In Boxfish (later acquired by AIQUDO) we had to deal with very flexible queryString inputs, requiring default values, that were optionals and that could not be easily or at all mapped to a POJO. In order to make it better, we developed the RestModel library. RestModel provides you with a map that gives you all of that in a beautiful fluent API.

1. RESTMODEL,
A HASHMAP ON STEROIDS
SIMPLIFY REST INPUT IN JAVA WITH
open source powered by

2. http://www.aiqudo.com/
voice to action
https://github.com/bxfsh

3. JSON TO JAVA
THE PROBLEM

4. THE PROBLEM: “JSON” TO “JAVA"
TWO VERY DIFFERENT WORLDS

5. THE PROBLEM: “JSON” TO “JAVA"
SOLUTION 1: SPRING (REST + JPA) 101

6. THE PROBLEM: “JSON” TO “JAVA"
SOLUTION 1: SPRING (REST + JPA) 101

7. THE PROBLEM: “JSON” TO “JAVA"
SOLUTION 1: SPRING (REST + JPA) 101

8. THE PROBLEM: “JSON” TO “JAVA"
SOLUTION 1: SPRING (REST + JPA) 101
HOW HOMAKOV HACKED GITHUB AND THE LINE OF CODE THAT COULD HAVE PREVENTED IT
HTTPS://GIST.GITHUB.COM/PETERNIXEY/1978249

9. THE PROBLEM: “JSON” TO “JAVA"
SOLUTION 1: SPRING (REST + JPA) 101
WE NEED TO SANITISE THE DATA
BEFORE WE SAVE IT!

10. ALTERNATIVES
MAPPING JSON TO JAVA

11. THE PROBLEM: “JSON” TO “JAVA"
SOLUTION 1: MAP<STRING, OBJECT>

12. THE PROBLEM: “JSON” TO “JAVA"
SOLUTION 1: MAP<STRING, OBJECT>

13. THE PROBLEM: “JSON” TO “JAVA"
SOLUTION 2: AUTO MAPPER

14. THE PROBLEM: “JSON” TO “JAVA"
SOLUTION 2: AUTO MAPPER

15. REST MODEL
MAPPING JSON TO JAVA

16. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL

17. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL
Good JSON-Serialisable error object
Chained instruction for setup
Cast-free conversions

18. RestModel
FEATURES
▸ All features from a
HashMap<String, Object>
▸ require, permit, permitAll
▸ json-friendly validation error object
▸ has, against “blank"
▸ rules
▸ type casting
▸ nested objects

19. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL permit(key) + baseline(key)

20. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL permit(key) + baseline(key)
Defaults “name" to "defaultName"
Uses whatever provided in the request body,
and uses the baseline if nothing was provided

21. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL permit(key) + has(key)

22. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL permit(key) + has(key)
has(key) checks against “blank”, not just null or empty

23. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL permitAll()

24. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL permitAll()
do no filter information, if you don’t want it

25. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL nested validation

26. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL nested validation
Validation can be performed equally in child objects

27. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL easy cast to many types and lists

28. THE PROBLEM: “JSON” TO “JAVA"
THE REST MODEL easy cast to many types and lists
Loads can be done with it.

29. RestModel
FEATURES & ADVANTAGES
▸ JSON keys normalisation (both
camelCase and snake_case
work)
▸ Simple linguistics to scrutinise
and validate input
▸ Also works with Lists and
Nested objects in the same way
▸ When validation errors are
found, provides good JSON
Serialisable Errors object
▸ It’s dependency free!
▸ Cast-free conversion of values
to (almost) all basic types.
▸ Fluent API for chained
instructions
▸ Used in production for 1 year,
1.4 released recently

30. RestModel
WANT TO HELP?
▸ It’s currently not possible to
extend the converters. We have it
to (almost all) basic types, but
registering your own ain’t possible
▸ Desired, but no way to
simply .bindTo(Entity.class) using
the require/permit rule
HTTPS://GITHUB.COM/BXFSH/BOXFISH-COMMONS-WEB-MODEL

31. RestModel
WANT TO HELP?
▸ It’s currently not possible to
extend the converters. We have it
to (almost all) basic types, but
registering your own ain’t possible
▸ Desired, but no way to
simply .bindTo(Entity.class) using
the require/permit rule
HTTPS://GITHUB.COM/BXFSH/BOXFISH-COMMONS-WEB-MODEL
MAY SOON BE RENAMED TO AIQUDO

32. TIME FOR Q&A
// HUDSON MENDES
github.com/hudsonmendes
twitter.com/hudsonmendes
medium.com/@hudsonmendes
linkedin.com/in/hudsonmendes

33. THANKS!
// HUDSON MENDES