de.vc.io

Class ChunkCodec

java.lang.Object

de.vc.io.ChunkCodec

Direct Known Subclasses:

CompressingChunkCodec

public class ChunkCodec
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
ChunkCodec() Creates a new codecs for encoding and decoding chunks.
ChunkCodec(boolean optimize) Creates a new codecs for encoding and decoding chunks and sets the optimize flag.
ChunkCodec(int minChunkSizeEnc) Creates a new codecs for encoding and decoding chunks and sets the minimal size of chunks that are encoded.
ChunkCodec(int minChunkSizeEnc, boolean optimize) Creates a new codex for encoding and decoding chunks, sets the minimal size of chunks that are encoded and optimize flag.

Method Summary

Modifier and Type	Method and Description
protected void	decode(byte[] bytes, int len) Do overwrite this methode for decoding a chunk.
protected void	encode(byte[] bytes, int len) Do overwrite this methode for encoding a chunk.
protected void	writeDecoded(byte[] bytes) Use this call back methode for decoding.
protected void	writeDecoded(byte[] bytes, int len) Use this call back methode for decoding.
protected void	writeEncoded(byte[] bytes) Use this call back methode for encoding.
protected void	writeEncoded(byte[] bytes, int len) Use this call back methode for encoding.

Methods inherited from class java.lang.Object

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

Constructor Detail

ChunkCodec

public ChunkCodec()

Creates a new codecs for encoding and decoding chunks. The minimal chunk size for encoding is set to zero.

ChunkCodec

public ChunkCodec(int minChunkSizeEnc)

Creates a new codecs for encoding and decoding chunks and sets the minimal size of chunks that are encoded. Chunks with a length less than this minimum are not encoded. If this codex is used for crypting chunks we recommend you to set this minimum to zero for compressing chunks use you should use this minimum.

Parameters:

minChunkSizeEnc - Minimal size of chunks that are encoded.

ChunkCodec

public ChunkCodec(boolean optimize)

Creates a new codecs for encoding and decoding chunks and sets the optimize flag. If the encoded chunk is bigger than the plain chunk and the optimize flag is set, the plain chunk is written. This is useful for compressing chunks; for crypting chunks the optimze flag should always be false.

Parameters:

optimize - true, if optimze.

ChunkCodec

public ChunkCodec(int minChunkSizeEnc,
                  boolean optimize)

Creates a new codex for encoding and decoding chunks, sets the minimal size of chunks that are encoded and optimize flag.

Parameters:

minChunkSizeEnc - Minimal size of chunks that are encoded.

optimize - true, if optimze.

Method Detail

encode

protected void encode(byte[] bytes,
                      int len)
               throws java.io.IOException

Do overwrite this methode for encoding a chunk. If you have encoded the chunk call writeEncoded() methods.

Parameters:

bytes - Bytes of chunk. Note to respect the len parameter.

len - Length of chunk.

Throws:

java.io.IOException

decode

protected void decode(byte[] bytes,
                      int len)
               throws java.io.IOException

Do overwrite this methode for decoding a chunk. If you have decoded the chunk call writeDecoded() methods.

Parameters:

bytes - Bytes of chunk. Note to respect the len parameter.

len - Length of chunk.

Throws:

java.io.IOException

writeEncoded

protected final void writeEncoded(byte[] bytes)
                           throws java.io.IOException

Use this call back methode for encoding.

Parameters:

bytes - Encoded bytes.

Throws:

java.io.IOException

writeEncoded

protected final void writeEncoded(byte[] bytes,
                                  int len)
                           throws java.io.IOException

Use this call back methode for encoding.

Parameters:

bytes - Encoded bytes.

len - Length.

Throws:

java.io.IOException

writeDecoded

protected final void writeDecoded(byte[] bytes)
                           throws java.io.IOException

Use this call back methode for decoding.

Parameters:

bytes - Encoded bytes.

Throws:

java.io.IOException

writeDecoded

protected final void writeDecoded(byte[] bytes,
                                  int len)
                           throws java.io.IOException

Use this call back methode for decoding.

Parameters:

bytes - Encoded bytes.

len - Length.

Throws:

java.io.IOException