com.bigdata.io.compression

Class CompressorRegistry

java.lang.Object

com.bigdata.io.compression.CompressorRegistry

public class CompressorRegistry
extends Object

Registration pattern for IRecordCompressor implementations.

Author:

Martyn Cutcher

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFLATE_BEST_COMPRESSION Key for Deflater compression with BEST COMPRESSION.
static String	DEFLATE_BEST_SPEED Key for Deflater compression with BEST SPEED.
static String	GZIP Key for GZIP compression.
static String	NOP Key for no compression.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(String key, IRecordCompressor compressor) Global hook to allow customized compression strategies
IRecordCompressor	get(String key) Return the IRecordCompressor registered under that key (if any).
static CompressorRegistry	getInstance()

Methods inherited from class java.lang.Object

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

Field Detail

DEFLATE_BEST_SPEED

public static final String DEFLATE_BEST_SPEED

Key for Deflater compression with BEST SPEED.

See Also:

RecordCompressor, Constant Field Values

DEFLATE_BEST_COMPRESSION

public static final String DEFLATE_BEST_COMPRESSION

Key for Deflater compression with BEST COMPRESSION.

See Also:

RecordCompressor, Constant Field Values

GZIP

public static final String GZIP

Key for GZIP compression.

See Also:

GZipCompressor, Constant Field Values

NOP

public static final String NOP

Key for no compression.

Note: null is more efficient than the NOPRecordCompressor since it avoids all copy for all IRecordCompressor methods.

See Also:

NOPRecordCompressor, Constant Field Values

Method Detail

getInstance

public static CompressorRegistry getInstance()

add

public void add(String key,
       IRecordCompressor compressor)

Global hook to allow customized compression strategies

Parameters:

key -

compressor -

get

public IRecordCompressor get(String key)

Return the IRecordCompressor registered under that key (if any).

Parameters:

key - The key (optional - may be null).

Returns:

The IRecordCompressor -or- null if the key is null or if there is nothing registered under that key.