FasterXML/jackson-datatype-guava — pull request #5 by celkins (2012-06-12 17:58:07+00:00)
Title: Backport support for Optional

Jackson 1.9 doesn't have DeserializationContext.findRootValueDeserializer(), so I had to adapt GuavaDeserializers to use DeserializationProvider.findTypedValueDeserializer().