org.apache.hadoop.io.compress
Class LzoCodec

java.lang.Object
  org.apache.hadoop.io.compress.LzoCodec

All Implemented Interfaces:

Configurable, CompressionCodec

public class LzoCodec
extends Object
implements Configurable, CompressionCodec

A CompressionCodec for a streaming lzo compression/decompression pair. http://www.oberhumer.com/opensource/lzo/

Author:

Arun C Murthy

Constructor Summary

LzoCodec()

Method Summary

CompressionInputStream	createInputStream(InputStream in) Create a stream decompressor that will read from the given input stream.
CompressionOutputStream	createOutputStream(OutputStream out) Create a stream compressor that will write to the given output stream.
Configuration	getConf() Return the configuration used by this object.
String	getDefaultExtension() Get the default filename extension for this kind of compression.
static boolean	isNativeLzoLoaded() Check if native-lzo library is loaded & initialized.
void	setConf(Configuration conf) Set the configuration to be used by this object.

Methods inherited from class java.lang.Object

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

Constructor Detail

LzoCodec

public LzoCodec()

Method Detail

setConf

public void setConf(Configuration conf)

Description copied from interface: Configurable

Set the configuration to be used by this object.

Specified by:

setConf in interface Configurable

getConf

public Configuration getConf()

Description copied from interface: Configurable

Return the configuration used by this object.

Specified by:

getConf in interface Configurable

isNativeLzoLoaded

public static boolean isNativeLzoLoaded()

Check if native-lzo library is loaded & initialized.

Returns:

true if native-lzo library is loaded & initialized; else false

createOutputStream

public CompressionOutputStream createOutputStream(OutputStream out)
                                           throws IOException

Description copied from interface: CompressionCodec

Create a stream compressor that will write to the given output stream.

Specified by:

createOutputStream in interface CompressionCodec

Parameters:

out - the location for the final output stream

Returns:

a stream the user can write uncompressed data to

Throws:

IOException

createInputStream

public CompressionInputStream createInputStream(InputStream in)
                                         throws IOException

Description copied from interface: CompressionCodec

Create a stream decompressor that will read from the given input stream.

Specified by:

createInputStream in interface CompressionCodec

Parameters:

in - the stream to read compressed bytes from

Returns:

a stream to read uncompressed bytes from

Throws:

IOException

getDefaultExtension

public String getDefaultExtension()

Get the default filename extension for this kind of compression.

Specified by:

getDefaultExtension in interface CompressionCodec

Returns:

the extension including the '.'