redis.clients.util
Class MurmurHash
java.lang.Object
redis.clients.util.MurmurHash
- All Implemented Interfaces:
- Hashing
public class MurmurHash
- extends Object
- implements Hashing
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).
Method Summary |
long |
hash(byte[] key)
|
static int |
hash(byte[] data,
int seed)
Hashes bytes in an array. |
static int |
hash(byte[] data,
int offset,
int length,
int seed)
Hashes bytes in part of an array. |
static int |
hash(ByteBuffer buf,
int seed)
Hashes the bytes in a buffer from the current position to the limit. |
long |
hash(String key)
|
static long |
hash64A(byte[] data,
int seed)
|
static long |
hash64A(byte[] data,
int offset,
int length,
int seed)
|
static long |
hash64A(ByteBuffer buf,
int seed)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
MurmurHash
public MurmurHash()
hash
public static int hash(byte[] data,
int seed)
- Hashes bytes in an array.
- Parameters:
data
- The bytes to hash.seed
- The seed for the hash.
- Returns:
- The 32 bit hash of the bytes in question.
hash
public static int hash(byte[] data,
int offset,
int length,
int seed)
- Hashes bytes in part of an array.
- Parameters:
data
- The data to hash.offset
- Where to start munging.length
- How many bytes to process.seed
- The seed to start with.
- Returns:
- The 32-bit hash of the data in question.
hash
public static int hash(ByteBuffer buf,
int seed)
- Hashes the bytes in a buffer from the current position to the limit.
- Parameters:
buf
- The bytes to hash.seed
- The seed for the hash.
- Returns:
- The 32 bit murmur hash of the bytes in the buffer.
hash64A
public static long hash64A(byte[] data,
int seed)
hash64A
public static long hash64A(byte[] data,
int offset,
int length,
int seed)
hash64A
public static long hash64A(ByteBuffer buf,
int seed)
hash
public long hash(byte[] key)
- Specified by:
hash
in interface Hashing
hash
public long hash(String key)
- Specified by:
hash
in interface Hashing
Copyright © 2012. All Rights Reserved.