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FastClasspathScanner

FastClasspathScanner is an uber-fast, ultra-lightweight classpath scanner for Java, Scala and other JVM languages. FastClasspathScanner has been carefully optimized. The project is stable and actively maintained.

What is classpath scanning? Classpath scanning involves scanning directories and jar/zip files on the classpath to find files (especially classfiles) that meet certain criteria. In many ways, classpath scanning offers the inverse of the Java class API and/or reflection: for example, the Java class API can tell you the superclass of a given class, or give you the list of annotations on a class; classpath scanning can find all subclasses of a given class, or find all classes that are annotated with a given annotation.

FastClasspathScanner is able to:

Class graph visualization

Status

FastClasspathScanner is stable, feature complete, optimized, and (at time of writing) has no known bugs, although there are some feature requests, e.g. adding Java 9 support. Every effort is made to fix bugs quickly when they are reported.

Build Status

Documentation

Wiki

See the wiki for full documentation.

JavaDoc

JavaDoc for the core classes:

Mailing List

Feel free to subscribe to the FastClasspathScanner-Users email list for updates, or to ask questions.

Downloading

Maven dependency

<dependency>
    <groupId>io.github.lukehutch</groupId>
    <artifactId>fast-classpath-scanner</artifactId>
    <version>LATEST</version>
</dependency>

Pre-built JARs

You can get pre-built JARs (usable in JRE 1.7 or later) from Sonatype.

Building from source

The following commands will build the most recent version of FastClasspathScanner from git master. The compiled package will then be in the "fast-classpath-scanner/target" directory.

git clone https://github.com/lukehutch/fast-classpath-scanner.git
cd fast-classpath-scanner
export JAVA_HOME=/usr/java/default   # Or similar -- Maven needs JAVA_HOME
mvn -Dmaven.test.skip=true package

License

The MIT License (MIT)

Copyright (c) 2016 Luke Hutchison

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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Uber-fast, ultra-lightweight Java classpath scanner.

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