org.apache.hadoop.io.compress.zlib

类 ZlibFactory

java.lang.Object

org.apache.hadoop.io.compress.zlib.ZlibFactory

public class ZlibFactory
extends Object

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

构造器概要

构造器

构造器和说明
ZlibFactory()

方法概要

方法

限定符和类型	方法和说明
static ZlibCompressor.CompressionLevel	getCompressionLevel(Configuration conf)
static ZlibCompressor.CompressionStrategy	getCompressionStrategy(Configuration conf)
static Compressor	getZlibCompressor(Configuration conf) Return the appropriate implementation of the zlib compressor.
static Class<? extends Compressor>	getZlibCompressorType(Configuration conf) Return the appropriate type of the zlib compressor.
static Decompressor	getZlibDecompressor(Configuration conf) Return the appropriate implementation of the zlib decompressor.
static Class<? extends Decompressor>	getZlibDecompressorType(Configuration conf) Return the appropriate type of the zlib decompressor.
static boolean	isNativeZlibLoaded(Configuration conf) Check if native-zlib code is loaded & initialized correctly and can be loaded for this job.
static void	setCompressionLevel(Configuration conf, ZlibCompressor.CompressionLevel level)
static void	setCompressionStrategy(Configuration conf, ZlibCompressor.CompressionStrategy strategy)

从类继承的方法 java.lang.Object

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

构造器详细资料

ZlibFactory

public ZlibFactory()

方法详细资料

isNativeZlibLoaded

public static boolean isNativeZlibLoaded(Configuration conf)

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

参数:

conf - configuration

返回:

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

getZlibCompressorType

public static Class<? extends Compressor> getZlibCompressorType(Configuration conf)

Return the appropriate type of the zlib compressor.

参数:

conf - configuration

返回:

the appropriate type of the zlib compressor.

getZlibCompressor

public static Compressor getZlibCompressor(Configuration conf)

Return the appropriate implementation of the zlib compressor.

参数:

conf - configuration

返回:

the appropriate implementation of the zlib compressor.

getZlibDecompressorType

public static Class<? extends Decompressor> getZlibDecompressorType(Configuration conf)

Return the appropriate type of the zlib decompressor.

参数:

conf - configuration

返回:

the appropriate type of the zlib decompressor.

getZlibDecompressor

public static Decompressor getZlibDecompressor(Configuration conf)

Return the appropriate implementation of the zlib decompressor.

参数:

conf - configuration

返回:

the appropriate implementation of the zlib decompressor.

setCompressionStrategy

public static void setCompressionStrategy(Configuration conf,
                          ZlibCompressor.CompressionStrategy strategy)

getCompressionStrategy

public static ZlibCompressor.CompressionStrategy getCompressionStrategy(Configuration conf)

setCompressionLevel

public static void setCompressionLevel(Configuration conf,
                       ZlibCompressor.CompressionLevel level)

getCompressionLevel

public static ZlibCompressor.CompressionLevel getCompressionLevel(Configuration conf)