Class ImageWriter 

java.lang.Object
   |
   +----java.lang.Thread
           |
           +----ImageWriter
public class ImageWriter
extends Thread
Class definition for an object that writes an image as a GIF or JPEG file.

Version:
$Revision: 1.5 $, $Date: 2000/10/12 14:07:51 $
Author:
John Cavanaugh

Variable Index

o cancelled
A flag indicating whether the write has been cancelled.
o eof
A flag indicating whether the write process has reached end of file.
o fatalErrList
A list of fatal errors that have been encountered.
o GIF_IMAGE
o gifEncoder
The GIF encoder object.
o image
The image to be written.
o JPEG_IMAGE
o jpegEncoder
The JPEG encoder object.
o outStream
The output stream to write the image to.
o type
The type of output to write (GIF or JPEG);

Constructor Index

o ImageWriter(FileOutputStream, Image, int)
Constructs an ImageWriter object.

Method Index

o cancel()
Cancel the operation.
o getEOF()
Get the completion status.
o getFatalErrors()
Return a list of fatal errors encountered.
o getWarnings()
Return a list of the warnings encountered.
o isCancelled()
Get the cancel flag.
o run()
Main line code.

Variables

o outStream 
 private FileOutputStream outStream
The output stream to write the image to.

o image 
 private Image image
The image to be written.

o type 
 private int type
The type of output to write (GIF or JPEG);

o JPEG_IMAGE 
 public static final int JPEG_IMAGE
o GIF_IMAGE 
 public static final int GIF_IMAGE
o gifEncoder 
 private GifEncoder gifEncoder
The GIF encoder object.

o jpegEncoder 
 private JpegEncoder jpegEncoder
The JPEG encoder object.

o cancelled 
 private Boolean cancelled
A flag indicating whether the write has been cancelled.

o eof 
 private boolean eof
A flag indicating whether the write process has reached end of file.

o fatalErrList 
 private Vector fatalErrList
A list of fatal errors that have been encountered.

Constructors

o ImageWriter 
 public ImageWriter(FileOutputStream outStream,
                    Image image,
                    int type) throws IOException
Constructs an ImageWriter object.

Parameters:
outStream - The output stream to write the image to.
image - The image to write.
type - The type of image to be written (GIF or JPEG).

Methods

o run 
 public void run()
Main line code.

Overrides:
run in class Thread
o cancel 
 public void cancel()
Cancel the operation.

o isCancelled 
 public boolean isCancelled()
Get the cancel flag.

Returns:
True if the operation has been cancelled; false otherwise.
o getEOF 
 public boolean getEOF()
Get the completion status.

Returns:
True if the writer has reached EOF or been cancelled; false otherwise.
o getFatalErrors 
 public Vector getFatalErrors()
Return a list of fatal errors encountered.

Returns:
A Vector of error messages.
o getWarnings 
 public Vector getWarnings()
Return a list of the warnings encountered.

Returns:
Always returns null.