org.apache.sshd.common.compression

Class CompressionZlib

java.lang.Object

org.apache.sshd.common.compression.BaseCompression

org.apache.sshd.common.compression.CompressionZlib

All Implemented Interfaces:

Compression, CompressionInformation, NamedResource

Direct Known Subclasses:

CompressionDelayedZlib

public class CompressionZlib
extends BaseCompression

ZLib based Compression.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.sshd.common.compression.Compression

Compression.Type

Field Summary

Fields

Modifier and Type	Field and Description
private static int	BUF_SIZE
private java.util.zip.Deflater	compresser
private java.util.zip.Inflater	decompresser
private byte[]	tmpbuf

Fields inherited from interface org.apache.sshd.common.NamedResource

BY_NAME_COMPARATOR, NAME_EXTRACTOR

Constructor Summary

Constructors

Modifier	Constructor and Description
	CompressionZlib() Create a new instance of a ZLib base compression
protected	CompressionZlib(java.lang.String name)

Method Summary

Modifier and Type	Method and Description
void	compress(Buffer buffer) Compress the given buffer in place.
void	init(Compression.Type type, int level) Initialize this object to either compress or uncompress data.
boolean	isDelayed() Delayed compression is an Open-SSH specific feature which informs both the client and server to not compress data before the session has been authenticated.
void	uncompress(Buffer from, Buffer to) Uncompress the data in a buffer into another buffer.

Methods inherited from class org.apache.sshd.common.compression.BaseCompression

getName, isCompressionExecuted, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.sshd.common.NamedResource

findByName, getNameList, getNames, ofName, removeByName

Field Detail

BUF_SIZE

private static final int BUF_SIZE

See Also:

Constant Field Values

tmpbuf

private byte[] tmpbuf

compresser

private java.util.zip.Deflater compresser

decompresser

private java.util.zip.Inflater decompresser

Constructor Detail

CompressionZlib

public CompressionZlib()

Create a new instance of a ZLib base compression

CompressionZlib

protected CompressionZlib(java.lang.String name)

Method Detail

isDelayed

public boolean isDelayed()

Description copied from interface: CompressionInformation

Delayed compression is an Open-SSH specific feature which informs both the client and server to not compress data before the session has been authenticated.

Returns:

if the compression is delayed after authentication or not

init

public void init(Compression.Type type,
                 int level)

Description copied from interface: Compression

Initialize this object to either compress or uncompress data. This method must be called prior to any calls to either compress or uncompress. Once the object has been initialized, only one of compress or uncompress methods can be called.

Parameters:

type - compression type

level - compression level

compress

public void compress(Buffer buffer)
              throws java.io.IOException

Description copied from interface: Compression

Compress the given buffer in place.

Parameters:

buffer - the buffer containing the data to compress

Throws:

java.io.IOException - if an error occurs

uncompress

public void uncompress(Buffer from,
                       Buffer to)
                throws java.io.IOException

Description copied from interface: Compression

Uncompress the data in a buffer into another buffer.

Parameters:

from - the buffer containing the data to uncompress

to - the buffer receiving the uncompressed data

Throws:

java.io.IOException - if an error occurs