# Validate a Serializable input
	fun validate_json(json: Serializable): Bool do
		if not json isa JsonArray then
			validation.add_error("document", "Expected JsonArray got `{json.class_name}`")
			return false
		end
		validation.array = json
		var allow_empty = self.allow_empty
		if json.is_empty and (allow_empty != null and not allow_empty) then
			validation.add_error("document", "Cannot be empty")
			return false
		end
		var length = self.length
		if length != null and json.length != length then
			validation.add_error("document", "Array length must be exactly `{length}`")
			return false
		end

		return true
	end