How to automatically deserialize data field (Annotated with @JsonAdapter(JsonElementTypeAdapter.Factory))

[marcushoepfner]

The question is w.r.t. type hierarchy.
The LSP defines a method for prepareTypeHierarchy(TypeHierarchyPrepareParams params) in TextDocumentService.
Afterwards typeHierarchySupertypes(TypeHierarchySupertypesParams params) or typeHierarchySubtypes(TypeHierarchySubtypesParams params) is called.

To pass data from prepare to one of the other methods a "data" member can be filled in TypeHierarchyItem.
data is annotated with:
@JsonAdapter(JsonElementTypeAdapter.Factory)

While serialization of the data field into JSON is done automatically, I need to deserialize the member in super or sub method manually by calling new Gson().fromJson(myData);

I cannot find out how to get it automatically. I tried registering own JsonAdapterFactory but it did not work.

Can this be achieved or is just not foreseen?
Thanks, Marcus

[pisv]

Hi Marcus,

As far as I can tell, you are correct, it cannot be done automatically. Only the server knows the actual type of TypeHierarchyItem.data; JsonElementTypeAdapter can only parse it into a tree of JsonElements.

[marcushoepfner]

Thanks for your answer.
What a pity.
Because serialization is done automatically, while deserialization has to be done manually.

I wonder whether it was possible somehow by corresponding GSON annotation or it is not possible at all.