.getName());

            Object spiObject = spiClass.newInstance();
            if (spiObject == null) {
                throw new RuntimeException("Failed to instantiate spi " +
                                           writerSpiNames[i]);
            }
            System.out.println("Got instance " + spiObject);
        } catch (Throwable e) {
            throw new RuntimeException("Failed to test spi " +
                                       writerSpiNames[i]);
        }
    }

    ImageWriter writer = ImageIO.getImageWriter(reader);
    if (writer == null) {
        throw new RuntimeException("Failed to get writer for " + format);
    }
}