org.apache.hadoop.util.hash

类 MurmurHash

java.lang.Object

org.apache.hadoop.util.hash.Hash

org.apache.hadoop.util.hash.MurmurHash

public class MurmurHash
extends Hash

This is a very fast, non-cryptographic hash suitable for general hash-based lookup. See http://murmurhash.googlepages.com/ for more details.

The C version of MurmurHash 2.0 found at that site was ported to Java by Andrzej Bialecki (ab at getopt org).

字段概要

从类继承的字段 org.apache.hadoop.util.hash.Hash

INVALID_HASH, JENKINS_HASH, MURMUR_HASH

构造器概要

构造器

构造器和说明
MurmurHash()

方法概要

方法

限定符和类型	方法和说明
static Hash	getInstance()
int	hash(byte[] data, int length, int seed) Calculate a hash using bytes from 0 to length, and the provided seed value

从类继承的方法 org.apache.hadoop.util.hash.Hash

getHashType, getInstance, getInstance, hash, hash, parseHashType

从类继承的方法 java.lang.Object

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

构造器详细资料

MurmurHash

public MurmurHash()

方法详细资料

getInstance

public static Hash getInstance()

hash

public int hash(byte[] data,
       int length,
       int seed)

从类复制的说明: Hash

Calculate a hash using bytes from 0 to length, and the provided seed value

指定者:

hash 在类中 Hash

参数:

data - input bytes

length - length of the valid bytes to consider

seed - seed value

返回:

hash value