+(* Copyright (C) 2000, HELM Team.
+ *
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ *
+ * For details, see the HELM World-Wide-Web page,
+ * http://cs.unibo.it/helm/.
+ *)
(*
* implementazione del'interprete MathQL
open Pattern;;
open Union;;
open Intersect;;
+open Diff;;
+open Sortedby;;
open Use;;
open Select;;
+let fi_to_string fi =
+ match fi with
+ (None, _) ->
+ ""
+ | (Some i, y) ->
+ "#xpointer(1/" ^
+ string_of_int i ^
+ (
+ match y with
+ None ->
+ ""
+ | Some j ->
+ "/" ^ (string_of_int j)
+ ) ^
+ ")"
+;;
+
(*
* inizializzazione della connessione al database
*)
let init () = Dbconn.init ();;
+(* execute_ex env q *)
+(* [env] is the attributed uri environment in which the query [q] *)
+(* must be evaluated *)
+(* [q] is the query to evaluate *)
+(* It returns a [Mathql_semantics.result] *)
+let rec execute_ex env =
+ function
+ MQSelect (apvar, alist, abool) ->
+ select_ex env apvar (execute_ex env alist) abool
+ | MQUsedBy (alist, asvar) ->
+ use_ex (execute_ex env alist) asvar "F" (*"refObj"*)
+ | MQUse (alist, asvar) ->
+ use_ex (execute_ex env alist) asvar "B" (*"backPointer"*)
+ | MQPattern (apreamble, apattern, afragid) ->
+ pattern_ex apreamble apattern afragid
+ | MQUnion (l1, l2) ->
+ union_ex (execute_ex env l1) (execute_ex env l2)
(*
- * esecuzione di una query
- *
- * parametri:
- * q
- *
- * output: string list list; risultato internto formato da uri + contesto.
- *)
-let rec execute_ex q =
- match q with
- MQSelect (apvar, alist, abool) ->
- select_ex apvar (execute_ex alist) abool
- | MQUsedBy (alist, asvar) ->
- use_ex (execute_ex alist) asvar "refObj"
- | MQUse (alist, asvar) ->
- use_ex (execute_ex alist) asvar "backPointer"
- | MQPattern (apreamble, apattern, ext, afragid) ->
- pattern_ex apreamble apattern ext afragid
- | MQUnion (l1, l2) ->
- union_ex (execute_ex l1) (execute_ex l2)
- | MQIntersect (l1, l2) ->
- intersect_ex (execute_ex l1) (execute_ex l2)
+ | MQDiff (l1, l2) ->
+ diff_ex (execute_ex env l1) (execute_ex env l2)
+ | MQSortedBy (l, o, f) ->
+ sortedby_ex (execute_ex env l) o f
+*)
+ | MQIntersect (l1, l2) ->
+ intersect_ex (execute_ex env l1) (execute_ex env l2)
+ | MQRVarOccur rvar -> [List.assoc rvar env]
;;
+(* Let's initialize the execute in Select, creating a cyclical recursion *)
+Select.execute := execute_ex;;
+
(*
* converte il risultato interno di una query (uri + contesto)
* in un risultato di sole uri
* la uri puo' far parte del risultato.
*)
let xres_to_res l =
- MQStrUri
- (
- List.map
- List.hd
- (List.tl l)
- )
+ let tmp = List.map (function {Mathql_semantics.uri = uri} -> uri) l in
+ MQRefs
+ (List.map
+ (function l ->
+ match Str.split (Str.regexp ":\|#\|/") l with
+ hd::tl -> (
+ match List.rev tl with
+ ")"::n::"xpointer(1"::tail ->
+ (
+ hd,
+ List.fold_left
+ (fun par t ->
+ match par with
+ [] -> [MQString t]
+ | _ -> (MQString t) :: MQSlash :: par
+ )
+ []
+ tail,
+ (Some (int_of_string n), None)
+ )
+ | ")"::n::m::"xpointer(1"::tail ->
+ (
+ hd,
+ List.fold_left
+ (fun par t ->
+ match par with
+ [] -> [MQString t]
+ | _ -> (MQString t) :: MQSlash :: par
+ )
+ []
+ tail,
+ (Some (int_of_string m), Some (int_of_string n))
+ )
+ | tail ->
+ (
+ hd,
+ List.fold_left
+ (fun par t ->
+ match par with
+ [] -> [MQString t]
+ | _ -> (MQString t) :: MQSlash :: par
+ )
+ []
+ tail,
+ (None, None)
+ )
+ )
+ | [] -> assert false
+ )
+ tmp
+ )
;;
+
(*
*
*)
let execute q =
match q with
- MQList qq -> xres_to_res (execute_ex qq)
+ MQList qq -> xres_to_res (execute_ex [] qq)
;;
(*