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java.lang.Object org.apache.wicket.request.resource.AbstractResource org.apache.wicket.request.resource.DynamicImageResource
public abstract class DynamicImageResource
Base class for dynamically generated ImageResources.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.apache.wicket.request.resource.AbstractResource |
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AbstractResource.ResourceResponse, AbstractResource.WriteCallback |
Nested classes/interfaces inherited from interface org.apache.wicket.request.resource.IResource |
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IResource.Attributes |
Field Summary |
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Fields inherited from class org.apache.wicket.request.resource.AbstractResource |
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INTERNAL_HEADERS |
Constructor Summary | |
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DynamicImageResource()
Construct. |
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DynamicImageResource(String format)
Creates a dynamic resource from for the given locale |
Method Summary | |
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protected void |
configureResponse(AbstractResource.ResourceResponse response,
IResource.Attributes attributes)
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String |
getFormat()
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protected abstract byte[] |
getImageData(IResource.Attributes attributes)
Get image data for our dynamic image resource. |
protected AbstractResource.ResourceResponse |
newResourceResponse(IResource.Attributes attributes)
Override this method to return a AbstractResource.ResourceResponse for the request. |
void |
setFormat(String format)
Sets the format of this resource |
protected void |
setLastModifiedTime(Time time)
set the last modified time for this resource. |
protected byte[] |
toImageData(BufferedImage image)
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Methods inherited from class org.apache.wicket.request.resource.AbstractResource |
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configureCache, flushResponseAfterHeaders, getCachingStrategy, respond, setResponseHeaders |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public DynamicImageResource()
public DynamicImageResource(String format)
format
- The image format ("png", "jpeg", etc)Method Detail |
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public final String getFormat()
public final void setFormat(String format)
format
- The format (jpg, png or gif..)protected void setLastModifiedTime(Time time)
time
- protected byte[] toImageData(BufferedImage image)
image
- The image to turn into data
protected abstract byte[] getImageData(IResource.Attributes attributes)
setLastModifiedTime(Time)
when it does so. This
ensures that image caching works correctly.
attributes
- the context bringing the request, response and the parameters
null
means there is no image and 404
(Not found) response will be return.protected void configureResponse(AbstractResource.ResourceResponse response, IResource.Attributes attributes)
protected AbstractResource.ResourceResponse newResourceResponse(IResource.Attributes attributes)
AbstractResource
AbstractResource.ResourceResponse
for the request.
newResourceResponse
in class AbstractResource
attributes
- request attributes
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