Jackson Release 2.12.1

Patch version of 2.12, released on January 8th, 2021.

Following fixes are be included.

Changes, core

Streaming

Databind

• #2962: Auto-detection of constructor-based creator method skipped if there is an annotated factory-based creator method (regression from 2.11)
• #2972: ObjectMapper.treeToValue() no longer invokes JsonDeserializer.getNullValue()
• #2973: DeserializationProblemHandler is not invoked when trying to deserializing String
• #2978: Fix failing double JsonCreators in jackson 2.12.0
• #2979: Conflicting in POJOPropertiesCollector when having namingStrategy
• #2990: Breaking API change in BasicClassIntrospector (2.12.0)
• #3005: JsonNode.requiredAt() does NOT fail on some path expressions
• #3009: Exception thrown when Collections.synchronizedList() is serialized with type info, deserialized

Changes, data formats

Ion

• #282: Allow disabling native type ids in IonMapper

XML

• #435: After upgrade to 2.12.0, NPE when deserializing an empty element to ArrayList

Changes, datatypes

Java 8 date/time

• #196: @JsonFormat overriden features don't apply when there are no other options while deserializing ZonedDateTime

Joda

• #120: Cache formatter with offset parsed (performance improvement)

JSR-353

• #7: Jackson JSR353 library is using wrong module name for javax json api

Changes, other modules

Afterburner

• #120: Afterburner does not support the new CoercionConfig (and same with Blackbird)

Blackbird

• #123: BlackBird not support fluent setter

Changes, JVM Languages

Kotlin

• #402: Remove implicitly-included java.base dep in module-info.java

Scala

• No functionality changes but ScalaObjectMapper has been deprecated because it relies on Manifests and these are not supported in Scala3.

Changes, other

jackson-jr

• #76: Annotation-based introspector does not include super-class fields