org.restlet.engine.application
Class RangeRepresentation

java.lang.Object
  org.restlet.representation.Variant
      org.restlet.representation.RepresentationInfo
          org.restlet.representation.Representation
              org.restlet.util.WrapperRepresentation
                  org.restlet.engine.application.RangeRepresentation

public class RangeRepresentation
extends WrapperRepresentation

Representation that exposes only a range of the content of a wrapped representation.

Author:

Jerome Louvel

Field Summary

Fields inherited from class org.restlet.representation.Representation

UNKNOWN_SIZE

Constructor Summary

RangeRepresentation(Representation wrappedRepresentation)
Constructor.

RangeRepresentation(Representation wrappedRepresentation, Range range)
Constructor.

Method Summary

long	getAvailableSize() Returns the size effectively available.
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.
Range	getRange() Returns the range specific to this wrapper.
Reader	getReader() Returns a characters reader with the representation's content.
InputStream	getStream() Returns a stream with the representation's content.
String	getText() Converts the representation to a string value.
void	setRange(Range range) Sets the range specific to this wrapper.
void	write(OutputStream outputStream) Writes the representation to a byte stream.
void	write(WritableByteChannel writableChannel) Writes the representation to a byte channel.
void	write(Writer writer) Writes the representation to a characters writer.

Methods inherited from class org.restlet.util.WrapperRepresentation

exhaust, getCharacterSet, getDigest, getDisposition, getEncodings, getExpirationDate, getLanguages, getLocationRef, getMediaType, getModificationDate, getRegistration, getSize, getTag, getWrappedRepresentation, isAvailable, isSelectable, isTransient, release, setAvailable, setCharacterSet, setDigest, setDisposition, setEncodings, setExpirationDate, setLanguages, setLocationRef, setLocationRef, setMediaType, setModificationDate, setSize, setTag, setTransient

Methods inherited from class org.restlet.representation.Representation

append, hasKnownSize, isEmpty, setListener

Methods inherited from class org.restlet.representation.Variant

createClientInfo, equals, includes, isCompatible, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

RangeRepresentation

public RangeRepresentation(Representation wrappedRepresentation)

Constructor.

Parameters:

wrappedRepresentation - The wrapped representation with a complete content.

RangeRepresentation

public RangeRepresentation(Representation wrappedRepresentation,
                           Range range)

Constructor.

Parameters:

wrappedRepresentation - The wrapped representation with a complete content.

range - The range to expose.

Method Detail

getAvailableSize

public long getAvailableSize()

Description copied from class: Representation

Returns the size effectively available. This returns the same value as Representation.getSize() if no range is defined, otherwise it returns the size of the range using Range.getSize().

Overrides:

getAvailableSize in class WrapperRepresentation

Returns:

The available size.

getChannel

public ReadableByteChannel getChannel()
                               throws 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.

Overrides:

getChannel in class WrapperRepresentation

Returns:

A channel with the representation's content.

Throws:

IOException

getRange

public Range getRange()

Returns the range specific to this wrapper. The wrapped representation must not have a range set itself.

Overrides:

getRange in class WrapperRepresentation

Returns:

The range specific to this wrapper.

getReader

public Reader getReader()
                 throws IOException

Description copied from class: Representation

Returns a characters reader with the representation's content. This method is ensured to return a fresh reader for each invocation unless it is a transient representation, in which case null is returned. If the representation has no character set defined, the system's default one will be used.

Overrides:

getReader in class WrapperRepresentation

Returns:

A reader with the representation's content.

Throws:

IOException

getStream

public InputStream getStream()
                      throws IOException

Description copied from class: Representation

Returns a stream with the representation's content. This method is ensured to return a fresh stream for each invocation unless it is a transient representation, in which case null is returned.

Overrides:

getStream in class WrapperRepresentation

Returns:

A stream with the representation's content.

Throws:

IOException

getText

public String getText()
               throws IOException

Description copied from class: Representation

Converts the representation to a string value. Be careful when using this method as the conversion of large content to a string fully stored in memory can result in OutOfMemoryErrors being thrown.

Overrides:

getText in class WrapperRepresentation

Returns:

The representation as a string value.

Throws:

IOException

setRange

public void setRange(Range range)

Sets the range specific to this wrapper. This will not affect the wrapped representation.

Overrides:

setRange in class WrapperRepresentation

Parameters:

range - The range specific to this wrapper.

write

public void write(Writer writer)
           throws IOException

Description copied from class: Representation

Writes the representation to a characters writer. 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.

Note that the class implementing this method shouldn't flush or close the given Writer after writing to it as this will be handled by the Restlet connectors automatically.

Overrides:

write in class WrapperRepresentation

Parameters:

writer - The characters writer.

Throws:

IOException

write

public void write(OutputStream outputStream)
           throws IOException

Description copied from class: Representation

Writes the representation to a byte stream. 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.

Note that the class implementing this method shouldn't flush or close the given OutputStream after writing to it as this will be handled by the Restlet connectors automatically.

Overrides:

write in class WrapperRepresentation

Parameters:

outputStream - The output stream.

Throws:

IOException

write

public void write(WritableByteChannel writableChannel)
           throws 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.

Overrides:

write in class WrapperRepresentation

Parameters:

writableChannel - A writable byte channel.

Throws:

IOException