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

java.lang.Object
  org.apache.wicket.Resource
      org.apache.wicket.markup.html.WebResource
          org.apache.wicket.markup.html.DynamicWebResource
              org.apache.wicket.markup.html.image.resource.DynamicImageResource
                  org.apache.wicket.extensions.markup.html.captcha.CaptchaImageResource

All Implemented Interfaces:

java.io.Serializable, IClusterable, IRequestListener, IResourceListener

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.markup.html.DynamicWebResource

DynamicWebResource.ResourceState

Field Summary

Fields inherited from interface org.apache.wicket.IResourceListener

INTERFACE

Constructor Summary

CaptchaImageResource()
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.
protected byte[]	getImageData() 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.markup.html.image.resource.DynamicImageResource

getFormat, getResourceState, setFormat, setLastModifiedTime, toImageData

Methods inherited from class org.apache.wicket.markup.html.DynamicWebResource

getLocale, getResourceStream, setHeaders

Methods inherited from class org.apache.wicket.markup.html.WebResource

configureResponse, getCacheDuration

Methods inherited from class org.apache.wicket.Resource

getParameters, isCacheable, onResourceRequested, setCacheable, setParameters

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(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 the id for the challenge

invalidate

public final void invalidate()

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

Overrides:

invalidate in class Resource

See Also:

Resource.invalidate()

getImageData

protected final byte[] getImageData()

Description copied from class: DynamicImageResource

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

Specified by:

getImageData in class DynamicImageResource

Returns:

The image data for this dynamic image

See Also:

DynamicImageResource.getImageData()