Domino Jackson 
A type safe bidirectional JSON mappers generator for Java developers that also works on the browser, utilizing Java annotation processor and provides a large set of customizations over how you represent your data.
Mappers generation
Java annotation processors based JSON mappers generation at build time, providing early feedback and competing JSON parsing and writing speed.
Rich data-types
Your data isnt just primitives and arrays, use a large set of data types, collections, composition and inheritance to represent you application data.
Shared mappers
Share and reuse the generated mappers between frontend and backend code base and avoid duplication of your beans or mappers and write normal java unit tests to test your code.