Jackson Release 2.6.4

Patch version of 2.6, released on December 7, 2015.

Changes, core

Databind

• #984: JsonStreamContexts are not build the same way for write.. and convert methods
• #989: Deserialization from "{}" to java.lang.Object causes "out of END_OBJECT token" error
• #1003: JsonTypeInfo.As.EXTERNAL_PROPERTY does not work with a Delegate
• #1004: Synthetic constructors confusing Jackson data binding
• #1013: @JsonUnwrapped is not treated as assuming @JsonProperty("")
• #1031: Problem with case-insensitive deserialization

Changes, dataformats

Avro

• #23: MapWriteContext.createChildObjectContext() should call _schema.getValueType()
• #26: Should indicate type that was requested when complaining about Any not being supported
• #27: Support serialization of BigDecimal values

CSV

• #90: Unexpected output with arrays starting with a null/empty element
• #98: Escape char is not being escaped during serialization

XML

• #171: @JacksonXmlRootElement malfunction in multi-thread environment
• #172: XML INDENT_OUTPUT property fails to add newline/indent initial elements

Changes, datatypes

JDK8

• #20: fails to serialize empty Optional with @JsonUnwrapped annotation
• #21: Manifest file missing OSGi import for com.fasterxml.jackson.databind.introspect
• #23: Fix an NPE for Optional<Boolean> when coercing from empty JSON String
• #25: OptionalDoubleSerializer does not override acceptJsonFormatVisitor
• #26: @JsonUnwrapped on Optional value does not propagate prefix to schema

Java 8 Date/Time

• #50: Instant schema representation is incorrect for timestamps serialization

Changes, other

Jackson jr

• #27: JSON.Feature.READ_JSON_ARRAYS_AS_JAVA_ARRAYS does not work