org.foray.graphic.factory
Class JPEGFactory

java.lang.Object
  org.foray.graphic.factory.GraphicFactory
      org.foray.graphic.factory.JPEGFactory

public class JPEGFactory
extends GraphicFactory

ImageReader object for JPEG image type.

Version:

1.0

Author:

Pankaj Narula

Field Summary

protected static byte[]

JPEG_HEADER File header indicating that the file is a JPEG file.

Constructor Summary

JPEGFactory(GraphicServer4a server)
Constructor.

Method Summary

JPEGGraphic

attemptCreate(URL url, BufferedInputStream bis) Subclasses implement this method to try to create an appropriate Graphic instance.

Methods inherited from class org.foray.graphic.factory.GraphicFactory

getLogger, getServer, makeGraphic, maxBytesToVerify

Methods inherited from class java.lang.Object

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

Field Detail

JPEG_HEADER

protected static final byte[] JPEG_HEADER

File header indicating that the file is a JPEG file.

Constructor Detail

JPEGFactory

public JPEGFactory(GraphicServer4a server)

Constructor.

Parameters:

server - The parent graphic server.

Method Detail

attemptCreate

public JPEGGraphic attemptCreate(URL url,
                                 BufferedInputStream bis)
                          throws IOException

Description copied from class: GraphicFactory

Subclasses implement this method to try to create an appropriate Graphic instance. Note that this superclass handles the task of marking and resetting the input stream, so all the subclass needs to do is read the stream.

Specified by:

attemptCreate in class GraphicFactory

Parameters:

url - The URL which contains the graphic content.

bis - The reusable input stream containing the bytes from url.

Returns:

The newly-created Graphic instance, or null if this factory was unable to create such an instance.

Throws:

IOException - For IO errors.