Multimap Serializer doesn't honor @JsonInclude(JsonInclude.Include.NON_EMPTY)

[olvesh]

The code below will give the following json object:

{"someMap" : { }}

and I would expect

{ }

This happens also when I confiugre the mapper to:

mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);

    @JsonInclude(JsonInclude.Include.NON_EMPTY)
    class MainClass {
        @JsonProperty
        Multimap<String, String> someMap = ArrayListMultimap.create();
    }

[cowtowncoder]

Thanks! Deserializer is probably missing definition of what "empty" means here, or check. Will see.

[cowtowncoder]

Changed MultimapSerializer to extend ContainerSerializer, implement necessary support methods: this resolves specific issue reported, as well as other potentially missing hooks for container types.