org.rocksdb

枚举 CompressionType

java.lang.Object

java.lang.Enum<CompressionType>

org.rocksdb.CompressionType

所有已实现的接口:

java.io.Serializable, java.lang.Comparable<CompressionType>

public enum CompressionType
extends java.lang.Enum<CompressionType>

Enum CompressionType

DB contents are stored in a set of blocks, each of which holds a sequence of key,value pairs. Each block may be compressed before being stored in a file. The following enum describes which compression method (if any) is used to compress a block.

枚举常量概要

枚举常量

枚举常量和说明
BZLIB2_COMPRESSION
DISABLE_COMPRESSION_OPTION
LZ4_COMPRESSION
LZ4HC_COMPRESSION
NO_COMPRESSION
SNAPPY_COMPRESSION
XPRESS_COMPRESSION
ZLIB_COMPRESSION
ZSTD_COMPRESSION

方法概要

限定符和类型	方法和说明
static CompressionType	getCompressionType(byte byteIdentifier) Get the CompressionType enumeration value by passing the byte identifier to this method.
static CompressionType	getCompressionType(java.lang.String libraryName) Get the CompressionType enumeration value by passing the library name to this method.
java.lang.String	getLibraryName() Returns the library name of the compression type identified by the enumeration value.
byte	getValue() Returns the byte value of the enumerations value.
static CompressionType	valueOf(java.lang.String name) 返回带有指定名称的该类型的枚举常量。
static CompressionType[]	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

NO_COMPRESSION

public static final CompressionType NO_COMPRESSION

SNAPPY_COMPRESSION

public static final CompressionType SNAPPY_COMPRESSION

ZLIB_COMPRESSION

public static final CompressionType ZLIB_COMPRESSION

BZLIB2_COMPRESSION

public static final CompressionType BZLIB2_COMPRESSION

LZ4_COMPRESSION

public static final CompressionType LZ4_COMPRESSION

LZ4HC_COMPRESSION

public static final CompressionType LZ4HC_COMPRESSION

XPRESS_COMPRESSION

public static final CompressionType XPRESS_COMPRESSION

ZSTD_COMPRESSION

public static final CompressionType ZSTD_COMPRESSION

DISABLE_COMPRESSION_OPTION

public static final CompressionType DISABLE_COMPRESSION_OPTION

方法详细资料

values

public static CompressionType[] 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 (CompressionType c : CompressionType.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static CompressionType valueOf(java.lang.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。

返回:

返回带有指定名称的枚举常量

抛出:

java.lang.IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

java.lang.NullPointerException - 如果参数为空值

getCompressionType

public static CompressionType getCompressionType(java.lang.String libraryName)

Get the CompressionType enumeration value by passing the library name to this method.

If library cannot be found the enumeration value NO_COMPRESSION will be returned.

参数:

libraryName - compression library name.

返回:

CompressionType instance.

getCompressionType

public static CompressionType getCompressionType(byte byteIdentifier)

Get the CompressionType enumeration value by passing the byte identifier to this method.

参数:

byteIdentifier - of CompressionType.

返回:

CompressionType instance.

抛出:

java.lang.IllegalArgumentException - If CompressionType cannot be found for the provided byteIdentifier

getValue

public byte getValue()

Returns the byte value of the enumerations value.

返回:

byte representation

getLibraryName

public java.lang.String getLibraryName()

Returns the library name of the compression type identified by the enumeration value.

返回:

library name