Boiling out Boilerplate

Warsjawa 2014

Hi, I'm Maciej

• Android Developer
• @ EL Passion

What we are going to try?

• Annotation Processing API (JSR 269)
• Bytecode weaving
• AST transformations

Annotation processing

• Only creating new classes
• Small amount of reflection
  • or using generated classes directly

Annotation processing

• AndroidAnnotations
• ButterKnife
• Icepick / Memento
• Parceler / AutoParcel
• ...

Bytecode weaving

• After compilation
• Mostly injecting code into existing methods
• Depends on build tools

Bytecode weaving

• Hugo
• LogLifeCycle
• InjectView
• InjectExtra

Bytecode weaving

• stalk Stéphane Nicolas
  • https://github.com/stephanenicolas/injects
    • Mimic
    • AfterBurner
    • Morpheus
  • https://speakerdeck.com/stephanenicolas/byte-code-weaving-for-android

AST tranformations

• Most powerful
• But require support from IDE

AST transformations

• Lombok & Hrisey
• Groovy

• recruting
• agile software house
• mastery, autonomy

Let's do some exercises

and only code what is worth coding!