org.opengts.util
Class Captcha

java.lang.Object
  org.opengts.util.Captcha

public class Captcha
extends java.lang.Object

Captcha Image Generator

Field Summary

static java.lang.String	DEFAULT_ALPHA
static java.lang.String	DEFAULT_FONT_NAME
static int	DEFAULT_FONT_SIZE
static int	DEFAULT_FONT_STYLE
static int	DEFAULT_HEIGHT
static boolean	DEFAULT_IGNORE_CASE
static int	DEFAULT_SYMBOL_COUNT
static int	DEFAULT_WIDTH

Constructor Summary

Captcha()
Constructor

Captcha(int symCount)
Constructor

Captcha(java.lang.String alphabet, boolean ignoreCase, int symCount)
Constructor

Method Summary

protected java.awt.Font	getFont(int size) Gets the captch font
byte[]	getImageBytes() Creates/returns the Captch image as a byte array
byte[]	getImageBytes(java.awt.Color bgColor, int width, int height) Creates/returns the Captch image as a byte array
byte[]	getImageBytes(int width, int height) Creates/returns the Captch image as a byte array
protected java.util.Random	getRandom() Gets the Captcha value randomizer
java.lang.String	getValue() Gets the target value of this captcha
static void	main(java.lang.String[] argv)
java.io.OutputStream	writeImage(java.awt.Color bgColor, int width, int height, java.io.OutputStream output) Writes the captcha image to the specified OutputStream.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_ALPHA

public static final java.lang.String DEFAULT_ALPHA

See Also:

Constant Field Values

DEFAULT_IGNORE_CASE

public static final boolean DEFAULT_IGNORE_CASE

See Also:

Constant Field Values

DEFAULT_SYMBOL_COUNT

public static final int DEFAULT_SYMBOL_COUNT

See Also:

Constant Field Values

DEFAULT_WIDTH

public static final int DEFAULT_WIDTH

See Also:

Constant Field Values

DEFAULT_HEIGHT

public static final int DEFAULT_HEIGHT

See Also:

Constant Field Values

DEFAULT_FONT_NAME

public static final java.lang.String DEFAULT_FONT_NAME

See Also:

Constant Field Values

DEFAULT_FONT_STYLE

public static final int DEFAULT_FONT_STYLE

See Also:

Constant Field Values

DEFAULT_FONT_SIZE

public static final int DEFAULT_FONT_SIZE

See Also:

Constant Field Values

Constructor Detail

Captcha

public Captcha()

Constructor

Captcha

public Captcha(int symCount)

Constructor

Captcha

public Captcha(java.lang.String alphabet,
               boolean ignoreCase,
               int symCount)

Constructor

Method Detail

getRandom

protected java.util.Random getRandom()

Gets the Captcha value randomizer

getFont

protected java.awt.Font getFont(int size)

Gets the captch font

getValue

public java.lang.String getValue()

Gets the target value of this captcha

writeImage

public java.io.OutputStream writeImage(java.awt.Color bgColor,
                                       int width,
                                       int height,
                                       java.io.OutputStream output)

Writes the captcha image to the specified OutputStream. If null is specified for the OutputStream, and new ByteArrayOutputStream will be created.

Parameters:

bgColor - The background color

width - The captcha image width

height - The captcha image height

output - The OutputStream to which the image is written

Returns:

The OutputStream to which the image was written

getImageBytes

public byte[] getImageBytes()

Creates/returns the Captch image as a byte array

Returns:

The image byte array

getImageBytes

public byte[] getImageBytes(int width,
                            int height)

Creates/returns the Captch image as a byte array

Parameters:

width - The captcha image width

height - The captcha image height

Returns:

The image byte array

getImageBytes

public byte[] getImageBytes(java.awt.Color bgColor,
                            int width,
                            int height)

Creates/returns the Captch image as a byte array

Parameters:

bgColor - The background color

width - The captcha image width

height - The captcha image height

Returns:

The image byte array

main

public static void main(java.lang.String[] argv)