org.apache.wicket.markup.html.image.resource
Class BlobImageResource

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.markup.html.image.resource.BlobImageResource

All Implemented Interfaces:

Serializable, IClusterable, IRequestListener, IResourceListener

public abstract class BlobImageResource
extends DynamicImageResource

An ImageResource subclass for dynamic images that come from database BLOB fields. Subclasses override getBlob() to provide the image data to send back to the user. A given subclass may decide how to produce this data and whether/how to buffer it.

Author:

Eelco Hillenius

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

BlobImageResource()
Construct.

BlobImageResource(Locale locale)
Construct.

BlobImageResource(String format)
Construct.

BlobImageResource(String format, Locale locale)
Construct.

Method Summary

protected abstract Blob	getBlob() Gets the BLOB (Binary Large OBject) that holds the raw image data.
protected byte[]	getImageData() Get image data for our dynamic image resource.

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, invalidate, isCacheable, onResourceRequested, setCacheable, setParameters

Methods inherited from class java.lang.Object

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

Constructor Detail

BlobImageResource

public BlobImageResource(Locale locale)

Construct.

Parameters:

locale -

BlobImageResource

public BlobImageResource(String format,
                         Locale locale)

Construct.

Parameters:

format -

locale -

BlobImageResource

public BlobImageResource(String format)

Construct.

Parameters:

format -

BlobImageResource

public BlobImageResource()

Construct.

Method Detail

getImageData

protected 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()

getBlob

protected abstract Blob getBlob()

Gets the BLOB (Binary Large OBject) that holds the raw image data.

Returns:

the BLOB