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Jackson Release 2.9

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Tatu Saloranta edited this page Oct 11, 2016 · 175 revisions

Version 2.9 development has not yet been started, as of July 2016, but will start soon.

New Modules, status changes

Changes: compatibility

Major features of 2.9

Implemented

  1. Add separate exception type for "pojo configuration problem" (InvalidDefinitionException), distinct from "json input" problem; in general to distinguish between bad configuration (server-side issue) and bad data (client issue) #1356
  2. Per-property custom serialization inclusion (@JsonInclude(value=Include.CUSTOM, valueFilter=MyExcluder.class) #888

Under construction

Planned

  1. Per-property overwrite-vs-merge annotation/handling, to allow for merging of configuration information (for example) #1399
  2. Ability to override handling of null for deserialization #1402
  3. Aliases, to allow migration: alternate property id names to accept (but not write) #1029
  4. Non-blocking JSON/Smile parser?
  5. Rewrite of property/creator introspection code, to resolve most open issues wrt Creator auto-detection and name-detection
  6. Support for @JsonIncludeProperties (opposite of @JsonIgnoreProperties) #1296
  7. Allow pre-defining Object Ids; pluggable Object Id converters? #693
  8. "Safe" ObjectReader, ObjectWriter; that is, ones that does NOT throw checked exceptions (wrap IOExceptions), to work better with Java 8 Streams #779
  9. A way to force a supertype as type id to use during serialization: this is needed to avoid deserialization problems for things like concrete Hibernate collection type.

And possibly

  • Protobuf: Schema building by hand
  • Comma-separated "ints in a String"

Change list

Changes, core

Annotations

  • #103: Add JsonInclude.Include.CUSTOM, properties for specifying filter(s) to use

Databind

  • #507: Support for default @JsonView for a class
  • #888: Allow specifying custom exclusion comparator via @JsonInclude, using JsonInclude.Include.CUSTOM
  • #1035: @JsonAnySetter assumes key of String, does not consider declared type
  • #1320: Add ObjectNode.put(String, BigInteger)
  • #1341: DeserializationFeature.FAIL_ON_MISSING_EXTERNAL_TYPE_ID_PROPERTY
  • #1356: Differentiate between input and code exceptions on deserialization
  • #1369: Improve @JsonCreator detection via AnnotationIntrospector by passing MappingConfig
  • #1371: Add MapperFeature.INFER_CREATOR_FROM_CONSTRUCTOR_PROPERTIES to allow disabling use of @CreatorProperties as explicit @JsonCreator equivalent

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