org.apache.iotdb.tsfile.utils

Class BloomFilter

java.lang.Object

org.apache.iotdb.tsfile.utils.BloomFilter

public class BloomFilter
extends Object

Method Summary

Modifier and Type	Method and Description
void	add(String value)
static BloomFilter	buildBloomFilter(byte[] bytes, int size, int hashFunctionSize) build bloom filter by bytes
boolean	contains(String value)
boolean	equals(Object o)
int	getBitCount()
static BloomFilter	getEmptyBloomFilter(double errorPercent, int numOfString) get empty bloom filter
int	getHashFunctionSize()
int	getSize()
int	hashCode()
byte[]	serialize()
void	setSize(int size)

Methods inherited from class java.lang.Object

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

Method Detail

getEmptyBloomFilter

public static BloomFilter getEmptyBloomFilter(double errorPercent,
                                              int numOfString)

get empty bloom filter

Parameters:

errorPercent - the tolerant percent of error of the bloom filter

numOfString - the number of string want to store in the bloom filter

Returns:

empty bloom

buildBloomFilter

public static BloomFilter buildBloomFilter(byte[] bytes,
                                           int size,
                                           int hashFunctionSize)

build bloom filter by bytes

Parameters:

bytes - bytes of bits

Returns:

bloom filter

getHashFunctionSize

public int getHashFunctionSize()

getSize

public int getSize()

setSize

public void setSize(int size)

add

public void add(String value)

contains

public boolean contains(String value)

getBitCount

public int getBitCount()

serialize

public byte[] serialize()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object