Version 2.3[.0] was released in November, 2013. It is a "minor" Jackson Releases following 2.2, meaning that it adds new functionality but be backwards compatible with earlier 2.x releases.

Branch is closed for all new releases (including micro-patches)

Beyond initial 2.3.0 (described here), following patch releases have been made.

• 2.3.1 (28-Dec-2013)
• 2.3.2 (01-Mar-2014)
• 2.3.3 (10-Apr-2014)
• 2.3.4 (17-Jul-2014)
• 2.3.5 (13-Jan-2015)
• 2.3.6: not released as of December 2015.

Beyond latest release, following critical micro-patches have also been released

• jackson-dataformat-smile 2.3.5.1 (15-Jul-2015), with critical fixes:
  • #25: Buffer overflow when writing unescaped binary content

This branch is special in 2.x hierarchy in that it is planned to be long-living branch (similar to 1.9), and stay open even when 2.4 and later minor versions are released. This is because it is:

• Last version to support older Android versions (it specifically omits use of certain methods from java.util.Arrays)
• Last version to support Scala 2.9 (2.4 only supports 2.10 and above)

While initial decision had been made to require JDK 1.6 as the baseline, team decided to make an exception for version 2.3.2, so that old Android versions could use it -- basically this means that some changes were reverted for just that version. 2.4 will fully require JDK 1.6.

Another packaging change was to reduce amount of debug information for core (streaming, annotations, databind) packages. While this did result in significant reduction in jar sizes (20-25% smaller), it did lead to problems with developers: 2.4 will revert to full debug information for the default jars, and we will try to figure out a way to offer alternative 'minimal' packages with no debug information.

• #13: Add @JsonPropertyDescription (mostly to support descriptions in JSON Schema)

• #8 Add methods in JsonParser/JsonGenerator for reading/writing "native" Object Ids (initially, to support YAML anchors, aliases)
• #47: Support YAML-style comments with JsonParser.Feature.ALLOW_YAML_COMMENTS
• #60: Add feature JsonParser.Feature.STRICT_DUPLICATE_DETECTION to allow strict verification of uniqueness of property names during streaming parsing.
• #91: Add methods in JsonParser/JsonGenerator for reading/writing "native" Type Ids (initially, to support YAML "tags")

• #215: Allow registering CharacterEscapes via ObjectWriter
• #227: Allow registering "general" Enum serializers, deserializers, via SimpleModule
• #237: Add DeserializationFeature.FAIL_ON_READING_DUP_TREE_KEY to throw JsonMappingException on duplicate keys, tree model (JsonNode)
• #238: Allow existence of overlapping getter, is-getter (choose 'regular' getter)
• #269: Add support for new @JsonPropertyDescription via AnnotationIntrospector
• #270: Add SerializationFeature.USE_EQUALITY_FOR_OBJECT_ID to allow use of equality (instead of identity) for figuring out when to use Object Id

• #20: Support filtering with @JsonView, @JsonFilter

• #38: Support root-level Collection serialization
• #64: Problems deserializing unwrapped lists, with optional (and missing) attribute.
• #71: Fix issues with XmlMapper.convertValue()
• Add support for JsonGenerator.Feature.WRITE_BIGDECIMAL_AS_PLAIN

• #17: Add support for YAML native type ids ("tags")

• #29: Empty ImmutableMap not deserialized correctly, when type info included
• Add support for DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY for ImmutableSet and MultiSet

• #36: Support @ElementCollection for specifying lazy-loading
• #44: NullPointerException when @OneToMany map is encountered
• Support handling of JsonInclude(Include.NON_EMPTY) for lazy-loaded Collections (partially addresses #21)

• #18: Add JodaMapper, sub-class of basic ObjectMapper that auto-registers Joda module

• #24: Allow defining default view to use for endpoints without View annotation
• #33: Provide a way to customize ObjectReader / ObjectWriter used by end points

• #25: @XmlElementWrapper() should work with USE_WRAPPER_NAME_AS_PROPERTY_NAME, use underlying "default" property name

• #33: SuperSonicBeanDeserializer not working (missing optimization)
• #34: Needs to skip private creators, can not access even from sub-class.

First official release!

• #25: @XmlElementWrapper() should work wrt USE_WRAPPER_NAME_AS_PROPERTY_NAME, use underlying "default" property name

• #14: Generated schema contains multiple 'type' values
• #18: Add mechanism to customize schema for property
• #24: Improved Schema generation for Maps

• #3: Should not throw an exception if name not found

• #103: (Regression) Serialization of a class containing Option[JsonNode] fails
• #103: (Regression) Serialization of a class containing Option[JsonNode] fails
• #102: (Regression) JsonMappingException Argument of constructor has no property name annotation
• #101: version 2.2.3 can't deserialize some class that version 2.2.2 can
• #100: Deserializing SortedSets