Struct BloomBuilder 

pub struct BloomBuilder<T: AsRef<[u8]>> { /* private fields */ }

Provides a way to build a bloom filter with optional fields, such as customizing the Hasher used or the number of hash functions used in its representation. Will use a DefaultHasher if no other hasher is specified, and will use the optimal number of hash functions depending on the number of items by default.

Example

use std::io::Read;
use sha3::{Digest, Sha3_512};
use flowerbloom::{BloomBuilder, BloomFilter, Hasher};

pub struct CustomHasher {}
impl<T: AsRef<[u8]>> Hasher<T> for CustomHasher {
    fn hash(item: &T) -> u64 {
        let mut hasher = Sha3_512::new();
        hasher.update(item);
        let result = hasher.finalize();
        let mut buf = [0; 8];
        let mut handle = result.take(8);
        handle.read_exact(&mut buf).unwrap();
        u64::from_be_bytes(buf)
    }
}
let capacity: u32 = 50;
let fp_rate: f32 = 0.03;
let mut bf: BloomFilter<&str> = BloomBuilder::new(capacity, fp_rate)
    .hasher::<CustomHasher>()
    .build();
bf.insert("hello");
bf.insert("world");
let _ = bf.has("nyan");

Implementations

impl<T: AsRef<[u8]>> BloomBuilder<T>

pub fn new(capacity: u32, fp_rate: f32) -> BloomBuilder<T>

pub fn hasher<H: Hasher<T>>(self) -> BloomBuilder<T>

pub fn build(self) -> BloomFilter<T>