org.apache.hadoop.io.compress

类 GzipCodec

java.lang.Object

org.apache.hadoop.io.compress.DefaultCodec

org.apache.hadoop.io.compress.GzipCodec

所有已实现的接口:

Configurable, CompressionCodec

public class GzipCodec
extends DefaultCodec

This class creates gzip compressors/decompressors.

嵌套类概要

嵌套类

限定符和类型	类和说明
protected static class	GzipCodec.GzipOutputStream A bridge that wraps around a DeflaterOutputStream to make it a CompressionOutputStream.

构造器概要

构造器

构造器和说明
GzipCodec()

方法概要

方法

限定符和类型	方法和说明
Compressor	createCompressor() Create a new Compressor for use by this CompressionCodec.
Decompressor	createDecompressor() Create a new Decompressor for use by this CompressionCodec.
CompressionInputStream	createInputStream(InputStream in) Create a stream decompressor that will read from the given input stream.
CompressionInputStream	createInputStream(InputStream in, Decompressor decompressor) Create a CompressionInputStream that will read from the given InputStream with the given Decompressor.
CompressionOutputStream	createOutputStream(OutputStream out) Create a CompressionOutputStream that will write to the given OutputStream.
CompressionOutputStream	createOutputStream(OutputStream out, Compressor compressor) Create a CompressionOutputStream that will write to the given OutputStream with the given Compressor.
Class<? extends Compressor>	getCompressorType() Get the type of Compressor needed by this CompressionCodec.
Class<? extends Decompressor>	getDecompressorType() Get the type of Decompressor needed by this CompressionCodec.
String	getDefaultExtension() Get the default filename extension for this kind of compression.

从类继承的方法 org.apache.hadoop.io.compress.DefaultCodec

getConf, setConf

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

GzipCodec

public GzipCodec()

方法详细资料

createOutputStream

public CompressionOutputStream createOutputStream(OutputStream out)
                                           throws IOException

从接口复制的说明: CompressionCodec

Create a CompressionOutputStream that will write to the given OutputStream.

指定者:

createOutputStream 在接口中 CompressionCodec

覆盖:

createOutputStream 在类中 DefaultCodec

参数:

out - the location for the final output stream

返回:

a stream the user can write uncompressed data to have it compressed

抛出:

IOException

createOutputStream

public CompressionOutputStream createOutputStream(OutputStream out,
                                         Compressor compressor)
                                           throws IOException

从接口复制的说明: CompressionCodec

Create a CompressionOutputStream that will write to the given OutputStream with the given Compressor.

指定者:

createOutputStream 在接口中 CompressionCodec

覆盖:

createOutputStream 在类中 DefaultCodec

参数:

out - the location for the final output stream

compressor - compressor to use

返回:

a stream the user can write uncompressed data to have it compressed

抛出:

IOException

createCompressor

public Compressor createCompressor()

从接口复制的说明: CompressionCodec

Create a new Compressor for use by this CompressionCodec.

指定者:

createCompressor 在接口中 CompressionCodec

覆盖:

createCompressor 在类中 DefaultCodec

返回:

a new compressor for use by this codec

getCompressorType

public Class<? extends Compressor> getCompressorType()

从接口复制的说明: CompressionCodec

Get the type of Compressor needed by this CompressionCodec.

指定者:

getCompressorType 在接口中 CompressionCodec

覆盖:

getCompressorType 在类中 DefaultCodec

返回:

the type of compressor needed by this codec.

createInputStream

public CompressionInputStream createInputStream(InputStream in)
                                         throws IOException

从接口复制的说明: CompressionCodec

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

指定者:

createInputStream 在接口中 CompressionCodec

覆盖:

createInputStream 在类中 DefaultCodec

参数:

in - the stream to read compressed bytes from

返回:

a stream to read uncompressed bytes from

抛出:

IOException

createInputStream

public CompressionInputStream createInputStream(InputStream in,
                                       Decompressor decompressor)
                                         throws IOException

从接口复制的说明: CompressionCodec

Create a CompressionInputStream that will read from the given InputStream with the given Decompressor.

指定者:

createInputStream 在接口中 CompressionCodec

覆盖:

createInputStream 在类中 DefaultCodec

参数:

in - the stream to read compressed bytes from

decompressor - decompressor to use

返回:

a stream to read uncompressed bytes from

抛出:

IOException

createDecompressor

public Decompressor createDecompressor()

从接口复制的说明: CompressionCodec

Create a new Decompressor for use by this CompressionCodec.

指定者:

createDecompressor 在接口中 CompressionCodec

覆盖:

createDecompressor 在类中 DefaultCodec

返回:

a new decompressor for use by this codec

getDecompressorType

public Class<? extends Decompressor> getDecompressorType()

从接口复制的说明: CompressionCodec

Get the type of Decompressor needed by this CompressionCodec.

指定者:

getDecompressorType 在接口中 CompressionCodec

覆盖:

getDecompressorType 在类中 DefaultCodec

返回:

the type of decompressor needed by this codec.

getDefaultExtension

public String getDefaultExtension()

从接口复制的说明: CompressionCodec

Get the default filename extension for this kind of compression.

指定者:

getDefaultExtension 在接口中 CompressionCodec

覆盖:

getDefaultExtension 在类中 DefaultCodec

返回:

the extension including the '.'