Class XxHashFunction

java.lang.Object

cloud.opencode.base.hash.function.AbstractHashFunction

cloud.opencode.base.hash.function.XxHashFunction

All Implemented Interfaces:

HashFunction

public final class XxHashFunction
extends AbstractHashFunction

xxHash64 hash function implementation xxHash64 哈希函数实现

xxHash is an extremely fast non-cryptographic hash algorithm, working at speeds close to RAM limits.

xxHash 是一种极快的非加密哈希算法，工作速度接近 RAM 限制。

Features | 主要功能:

• 64-bit output - 64位输出
• Extremely high performance - 极高性能
• Good distribution - 良好的分布
• Configurable seed - 可配置种子

Usage Examples | 使用示例:

HashCode hash = XxHashFunction.xxHash64().hashUtf8("Hello World");
long value = hash.asLong();

Security | 安全性:

• Thread-safe: Yes - 线程安全: 是
• Not for cryptographic use - 不用于加密用途

Performance | 性能特性:

• Time complexity: O(n) where n = input size - O(n), n为输入大小
• Space complexity: O(1) - O(1)

Since:

JDK 25, opencode-base-hash V1.0.0

Author:

Leon Soo www.LeonSoo.com

See Also:

• OpenCode.cloud

Nested Class Summary

Nested classes/interfaces inherited from class AbstractHashFunction

AbstractHashFunction.AbstractHasher, AbstractHashFunction.BufferedHasher

Field Summary

Fields inherited from class AbstractHashFunction

bits, name

Method Summary

Modifier and Type	Method	Description
HashCode	hashBytes(byte[] input, int offset, int length)	Computes hash of a byte array portion 计算字节数组部分的哈希
Hasher	newHasher()	Creates a new Hasher instance for streaming hash computation 创建新的Hasher实例用于流式哈希计算
static XxHashFunction	xxHash64()	Creates an xxHash64 function with default seed (0) 使用默认种子（0）创建xxHash64函数
static XxHashFunction	xxHash64(long seed)	Creates an xxHash64 function with specified seed 使用指定种子创建xxHash64函数

Methods inherited from class AbstractHashFunction

bits, hashBytes, hashInt, hashLong, hashObject, name, newHasher, toString

Methods inherited from class Object

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

Methods inherited from interface HashFunction

hashFile, hashInputStream, hashString, hashUtf8

Method Details

xxHash64

public static XxHashFunction xxHash64()

Creates an xxHash64 function with default seed (0) 使用默认种子（0）创建xxHash64函数

Returns:

hash function | 哈希函数

xxHash64

public static XxHashFunction xxHash64(long seed)

Creates an xxHash64 function with specified seed 使用指定种子创建xxHash64函数

Parameters:

seed - seed value | 种子值

Returns:

hash function | 哈希函数

newHasher

public Hasher newHasher()

Description copied from interface: HashFunction

Creates a new Hasher instance for streaming hash computation 创建新的Hasher实例用于流式哈希计算

Returns:

a new Hasher (stateful, not thread-safe) | 新的Hasher（有状态，非线程安全）

hashBytes

public HashCode hashBytes(byte[] input,
 int offset,
 int length)

Description copied from interface: HashFunction

Computes hash of a byte array portion 计算字节数组部分的哈希

Parameters:

input - input bytes | 输入字节

offset - starting offset | 起始偏移

length - number of bytes to hash | 要哈希的字节数

Returns:

hash code | 哈希码