diff options
Diffstat (limited to 'src/reference_tree.ml')
| -rw-r--r-- | src/reference_tree.ml | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/reference_tree.ml b/src/reference_tree.ml index 8c42bd5..4cd124a 100644 --- a/src/reference_tree.ml +++ b/src/reference_tree.ml @@ -13,6 +13,8 @@ type t = ref_node_data Vytree.t exception Bad_interface_definition of string +exception Validation_error of string + let default_data = { node_type = Vytree.Other; constraints = []; @@ -104,3 +106,53 @@ let load_from_xml reftree file = in let xml = Xml.parse_file file in xml_to_reftree xml reftree + +(* Validation function *) + +(* A path can be created in the config tree unless: + 1. It's a tag node without a child + 2. It's a non-valueless leaf node without a value + 3. It's a valueless node with a value + 4. It's a non-valueless leaf node with garbage after the value + 5. It's a non-leaf, non-tag node with a name that doesn't exist + in the reference tree + *) +let rec validate_path validators node path = + let show_path p = Util.string_of_path (List.rev p) in + let rec aux node path acc = + let data = Vytree.data_of_node node in + match data.node_type with + | Vytree.Leaf -> + (match path with + | [] -> + if data.valueless then (List.rev acc, None) + else raise (Validation_error + (Printf.sprintf "Node \"%s\" requires a value" (show_path acc) )) + | [p] -> + if not data.valueless then + (if (Value_checker.validate_any validators data.constraints p) then (List.rev acc, Some p) + else raise (Validation_error data.constraint_error_message)) + else raise (Validation_error + (Printf.sprintf "Node %s cannot have a value" (show_path acc))) + | p :: ps -> raise (Validation_error (Printf.sprintf "Path %s is too long" (show_path acc)))) + | Vytree.Tag -> + (match path with + | p :: p' :: ps -> + if (Value_checker.validate_any validators data.constraints p) then + let child = Vytree.find node p' in + (match child with + | Some c -> aux c ps (p' :: p :: acc) + | None -> raise (Validation_error (Printf.sprintf "Node %s has no child %s" (show_path acc) p'))) + else raise (Validation_error (Printf.sprintf "%s is not a valid child name for node %s" p (show_path acc))) + | [p] -> if (Value_checker.validate_any validators data.constraints p) then (List.rev acc, None) + else raise (Validation_error (Printf.sprintf "Node %s has no child %s" (show_path acc) p)) + | _ -> raise (Validation_error (Printf.sprintf "Path %s is incomplete" (show_path acc)))) + | Vytree.Other -> + (match path with + | [] -> (List.rev acc, None) + | p :: ps -> + let child = Vytree.find node p in + (match child with + | Some c -> aux c ps (p :: acc) + | None -> raise (Validation_error ((Printf.sprintf "Path %s is incomplete" (show_path acc)))))) + in aux node path [] |