Jackson3 Changes

Proposed Jackson 3.0 changes

JVM/JDK Compatibility

• Jackson 3.x will require and be based on Java 8
  • with possible exception of jackson-core and jackson-annotations (?)

Module structure

• Embed some/all Java8 modules
  • Embed "parameter names", "datatypes" (Optional)
  • Need to think of Java 8 date/time module (size)

API Entities to deprecate/remove/embed

• ContextualSerializer / ContextualDeserializer, ResolvableSerializer / ResolvableDeserializer
  • just embed as part of JsonSerializer / JsonDeserializer, with no-op implementation

Major API change areas:

• JsonNode needs major rework; can do binary-incompatible return value changes

Changes to defaults

(will require wiki sub-page)

• MapperFeature
  • SORT_PROPERTIES_ALPHABETICALLY: default to true (false really doesn't make much sense since it is unstable, and arbitrary based on JVM/JDK)
  • USE_STD_BEAN_NAMING: default to true (only false due to legacy concerns)
• DeserializationFeature
  • READ_ENUMS_USING_TO_STRING: default to true (instead of false that relies on name())
  • FAIL_ON_UNKNOWN_PROPERTIES: default to false? (TOP REQUEST by users)
• SerializationFeature
  • FAIL_ON_EMPTY_BEANS: default to false
• Other
  • Check defaults of date/time handling

Features to Remove

Jackson-core: Format Auto-Detection