Package org.primefaces.application.resource

Class QRCodeHandler

java.lang.Object

org.primefaces.application.resource.BaseDynamicContentHandler

org.primefaces.application.resource.QRCodeHandler

All Implemented Interfaces:

DynamicContentHandler

public class QRCodeHandler
extends BaseDynamicContentHandler

Constructor Summary

Constructors

Constructor	Description
QRCodeHandler()

Method Summary

Modifier and Type	Method	Description
protected io.nayuki.qrcodegen.QrCode.Ecc	getErrorCorrection(String value)
void	handle(javax.faces.context.FacesContext context)
protected BufferedImage	toImage(io.nayuki.qrcodegen.QrCode qr, int scale, int border)
protected BufferedImage	toImage(io.nayuki.qrcodegen.QrCode qr, int scale, int border, int lightColor, int darkColor)	Returns a raster image depicting the specified QR Code, with the specified module scale, border modules, and module colors.
protected String	toSvgString(io.nayuki.qrcodegen.QrCode qr, int border, String lightColor, String darkColor)	Returns a string of SVG code for an image depicting the specified QR Code, with the specified number of border modules.

Methods inherited from class org.primefaces.application.resource.BaseDynamicContentHandler

handleCache

Methods inherited from class java.lang.Object

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

Constructor Detail

QRCodeHandler

public QRCodeHandler()

Method Detail

handle

public void handle(javax.faces.context.FacesContext context)
            throws IOException

Throws:

IOException

getErrorCorrection

protected io.nayuki.qrcodegen.QrCode.Ecc getErrorCorrection(String value)

toImage

protected BufferedImage toImage(io.nayuki.qrcodegen.QrCode qr,
                                int scale,
                                int border)

toImage

protected BufferedImage toImage(io.nayuki.qrcodegen.QrCode qr,
                                int scale,
                                int border,
                                int lightColor,
                                int darkColor)

Returns a raster image depicting the specified QR Code, with the specified module scale, border modules, and module colors.

For example, scale=10 and border=4 means to pad the QR Code with 4 light border modules on all four sides, and use 10×10 pixels to represent each module.

Parameters:

qr - the QR Code to render (not null)

scale - the side length (measured in pixels, must be positive) of each module

border - the number of border modules to add, which must be non-negative

lightColor - the color to use for light modules, in 0xRRGGBB format

darkColor - the color to use for dark modules, in 0xRRGGBB format

Returns:

a new image representing the QR Code, with padding and scaling

Throws:

NullPointerException - if the QR Code is null

IllegalArgumentException - if the scale or border is out of range, or if {scale, border, size} cause the image dimensions to exceed Integer.MAX_VALUE

toSvgString

protected String toSvgString(io.nayuki.qrcodegen.QrCode qr,
                             int border,
                             String lightColor,
                             String darkColor)

Returns a string of SVG code for an image depicting the specified QR Code, with the specified number of border modules. The string always uses Unix newlines (\n), regardless of the platform.

Parameters:

qr - the QR Code to render (not null)

border - the number of border modules to add, which must be non-negative

lightColor - the color to use for light modules, in any format supported by CSS, not null

darkColor - the color to use for dark modules, in any format supported by CSS, not null

Returns:

a string representing the QR Code as an SVG XML document

Throws:

NullPointerException - if any object is null

IllegalArgumentException - if the border is negative