de.hybris.platform.util

Class MurmurHash

java.lang.Object

de.hybris.platform.util.MurmurHash

public final class MurmurHash
extends java.lang.Object

MurmurHash java implementation from http://d3s.mff.cuni.cz/~holub/sw/javamurmurhash/

Constructor Summary

Constructors

Constructor and Description
MurmurHash()

Method Summary

Modifier and Type	Method and Description
static int	hash32(byte[] data, int length) Generates 32 bit hash from byte array with default seed value.
static int	hash32(byte[] data, int length, int seed) Generates 32 bit hash from byte array of the given length and seed.
static int	hash32(java.lang.String text) Generates 32 bit hash from a string.
static int	hash32(java.lang.String text, int from, int length) Generates 32 bit hash from a substring.
static long	hash64(byte[] data, int length) Generates 64 bit hash from byte array with default seed value.
static long	hash64(byte[] data, int length, int seed) Generates 64 bit hash from byte array of the given length and seed.
static long	hash64(java.lang.String text) Generates 64 bit hash from a string.
static long	hash64(java.lang.String text, int from, int length) Generates 64 bit hash from a substring.

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

hash32

public static int hash32(byte[] data,
                         int length,
                         int seed)

Generates 32 bit hash from byte array of the given length and seed.

Parameters:

data - byte array to hash

length - length of the array to hash

seed - initial seed value

Returns:

32 bit hash of the given array

hash32

public static int hash32(byte[] data,
                         int length)

Generates 32 bit hash from byte array with default seed value.

Parameters:

data - byte array to hash

length - length of the array to hash

Returns:

32 bit hash of the given array

hash32

public static int hash32(java.lang.String text)

Generates 32 bit hash from a string.

Parameters:

text - string to hash

Returns:

32 bit hash of the given string

hash32

public static int hash32(java.lang.String text,
                         int from,
                         int length)

Generates 32 bit hash from a substring.

Parameters:

text - string to hash

from - starting index

length - length of the substring to hash

Returns:

32 bit hash of the given string

hash64

public static long hash64(byte[] data,
                          int length,
                          int seed)

Generates 64 bit hash from byte array of the given length and seed.

Parameters:

data - byte array to hash

length - length of the array to hash

seed - initial seed value

Returns:

64 bit hash of the given array

hash64

public static long hash64(byte[] data,
                          int length)

Generates 64 bit hash from byte array with default seed value.

Parameters:

data - byte array to hash

length - length of the array to hash

Returns:

64 bit hash of the given string

hash64

public static long hash64(java.lang.String text)

Generates 64 bit hash from a string.

Parameters:

text - string to hash

Returns:

64 bit hash of the given string

hash64

public static long hash64(java.lang.String text,
                          int from,
                          int length)

Generates 64 bit hash from a substring.

Parameters:

text - string to hash

from - starting index

length - length of the substring to hash

Returns:

64 bit hash of the given array