org.apache.wicket.extensions.markup.html.captcha
Class CaptchaImageResource

java.lang.Object
  org.apache.wicket.request.resource.AbstractResource
      org.apache.wicket.request.resource.DynamicImageResource
          org.apache.wicket.extensions.markup.html.captcha.CaptchaImageResource

All Implemented Interfaces:

java.io.Serializable, IClusterable, IResource

public final class CaptchaImageResource
extends DynamicImageResource

Generates a captcha image.

Author:

Joshua Perlow

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.wicket.request.resource.AbstractResource

AbstractResource.ResourceResponse, AbstractResource.WriteCallback

Nested classes/interfaces inherited from interface org.apache.wicket.request.resource.IResource

IResource.Attributes

Field Summary

Fields inherited from class org.apache.wicket.request.resource.AbstractResource

INTERNAL_HEADERS

Constructor Summary

CaptchaImageResource()
Construct.

CaptchaImageResource(IModel<java.lang.String> challengeId)
Construct.

CaptchaImageResource(IModel<java.lang.String> challengeId, int fontSize, int margin)
Construct.

CaptchaImageResource(java.lang.String challengeId)
Construct.

CaptchaImageResource(java.lang.String challengeId, int fontSize, int margin)
Construct.

Method Summary

java.lang.String	getChallengeId() Gets the id for the challenge.
IModel<java.lang.String>	getChallengeIdModel() Gets the id for the challenge
protected byte[]	getImageData(IResource.Attributes attributes) Get image data for our dynamic image resource.
void	invalidate() Causes the image to be redrawn the next time its requested.

Methods inherited from class org.apache.wicket.request.resource.DynamicImageResource

configureResponse, getFormat, newResourceResponse, setFormat, setLastModifiedTime, toImageData

Methods inherited from class org.apache.wicket.request.resource.AbstractResource

configureCache, getCachingStrategy, respond, setResponseHeaders

Methods inherited from class java.lang.Object

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

Constructor Detail

CaptchaImageResource

public CaptchaImageResource()

Construct.

CaptchaImageResource

public CaptchaImageResource(java.lang.String challengeId)

Construct.

Parameters:

challengeId - The id of the challenge

CaptchaImageResource

public CaptchaImageResource(IModel<java.lang.String> challengeId)

Construct.

Parameters:

challengeId - The id of the challenge

CaptchaImageResource

public CaptchaImageResource(IModel<java.lang.String> challengeId,
                            int fontSize,
                            int margin)

Construct.

Parameters:

challengeId - The id of the challenge

fontSize - The font size

margin - The image's margin

CaptchaImageResource

public CaptchaImageResource(java.lang.String challengeId,
                            int fontSize,
                            int margin)

Construct.

Parameters:

challengeId - The id of the challenge

fontSize - The font size

margin - The image's margin

Method Detail

getChallengeId

public final java.lang.String getChallengeId()

Gets the id for the challenge.

Returns:

The id for the challenge

getChallengeIdModel

public final IModel<java.lang.String> getChallengeIdModel()

Gets the id for the challenge

Returns:

The id for the challenge

invalidate

public final void invalidate()

Causes the image to be redrawn the next time its requested.

getImageData

protected final byte[] getImageData(IResource.Attributes attributes)

Description copied from class: DynamicImageResource

Get image data for our dynamic image resource. If the subclass regenerates the data, it should set the DynamicImageResource.setLastModifiedTime(Time) when it does so. This ensures that image caching works correctly.

Specified by:

getImageData in class DynamicImageResource

Parameters:

attributes - the context bringing the request, response and the parameters

Returns:

The image data for this dynamic image. null means there is no image and 404 (Not found) response will be return.