Apache Tapestry has a library called Plastic that serves the same purpose and is also built on top of ASM. Plastic helps Tapestry handle a lot of the boilerplate and ceremony with common Java patterns (decorators, chains, handler pipelines, etc), and can be used as an independent library.
Here's one blog post on it: http://tapestryjava.blogspot.com/2012/02/plastic-advanced-ex...