This repository contains implementations of a collection of set filter data structures, also commonly referred to as approximate membership query data structures. We will use the pronoun "Setfilters" to refer to the library.

Setfilters' Maven group ID is com.google.setfilters, and its artifact id is setfilters. To add dependency using Maven, add the following lines to your project's pom.xml:

<dependency>
  <groupId>com.google.setfilters</groupId>
  <artifactId>setfilters</artifactId>
  <version>1.0.0</version>
</dependency>

Cuckoo filter is a space efficient, approximate membershp query data structure that supports insertions and deletions. False positives are allowed (e.g. a non-member element may incorrectly be labeled as a member), but false negatives are not. The code for the cuckoo filter is located in setfilters/src/com/google/setfilters/cuckoofilter/ directory. For example code on how to use the library, please see examples/cuckoofilter/.

This is not an officially supported Google product.