com.hadoop.compression.lzo

Class LzopCodec

java.lang.Object

com.hadoop.compression.lzo.LzoCodec

com.hadoop.compression.lzo.LzopCodec

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.io.compress.CompressionCodec

public class LzopCodec
extends LzoCodec

A CompressionCodec for a streaming lzo compression/decompression pair compatible with lzop. http://www.lzop.org/

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.io.compress.CompressionCodec

org.apache.hadoop.io.compress.CompressionCodec.Util

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_LZO_EXTENSION
static byte[]	LZO_MAGIC 9 bytes at the top of every lzo file
static int	LZOP_COMPAT_VERSION Latest verion of lzop this should be compatible with
static int	LZOP_VERSION Version of lzop this emulates

Fields inherited from class com.hadoop.compression.lzo.LzoCodec

DEFAULT_LZO_BUFFER_SIZE, LZO_BUFFER_SIZE_KEY, LZO_COMPRESSION_LEVEL_KEY, LZO_COMPRESSOR_KEY, LZO_DECOMPRESSOR_KEY, MAX_BLOCK_SIZE, UNDEFINED_COMPRESSION_LEVEL

Constructor Summary

Constructors

Constructor and Description
LzopCodec()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.io.compress.Decompressor	createDecompressor()
org.apache.hadoop.io.compress.CompressionOutputStream	createIndexedOutputStream(OutputStream out, DataOutputStream indexOut)
org.apache.hadoop.io.compress.CompressionOutputStream	createIndexedOutputStream(OutputStream out, DataOutputStream indexOut, org.apache.hadoop.io.compress.Compressor compressor)
org.apache.hadoop.io.compress.CompressionInputStream	createInputStream(InputStream in)
org.apache.hadoop.io.compress.CompressionInputStream	createInputStream(InputStream in, org.apache.hadoop.io.compress.Decompressor decompressor)
org.apache.hadoop.io.compress.CompressionOutputStream	createOutputStream(OutputStream out)
org.apache.hadoop.io.compress.CompressionOutputStream	createOutputStream(OutputStream out, org.apache.hadoop.io.compress.Compressor compressor)
Class<? extends org.apache.hadoop.io.compress.Decompressor>	getDecompressorType()
String	getDefaultExtension() Get the default filename extension for this kind of compression.

Methods inherited from class com.hadoop.compression.lzo.LzoCodec

createCompressor, getCompressorType, getConf, getRevisionHash, isNativeLzoLoaded, setBufferSize, setCompressionLevel, setCompressionStrategy, setConf, setDecompressionStrategy

Methods inherited from class java.lang.Object

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

Field Detail

LZO_MAGIC

public static final byte[] LZO_MAGIC

9 bytes at the top of every lzo file

LZOP_VERSION

public static final int LZOP_VERSION

Version of lzop this emulates

See Also:

Constant Field Values

LZOP_COMPAT_VERSION

public static final int LZOP_COMPAT_VERSION

Latest verion of lzop this should be compatible with

See Also:

Constant Field Values

DEFAULT_LZO_EXTENSION

public static final String DEFAULT_LZO_EXTENSION

See Also:

Constant Field Values

Constructor Detail

LzopCodec

public LzopCodec()

Method Detail

createOutputStream

public org.apache.hadoop.io.compress.CompressionOutputStream createOutputStream(OutputStream out)
                                                                         throws IOException

Specified by:

createOutputStream in interface org.apache.hadoop.io.compress.CompressionCodec

Overrides:

createOutputStream in class LzoCodec

Throws:

IOException

createIndexedOutputStream

public org.apache.hadoop.io.compress.CompressionOutputStream createIndexedOutputStream(OutputStream out,
                                                                                       DataOutputStream indexOut)
                                                                                throws IOException

Throws:

IOException

createOutputStream

public org.apache.hadoop.io.compress.CompressionOutputStream createOutputStream(OutputStream out,
                                                                                org.apache.hadoop.io.compress.Compressor compressor)
                                                                         throws IOException

Specified by:

createOutputStream in interface org.apache.hadoop.io.compress.CompressionCodec

Overrides:

createOutputStream in class LzoCodec

Throws:

IOException

createIndexedOutputStream

public org.apache.hadoop.io.compress.CompressionOutputStream createIndexedOutputStream(OutputStream out,
                                                                                       DataOutputStream indexOut,
                                                                                       org.apache.hadoop.io.compress.Compressor compressor)
                                                                                throws IOException

Throws:

IOException

createInputStream

public org.apache.hadoop.io.compress.CompressionInputStream createInputStream(InputStream in,
                                                                              org.apache.hadoop.io.compress.Decompressor decompressor)
                                                                       throws IOException

Specified by:

createInputStream in interface org.apache.hadoop.io.compress.CompressionCodec

Overrides:

createInputStream in class LzoCodec

Throws:

IOException

createInputStream

public org.apache.hadoop.io.compress.CompressionInputStream createInputStream(InputStream in)
                                                                       throws IOException

Specified by:

createInputStream in interface org.apache.hadoop.io.compress.CompressionCodec

Overrides:

createInputStream in class LzoCodec

Throws:

IOException

getDecompressorType

public Class<? extends org.apache.hadoop.io.compress.Decompressor> getDecompressorType()

Specified by:

getDecompressorType in interface org.apache.hadoop.io.compress.CompressionCodec

Overrides:

getDecompressorType in class LzoCodec

createDecompressor

public org.apache.hadoop.io.compress.Decompressor createDecompressor()

Specified by:

createDecompressor in interface org.apache.hadoop.io.compress.CompressionCodec

Overrides:

createDecompressor in class LzoCodec

getDefaultExtension

public String getDefaultExtension()

Description copied from class: LzoCodec

Get the default filename extension for this kind of compression.

Specified by:

getDefaultExtension in interface org.apache.hadoop.io.compress.CompressionCodec

Overrides:

getDefaultExtension in class LzoCodec

Returns:

the extension including the '.'