I find the standard serialization JSON, while flexible, of Range<T> to be quite verbose:

{
  "lower_endpoint": 12,
  "lower_bound_type": "CLOSED",
  "upper_endpoint": 34,
  "upper_bound_type": "OPEN"
}

When manually processing the results, I prefer to shorter notation produced by, among others, the default toString() invocation: [12..34).

Similar to Instant, where we can use @JsonFormat(shape = ..) to control (de)serialization to use the ISO format or unix milis, it would be great if we could control the shape of the range this way. Keep the default as-is and only when @JsonFormat(shape = STRING) is provided, use the shorter notation.

Granted, this will only work for endpoints having scalar values, but that seems to cover the majority of use cases I've seen so far.