07 March 2011

Custom AST transformations with Project Lombok

Custom AST transformations with Project Lombok describes an interesting hybrid between practices such as build-time code generation and runtime bytecode enhancement. Probably wouldn't use it in production myself but interesting nonetheless.

...Lombok doesn't just generate Java sources or bytecode: it transforms the Abstract Syntax Tree (AST), by modifying its structure at compile-time...

...By modifying (or transforming) the AST, Lombok keeps your source code trim and free of bloat, unlike plain-text code-generation. Lombok's generated code is also visible to classes within the same compilation unit, unlike direct bytecode manipulation with libraries like CGLib or ASM...

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