com.microsoft.azure.documentdb

Class MurmurHash

java.lang.Object

com.microsoft.azure.documentdb.MurmurHash

All Implemented Interfaces:

HashGenerator

public final class MurmurHash
extends Object
implements HashGenerator

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

Constructor Summary

Constructors

Constructor and Description
MurmurHash()

Method Summary

Modifier and Type	Method and Description
byte[]	computeHash(byte[] data)
static int	computeHash(byte[] data, int len, int seed) Returns the MurmurHash3_x86_32 hash.

Methods inherited from class java.lang.Object

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

Constructor Detail

MurmurHash

public MurmurHash()

Method Detail

computeHash

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

Returns the MurmurHash3_x86_32 hash.

Parameters:

data - a byte array containing the data to be hashed

len - an integer indicating the length of data

seed - an integer to be used as hash seed

Returns:

the hash value

computeHash

public byte[] computeHash(byte[] data)

Specified by:

computeHash in interface HashGenerator