net.wicp.tams.commons.apiext

类 MurmurHash3

java.lang.Object

net.wicp.tams.commons.apiext.MurmurHash3

public final class MurmurHash3
extends Object

The MurmurHash3 algorithm was created by Austin Appleby and placed in the public domain. This java port was authored by Yonik Seeley and also placed into the public domain. The author hereby disclaims copyright to this source code.

This produces exactly the same hash values as the final C++ version of MurmurHash3 and is thus suitable for producing the same hash values across platforms.

The 32 bit x86 version of this hash should be the fastest variant for relatively short keys like ids. murmurhash3_x64_128 is a good choice for longer strings or if you need more than 32 bits of hash.

Note - The x86 and x64 versions do _not_ produce the same results, as the algorithms are optimized for their respective platforms.

See http://github.com/yonik/java_util for future updates to this file.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	MurmurHash3.LongPair 128 bits of state

构造器概要

构造器

构造器和说明
MurmurHash3()

方法概要

方法

限定符和类型	方法和说明
static int	fmix32(int h)
static long	fmix64(long k)
static long	getLongLittleEndian(byte[] buf, int offset)
static void	murmurhash3_x64_128(byte[] key, int offset, int len, int seed, MurmurHash3.LongPair out)
static int	murmurhash3_x86_32(byte[] data, int offset, int len, int seed)
static int	murmurhash3_x86_32(CharSequence data, int offset, int len, int seed)

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

MurmurHash3

public MurmurHash3()

方法详细资料

fmix32

public static final int fmix32(int h)

fmix64

public static final long fmix64(long k)

getLongLittleEndian

public static final long getLongLittleEndian(byte[] buf,
                       int offset)

murmurhash3_x86_32

public static int murmurhash3_x86_32(byte[] data,
                     int offset,
                     int len,
                     int seed)

murmurhash3_x86_32

public static int murmurhash3_x86_32(CharSequence data,
                     int offset,
                     int len,
                     int seed)

murmurhash3_x64_128

public static void murmurhash3_x64_128(byte[] key,
                       int offset,
                       int len,
                       int seed,
                       MurmurHash3.LongPair out)