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com.googlecode.javaewah:JavaEWAH (1.2.3)

Published 2026-09-15 10:08:56 +00:00 by Vlad_Savchuk

Installation

Set up this registry in your project pom.xml file:

<repositories>
	<repository>
		<id>gitea</id>
		<url>https://git.expertdwh.ru/api/packages/EWH/maven</url>
	</repository>
</repositories>

<distributionManagement>
	<repository>
		<id>gitea</id>
		<url>https://git.expertdwh.ru/api/packages/EWH/maven</url>
	</repository>

	<snapshotRepository>
		<id>gitea</id>
		<url>https://git.expertdwh.ru/api/packages/EWH/maven</url>
	</snapshotRepository>
</distributionManagement>

To use the package, include the following in the dependencies block in the pom.xml file:

<dependency>
	<groupId>com.googlecode.javaewah</groupId>
	<artifactId>JavaEWAH</artifactId>
	<version>1.2.3</version>
</dependency>

Run via command line:

mvn install

To download the dependency, run via command line:

mvn dependency:get -DremoteRepositories=https://git.expertdwh.ru/api/packages/EWH/maven -Dartifact=com.googlecode.javaewah:JavaEWAH:1.2.3

For more information on the Maven registry, see the documentation.

About this package

The bit array data structure is implemented in Java as the BitSet class. Unfortunately, this fails to scale without compression. JavaEWAH is a word-aligned compressed variant of the Java bitset class. It uses a 64-bit run-length encoding (RLE) compression scheme. The goal of word-aligned compression is not to achieve the best compression, but rather to improve query processing time. Hence, we try to save CPU cycles, maybe at the expense of storage. However, the EWAH scheme we implemented is always more efficient storage-wise than an uncompressed bitmap (implemented in Java as the BitSet class). Unlike some alternatives, javaewah does not rely on a patented scheme.

Dependencies

junit:junit

4.13.1

Details

Maven

2026-09-15 10:08:56 +00:00

275

JavaEWAH

Project Site

Apache 2

173 KiB

Assets (2)

JavaEWAH-1.2.3.jar 167 KiB

JavaEWAH-1.2.3.pom 6.0 KiB

Versions (1) View all

1.2.3 2026-09-15