@JsonUnwrapped not supported for Map-valued properties

According to the documentation,

Annotation used to indicate that a property should be serialized “unwrapped”; that is, if it would be serialized as JSON Object, its properties are instead included as properties of its containing Object.

Unfortunately, this seems to work only with bean types, and does not work with Map<String, Object>. Given that bean types are generally completely interchangeable with Maps, it would be very nice if this worked correctly.

[marceloverdijk]

Unfortunately the @JsonAnyGetter does not work (easily) with Kotlin:

class Links(
        @JsonAnyGetter
        val links: Map<String, Link>
) : Serializable

as the annotation needs to put on a method.

!! UPDATE !!

It does work (easily):

class Links(
        @get:JsonAnyGetter
        val links: Map<String, Link>
) : Serializable

[Druckles]

About the only question I have is whether there are some specific differences between just using @JsonAnyGetter/@JsonAnySetter combo, and potential @JsonUnwrapped. … Or put another way: if @JsonUnwrapped was essentially implemented as sort of alias for “any-getter”, would that work?

I have the same problem as @odrotbohm: @JsonUnwrapped sits on top of a generic. To get it to work, I’ve needed to create subclass that overrides the getter so I can add @JsonAnyGetter. The any-getter doesn’t work because it’s of type T, not a Map and it throws an error during runtime otherwise.

This creates other problems because I’ve subclassed it. Being able to use @JsonUnwrapped would be much easier, cleaner and safer.