From: natile <??>
Date: Fri, 20 Sep 2002 14:46:32 +0000 (+0000)
Subject: Commit of updates in intersect.ml/mli, mqint.ml, Makefile
X-Git-Tag: new_mathql_before_first_merge~33
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=e28b32104f8d3b3ce1c44fdde94d64d02f119287;p=helm.git

Commit of updates in intersect.ml/mli, mqint.ml, Makefile
---

diff --git a/helm/ocaml/mathql_interpreter/.depend b/helm/ocaml/mathql_interpreter/.depend
index 462e69e87..722043c03 100644
--- a/helm/ocaml/mathql_interpreter/.depend
+++ b/helm/ocaml/mathql_interpreter/.depend
@@ -1,2 +1,4 @@
-mqint.cmo: mqint.cmi 
-mqint.cmx: mqint.cmi 
+intersect.cmo: intersect.cmi 
+intersect.cmx: intersect.cmi 
+mqint.cmo: intersect.cmi mqint.cmi 
+mqint.cmx: intersect.cmx mqint.cmi 
diff --git a/helm/ocaml/mathql_interpreter/Makefile b/helm/ocaml/mathql_interpreter/Makefile
index a85693fe8..1ef0ab3fc 100644
--- a/helm/ocaml/mathql_interpreter/Makefile
+++ b/helm/ocaml/mathql_interpreter/Makefile
@@ -2,9 +2,9 @@ PACKAGE = mathql_interpreter
 REQUIRES = helm-urimanager postgres unix helm-mathql
 PREDICATES =
 
-INTERFACE_FILES = mqint.mli
+INTERFACE_FILES = intersect.mli mqint.mli
 
-IMPLEMENTATION_FILES = mqint.ml
+IMPLEMENTATION_FILES = intersect.ml mqint.ml
 
 # $(INTERFACE_FILES:%.mli=%.ml)
 
diff --git a/helm/ocaml/mathql_interpreter/intersect.ml b/helm/ocaml/mathql_interpreter/intersect.ml
index bf0d05c2c..9a0f408ef 100644
--- a/helm/ocaml/mathql_interpreter/intersect.ml
+++ b/helm/ocaml/mathql_interpreter/intersect.ml
@@ -25,40 +25,56 @@
 
 exception NotCompatible;;
 
-(* intersect_attributes is successful iff there is no attribute with *)
-(* two different values in the two lists. The returned list is the   *)
-(* union of the two lists.                                           *)
-let rec intersect_attributes (attr1, attr2) =
- match attr1, attr2 with
-    [],_ -> attr2
-  | _,[] -> attr1
-  | (key1,value1)::tl1, (key2,_)::_ when key1 < key2 ->
-      (key1,value1)::(intersect_attributes (tl1,attr2))
-  | (key1,_)::_, (key2,value2)::tl2 when key2 < key1 ->
-      (key2,value2)::(intersect_attributes (attr1,tl2))
-  | entry1::tl1, entry2::tl2 when entry1 = entry2 ->
-     entry1::(intersect_attributes (tl1,tl2))
-  | _, _ -> raise NotCompatible  (* same keys, different values *)
+(* Catenates two lists preserving order and getting rid of duplicates *)
+let rec append (l1,l2) =
+  match l1,l2 with
+     [],_ -> l2
+   | _,[] -> l1
+   | s1::tl1, s2::_ when s1 < s2 -> s1::append (tl1,l2)                     
+   | s1::_, s2::tl2 when s2 < s1 -> s2::append (l1,tl2) 
+   | s1::tl1, s2::tl2 -> s1::append (tl1,tl2) 
+
 ;;
 
-(* preserves order and gets rid of duplicates *)
-let rec intersect_ex l1 l2 =
- let module S = Mathql_semantics in
-  match (l1, l2) with
+
+(* Sums two attribute groups preserving order *)
+let rec sum_groups(gr1, gr2) =
+  match gr1, gr2 with
+     [],_ -> gr2
+   | _,[] -> gr1
+   | (key1,l1)::tl1, (key2,l2)::_ when key1 < key2 -> (key1,l1)::(sum_groups (tl1,gr2))
+   | (key1,l1)::_, (key2,l2)::tl2 when key2 < key1 -> (key2,l2)::(sum_groups (gr1,tl2))
+   | (key1,l1)::tl1, (key2,l2)::tl2 -> (key1,(append (l1,l2)))::(sum_groups (tl1,tl2))
+
+;;
+
+(* Product between an attribute set and a gropu of attributes *)
+let rec sub_prod (aset, gr) =           (*prende un aset e un gr e fa la somma tra tutti i gruppi di aset e gr *)
+  match aset with
+      [] -> []
+    | gr1::tl1 -> sum_groups (gr1, gr)::(sub_prod(tl1, gr)) 
+;;
+
+
+(* Cartesian product between two attribute sets*)
+let rec prod (as1, as2) =
+  match as1, as2 with
+    [],_ -> as2
+  | _,[] -> as1
+  | gr1::tl1, _ -> (sub_prod (as2, gr1))@(prod (tl1, as2))  (* chiamo la sub_prod con un el. as1 e as2 *)
+;;
+
+(* Intersection between two resource sets, preserves order and gets rid of duplicates *)
+let rec intersect_ex rs1 rs2 =
+  match (rs1, rs2) with
      [],_
    | _,[] -> []
-   | {S.uri = uri1}::tl1,
-     {S.uri = uri2}::_ when uri1 < uri2 -> intersect_ex tl1 l2
-   | {S.uri = uri1}::_,
-     {S.uri = uri2}::tl2 when uri2 < uri1 -> intersect_ex l1 tl2
-   | {S.uri = uri1 ; S.attributes = attributes1}::tl1,
-     {S.uri = uri2 ; S.attributes = attributes2}::tl2 ->
-       try
-        let attributes' = intersect_attributes (attributes1,attributes2) in
-         {S.uri = uri1 ; S.attributes = attributes' ; S.extra = ""}::(intersect_ex tl1 tl2)
-       with
-        NotCompatible ->
-         intersect_ex tl1 tl2
+   | (uri1,as1)::tl1,
+     (uri2,as2)::_ when uri1 < uri2 -> intersect_ex tl1 rs2
+   | (uri1,as1)::_,
+     (uri2,as2)::tl2 when uri2 < uri1 -> intersect_ex rs1 tl2
+   | (uri1,as1)::tl1,
+     (uri2,as2)::tl2 -> (uri1, prod(as1,as2))::intersect_ex tl1 tl2 
 ;;
 
 let intersect_ex l1 l2 =
diff --git a/helm/ocaml/mathql_interpreter/intersect.mli b/helm/ocaml/mathql_interpreter/intersect.mli
index 3b721b4f7..956a05922 100644
--- a/helm/ocaml/mathql_interpreter/intersect.mli
+++ b/helm/ocaml/mathql_interpreter/intersect.mli
@@ -24,4 +24,4 @@
  *)
 
 val intersect_ex :
- Mathql_semantics.result -> Mathql_semantics.result -> Mathql_semantics.result
+ MathQL.result -> MathQL.result -> MathQL.result
diff --git a/helm/ocaml/mathql_interpreter/mqint.ml b/helm/ocaml/mathql_interpreter/mqint.ml
index 02055f727..a0c56e384 100644
--- a/helm/ocaml/mathql_interpreter/mqint.ml
+++ b/helm/ocaml/mathql_interpreter/mqint.ml
@@ -35,9 +35,9 @@ open Eval;;
 open Utility;;
 open Dbconn;;
 open Pattern;;
-open Union;;
+open Union;;*)
 open Intersect;;
-open Diff;;
+(*open Diff;;
 open Sortedby;;
 open Use;;
 open Select;;
@@ -276,12 +276,12 @@ let groups = ref [] (* contesto dei gruppi *)
 
 let vvars = ref [] (* contesto delle vvar introdotte con let-in *)
 
-(* valuta una MathQL.set_exp e ritorna un MathQL.resource_set *)
 
 let rec exec_set_exp = function 
-   | MathQL.Ref x -> []
-
-
+   | MathQL.Ref vexp -> List.map (fun s -> (s,[])) (exec_val_exp vexp)
+   | MathQL.Intersect sexp1 sexp2 -> intersect_ex (exec_set_exp sexp1) (exec_set_exp sexp2)    
+   | _ -> assert false
+   
 (* valuta una MathQL.boole_exp e ritorna un boole *)
 
 and exec_boole_exp = function
@@ -289,17 +289,19 @@ and exec_boole_exp = function
    | MathQL.True       -> true
    | MathQL.Not x      -> not (exec_boole_exp x)
    | MathQL.And (x, y) -> (exec_boole_exp x) && (exec_boole_exp y)
-   | MathQL.Or (x, y)  -> (exec_boole_exp x) || (exec_boole_exp y)
-
+   | MathQL.Or (x, y)  -> (exec_boole_exp x) || (exec_boole_exp y)   
+   | _ -> assert false
 
 (* valuta una MathQL.val_exp e ritorna un MathQL.value *)
 
 and exec_val_exp = function
-   | MathQL.Const l -> []
-
+   | MathQL.Const x -> x
+   | _ -> assert false
 
 (* valuta una MathQL.set_exp nel contesto vuoto e ritorna un MathQL.resource_set *)
 
+(* valuta una MathQL.set_exp e ritorna un MathQL.resource_set *)
 let execute x =
-   svars := []; rvars := []; groups := [];
+   svars := []; rvars := []; groups := []; vvars := [];
    exec_set_exp x
+