org.apache.hadoop.io.compress.zlib

枚举 ZlibCompressor.CompressionStrategy

java.lang.Object

java.lang.Enum<ZlibCompressor.CompressionStrategy>

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

所有已实现的接口:

Serializable, Comparable<ZlibCompressor.CompressionStrategy>

封闭类:

ZlibCompressor

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

The compression level for zlib library.

枚举常量概要

枚举常量

枚举常量和说明
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).

方法概要

方法

限定符和类型	方法和说明
static ZlibCompressor.CompressionStrategy	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static ZlibCompressor.CompressionStrategy[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

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

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

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.

方法详细资料

values

public static ZlibCompressor.CompressionStrategy[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

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

valueOf

public static ZlibCompressor.CompressionStrategy valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。