Package org.apache.wicket.extensions.markup.html.image.resource

Class ThumbnailImageResource

java.lang.Object

org.apache.wicket.request.resource.AbstractResource

org.apache.wicket.request.resource.DynamicImageResource

org.apache.wicket.extensions.markup.html.image.resource.ThumbnailImageResource

All Implemented Interfaces:

Serializable, IResource, IClusterable

public class ThumbnailImageResource
extends DynamicImageResource

Image resource that dynamically scales the given original resource to a thumbnail. It is scaled either using the given maxSize as width or height, depending on its shape. If both the width and height are less than maxSize, no scaling is performed.

Author:

Eelco Hillenius, Eugene Kamenev

See Also:

Serialized Form

Nested Class Summary

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

AbstractResource.ContentRangeType, 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

CONTENT_DISPOSITION_HEADER_NAME, CONTENT_RANGE_ENDBYTE, CONTENT_RANGE_STARTBYTE, INTERNAL_HEADERS

Constructor Summary

Constructors

Constructor	Description
ThumbnailImageResource(IResource unscaledImageResource, int maxSize)	Construct.

Method Summary

Modifier and Type	Method	Description
protected byte[]	getImageData(IResource.Attributes attributes)	Get image data for our dynamic image resource.
protected BufferedImage	getScaledImageInstance(IResource.Attributes attributes)	get resized image instance.

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, setRequestMetaData, setRequestRangeMetaData, setResponseContentRangeHeaderFields, setResponseHeaders

Methods inherited from class java.lang.Object

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

Constructor Detail

ThumbnailImageResource

public ThumbnailImageResource(IResource unscaledImageResource,
                              int maxSize)

Construct.

Parameters:

unscaledImageResource - the unscaled, original image resource. Must be not null

maxSize - maximum size (width or height) for resize operation

Method Detail

getImageData

protected 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(Instant) 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

getScaledImageInstance

protected BufferedImage getScaledImageInstance(IResource.Attributes attributes)

get resized image instance.

Parameters:

attributes -

Returns:

BufferedImage