The Wonders of Java Annotation Processing at Compile Time
summary
Coverage of compile-time Java annotation processing for Android development, focusing on libraries and frameworks that use it—Dagger 2, Lombok, ButterKnife—and comparing compile-time code generation with reflection and runtime generation. Explains benefits and drawbacks of compile-time processing and outlines how to build a custom library to generate boilerplate code during compilation.
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chapters (14)
- 0:00Introduction
- 1:23Routine code problems
- 3:51Reflection limitations
- 8:32What is annotation processing
- 11:00How annotation processor works
- 14:54Example: automated registration
- 22:38Code generation with JavaPoet
- 30:55Processor multiple runs
- 34:29Dagger2 and annotation processing
- 37:22MapStruct data transformation
- 40:41Lombok modifying classes
- 45:01Other annotation processing tools
- 46:48Pros and cons
- 47:14Q&A
