com.sshtools.zlib

Class ZLibCompression

java.lang.Object

com.sshtools.zlib.ZLibCompression

All Implemented Interfaces:

SshComponent, SshCompression, SecureComponent

Direct Known Subclasses:

OpenSSHZLibCompression

public class ZLibCompression
extends Object
implements SshCompression

Field Summary

Fields inherited from interface com.maverick.ssh.compression.SshCompression

DEFLATER, INFLATER

Constructor Summary

Constructors

Constructor and Description
ZLibCompression()

Method Summary

Modifier and Type	Method and Description
byte[]	compress(byte[] buf, int start, int len) Compress a block of data.
String	getAlgorithm() Get the algorithm name for this compression implementation.
int	getPriority()
SecurityLevel	getSecurityLevel()
void	init(int type, int level) Initialize the compression.
boolean	isDelayed() Is this compression delayed until after authentication
byte[]	uncompress(byte[] buffer, int start, int length) Uncompress a block of data.

Methods inherited from class java.lang.Object

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

Constructor Detail

ZLibCompression

public ZLibCompression()

Method Detail

getAlgorithm

public String getAlgorithm()

Description copied from interface: SshCompression

Get the algorithm name for this compression implementation.

Specified by:

getAlgorithm in interface SshComponent

Specified by:

getAlgorithm in interface SshCompression

Specified by:

getAlgorithm in interface SecureComponent

Returns:

the algorithm name.

init

public void init(int type,
                 int level)

Description copied from interface: SshCompression

Initialize the compression.

Specified by:

init in interface SshCompression

Parameters:

type - the mode of the compression, should be either INFLATER or DEFLATER

level - the level of compression

compress

public byte[] compress(byte[] buf,
                       int start,
                       int len)
                throws IOException

Description copied from interface: SshCompression

Compress a block of data.

Specified by:

compress in interface SshCompression

Parameters:

buf - the data to compress

start - the offset of the data to compress

len - the length of the data

Returns:

the compressed data with any uncompressed data at the start remaining intact.

Throws:

IOException

uncompress

public byte[] uncompress(byte[] buffer,
                         int start,
                         int length)
                  throws IOException

Description copied from interface: SshCompression

Uncompress a block of data.

Specified by:

uncompress in interface SshCompression

Parameters:

buffer - the data to uncompress

start - the offset of the data to uncompress

length - the length of the data

Returns:

the uncompressed data with any data not compressed at the start remaining intact.

Throws:

IOException

getSecurityLevel

public SecurityLevel getSecurityLevel()

Specified by:

getSecurityLevel in interface SecureComponent

getPriority

public int getPriority()

Specified by:

getPriority in interface SecureComponent

isDelayed

public boolean isDelayed()

Description copied from interface: SshCompression

Is this compression delayed until after authentication

Specified by:

isDelayed in interface SshCompression

Returns: