cn.hutool.bloomfilter.filter

Class FuncFilter

java.lang.Object

cn.hutool.bloomfilter.filter.AbstractFilter

cn.hutool.bloomfilter.filter.FuncFilter

All Implemented Interfaces:

BloomFilter, Serializable

Direct Known Subclasses:

DefaultFilter, ELFFilter, FNVFilter, HfFilter, HfIpFilter, JSFilter, PJWFilter, RSFilter, SDBMFilter, TianlFilter

public class FuncFilter
extends AbstractFilter

基于Hash函数方法的BloomFilter

Since:

5.8.0

Author:

looly

See Also:

Serialized Form

Field Summary

Fields inherited from class cn.hutool.bloomfilter.filter.AbstractFilter

DEFAULT_MACHINE_NUM, size

Constructor Summary

Constructors

Constructor and Description
FuncFilter(long maxValue, Function<String,Number> hashFunc) 构造
FuncFilter(long maxValue, int machineNum, Function<String,Number> hashFunc)

Method Summary

Modifier and Type	Method and Description
long	hash(String str) 自定义Hash方法

Methods inherited from class cn.hutool.bloomfilter.filter.AbstractFilter

add, contains, init

Methods inherited from class java.lang.Object

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

Constructor Detail

FuncFilter

public FuncFilter(long maxValue,
                  Function<String,Number> hashFunc)

构造

Parameters:

maxValue - 最大值

hashFunc - Hash函数

FuncFilter

public FuncFilter(long maxValue,
                  int machineNum,
                  Function<String,Number> hashFunc)

Parameters:

maxValue - 最大值

machineNum - 机器位数

hashFunc - Hash函数

Method Detail

hash

public long hash(String str)

Description copied from class: AbstractFilter

自定义Hash方法

Specified by:

hash in class AbstractFilter

Parameters:

str - 字符串

Returns:

HashCode