sun.awt.image
Class ImageDecoderFactory

java.lang.Object
  sun.awt.image.ImageDecoderFactory

public class ImageDecoderFactory
extends Object

ImageDecoderFactory allows the peer implementations to provide alternative image decoder implementations that can be used image decoding framework. There is always a default instance created that uses the decoders that are part of the sun.awt.image package.

sun.awt.image.InputStreamImageSource.getDecoder() method gets the instance of ImageDecoderFactory using ImageDecoderFactory.getInstance() and uses the factory to create various decoders.

Plugging Alternative Factories

The peer implementation can provide alternate implementations for the image decoders. To do that they need to do the following

• Subclass sun.awt.image.ImageDecoderFactory and provide implementation for ImageDecoderFactory.newImageDecoder()
• Create an instance of the subclass and register it with sun.awt.image.ImageDecoderFactory.setFactory()

Field Summary

static String	IMG_FORMAT_GIF GIF Image format
static String	IMG_FORMAT_JPG JPEG Image format
static String	IMG_FORMAT_PNG PNG Image format
static String	IMG_FORMAT_XBM XBM Image format

Constructor Summary

ImageDecoderFactory()

Method Summary

static ImageDecoderFactory	getInstance() Returns the ImageDecoderFactory instance.
ImageDecoder	newImageDecoder(InputStreamImageSource source, InputStream input, String imgFormat) Creates an instance of a new ImageDecoder for the image format specified.
static void	setFactory(ImageDecoderFactory factory) Sets the ImageDecoderFactory instance.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

IMG_FORMAT_GIF

public static final String IMG_FORMAT_GIF

GIF Image format

See Also:

Constant Field Values

IMG_FORMAT_JPG

public static final String IMG_FORMAT_JPG

JPEG Image format

See Also:

Constant Field Values

IMG_FORMAT_PNG

public static final String IMG_FORMAT_PNG

PNG Image format

See Also:

Constant Field Values

IMG_FORMAT_XBM

public static final String IMG_FORMAT_XBM

XBM Image format

See Also:

Constant Field Values

Constructor Detail

ImageDecoderFactory

public ImageDecoderFactory()

Method Detail

getInstance

public static ImageDecoderFactory getInstance()

Returns the ImageDecoderFactory instance.

setFactory

public static void setFactory(ImageDecoderFactory factory)

Sets the ImageDecoderFactory instance. This can be called by the peer implementation to change the decoder factory

newImageDecoder

public ImageDecoder newImageDecoder(InputStreamImageSource source,
                                    InputStream input,
                                    String imgFormat)
                             throws IOException

Creates an instance of a new ImageDecoder for the image format specified.

Throws:

IOException