wicket.markup.html.image.resource
Class BlobImageResource

java.lang.Object
  wicket.Resource
      wicket.markup.html.WebResource
          wicket.resource.DynamicByteArrayResource
              wicket.markup.html.image.resource.DynamicImageResource
                  wicket.markup.html.image.resource.BlobImageResource

All Implemented Interfaces:

IRequestListener, IResourceListener, java.io.Serializable

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

Constructor Summary

BlobImageResource()
Construct.

Method Summary

protected abstract java.sql.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 wicket.markup.html.image.resource.DynamicImageResource

getContentType, getData, getFormat, setFormat, toImageData

Methods inherited from class wicket.resource.DynamicByteArrayResource

getCacheTimeout, getResourceStream, lastModifiedTime, setCacheTimeout, setLastModifiedTime

Methods inherited from class wicket.markup.html.WebResource

configureResponse, setHeaders

Methods inherited from class wicket.Resource

getIdleTimeout, getParameters, invalidate, isCacheable, onResourceRequested, setCacheable, setIdleTimeout, setParameters

Methods inherited from class java.lang.Object

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

Constructor Detail

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 java.sql.Blob getBlob()

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

Returns:

the BLOB