org.apache.lucene.util

Class Hash64

Object

Hash64

public class Hash64
extends Object

Utility class that calculates good 64-bit hash codes for strings.

Author:

Martin Haye

Field Summary

Fields

Modifier and Type	Field and Description
private static long	MAGIC_PRIME

Constructor Summary

Constructors

Constructor and Description
Hash64()

Method Summary

Modifier and Type	Method and Description
static long	hash(String s) Calculate a non-negative 64-bit hash code for a string
static long	hash(String s1, String s2) Calculate a non-negative 64-bit hash code for two strings
static long	hash(String s1, String s2, String s3) Calculate a non-negative 64-bit hash code for three strings

Methods inherited from class Object

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

Field Detail

MAGIC_PRIME

private static final long MAGIC_PRIME

See Also:

Constant Field Values

Constructor Detail

Hash64

public Hash64()

Method Detail

hash

public static long hash(String s)

Calculate a non-negative 64-bit hash code for a string

hash

public static long hash(String s1,
                        String s2)

Calculate a non-negative 64-bit hash code for two strings

hash

public static long hash(String s1,
                        String s2,
                        String s3)

Calculate a non-negative 64-bit hash code for three strings