X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Fmathql_interpreter%2FmQueryInterpreter.ml;h=453b1643ce7fec85eef7483312848fde097f0298;hb=4167cea65ca58897d1a3dbb81ff95de5074700cc;hp=c1422b8ae50c1a6e6b586580da35cd4cb5325a86;hpb=39b9497090ee5cc501de1e3d9044d71fdc5cf1fb;p=helm.git

diff --git a/helm/ocaml/mathql_interpreter/mQueryInterpreter.ml b/helm/ocaml/mathql_interpreter/mQueryInterpreter.ml
index c1422b8ae..453b1643c 100644
--- a/helm/ocaml/mathql_interpreter/mQueryInterpreter.ml
+++ b/helm/ocaml/mathql_interpreter/mQueryInterpreter.ml
@@ -23,205 +23,223 @@
  * http://cs.unibo.it/helm/.
  *)
 
-open Dbconn;;
-open Union;;
-open Intersect;;
-open Meet;;
-open Property;;
-open Sub;;
-open Context;;
-open Diff;;
-open Relation;;
-open Func;;
-open Pattern;;
-
-exception SVarUnbound of string;;
-exception RVarUnbound of string;;
-exception VVarUnbound of string;;
-exception PathUnbound of (string * string list);;
+(*  AUTOR: Ferruccio Guidi <fguidi@cs.unibo.it>
+ *)
 
-exception BooleExpTrue
-  
-(* valuta una MathQL.set_exp e ritorna un MathQL.resource_set *)
+(* contexts *****************************************************************)
 
-let galax_char = 'G'
-let stat_char = 'S'
+type svar_context = (MathQL.svar * MathQL.resource_set) list
 
-let execute_aux handle x =
-   let module M = MathQL in
-   let module X = MQueryMisc in
-let rec exec_set_exp c = function
-     M.SVar svar ->
-      (try
-        List.assoc svar c.svars
-       with Not_found ->
-        raise (SVarUnbound svar))
-   | M.RVar rvar ->
-      (try
-        [List.assoc rvar c.rvars]  
-       with Not_found ->
-        raise (RVarUnbound rvar))
-   | M.Ref vexp -> List.map (fun s -> (s,[])) (exec_val_exp c vexp)
-   | M.Pattern vexp -> pattern_ex handle (exec_val_exp c vexp)
-   | M.Intersect (sexp1, sexp2) ->    
-        let before = X.start_time() in
-	let rs1 = exec_set_exp c sexp1 in
-	let rs2 = exec_set_exp c sexp2 in
-        let res = intersect_ex rs1 rs2 in
-        let diff = X.stop_time before in
-        let ll1 = string_of_int (List.length rs1) in
-        let ll2 = string_of_int (List.length rs2) in
-	if MQIConn.set handle MQIConn.Stat then
-        MQIConn.log handle ("INTERSECT(" ^ ll1 ^ "," ^ ll2 ^ ") = " ^ string_of_int (List.length res) ^
-         ": " ^ diff ^ "\n");
-        res
-   | M.Union (sexp1, sexp2) -> 
-        let before = X.start_time () in
-	let res = union_ex (exec_set_exp c sexp1) (exec_set_exp c sexp2) in
-	let diff = X.stop_time before in
-        if MQIConn.set handle MQIConn.Stat then MQIConn.log handle ("UNION: " ^ diff ^ "\n");
-        res		      	
-   | M.LetSVar (svar, sexp1, sexp2) ->
-        let before = X.start_time() in
-        let c1 = upd_svars c ((svar, exec_set_exp c sexp1) :: c.svars) in 
-	let res = exec_set_exp c1 sexp2 in
-	if MQIConn.set handle MQIConn.Stat then begin
-	   MQIConn.log handle ("LETIN " ^ svar ^ " = " ^ string_of_int (List.length res) ^ ": ");
-	   MQIConn.log handle (X.stop_time before ^ "\n");
-        end;
-	res			
-   | M.LetVVar (vvar, vexp, sexp) ->
-        let before = X.start_time() in
-	let c1 = upd_vvars c ((vvar, exec_val_exp c vexp) :: c.vvars) in
-	let res = exec_set_exp c1 sexp in
-	if MQIConn.set handle MQIConn.Stat then begin
-	   MQIConn.log handle ("LETIN " ^ vvar ^ " = " ^ string_of_int (List.length res) ^ ": ");
-           MQIConn.log handle (X.stop_time before ^ "\n");
-        end;
-	res
-   | M.Relation (inv, rop, path, sexp, assl) -> 
-        let before = X.start_time() in
-	if MQIConn.set handle MQIConn.Galax  then begin
-           let res = relation_galax_ex handle inv rop path (exec_set_exp c sexp) assl in
-           if MQIConn.set handle MQIConn.Stat then begin
-              MQIConn.log handle  ("RELATION-GALAX " ^ (fst path) ^ " = " ^ string_of_int(List.length res) ^ ": ");
-              MQIConn.log handle (X.stop_time before ^ "\n")
-          end;
-          res
-        end else begin 
-           let res = relation_ex handle inv rop path (exec_set_exp c sexp) assl in
-	   if MQIConn.set handle MQIConn.Stat then begin 
-	      MQIConn.log handle ("RELATION " ^ (fst path) ^ " = " ^ string_of_int(List.length res) ^ ": ");
-              MQIConn.log handle (X.stop_time before ^ "\n")
-           end;
-           res
-	end
-   | M.Select (rvar, sexp, bexp) ->
-        let before = X.start_time() in
-        let rset = (exec_set_exp c sexp) in
-        let rec select_ex =
-         function
-	    [] -> []
-	  | r::tl -> 
-             let c1 = upd_rvars c ((rvar,r)::c.rvars) in                      
-              if (exec_boole_exp c1 bexp) then
-               r::(select_ex tl)
-              else
-               select_ex tl
-        in 
-	let res = select_ex rset in
-	if MQIConn.set handle MQIConn.Stat then begin
-	   MQIConn.log handle ("SELECT " ^ rvar ^ " = " ^ string_of_int (List.length res) ^ ": ");
-	   MQIConn.log handle (X.stop_time before ^ "\n");
-        end;
-	res
-   | M.Diff (sexp1, sexp2) -> diff_ex (exec_set_exp c sexp1) (exec_set_exp c sexp2)
-   
-(* valuta una MathQL.boole_exp e ritorna un boole *)
+type avar_context = (MathQL.avar * MathQL.resource) list
 
-and exec_boole_exp c =
- function
-    M.False      -> false
-  | M.True       -> true
-  | M.Not x      -> not (exec_boole_exp c x)
-  | M.And (x, y) -> (exec_boole_exp c x) && (exec_boole_exp c y)
-  | M.Or (x, y)  -> (exec_boole_exp c x) || (exec_boole_exp c y)
-  | M.Sub (vexp1, vexp2) ->
-     sub_ex (exec_val_exp c vexp1) (exec_val_exp c vexp2)
-  | M.Meet (vexp1, vexp2) ->
-     meet_ex (exec_val_exp c vexp1) (exec_val_exp c vexp2)
-  | M.Eq (vexp1, vexp2) -> (exec_val_exp c vexp1) = (exec_val_exp c vexp2)
-  | M.Ex l bexp -> 
-     if l = [] then
-      (exec_boole_exp c bexp)
-     else
-   	 let latt =
-          List.map
-           (fun uri -> 
-             let (r,attl) =
-              (try
-                List.assoc uri c.rvars
-               with Not_found -> assert false)
-             in
-              (uri,attl)
-           ) l (*latt = l + attributi*)
-	 in
-	  try
-	   let rec prod c =
-            function
-	       [] -> if (exec_boole_exp c bexp) then raise BooleExpTrue 
-	     | (uri,attl)::tail1 ->
-                 (*per ogni el. di attl devo andare in ric. su tail1*)
-                 let rec sub_prod attl =
-                  match attl with
-                     [] -> () 
-                   | att::tail2 ->
-                      let c1 = upd_groups c ((uri,att)::c.groups) in
-                       prod c1 tail1; sub_prod tail2 
-                 in	      
-                  sub_prod attl 
-   	   in
-	    prod c latt;
-            false
-	  with BooleExpTrue -> true
+type group_context = (MathQL.avar * MathQL.attribute_group) list
 
-(* valuta una MathQL.val_exp e ritorna un MathQL.value *)
+type vvar_context = (MathQL.vvar * MathQL.value) list
 
-and exec_val_exp c = function
-     M.Const x -> let
-        ol = List.sort compare x in 
-   			let rec edup = function
-			
-			   [] -> [] 
-			 | s::tl -> if tl <> [] then  
-			                         if s = (List.hd tl) then edup tl
-			                         else s::(edup tl)
-				    else s::[]
-	                in
-			 edup ol
-   | M.Record (rvar, path) ->
-      (try
-        List.assoc path
-         (try
-           List.assoc rvar c.groups
-          with Not_found ->
-           raise (RVarUnbound rvar))
-       with Not_found ->
-        raise (PathUnbound path))
-   | M.VVar s ->
-      (try
-        List.assoc s c.vvars
-       with Not_found ->
-        raise (VVarUnbound s))
-   | M.RefOf sexp -> List.map (fun (s,_) -> s) (exec_set_exp c sexp)
-   | M.Fun (s, vexp) -> fun_ex handle s (exec_val_exp c vexp)
-   | M.Property (inv, rop, path, vexp) -> property_ex handle rop path inv (exec_val_exp c vexp) 
+type context = {svars: svar_context;   
+                avars: avar_context;   
+                groups: group_context; (* auxiliary context *)
+                vvars: vvar_context  
+               }
 
-(* valuta una MathQL.set_exp nel contesto vuoto e ritorna un MathQL.resource_set *)
-in
-   exec_set_exp {svars = []; rvars = []; groups = []; vvars = []} x 
+(* execute  *****************************************************************)
 
-(* new interface  ***********************************************************)
+exception Found
 
-let execute handle x = execute_aux handle x
+module M = MathQL
+module P = MQueryUtil 
+module C = MQIConn
+module U = MQIUtil
 
+let execute h x =
+   let warn q = 
+     if C.set h C.Warn then 
+     begin
+        C.log h "MQIExecute: waring: reference to undefined variables: ";
+	P.text_of_query (C.log h) "\n" q
+     end
+   in
+   let rec eval_val c = function
+      | M.False -> U.mql_false
+      | M.True -> U.mql_true
+      | M.Const s -> [s]
+      | M.Set l -> U.iter (eval_val c) l
+      | M.Test (k,y1,y2) ->
+         let cand y1 y2 =
+	    if eval_val c y1 = U.mql_false then U.mql_false else eval_val c y2
+	 in
+	 let cor y1 y2 =
+            let v1 = eval_val c y1 in
+	    if v1 = U.mql_false then eval_val c y2 else v1
+	 in
+	 let h f y1 y2 = f (eval_val c y1) (eval_val c y2) in
+         let f = match k with
+	    | M.And  -> cand
+	    | M.Or   -> cor
+	    | M.Xor  -> h U.xor
+	    | M.Sub  -> h U.set_sub
+	    | M.Meet -> h U.set_meet
+	    | M.Eq   -> h U.set_eq
+	    | M.Le   -> h U.le
+	    | M.Lt   -> h U.lt
+	 in
+         f y1 y2 
+      | M.Not y -> 
+         if eval_val c y = U.mql_false then U.mql_true else U.mql_false
+      | M.VVar i -> begin
+         try List.assoc i c.vvars 
+         with Not_found -> warn (M.Subj (M.VVar i)); [] end
+      | M.Dot (i,p) -> begin
+         try List.assoc p (List.assoc i c.groups) 
+	 with Not_found -> warn (M.Subj (M.Dot (i,p))); [] end
+      | M.Proj (None,x) -> List.map (fun (r, _) -> r) (eval_query c x)
+      | M.Proj ((Some p),x) -> 
+         let proj_group_aux (q, v) = if q = p then v else [] in 
+         let proj_group a = U.iter proj_group_aux a in
+         let proj_set (_, g) = U.iter proj_group g in
+         U.iter proj_set (eval_query c x)
+      | M.Ex (l,y) -> 
+         let rec ex_aux h = function
+	    | []        -> 
+	       let d = {c with groups = h} in
+               if eval_val d y = U.mql_false then () else raise Found 
+	    | i :: tail -> 
+               begin
+	          try 
+		     let (_, a) = List.assoc i c.avars in 
+		     let rec add_group = function
+		        | []     -> ()
+	                | g :: t -> ex_aux ((i, g) :: h) tail; add_group t 
+		     in
+		     add_group a
+	          with Not_found -> ()
+	       end
+         in
+	 (try ex_aux [] l; U.mql_false with Found -> U.mql_true)
+      | M.StatVal y ->
+         let t = P.start_time () in
+	 let r = (eval_val c y) in
+	 let s = P.stop_time t in
+         C.log h (Printf.sprintf "Stat: %s,%i\n" s (List.length r));
+	 r
+      | M.Count y -> [string_of_int (List.length (eval_val c y))]
+      | M.Align (s,y) -> U.iter (U.align s) (eval_val c y)
+   and eval_query c = function
+      | M.Empty -> [] 
+      | M.Subj x ->
+         List.map (fun s -> (s, [])) (eval_val c x)
+      | M.Log (_,b,x) ->
+         if b then begin
+	    let t = P.start_time () in
+	    P.text_of_query (C.log h) "\n" x;
+	    let s = P.stop_time t in
+	    if C.set h C.Times then 
+	       C.log h (Printf.sprintf "Log source: %s\n" s);
+	    eval_query c x
+	 end else begin
+            let s = (eval_query c x) in
+	    let t = P.start_time () in
+	    P.text_of_result (C.log h) "\n" s; 
+	    let r = P.stop_time t in
+	    if C.set h C.Times then 
+	       C.log h (Printf.sprintf "Log: %s\n" r);
+	    s
+	 end
+      | M.If (y,x1,x2) ->
+         if (eval_val c y) = U.mql_false 
+	    then (eval_query c x2) else (eval_query c x1)
+      | M.Bin (k,x1,x2) ->
+         let f = match k with
+	    | M.BinFJoin -> U.mql_union
+	    | M.BinFMeet -> U.mql_intersect
+	    | M.BinFDiff -> U.mql_diff
+	 in
+	 f (eval_query c x1) (eval_query c x2) 
+      | M.SVar i -> begin
+         try List.assoc i c.svars 
+	 with Not_found -> warn (M.SVar i); [] end  
+      | M.AVar i -> begin
+         try [List.assoc i c.avars] 
+	 with Not_found -> warn (M.AVar i); [] end
+      | M.LetSVar (i,x1,x2) ->
+	 let d = {c with svars = U.set (i, eval_query c x1) c.svars} in
+         eval_query d x2
+      | M.LetVVar (i,y,x) ->
+	 let d = {c with vvars = U.set (i, eval_val c y) c.vvars} in
+         eval_query d x
+      | M.For (k,i,x1,x2) ->
+         let f = match k with
+	    | M.GenFJoin -> U.mql_union
+	    | M.GenFMeet -> U.mql_intersect
+	 in
+         let rec for_aux = function
+	    | []     -> []
+	    | h :: t ->
+	       let d = {c with avars = U.set (i, h) c.avars} in
+	       f (eval_query d x2) (for_aux t)
+	 in
+	 for_aux (eval_query c x1)
+      | M.Add (b,z,x) ->
+         let f = if b then U.mql_prod else U.set_union in
+	 let g a s = (fst a, f (snd a) (eval_grp c z)) :: s in
+	 List.fold_right g (eval_query c x) []
+      | M.Property (q0,q1,q2,mc,ct,cfl,el,pat,y) ->
+	 let subj, mct = 
+	    if q0 then [], (pat, q2 @ mc, eval_val c y)
+	          else (q2 @ mc), (pat, [], eval_val c y)  
+	 in
+         let eval_cons (pat, p, y) = (pat, q2 @ p, eval_val c y) in
+	 let cons_true = mct :: List.map eval_cons ct in
+	 let cons_false = List.map (List.map eval_cons) cfl in
+	 let eval_exp (p, po) = (q2 @ p, po) in
+	 let exp = List.map eval_exp el in
+	 let t = P.start_time () in
+	 let r = MQIProperty.exec h q1 subj cons_true cons_false exp in 
+	 let s = P.stop_time t in
+         if C.set h C.Times then 
+	    C.log h (Printf.sprintf "Property: %s,%i\n" s (List.length r));
+	 r 
+      | M.StatQuery x ->
+         let t = P.start_time () in
+	 let r = (eval_query c x) in
+	 let s = P.stop_time t in
+         C.log h (Printf.sprintf "Stat: %s,%i\n" s (List.length r));
+	 r
+      | M.Select (i,x,y) ->
+         let rec select_aux = function
+	    | []     -> []
+	    | h :: t ->
+	       let d = {c with avars = U.set (i, h) c.avars} in
+	       if eval_val d y = U.mql_false 
+	          then select_aux t else h :: select_aux t
+	 in
+	 select_aux (eval_query c x)
+      | M.Keep (b,l,x) -> 
+         let keep_path (p, v) t = 
+	    if List.mem p l = b then t else (p, v) :: t in
+	 let keep_grp a = List.fold_right keep_path a [] in
+         let keep_set a g = 
+	    let kg = keep_grp a in
+	    if kg = [] then g else kg :: g
+	 in
+	 let keep_av (s, g) = (s, List.fold_right keep_set g []) in
+	 List.map keep_av (eval_query c x) 
+   and eval_grp c = function
+      | M.Attr gs ->
+         let attr_aux g (p, y) = U.mql_union g [(p, eval_val c y)] in
+	 let attr_auxs s l = U.set_union s [List.fold_left attr_aux [] l] in
+	 List.fold_left attr_auxs [] gs
+      | M.From i ->
+         try snd (List.assoc i c.avars) 
+	 with Not_found -> warn (M.AVar i); []
+   in
+   let c = {svars = []; avars = []; groups = []; vvars = []} in
+   let t = P.start_time () in   
+   if C.set h C.Source then P.text_of_query (C.log h) "\n" x;
+   let r = eval_query c x in
+   if C.set h C.Result then P.text_of_result (C.log h) "\n" r;
+   let s = P.stop_time t in
+   if C.set h C.Times then 
+      C.log h (Printf.sprintf "MQIExecute: %s,%s\n" s 
+         (C.string_of_flags (C.flags h)));
+   r