Package de.xima.fc.form.image

Class PreviewImageProcessor

java.lang.Object

de.xima.fc.form.image.PreviewImageProcessor

public class PreviewImageProcessor
extends Object

Constructor Summary

Constructors

Constructor	Description
PreviewImageProcessor()

Method Summary

Modifier and Type	Method	Description
static byte[]	findImage(ImageRequestParameter params)	Finds the appropriate preview image for the given image request parameters.
static byte[]	findImageIfChanged(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp, ImageRequestParameter params)	Finds the appropriate preview image for the given image request parameters.
static void	writeDefaultImage(javax.servlet.http.HttpServletResponse resp, ImageRequestParameter params)	Writes the default preview image to the response.
static void	writeImage(javax.servlet.http.HttpServletResponse resp, ImageRequestParameter params, byte[] scrFile)	Writes the given image to the response.

Methods inherited from class java.lang.Object

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

Constructor Detail

PreviewImageProcessor

public PreviewImageProcessor()

Method Detail

findImage

public static byte[] findImage(ImageRequestParameter params)

Finds the appropriate preview image for the given image request parameters.

Parameters:

params - Parameters for the image request.

Returns:

The preview image for the given request parameters.

findImageIfChanged

public static byte[] findImageIfChanged(javax.servlet.http.HttpServletRequest req,
                                        javax.servlet.http.HttpServletResponse resp,
                                        ImageRequestParameter params)

Finds the appropriate preview image for the given image request parameters.

Parameters:

params - Parameters for the image request.

Returns:

The preview image for the given request parameters. An empty byte array if the preview image is unchanged.

writeImage

public static void writeImage(javax.servlet.http.HttpServletResponse resp,
                              ImageRequestParameter params,
                              byte[] scrFile)
                       throws IOException

Writes the given image to the response. Takes care of settings the appropriate content type. The format may be determined by the ImageRequestParameters.

Parameters:

resp - Response to write to.

params - Parameters for the image request.

scrFile - Source file with the image data.

Throws:

IOException - on errors while writing the image to re response

writeDefaultImage

public static void writeDefaultImage(javax.servlet.http.HttpServletResponse resp,
                                     ImageRequestParameter params)
                              throws IOException

Writes the default preview image to the response. Takes care of settings the appropriate content type. The format may be determined by the ImageRequestParameters.

Parameters:

resp - Response to write to.

params - Parameters for the image request.

Throws:

IOException - on errors while writing the image to re response