net.coobird.thumbnailator.tasks
Class StreamThumbnailTask

java.lang.Object
  net.coobird.thumbnailator.tasks.ThumbnailTask<InputStream,OutputStream>
      net.coobird.thumbnailator.tasks.StreamThumbnailTask

public class StreamThumbnailTask
extends ThumbnailTask<InputStream,OutputStream>

A thumbnail generation task which streams data from an InputStream to an OutputStream.

This class does not close the InputStream and OutputStream upon the completion of processing.

Only the first image obtained from the data stream will be read. Subsequent images will be ignored.

Author:

coobird

Constructor Summary

StreamThumbnailTask(ThumbnailParameter param, InputStream is, OutputStream os)
Creates a ThumbnailTask in which streamed image data from the specified InputStream is output to a specified OutputStream, using the parameters provided in the specified ThumbnailParameter.

Method Summary

OutputStream	getDestination() Returns the destination to which the thumbnail is stored or written.
ThumbnailParameter	getParam() Returns the ThumbnailParameter for this ThumbnailTask, used when performing a thumbnail generation operation.
InputStream	getSource() Returns the source from which the source image is retrieved or read.
BufferedImage	read() Reads a source image.
void	write(BufferedImage img) Writes the thumbnail to the destination.

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamThumbnailTask

public StreamThumbnailTask(ThumbnailParameter param,
                           InputStream is,
                           OutputStream os)

Creates a ThumbnailTask in which streamed image data from the specified InputStream is output to a specified OutputStream, using the parameters provided in the specified ThumbnailParameter.

Parameters:

param - The parameters to use to create the thumbnail.

is - The InputStream from which to obtain image data.

os - The OutputStream to send thumbnail data to.

Throws:

NullPointerException - If the parameter is null.

Method Detail

read

public BufferedImage read()
                   throws IOException

Description copied from class: ThumbnailTask

Reads a source image.

Specified by:

read in class ThumbnailTask<InputStream,OutputStream>

Returns:

The image which was obtained from the source.

Throws:

IOException - Thrown when an I/O problem occurs when reading from the image source.

write

public void write(BufferedImage img)
           throws IOException

Description copied from class: ThumbnailTask

Writes the thumbnail to the destination.

Specified by:

write in class ThumbnailTask<InputStream,OutputStream>

Parameters:

img - The image to write.

Throws:

UnsupportedFormatException - When an image file which is to be read or written is unsupported.

IOException - Thrown when an I/O problem occurs when writing the image.

getParam

public ThumbnailParameter getParam()

Description copied from class: ThumbnailTask

Returns the ThumbnailParameter for this ThumbnailTask, used when performing a thumbnail generation operation.

Overrides:

getParam in class ThumbnailTask<InputStream,OutputStream>

Returns:

The parameters to use when generating thumbnails.

getSource

public InputStream getSource()

Description copied from class: ThumbnailTask

Returns the source from which the source image is retrieved or read.

Specified by:

getSource in class ThumbnailTask<InputStream,OutputStream>

Returns:

The source.

getDestination

public OutputStream getDestination()

Description copied from class: ThumbnailTask

Returns the destination to which the thumbnail is stored or written.

Specified by:

getDestination in class ThumbnailTask<InputStream,OutputStream>

Returns:

The destination.