org.jboss.netty.handler.stream

Class ChunkedStream

java.lang.Object

org.jboss.netty.handler.stream.ChunkedStream

All Implemented Interfaces:

ChunkedInput

public class ChunkedStream
extends java.lang.Object
implements ChunkedInput

A ChunkedInput that fetches data from an InputStream chunk by chunk.

Please note that the InputStream instance that feeds data into ChunkedStream must implement InputStream.available() as accurately as possible, rather than using the default implementation. Otherwise, ChunkedStream will generate many too small chunks or block unnecessarily often.

Field Summary

Fields

Modifier and Type	Field and Description
private int	chunkSize
(package private) static int	DEFAULT_CHUNK_SIZE
private java.io.PushbackInputStream	in
private long	offset

Constructor Summary

Constructors

Constructor and Description
ChunkedStream(java.io.InputStream in) Creates a new instance that fetches data from the specified stream.
ChunkedStream(java.io.InputStream in, int chunkSize) Creates a new instance that fetches data from the specified stream.

Method Summary

Modifier and Type	Method and Description
void	close() Releases the resources associated with the stream.
long	getTransferredBytes() Returns the number of transferred bytes.
boolean	hasNextChunk() Returns true if and only if there is any data left in the stream.
boolean	isEndOfInput() Return true if and only if there is no data left in the stream and the stream has reached at its end.
java.lang.Object	nextChunk() Fetches a chunked data from the stream.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CHUNK_SIZE

static final int DEFAULT_CHUNK_SIZE

See Also:

Constant Field Values

in

private final java.io.PushbackInputStream in

chunkSize

private final int chunkSize

offset

private long offset

Constructor Detail

ChunkedStream

public ChunkedStream(java.io.InputStream in)

Creates a new instance that fetches data from the specified stream.

ChunkedStream

public ChunkedStream(java.io.InputStream in,
                     int chunkSize)

Creates a new instance that fetches data from the specified stream.

Parameters:

chunkSize - the number of bytes to fetch on each nextChunk() call

Method Detail

getTransferredBytes

public long getTransferredBytes()

Returns the number of transferred bytes.

hasNextChunk

public boolean hasNextChunk()
                     throws java.lang.Exception

Description copied from interface: ChunkedInput

Returns true if and only if there is any data left in the stream. Please note that false does not necessarily mean that the stream has reached at its end. In a slow stream, the next chunk might be unavailable just momentarily.

Specified by:

hasNextChunk in interface ChunkedInput

Throws:

java.lang.Exception

isEndOfInput

public boolean isEndOfInput()
                     throws java.lang.Exception

Description copied from interface: ChunkedInput

Return true if and only if there is no data left in the stream and the stream has reached at its end.

Specified by:

isEndOfInput in interface ChunkedInput

Throws:

java.lang.Exception

close

public void close()
           throws java.lang.Exception

Description copied from interface: ChunkedInput

Releases the resources associated with the stream.

Specified by:

close in interface ChunkedInput

Throws:

java.lang.Exception

nextChunk

public java.lang.Object nextChunk()
                           throws java.lang.Exception

Description copied from interface: ChunkedInput

Fetches a chunked data from the stream. The returned chunk is usually a ChannelBuffer, but you could extend an existing implementation to convert the ChannelBuffer into a different type that your handler or encoder understands. Once this method returns the last chunk and thus the stream has reached at its end, any subsequent ChunkedInput.isEndOfInput() call must return false.

Specified by:

nextChunk in interface ChunkedInput

Returns:

the fetched chunk, which is usually ChannelBuffer. null if there is no data left in the stream. Please note that null does not necessarily mean that the stream has reached at its end. In a slow stream, the next chunk might be unavailable just momentarily.

Throws:

java.lang.Exception