utils
Class ImageTransform

java.lang.Object
  utils.ImageTransform

public class ImageTransform
extends java.lang.Object

utils for transformation image

Constructor Summary

ImageTransform()

Method Summary

static java.lang.String	cacheKey(java.lang.Long id, int width, int height) create key for cache
static byte[]	cropImage(byte[] image, java.lang.Integer width, java.lang.Integer height, java.lang.Boolean stretch, java.lang.String format) crop image
static byte[]	getImage(byte[] image, java.lang.Integer width, java.lang.Integer height, java.lang.String format, java.lang.Boolean stretch, java.lang.Boolean crop) transform image
static byte[]	joinImages(java.util.List<java.awt.Image> imageList, java.lang.Integer width, java.lang.Integer height, java.lang.String format) join images
static byte[]	thumb(java.lang.String url, int width, int height) create transformation image
static byte[]	thumb(java.lang.String url, int width, int height, java.lang.String format) create transformation image

Methods inherited from class java.lang.Object

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

Constructor Detail

ImageTransform

public ImageTransform()

Method Detail

cacheKey

public static java.lang.String cacheKey(java.lang.Long id,
                                        int width,
                                        int height)

create key for cache

Parameters:

id - id of image

width - width of caching image

height - height of caching image

Returns:

key for cache

thumb

public static byte[] thumb(java.lang.String url,
                           int width,
                           int height)

create transformation image

Parameters:

url - image url

width - output width

height - output height

Returns:

transformation image in byte array

thumb

public static byte[] thumb(java.lang.String url,
                           int width,
                           int height,
                           java.lang.String format)

create transformation image

Parameters:

url - image url

width - output width

height - output height

format - image format, for example png

Returns:

transformation image in byte array

cropImage

public static byte[] cropImage(byte[] image,
                               java.lang.Integer width,
                               java.lang.Integer height,
                               java.lang.Boolean stretch,
                               java.lang.String format)

crop image

Parameters:

image - input image in byte array

width - output width

height - output height

stretch - true if image must be stretched

format - image format

Returns:

crop image in byte array

getImage

public static byte[] getImage(byte[] image,
                              java.lang.Integer width,
                              java.lang.Integer height,
                              java.lang.String format,
                              java.lang.Boolean stretch,
                              java.lang.Boolean crop)

transform image

Parameters:

image - input image in byte array

width - output width

height - output height

format - image format

stretch - true if image must be stretched

crop - true if image must be crop

Returns:

transformation image

joinImages

public static byte[] joinImages(java.util.List<java.awt.Image> imageList,
                                java.lang.Integer width,
                                java.lang.Integer height,
                                java.lang.String format)
                         throws java.io.IOException

join images

Parameters:

imageList - list of Image object

width - output width

height - output height

format - image format

Returns:

byte array of join and transform image

Throws:

java.io.IOException - write to output stream is not correct