Package org.apache.hadoop.io.compress.zlib

Enum ZlibCompressor.CompressionStrategy

java.lang.Object

java.lang.Enum<ZlibCompressor.CompressionStrategy>

org.apache.hadoop.io.compress.zlib.ZlibCompressor.CompressionStrategy

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<ZlibCompressor.CompressionStrategy>

Enclosing class:

ZlibCompressor

public static enum ZlibCompressor.CompressionStrategy
extends java.lang.Enum<ZlibCompressor.CompressionStrategy>

The compression level for zlib library.

Enum Constant Summary

Enum Constants

Enum Constant	Description
DEFAULT_STRATEGY	Default compression strategy.
FILTERED	Compression strategy best used for data consisting mostly of small values with a somewhat random distribution.
FIXED	Compression strategy to prevent the use of dynamic Huffman codes, allowing for a simpler decoder for special applications.
HUFFMAN_ONLY	Compression strategy for Huffman coding only.
RLE	Compression strategy to limit match distances to one (run-length encoding).

Method Summary

Modifier and Type	Method	Description
static ZlibCompressor.CompressionStrategy	valueOf(java.lang.String name)	Returns the enum constant of this type with the specified name.
static ZlibCompressor.CompressionStrategy[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

FILTERED

public static final ZlibCompressor.CompressionStrategy FILTERED

Compression strategy best used for data consisting mostly of small values with a somewhat random distribution. Forces more Huffman coding and less string matching.

HUFFMAN_ONLY

public static final ZlibCompressor.CompressionStrategy HUFFMAN_ONLY

Compression strategy for Huffman coding only.

RLE

public static final ZlibCompressor.CompressionStrategy RLE

Compression strategy to limit match distances to one (run-length encoding).

FIXED

public static final ZlibCompressor.CompressionStrategy FIXED

Compression strategy to prevent the use of dynamic Huffman codes, allowing for a simpler decoder for special applications.

DEFAULT_STRATEGY

public static final ZlibCompressor.CompressionStrategy DEFAULT_STRATEGY

Default compression strategy.

Method Detail

values

public static ZlibCompressor.CompressionStrategy[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ZlibCompressor.CompressionStrategy c : ZlibCompressor.CompressionStrategy.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ZlibCompressor.CompressionStrategy valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null