org.apache.wicket.request.resource

Class AbstractResource

java.lang.Object

org.apache.wicket.request.resource.AbstractResource

All Implemented Interfaces:

Serializable, IResource, IClusterable

Direct Known Subclasses:

BaseDataResource, ConcatBundleResource, ContextRelativeResource, DynamicImageResource, FileSystemResource, PackageResource, ResourceStreamResource

public abstract class AbstractResource
extends Object
implements IResource

Convenience resource implementation. The subclass must implement newResourceResponse(org.apache.wicket.request.resource.IResource.Attributes) method.

Author:

Matej Knopp, Tobias Soloschenko

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AbstractResource.ContentRangeType All available content range types.
static class	AbstractResource.ResourceResponse Represents data used to configure response and write resource data.
static class	AbstractResource.WriteCallback Callback invoked when resource data needs to be written to response.

Nested classes/interfaces inherited from interface org.apache.wicket.request.resource.IResource

IResource.Attributes

Field Summary

Fields

Modifier and Type	Field and Description
static String	CONTENT_DISPOSITION_HEADER_NAME
static MetaDataKey<Long>	CONTENT_RANGE_ENDBYTE The meta data key of the content range end byte
static MetaDataKey<Long>	CONTENT_RANGE_STARTBYTE The meta data key of the content range start byte
static Set<String>	INTERNAL_HEADERS header values that are managed internally and must not be set directly

Constructor Summary

Constructors

Constructor and Description
AbstractResource() Construct.

Method Summary

Modifier and Type	Method and Description
protected void	configureCache(AbstractResource.ResourceResponse data, IResource.Attributes attributes) Configure the web response header for client cache control.
protected IResourceCachingStrategy	getCachingStrategy()
protected abstract AbstractResource.ResourceResponse	newResourceResponse(IResource.Attributes attributes) Override this method to return a AbstractResource.ResourceResponse for the request.
void	respond(IResource.Attributes attributes) Renders this resource to response using the provided attributes.
protected void	setRequestMetaData(IResource.Attributes attributes) Reads the plain request header information and applies enriched information as meta data to the current request.
protected void	setRequestRangeMetaData(WebRequest webRequest)
protected boolean	setResponseContentRangeHeaderFields(WebResponse webResponse, IResource.Attributes attributes, long contentLength) Sets the content range header fields to the given web response
protected void	setResponseHeaders(AbstractResource.ResourceResponse resourceResponse, IResource.Attributes attributes) Sets the response header of resource response to the response received from the attributes

Methods inherited from class java.lang.Object

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

Field Detail

INTERNAL_HEADERS

public static final Set<String> INTERNAL_HEADERS

header values that are managed internally and must not be set directly

CONTENT_RANGE_STARTBYTE

public static final MetaDataKey<Long> CONTENT_RANGE_STARTBYTE

The meta data key of the content range start byte

CONTENT_RANGE_ENDBYTE

public static final MetaDataKey<Long> CONTENT_RANGE_ENDBYTE

The meta data key of the content range end byte

CONTENT_DISPOSITION_HEADER_NAME

public static final String CONTENT_DISPOSITION_HEADER_NAME

See Also:

Constant Field Values

Constructor Detail

AbstractResource

public AbstractResource()

Construct.

Method Detail

newResourceResponse

protected abstract AbstractResource.ResourceResponse newResourceResponse(IResource.Attributes attributes)

Override this method to return a AbstractResource.ResourceResponse for the request.

Parameters:

attributes - request attributes

Returns:

resource data instance

configureCache

protected void configureCache(AbstractResource.ResourceResponse data,
                              IResource.Attributes attributes)

Configure the web response header for client cache control.

Parameters:

data - resource data

attributes - request attributes

getCachingStrategy

protected IResourceCachingStrategy getCachingStrategy()

respond

public void respond(IResource.Attributes attributes)

Description copied from interface: IResource

Renders this resource to response using the provided attributes.

Specified by:

respond in interface IResource

See Also:

IResource.respond(org.apache.wicket.request.resource.IResource.Attributes)

setRequestMetaData

protected void setRequestMetaData(IResource.Attributes attributes)

Reads the plain request header information and applies enriched information as meta data to the current request. Those information are available for the whole request cycle.

Parameters:

attributes - the attributes to get the plain request header information

setRequestRangeMetaData

protected void setRequestRangeMetaData(WebRequest webRequest)

setResponseHeaders

protected void setResponseHeaders(AbstractResource.ResourceResponse resourceResponse,
                                  IResource.Attributes attributes)

Sets the response header of resource response to the response received from the attributes

Parameters:

resourceResponse - the resource response to get the header fields from

attributes - the attributes to get the response from to which the header information are going to be applied

setResponseContentRangeHeaderFields

protected boolean setResponseContentRangeHeaderFields(WebResponse webResponse,
                                                      IResource.Attributes attributes,
                                                      long contentLength)

Sets the content range header fields to the given web response

Parameters:

webResponse - the web response to apply the content range information to

attributes - the attributes to get the request from

contentLength - the content length of the response

Returns:

if the content range header information has been applied