bloomfilter | Bloom filters for Java | Hashing library

 by   sangupta Java Version: 0.9.0 License: Apache-2.0

kandi X-RAY | bloomfilter Summary

kandi X-RAY | bloomfilter Summary

bloomfilter is a Java library typically used in Security, Hashing, Example Codes applications. bloomfilter has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub, Maven.

bloomfilter is a pure Java Bloom Filter implementation that provides simple persistable bloom filters. The entire bloom filter is abstracted into various layers so that the same can be changed by pure plug-and-play implementations such as decomposing an object to a byte-stream, or the hash function to be used, or the serialization strategy to be used.

            kandi-support Support

              bloomfilter has a low active ecosystem.
              It has 49 star(s) with 14 fork(s). There are 3 watchers for this library.
              It had no major release in the last 12 months.
              There are 1 open issues and 1 have been closed. On average issues are closed in 80 days. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of bloomfilter is 0.9.0

            kandi-Quality Quality

              bloomfilter has 0 bugs and 0 code smells.

            kandi-Security Security

              bloomfilter has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              bloomfilter code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              bloomfilter is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              bloomfilter releases are not available. You will need to build from source code and install.
              Deployable package is available in Maven.
              Build file is available. You can build the component from source.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed bloomfilter and discovered the below as its top functions. This is intended to give you an instant insight into bloomfilter implemented functionality, and help decide if they suit your requirements.
            • Adds the given values to the bloom filter
            • Adds the given byte array to the bloom filter
            • Decodes the given value
            • Gets the byte array of data
            • Decompose an object
            • Puts the given bytes into this sink
            • Atomically set bit
            • Gets the bit at the specified index
            • Divides p by q
            • Checks rounding if necessary
            • Puts a short into the current byte stream
            • OR the bit - wise bit set
            • Puts character sequence into sink
            • Puts a char into the byte stream
            • Puts a float into the current byte stream
            • Puts a boolean into the current byte stream
            • Puts a long into the current byte stream
            • Puts an int into the output stream
            • Hashes bytes
            • Clears a bit at the specified index
            • Puts a double into the sink
            • Extend the backing file
            • Combine two BitArrays
            • Clears the bit at specified index
            • Clears the bit set
            • Clears the bit array
            Get all kandi verified functions for this library.

            bloomfilter Key Features

            No Key Features are available at this moment for bloomfilter.

            bloomfilter Examples and Code Snippets

            Javadot img1Lines of Code : 26dot img1License : Permissive (Apache-2.0)
            copy iconCopy
            // the maximum number of elements that the filter will contain
            int numberOfElements = 1000 * 1000;
            // the max false positive probability that is desired
            // the lower the value - the more will be the memory usage
            double fpp = 0.01d;
            // this creates   
            Javadot img2Lines of Code : 16dot img2License : Permissive (Apache-2.0)
            copy iconCopy
            bloomfilter: Bloom filters for Java
            Copyright (c) 2014-2018, Sandeep Gupta
            Licensed under the Apache License, Version 2.0 (the "License");
             you may not use this file except in compliance with the License.
            Javadot img3Lines of Code : 5dot img3License : Permissive (Apache-2.0)
            copy iconCopy

            Community Discussions


            How to link the bitcodes of PostgreSQL
            Asked 2022-Mar-22 at 08:54

            I want to run llvm-slicer (source) for PostgreSQL main executable file (i.e., PG_ROOT/src/backend/postgres) to carry backward slicing on PostgreSQL. llvm-slicer runs on top of bitcode (.bc file). I have compiled PostgreSQL via ./configure CC=clang-6.0 && make CC=clang-6.0, duiring which, the final compile command that link many .o files together is (very long):



            Answered 2022-Mar-22 at 08:54

            Solution: whole-program-llvm.

            It provides tools for building whole-program (or whole-library) LLVM bitcode files from an unmodified C or C++ source package. It currently runs on *nix platforms such as Linux, FreeBSD, and Mac OS X.



            how to solve cyclic-dependency & Iterator lifetime problem?
            Asked 2022-Jan-05 at 09:43

            Rustaceans. when I start to write a BloomFilter example in rust. I found I have serveral problems have to solve. I struggle to solve them but no progress in a day. I need help, any suggestion will help me a lot, Thanks.

            1. How to solve lifetime when pass a Iterator into another function?


            Answered 2022-Jan-04 at 19:41

            pub type BitsIter = Box>;

            In this case, the object in the box must be valid for the 'static lifetime. This isn't the case for the iterator returned by hash - its limited to the lifetime of self.

            Try replacing with:



            Join dataset with case class spark scala
            Asked 2021-Nov-22 at 08:18

            I am converting a dataframe into a dataset using case class which has a sequence of another case class



            Answered 2021-Nov-22 at 08:18

            You can explode your array sequence in your IpMonitor objects using explode function, then use a left outer join to match ips present in your Ips dataset, then filter out on ipType == "home" or ip is present in Ips dataset and finally rebuild your IpLocation sequence by grouping by id and collect_list.

            Complete code is as follows:



            Intersections and unions of Bloom filters in Java using the Guava library
            Asked 2021-Oct-20 at 12:10

            Bloom filters seem promising for a real-world problem I'm working on. A popular java implementation seems to be Google's guava library.

            I need to use bloom filter's union operation, and an intersection operation would be good to have, but I can work around it.

            In the java docs, I could find no method which performs intersection, while the putAll method seems to work like the union operation.

            So my questions are these:

            1. Is putAll() the correct way to get the union of two bloom filters?
            2. Is there a non-reflective way to get the intersection of two or more bloom filters?
            3. In case one is okay with reflection, can we safely perform biwise operations (or, and) on the 'data' field?

            If someone could recommend any another popular and well-tested library which is available on maven's repository,and has intersection and union, that'd also solve my needs.



            Answered 2021-Oct-20 at 12:10
            1. Is putAll() the correct way to get the union of two bloom filters?

            Yes, BloomFilter#putAll(BloomFilter) JavaDoc says:

            Combines this Bloom filter with another Bloom filter by performing a bitwise OR of the underlying data. The mutations happen to this instance. Callers must ensure the Bloom filters are appropriately sized to avoid saturating them.

            The catch is that it'll throw IllegalArgumentException - if isCompatible(that) == false, so if you want to use this method you must make sure that isCompatible returns true:

            Determines whether a given Bloom filter is compatible with this Bloom filter. For two Bloom filters to be compatible, they must:

            • not be the same instance
            • have the same number of hash functions
            • have the same bit size
            • have the same strategy
            • have equal funnels

            That said, let's try to answer the second question and find an easier solution.

            1. Is there a non-reflective way to get the intersection of two or more bloom filters?

            Yes, you can use the fact that BloomFilters implement Predicate and use its .and() and .or() methods, remembering that mightContain behavior depends on BloomFilter's parameters.




            How to Save Object of Maven Libraries Using Hibernate JPA?
            Asked 2021-Apr-22 at 07:37

            I am implementing Bloom Filter in a maven project using



            Answered 2021-Apr-22 at 07:37

            I stored them as BLOB objects.



            BloomFilter to String and back
            Asked 2020-Nov-10 at 21:09

            I want to conver BloomFilter to String, store it and then get it from String. If I do it using just byte array, without converting to String - everything is ok:



            Answered 2020-Nov-10 at 21:09

            Converting bytes to a String and back is not always reversible in any Charset. You must use a tool such as Base64 (provided in Guava as BaseEncoding.base64()) to convert a byte array to a string in such a way that you can always convert it back correctly.



            Why does adding a tokenbf_v2 index to my Clickhouse table not have any effect
            Asked 2020-Oct-11 at 14:40

            I have a large table in Clickhouse with one column called 'Route' which is a comma separated String of id's. It looks e.g. like this: 123421,25245,346263. There can be hundreds of id's in one string.

            The table is queried to select Routes that go through certain id's where the order matters, like this:



            Answered 2020-Oct-10 at 18:06

            To guarantee to apply the index to all data need to re-insert them all. I would recommend creating the test table with the required index and partially fill it. To use it as a playground to find more optimal indexes.

            Consider to use hasToken-function or others ones allowed to tokenbf_v1-index (see Skipping index: functions support):



            Cassandra Windows 10 Access Violation
            Asked 2020-Jul-29 at 02:45

            EDIT: Although yukim's workaround does work, I found that by downgrading to JDK 8u251 vs 8u261, the sigar lib works correctly.

            • Windows 10 x64 Pro
            • Cassandra 3.11.7

            NOTE: I have JDK 11.0.7 as my main JDK, so I override JAVA_HOME and PATH in the batch file for Cassandra.

            Opened admin prompt and...

            java -version



            Answered 2020-Jul-29 at 01:05

            I think it is sigar-lib that cassandra uses that is causing the problem (especially on the recent JDK8).

            It is not necessary to run cassandra, so you can comment out this line from cassandra-env.ps1 in conf directory:


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install bloomfilter

            You can download it from GitHub, Maven.
            You can use bloomfilter like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the bloomfilter component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer For Gradle installation, please refer .


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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