nl.b3p.viewer.image

Class ImageTool

java.lang.Object

nl.b3p.viewer.image.ImageTool

public class ImageTool
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String	GIF
static String	JPEG
static String	PNG
static String	TIFF

Constructor Summary

Constructors

Constructor and Description
ImageTool()

Method Summary

Modifier and Type	Method and Description
static BufferedImage	changeColor(BufferedImage im, Color color, Color newColor)
static BufferedImage	combineImages(List<ReferencedImage> images, String mime, Integer width, Integer height) Method which handles the combining of the images.
static Shape	createImage(org.locationtech.jts.geom.Geometry geometrie, int bboxSrid, Bbox bbox, int width, int height)
static BufferedImage	drawGeometries(BufferedImage bi, CombineImageSettings settings)
static BufferedImage	drawGeometries(BufferedImage bi, CombineImageSettings settings, int srid, Bbox bbox, int width, int height)
static org.locationtech.jts.geom.Geometry	geometrieFromText(String wktgeom, int srid)
static String	getMimeType(String mime) Private method which seeks through the supported MIME types to check if a certain MIME is supported.
static BufferedImage	readImage(org.apache.commons.httpclient.HttpMethod method, String mime) Reads an image from an http input stream.
static Point	transformToScreen(Point source, int bboxSrid, Bbox bbox, int width, int height)
static void	writeImage(BufferedImage image, String mime, OutputStream os) First combines the given images to one image and then sends this image back to the client.

Methods inherited from class java.lang.Object

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

Field Detail

TIFF

public static final String TIFF

See Also:

Constant Field Values

GIF

public static final String GIF

See Also:

Constant Field Values

JPEG

public static final String JPEG

See Also:

Constant Field Values

PNG

public static final String PNG

See Also:

Constant Field Values

Constructor Detail

ImageTool

public ImageTool()

Method Detail

readImage

public static BufferedImage readImage(org.apache.commons.httpclient.HttpMethod method,
                                      String mime)
                               throws Exception

Reads an image from an http input stream.

Parameters:

method - Apache HttpClient GetMethod object

mime - String representing the mime type of the image.

Returns:

BufferedImage

Throws:

Exception - if any

writeImage

public static void writeImage(BufferedImage image,
                              String mime,
                              OutputStream os)
                       throws Exception

First combines the given images to one image and then sends this image back to the client.

Parameters:

image - image to be sent to the client.

mime - String representing the mime type of the image.

os - DataWrapper used to write the image.

Throws:

Exception - if any

drawGeometries

public static BufferedImage drawGeometries(BufferedImage bi,
                                           CombineImageSettings settings)
                                    throws Exception

Throws:

Exception

drawGeometries

public static BufferedImage drawGeometries(BufferedImage bi,
                                           CombineImageSettings settings,
                                           int srid,
                                           Bbox bbox,
                                           int width,
                                           int height)
                                    throws Exception

Throws:

Exception

createImage

public static Shape createImage(org.locationtech.jts.geom.Geometry geometrie,
                                int bboxSrid,
                                Bbox bbox,
                                int width,
                                int height)
                         throws Exception

Throws:

Exception

transformToScreen

public static Point transformToScreen(Point source,
                                      int bboxSrid,
                                      Bbox bbox,
                                      int width,
                                      int height)
                               throws Exception

Throws:

Exception

geometrieFromText

public static org.locationtech.jts.geom.Geometry geometrieFromText(String wktgeom,
                                                                   int srid)

combineImages

public static BufferedImage combineImages(List<ReferencedImage> images,
                                          String mime,
                                          Integer width,
                                          Integer height)

Method which handles the combining of the images. This method redirects to the right method for the different images, since not every image can be combined in the same way.

Parameters:

images - BufferedImage array with the images tha have to be combined.

mime - String representing the mime type of the image.

width - the width of the result image (or null if the width of the first image must be used)

height - the height of the result image (or null if the width of the first image must be used)

Returns:

BufferedImage

getMimeType

public static String getMimeType(String mime)

Private method which seeks through the supported MIME types to check if a certain MIME is supported.

Parameters:

mime - String with the MIME to find.

Returns:

a String with the found MIME or null if no MIME was found.

changeColor

public static BufferedImage changeColor(BufferedImage im,
                                        Color color,
                                        Color newColor)