Package com.alibaba.druid.util

Class FnvHash

java.lang.Object

com.alibaba.druid.util.FnvHash

public final class FnvHash
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	FnvHash.Constants

Field Summary

Fields

Modifier and Type	Field	Description
static long	BASIC
static long	PRIME

Constructor Summary

Constructors

Constructor	Description
FnvHash()

Method Summary

Modifier and Type	Method	Description
static long	fnv_32_lower(String key)
static long	fnv1a_64(byte[] input, int offset, int end)
static long	fnv1a_64(char[] chars)
static long	fnv1a_64(String input)
static long	fnv1a_64(StringBuilder input)
static long	fnv1a_64(String input, int offset, int end)
static long	fnv1a_64_lower(long basic, StringBuilder key)
static long	fnv1a_64_lower(String key)
static long[]	fnv1a_64_lower(String[] strings, boolean sort)
static long	fnv1a_64_lower(StringBuilder key)
static long	hashCode64(long basic, String name)
static long	hashCode64(long basic, String key, int offset, int end)
static long	hashCode64(String name)	lower and normalized and fnv_1a_64
static long	hashCode64(String key, int offset, int end)
static long	hashCode64(String owner, String name)	normalized and lower and fnv1a_64_hash

Methods inherited from class java.lang.Object

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

Field Detail

BASIC

public static final long BASIC

See Also:

Constant Field Values

PRIME

public static final long PRIME

See Also:

Constant Field Values

Constructor Detail

FnvHash

public FnvHash()

Method Detail

fnv1a_64

public static long fnv1a_64(String input)

fnv1a_64

public static long fnv1a_64(StringBuilder input)

fnv1a_64

public static long fnv1a_64(String input,
                            int offset,
                            int end)

fnv1a_64

public static long fnv1a_64(byte[] input,
                            int offset,
                            int end)

fnv1a_64

public static long fnv1a_64(char[] chars)

hashCode64

public static long hashCode64(String name)

lower and normalized and fnv_1a_64

Parameters:

name - the string to calculate the hash code for

Returns:

the 64-bit hash code of the string

fnv1a_64_lower

public static long fnv1a_64_lower(String key)

fnv1a_64_lower

public static long fnv1a_64_lower(StringBuilder key)

fnv1a_64_lower

public static long fnv1a_64_lower(long basic,
                                  StringBuilder key)

hashCode64

public static long hashCode64(String key,
                              int offset,
                              int end)

hashCode64

public static long hashCode64(long basic,
                              String name)

hashCode64

public static long hashCode64(long basic,
                              String key,
                              int offset,
                              int end)

fnv_32_lower

public static long fnv_32_lower(String key)

fnv1a_64_lower

public static long[] fnv1a_64_lower(String[] strings,
                                    boolean sort)

hashCode64

public static long hashCode64(String owner,
                              String name)

normalized and lower and fnv1a_64_hash

Parameters:

owner - the owner string to include in the hash code calculation (can be null)

name - the name string to include in the hash code calculation (can be null)

Returns:

the 64-bit hash code calculated from the owner and name strings