Editing AspectJ (section)

==History and contributors==
[[Gregor Kiczales]] started and led the [[Xerox PARC]] team that eventually developed AspectJ. He coined the term ''crosscutting''. Fourth on the team, [[Chris Maeda]] coined the term ''aspect-oriented programming.'' [[Jim Hugunin]] and [[Erik Hilsdale]] ([[Xerox PARC]] team members 12 and 13) were the original compiler and weaver engineers, [[Mik Kersten]] implemented the IDE integration and started the [http://eclipse.org/ajdt Eclipse AJDT] project with [[Adrian Colyer]] and [[Andrew Clement]]. After Adrian Colyer, Andrew Clement took over as project lead and main contributor for AspectJ. AJDT has since been retired as a separate project and taken over into the Eclipse AspectJ umbrella project to streamline maintenance. However, both AspectJ and AJDT are still maintained in separate source repositories.

In 2021, [[Alexander Kriegisch]] joined the project, first as a contributor, then as a committer and maintainer. Since March 2021, he is basically the sole maintainer. Since 2024, he also is formally the AspectJ and AJDT project lead.

The [[AspectBench Compiler]] was developed and is maintained as a joint effort of the [[Programming Tools Group]] at the [[Oxford University Computing Laboratory]], the [[Sable Research Group]] at [[McGill University]], and the Institute for [[BRICS Institute|Basic Research in Computer Science (BRICS)]].

===AspectWerkz===
AspectWerkz was a dynamic, lightweight and high-performance [[Aspect-oriented programming|AOP/AOSD]] framework for [[Java (programming language)|Java]]. It has been merged with the AspectJ project,<ref>{{Cite web |date=2006-07-12 |title=AspectJ and AspectWerkz to Join Forces |url=http://aspectwerkz.codehaus.org/index-merge.html|url-status=dead|archive-url=https://web.archive.org/web/20060712004603/http://aspectwerkz.codehaus.org/index-merge.html |access-date=2024-03-19 |website=Aspectwerkz|archive-date=July 12, 2006}}</ref> which supports AspectWerkz functionality since AspectJ 5.

[[Jonas Boner]] and [[Alex Vasseur]] engineered the AspectWerkz project, and later contributed to the AspectJ project when it merged in the AspectWerkz annotation style and load-time weaving support.

Unlike AspectJ prior to version 5, AspectWerkz did not add any new language constructs to Java, but instead supported declaration of aspects within [[Java annotation]]s. It utilizes bytecode modification to [[Aspect weaver|weave]] classes at project build-time, class load time, as well as [[Run time (program lifecycle phase)|runtime]]. It uses standardized {{clarify span|JVM level APIs|date=September 2013}}. Aspects can be defined using either Java annotations (introduced with Java 5), Java 1.3/1.4 custom [[doclet]] or a simple XML definition file.

AspectWerkz provides an API to use the very same aspects for proxies, hence providing a transparent experience, allowing a smooth transition for users familiar with proxies.

AspectWerkz is [[free software]]. The [[GNU Lesser General Public License|LGPL]]-style license allows the use of AspectWerkz 2.0 in both commercial and open source projects.