Jackson-Hibernate-Annotation-Migrator

Script to switch Jackson annotations to field getters/setters for Java Hibernate entities

Introduction

• Having JacksonAnnotations preceding variable declarations assists with readability when creating an entity
• Having them precede variable getter/setter definitions allows us to annotate a getter and setter differently
• The EAM automatically migrates JacksonAnnotations from variable declarations to variable getters/setters!
• Verified functional for Hibernate annotations v4.3.x

Featuring Python's powerful string-parsing capabilities, the EAM does the following:

• Switches positions of JacksonAnnotations and HibernateAnnotations
• If @JsonIgnore in Getter, add @JsonDeserialize to Setter

Usage

• Run manually for each entity you want to switch the annotations for.
• Change global variable FILENAME to the Entity file (.java) you want to migrate
• Then execute e.g. python3 EntityAnnotationMigrator.py > output.txt
• Fix any import statement issues in the output, and you're done!

Future improvements

• Keep functions like equals() and hashCode() where they're at, instead of printing them at the end
  • Possible implementations: append to previous setter? use (ind, varName) keys for variableInfo?
• Automatically detect partial migrations (currently, only deals with completed unmigrated entity files)
• Advanced: Automatically generate JSON annotations based on variable/field!