Package org.apache.hadoop.io.compress.bzip2

Class Bzip2Factory

java.lang.Object

org.apache.hadoop.io.compress.bzip2.Bzip2Factory

public class Bzip2Factory
extends java.lang.Object

A collection of factories to create the right bzip2 compressor/decompressor instances.

Constructor Summary

Constructors

Constructor	Description
Bzip2Factory()

Method Summary

Modifier and Type	Method	Description
static int	getBlockSize(Configuration conf)
static Compressor	getBzip2Compressor(Configuration conf)	Return the appropriate implementation of the bzip2 compressor.
static java.lang.Class<? extends Compressor>	getBzip2CompressorType(Configuration conf)	Return the appropriate type of the bzip2 compressor.
static Decompressor	getBzip2Decompressor(Configuration conf)	Return the appropriate implementation of the bzip2 decompressor.
static java.lang.Class<? extends Decompressor>	getBzip2DecompressorType(Configuration conf)	Return the appropriate type of the bzip2 decompressor.
static java.lang.String	getLibraryName(Configuration conf)
static int	getWorkFactor(Configuration conf)
static boolean	isNativeBzip2Loaded(Configuration conf)	Check if native-bzip2 code is loaded & initialized correctly and can be loaded for this job.
static void	setBlockSize(Configuration conf, int blockSize)
static void	setWorkFactor(Configuration conf, int workFactor)

Methods inherited from class java.lang.Object

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

Constructor Detail

Bzip2Factory

public Bzip2Factory()

Method Detail

isNativeBzip2Loaded

public static boolean isNativeBzip2Loaded(Configuration conf)

Check if native-bzip2 code is loaded & initialized correctly and can be loaded for this job.

Parameters:

conf - configuration

Returns:

true if native-bzip2 is loaded & initialized and can be loaded for this job, else false

getLibraryName

public static java.lang.String getLibraryName(Configuration conf)

getBzip2CompressorType

public static java.lang.Class<? extends Compressor> getBzip2CompressorType(Configuration conf)

Return the appropriate type of the bzip2 compressor.

Parameters:

conf - configuration

Returns:

the appropriate type of the bzip2 compressor.

getBzip2Compressor

public static Compressor getBzip2Compressor(Configuration conf)

Return the appropriate implementation of the bzip2 compressor.

Parameters:

conf - configuration

Returns:

the appropriate implementation of the bzip2 compressor.

getBzip2DecompressorType

public static java.lang.Class<? extends Decompressor> getBzip2DecompressorType(Configuration conf)

Return the appropriate type of the bzip2 decompressor.

Parameters:

conf - configuration

Returns:

the appropriate type of the bzip2 decompressor.

getBzip2Decompressor

public static Decompressor getBzip2Decompressor(Configuration conf)

Return the appropriate implementation of the bzip2 decompressor.

Parameters:

conf - configuration

Returns:

the appropriate implementation of the bzip2 decompressor.

setBlockSize

public static void setBlockSize(Configuration conf,
                                int blockSize)

getBlockSize

public static int getBlockSize(Configuration conf)

setWorkFactor

public static void setWorkFactor(Configuration conf,
                                 int workFactor)

getWorkFactor

public static int getWorkFactor(Configuration conf)