![]() * copies of the Software, and to permit persons to whom the Software is * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * in the Software without restriction, including without limitation the rights * of this software and associated documentation files (the "Software"), to deal ![]() * Permission is hereby granted, free of charge, to any person obtaining a copy * Copyright (C) 2013-2018 The Project Lombok Authors. We write lots of these, for example when working with JPA or serialization frameworks such as JAXB or Jackson.IntroductionHere is the source code for .java Java Beans are serializable classes that have a default zero-args constructor (and possibly other versions) and expose their state via getters and setters, typically backed by private fields. Many of the Java tools and frameworks we use rely on the Bean Pattern. In these early stages, Lombok helps me move faster by not needing to move around or transform the boilerplate code it generates for me. When I’m starting a project and thinking of a domain model, I tend to begin by writing classes that are very much a work in progress and that I change iteratively as I think further and refine them.I find my Lombok annotated classes very expressive and I generally find annotated code to be quite intention-revealing, though not everyone on the internet necessarily agrees. Lombok helps keep my code clean, concise, and to the point.I have been happily using it for production projects for many years now.īefore going into details, I’d like to summarize the two reasons I especially value the use of Lombok in my projects: That is understandable, but in my experience, Lombok’s productivity benefits outweigh any of these concerns. Still, there are developers who consider it to be a hack and do not use Lombok for this reason. ![]() While I would myself agree with this characterization to some extent, rather than viewing this in the bad sense of the word, I would view Lombok as a “clever, technically meritorious, and original alternative.” This unusual, and rather intrusive, approach has traditionally resulted in Lombok being viewed as somewhat of a hack. By modifying the compiler’s AST, Lombok is indirectly altering the final bytecode generation itself. Lombok does not really fall into these categories: What it does is modify the compiler data structures used to represent the code i.e., its abstract syntax tree (AST). Maybe the most common case for annotation processors is to generate new source files or perform some kind of compile-time checks. Then, as the compile process is going on, whenever the compiler finds an annotation it sort of asks: “Hey, anybody in the classpath interested in this For those processors raising their hands, the compiler then transfers control to them along with compile context for them to, well… process. ![]() The idea is that users can put annotation processors (written by oneself, or via third-party dependencies, like Lombok) into the build classpath. Annotation processing is a feature added to the Java compiler at version 5. Lombok acts as an annotation processor that “adds” code to your classes at compile time. Let’s see how Lombok does its magic and some usage examples. ![]() Lombok’s creators are a couple of very smart guys, and certainly have a taste for humor-you cannot miss this intro they made at a past conference! It enables us to drastically reduce the amount of “boilerplate” code we need to write. Add some constructs and class patterns we Java developers often need to use and we frequently end up with many lines of code that bring little or no real value other than complying with some set of constraints or framework conventions. However, as a programming language, Java has some idiosyncrasies of its own as well as design choices that can make it rather verbose. Java is mature and performant, and the community and ecosystem around it are huge and lively. Java has many things going for it beyond just the JVM itself, which is a remarkable piece of software. ![]()
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