Jackson Databind Automatically detect target type (Class) to deserialize to

Is your feature request related to a problem? Please describe.Currently to deserialize object in ObjectMapper we use bel...
  • 2025-09-09 14:04:19
  • 7144

Jackson Databind Add one more parameter for AnnotationIntrospector.findPreferredCreator() method (3.x)

(note: offshoot of #5045) Method: public PotentialCreator findPreferredCreator(MapperConfig<?> config, ...
  • 2025-09-09 14:04:17
  • 687

Jackson Databind If there is a no-parameter constructor marked as JsonCreator and a constructor reported as DefaultCreator, latter is incorrectly used.

Search before asking[x] I searched in the issues and found nothing similar.Describe the bugIf both JsonCreator and Defau...
  • 2025-09-09 14:04:16
  • 6983

Jackson Databind consider removing use of Java Stream API for ObjectMapper.getRegisteredModules() (and rename as registeredModules()?)

This was recently added in Jackson 3.0.0-rc9. #5273The aim appears to have been to support returning collection data in ...
  • 2025-09-09 14:04:12
  • 1982

Jackson Databind Deprecate MapperBuilder.serializationInclusion() (to align with ObjectMapper, prep for 3.0)

While ObjectMapper.setSerializationInclusion() was deprecated a while ago (in 2.0) -- to be replaced with ObjectMapper.s...
  • 2025-09-06 14:02:41
  • 591

Jackson Databind MapperBuilder missing a defaultPropertyInclusion(JsonInclude.Include) method

Search before asking[x] I searched in the issues and found nothing similar.Describe the bugIn 2.20.0, MapperBuilder depr...
  • 2025-09-06 14:02:37
  • 1862

Jackson Databind Support alternate radixes when writing numeric values as strings

As requested in FasterXML/jackson-module-scala#65, and discussed in this thread. This would take the form of:- A BaseSet...
  • 2025-09-05 14:02:08
  • 1151

Jackson Databind Change JsonNode.stringValue() of NullNode to return null, not fail (3.0)

(note: follow-up to #5283)Initial implementation of "Extended set of scalar value accessors " of JSTEP-3 contains implem...
  • 2025-09-03 14:02:17
  • 679

Jackson Databind Can I use MapperFeature.FIX_FIELD_NAME_UPPER_CASE_PREFIX with ParameterNamesModule?

(Discussed in https://github.com/FasterXML/jackson-databind/discussions/5289 )Originally posted by @bananayong August 31...
  • 2025-09-03 14:02:05
  • 1851

Jackson Databind Behavioral change of ALLOW_FINAL_FIELDS_AS_MUTATORS in 2.18

interface MyMap<K, V> extends Map<K, V> {}class MapImpl<K, V> extends HashMap<K, V> implements M...
  • 2025-09-02 14:01:38
  • 2519

Jackson Databind Generics using wildcard not correctly resolved

Search before asking[x] I searched in the issues and found nothing similar.Describe the bugI opened a Spring Boot issue,...
  • 2025-08-30 14:02:12
  • 4457

Jackson Databind JsonNode reading of nullable String looks broken with Jackson 3

Search before asking[x] I searched in the issues and found nothing similar.Describe the bugIn Spring Security, we have a...
  • 2025-08-29 14:02:31
  • 3620

Jackson Databind Reading into existing instance uses creator property setup instead of accessor

Search before asking[x] I searched in the issues and found nothing similar.Describe the bugWhen reading into an existing...
  • 2025-08-27 14:02:23
  • 3164

Jackson Databind EnumDeserializer fails to deserialize Enums with @JsonValue - uses table with name() key instead of @JsonValue key

Search before asking[x] I searched in the issues and found nothing similar.Describe the bugEnumDeserializer fails to des...
  • 2025-08-23 14:02:28
  • 4350

Jackson Databind Replace ObjectMapper.getRegisteredModuleIds() (2.x) with ObjectMapper.getRegisteredModules() (3.0)

(note: this is retro-active issue for change already made in 3.0, included in 3.0.0-rc1 -- but with signature change in ...
  • 2025-08-23 14:02:21
  • 639

Jackson Databind @JacksonInject added to property overrides value from the JSON even if useInput is OptBoolean.TRUE

Hello,I have problem when using @JacksonInject on final field that is initialized using constructor (see the whole examp...
  • 2025-08-22 14:02:14
  • 9124

Jackson Databind 3.x migration guide

3.x seems to introduce severe change to widely used interfaces, like removal of ObjectMapper.registerModule. It'd be nic...
  • 2025-08-22 14:02:10
  • 1756

Jackson Databind Remove ObjectMapper.setSerializationInclusion() from 3.0 (deprecate in 2.20)

(note: this is retroactive issue -- actual removal done before 3.0.0-rc1 release)(note: inspired by #5269)With 3.0, Obje...
  • 2025-08-22 14:02:03
  • 629

Jackson Databind What's the replacement for ObjectMapper.setSerializationInclusion(…)?

Documentation ImprovementThe method was removed from ObjectMapper and I couldn't find any documentation what to use inst...
  • 2025-08-22 14:02:02
  • 124

Jackson Databind Deserialization information declared on getter not considered if no setter is declared

Search before asking[x] I searched in the issues and found nothing similar.Describe the bugIn Jackson 2, a mixin for a g...
  • 2025-08-21 14:03:24
  • 5640
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