org.infinispan.util.hash
Class MurmurHash2

java.lang.Object
  extended by org.infinispan.util.hash.MurmurHash2
All Implemented Interfaces:
Hash

public class MurmurHash2
extends Object
implements Hash

An implementation of Austin Appleby's MurmurHash2.0 algorithm, as documented on his website.

This implementation is based on the slower, endian-neutral version of the algorithm as documented on the site, ported from Austin Appleby's original C++ version MurmurHashNeutral2.cpp.

Other implementations are documented on Wikipedia's MurmurHash page.

Version:
4.1
Author:
Manik Surtani
See Also:
MurmurHash website, MurmurHash entry on Wikipedia, MurmurHash2Compat

Constructor Summary
MurmurHash2()
           
 
Method Summary
 int hash(byte[] payload)
          Hashes a byte array efficiently.
 int hash(int hashcode)
          An incremental version of the hash function, that spreads a pre-calculated hash code, such as one derived from Object.hashCode().
 int hash(Object o)
          A helper that calculates the hashcode of an object, choosing the optimal mechanism of hash calculation after considering the type of the object (byte array, String or Object).
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

MurmurHash2

public MurmurHash2()
Method Detail

hash

public final int hash(byte[] payload)
Description copied from interface: Hash
Hashes a byte array efficiently.

Specified by:
hash in interface Hash
Parameters:
payload - a byte array to hash
Returns:
a hash code for the byte array

hash

public final int hash(int hashcode)
Description copied from interface: Hash
An incremental version of the hash function, that spreads a pre-calculated hash code, such as one derived from Object.hashCode().

Specified by:
hash in interface Hash
Parameters:
hashcode - an object's hashcode
Returns:
a spread and hashed version of the hashcode

hash

public final int hash(Object o)
Description copied from interface: Hash
A helper that calculates the hashcode of an object, choosing the optimal mechanism of hash calculation after considering the type of the object (byte array, String or Object).

Specified by:
hash in interface Hash
Parameters:
o - object to hash
Returns:
a hashcode

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