# javax.imageio.spi

***

1. **Create a custom image reader:**

```java
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;
import java.io.IOException;
import java.util.Collections;

public class CustomImageReaderSpi extends ImageReaderSpi {

    public CustomImageReaderSpi() {
        super("My Custom Image Reader", Collections.singleton("myimage"), null, false, null, null, null, null, false, null, null, null, null);
    }

    @Override
    public ImageReader createReaderInstance(Object extension) {
        return new ImageReader(this);
    }

    private class ImageReader implements javax.imageio.ImageReader {

        private ImageReaderSpi spi;

        public ImageReader(ImageReaderSpi spi) {
            this.spi = spi;
        }

        @Override
        public Object getProperty(String name) {
            return null;
        }

        @Override
        public void setProperty(String name, Object value) {

        }

        @Override
        public String[] getFormatNames() {
            return spi.getFormatNames();
        }

        @Override
        public String[] getMIMETypes() {
            return spi.getMIMETypes();
        }

        @Override
        public String[] getSuffixes() {
            return spi.getSuffixes();
        }

        @Override
        public boolean canReadRaster() {
            return false;
        }

        @Override
        public int getNumImages(boolean allowSearch) throws IOException {
            return 0;
        }

        @Override
        public int getWidth(int imageIndex) throws IOException {
            return 0;
        }

        @Override
        public int getHeight(int imageIndex) throws IOException {
            return 0;
        }

        @Override
        public boolean isImageComplete(int imageIndex) throws IOException {
            return false;
        }

        @Override
        public ColorModel getColorModel() {
            return null;
        }

        @Override
        public SampleModel getSampleModel(int imageIndex) {
            return null;
        }

        @Override
        public Raster readRaster(int imageIndex, Raster dest) throws IOException {
            return null;
        }

        @Override
        public void read(int[] subimageIndex, ImageReadParam param) throws IOException {

        }

        @Override
        public Object readAsRaster(int imageIndex, ImageReadParam param) throws IOException {
            return null;
        }

        @Override
        public BufferedImage read(int imageIndex, ImageReadParam param) throws IOException {
            return null;
        }

        @Override
        public ImageInputStream getStream() {
            return null;
        }

        @Override
        public void setStream(ImageInputStream stream) {

        }

        @Override
        public void reset() {

        }

        @Override
        public void dispose() {

        }
    }
}
```

2. **Create a custom image writer:**

```java
import javax.imageio.spi.ImageWriterSpi;
import javax.imageio.stream.ImageOutputStream;

public class CustomImageWriterSpi extends ImageWriterSpi {

    public CustomImageWriterSpi() {
        super("My Custom Image Writer", Collections.singleton("myimage"), null, false, null, null, null, null, false, null, null, null, null);
    }

    @Override
    public ImageWriter createWriterInstance(Object extension) {
        return new ImageWriter(this);
    }

    private class ImageWriter implements javax.imageio.ImageWriter {

        private ImageWriterSpi spi;

        public ImageWriter(ImageWriterSpi spi) {
            this.spi = spi;
        }

        @Override
        public Object getProperty(String name) {
            return null;
        }

        @Override
        public void setProperty(String name, Object value) {

        }

        @Override
        public String[] getFormatNames() {
            return spi.getFormatNames();
        }

        @Override
        public String[] getMIMETypes() {
            return spi.getMIMETypes();
        }

        @Override
        public String[] getSuffixes() {
            return spi.getSuffixes();
        }

        @Override
        public boolean canWriteRaster() {
            return false;
        }

        @Override
        public int getNumWriteableRasterFormats() {
            return 0;
        }

        @Override
        public RasterFormat getWriteableRasterFormat(int imageIndex) {
            return null;
        }

        @Override
        public IIOMetadata convertImageMetadata(IIOMetadata inData, ImageTypeSpecifier imageType, ImageWriteParam param) {
            return null;
        }

        @Override
        public IIOMetadata convertImageMetadata(IIOMetadata inData, ImageWriteParam param) {
            return null;
        }

        @Override
        public ImageWriteParam getDefaultWriteParam() {
            return null;
        }

        @Override
        public void setOutput(ImageOutputStream stream) {

        }

        @Override
        public void write(RenderedImage image, ImageWriteParam param) throws IOException {

        }

        @Override
        public void reset() {

        }

        @Override
        public void dispose() {

        }

        @Override
        public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType, ImageWriteParam param) {
            return null;
        }
    }
}
```

3. **Create a custom image transcoder:**

```java
import javax.imageio.spi.ImageTranscoderSpi;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;

public class CustomImageTranscoderSpi extends ImageTranscoderSpi {

    public CustomImageTranscoderSpi() {
        super("My Custom Image Transcoder", Collections.singleton("myimage"), null, false, null, null, null, null, false, null, null, null, null);
    }

    @Override
    public ImageTranscoder createTranscoderInstance() {
        return new ImageTranscoder(this);
    }

    private class ImageTranscoder implements javax.imageio.ImageTranscoder {

        private ImageTranscoderSpi spi;

        public ImageTranscoder(ImageTranscoderSpi spi) {
            this.spi = spi;
        }

        @Override
        public Object getProperty(String name) {
            return null;
        }

        @Override
        public void setProperty(String name, Object value) {

        }

        @Override
        public String[] getFormatNames() {
            return spi.getFormatNames();
        }

        @Override
        public String[] getMIMETypes() {
            return spi.getMIMETypes();
        }

        @Override
        public String[] getSuffixes() {
            return spi.getSuffixes();
        }

        @Override
        public int getNumInputFormats() {
            return 0;
        }

        @Override
        public int getNumOutputFormats() {
            return 0;
        }

        @Override
        public int[] getTranscodingHints(int inputFormat, int outputFormat) {
            return new int[0];
        }

        @Override
        public boolean convertLossless(int inputFormat, int outputFormat) {
            return false;
        }

        @Override
        public ImageTranscoder createWriteTranscoder(int outputFormat) {
            return null;
        }

        @Override
        public ImageTranscoder createReadTranscoder(int inputFormat) {
            return null;
        }

        @Override
        public ImageTypeSpecifier getOutputImageTypeSpecifier(ImageTypeSpecifier inputType, int outputFormat, ImageWriteParam param) {
            return null;
        }

        @Override
        public void writeImage(BufferedImage src, ImageOutputStream out, ImageWriteParam param) throws IOException {

        }

        @Override
        public BufferedImage readImage(ImageInputStream in, ImageReadParam param) throws IOException {
            return null;
        }

        @Override
        public void initFromWriteParam(ImageWriteParam param) {

        }

        @Override
        public void initFromReadParam(ImageReadParam param) {

        }

        @Override
        public void reset() {

        }

        @Override
        public void dispose() {

        }


    }
}
```

4. **Get a list of all registered image readers:**

```java
import javax.imageio.ImageIO;
import javax.imageio.spi.ImageReaderSpi;

public class GetRegisteredImageReaders {

    public static void main(String[] args) {
        ImageReaderSpi[] readers = ImageIO.getImageReaders();
        for (ImageReaderSpi reader : readers) {
            System.out.println(reader.getDescription());
        }
    }
}
```

5. **Get a list of all registered image writers:**

```java
import javax.imageio.ImageIO;
import javax.imageio.spi.ImageWriterSpi;

public class GetRegisteredImageWriters {

    public static void main(String[] args) {
        ImageWriterSpi[] writers = ImageIO.getImageWriters();
        for (ImageWriterSpi writer : writers) {
            System.out.println(writer.getDescription());
        }
    }
}
```

6. **Get a list of all registered image transcoders:**

```java
import javax.imageio.ImageIO;
import javax.imageio.spi.ImageTranscoderSpi;

public class GetRegisteredImageTranscoders {

    public static void main(String[] args) {
        ImageTranscoderSpi[] transcoders = ImageIO.getImageTranscoders();
        for (ImageTranscoderSpi transcoder : transcoders) {
            System.out.println(transcoder.getDescription());
        }
    }
}
```

7. **Create a custom image service provider:**

```java
import javax.imageio.spi.IIOServiceProvider;

public class CustomImageServiceProvider implements IIOServiceProvider {

    @Override
    public Object getService(String category, String className, Class<?> spiClass) {
        if (category.equals("javax.imageio.ImageReader") && className.equals("my.custom.ImageReader")) {
            return new MyCustomImageReader();
        } else if (category.equals("javax.imageio.ImageWriter") && className.equals("my.custom.ImageWriter")) {
            return new MyCustomImageWriter();
        } else if (category.equals("javax.imageio.ImageTranscoder") && className.equals("my.custom.ImageTranscoder")) {
            return new MyCustomImageTranscoder();
        } else {
            return null;
        }
    }

    private class MyCustomImageReader extends javax.imageio.ImageReader {

        @Override
        public Object getProperty(String name) {
            return null;
        }

        @Override
        public void setProperty(String name, Object value) {

        }

        @Override
        public String[] getFormatNames() {
            return new String[] { "myimage" };
        }

        @Override
        public String[] getMIMETypes() {
            return new String[] { "image/myimage" };
        }

        @Override
        public String[] getSuffixes() {
            return new String[] { "my" };
        }

        @Override
        public boolean canReadRaster() {
            return false;
        }

        @Override
        public int getNumImages(boolean allowSearch) throws IOException {
            return 0;
        }

        @Override
        public int getWidth(int imageIndex) throws IOException {
            return 0;
        }

        @Override
        public int getHeight(int imageIndex) throws IOException {
            return 0;
        }

        @Override
        public boolean isImageComplete(int imageIndex) throws IOException {
            return false;
        }

        @Override
        public ColorModel getColorModel() {
            return null;
        }

        @Override
        public SampleModel getSampleModel(int imageIndex) {
            return null;
        }

        @Override
        public Raster readRaster(int imageIndex, Raster dest) throws IOException {
            return null;
        }

        @Override
        public void read(int[] subimageIndex, ImageReadParam param) throws IOException {

        }

        @Override
        public Object readAsRaster(int imageIndex, ImageReadParam param) throws IOException {
            return null;
        }

        @Override
        public BufferedImage read(int imageIndex, ImageReadParam param) throws IOException {
            return null;
        }

        @Override
        public ImageInputStream getStream() {
            return null;
        }

        @Override
        public void setStream(ImageInputStream stream) {

        }

        @Override
        public void reset() {

        }

        @Override
        public void dispose() {

        }
    }

    private class MyCustomImageWriter extends javax.imageio.ImageWriter {

        @Override
        public Object getProperty(String name) {
            return null;
        }

        @Override
        public void setProperty(String name, Object value) {

        }

        @Override
        public String[] getFormatNames() {
            return new String[] { "myimage" };
        }

        @Override
        public String[] getMIMETypes() {
            return new String[] { "image/myimage" };
        }

        @Override
        public String[] getSuffixes() {
            return new String[] { "my" };
        }

        @Override
        public boolean canWriteRaster() {
            return false;
        }

        @Override
        public int getNumWriteableRasterFormats() {
            return 0;
        }

        @Override
        public RasterFormat getWriteableRasterFormat(int imageIndex) {
            return null;
        }

        @Override
        public IIOMetadata convertImageMetadata(IIOMetadata inData, ImageTypeSpecifier imageType, ImageWriteParam param) {
            return null;
        }

        @Override
        public IIOMetadata convertImageMetadata(IIOMetadata inData, ImageWriteParam param) {
            return null;
        }

        @Override
        public ImageWriteParam getDefaultWriteParam() {
            return null;
        }

        @Override
        public void setOutput(ImageOutputStream stream) {

        }

        @Override
        public void write(RenderedImage image, ImageWriteParam param) throws IOException {

        }

        @Override
        public void reset() {

        }

        @Override
        public void dispose() {

        }

        @Override
        public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType, ImageWriteParam param) {
            return null;
        }
    }

    private class MyCustomImageTranscoder extends javax.imageio.ImageTranscoder {

        @Override
        public Object getProperty(String name) {
            return null;
        }

        @Override
        public void setProperty(String name, Object value) {

        }

        @Override
        public String[] getFormatNames() {
            return new String[] { "myimage" };
        }

        @Override
        public String[] getMIMET

```