Package org.restlet.representation

Class WritableRepresentation

java.lang.Object

org.restlet.representation.Variant

org.restlet.representation.RepresentationInfo

org.restlet.representation.Representation

org.restlet.representation.ChannelRepresentation

org.restlet.representation.WritableRepresentation

public abstract class WritableRepresentation
extends ChannelRepresentation

Representation based on a writable NIO byte channel. This class is a good basis to write your own representations, especially for the dynamic and large ones.

For this you just need to create a subclass and override the abstract Representation.write(WritableByteChannel) method. This method will later be called back by the connectors when the actual representation's content is needed.

Author:

Jerome Louvel

Field Summary

Fields inherited from class org.restlet.representation.Representation

UNKNOWN_SIZE

Constructor Summary

Constructors

Constructor	Description
WritableRepresentation(MediaType mediaType)	Constructor.

Method Summary

Modifier and Type	Method	Description
java.nio.channels.ReadableByteChannel	getChannel()	Returns a channel with the representation's content. If it is supported by a file, a read-only instance of FileChannel is returned. This method is ensured to return a fresh channel for each invocation unless it is a transient representation, in which case null is returned.
abstract void	write(java.nio.channels.WritableByteChannel writableChannel)	Writes the representation to a byte channel.

Methods inherited from class org.restlet.representation.ChannelRepresentation

getReader, getStream, write, write

Methods inherited from class org.restlet.representation.Representation

append, exhaust, getAvailableSize, getDigest, getDisposition, getExpirationDate, getRange, getRegistration, getSize, getText, hasKnownSize, isAvailable, isEmpty, isSelectable, isTransient, release, setAvailable, setDigest, setDisposition, setExpirationDate, setListener, setRange, setSize, setTransient

Methods inherited from class org.restlet.representation.RepresentationInfo

getModificationDate, getTag, setModificationDate, setTag

Methods inherited from class org.restlet.representation.Variant

createClientInfo, equals, getCharacterSet, getEncodings, getLanguages, getLocationRef, getMediaType, hashCode, includes, isCompatible, setCharacterSet, setEncodings, setLanguages, setLocationRef, setLocationRef, setMediaType, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

WritableRepresentation

public WritableRepresentation(MediaType mediaType)

Constructor.

Parameters:

mediaType - The representation's media type.

Method Detail

getChannel

public java.nio.channels.ReadableByteChannel getChannel()
                                                 throws java.io.IOException

Description copied from class: Representation

Returns a channel with the representation's content.
If it is supported by a file, a read-only instance of FileChannel is returned.
This method is ensured to return a fresh channel for each invocation unless it is a transient representation, in which case null is returned.

Specified by:

getChannel in class Representation

Returns:

A channel with the representation's content.

Throws:

java.io.IOException

write

public abstract void write(java.nio.channels.WritableByteChannel writableChannel)
                    throws java.io.IOException

Description copied from class: Representation

Writes the representation to a byte channel. This method is ensured to write the full content for each invocation unless it is a transient representation, in which case an exception is thrown.

Specified by:

write in class Representation

Parameters:

writableChannel - A writable byte channel.

Throws:

java.io.IOException