--- branches/new_design/OOPSE-4/src/UseTheForce/ForceField.hpp	2004/11/12 17:40:03	1735
+++ branches/new_design/OOPSE-4/src/UseTheForce/ForceField.hpp	2004/11/15 23:00:32	1740
@@ -37,6 +37,7 @@
 #define MK_STR(s) # s
 #define STR_DEFINE(t, s) t = MK_STR(s)
 
+#include <string>
 #include <utilities>
 
 #include "utils/Tuple.hpp"
@@ -62,7 +63,8 @@ class ForceField{
             hasVariant_ = true; 
             variant_ = variant; 
         }
-        virtual void readParams() = 0;  
+        
+        virtual void parse(const std::string& filename) = 0;  
 
         AtomType* getAtomType(const std::string &at);
         BondType* getBondType(const std::string &at1, const std::string &at2);
@@ -71,6 +73,8 @@ class ForceField{
         TorsionType* getTorsionType(const std::string &at1, const std::string &at2,
                                           const std::string &at3, const std::string &at4);
 
+        //avoid make virtual function public
+        //Herb Sutter and Andrei Alexandrescu, C++ coding Standards, Addision-Wesley
         virtual double getRcutFromAtomType(AtomType* at);
 
         std::string getWildCard() {
@@ -90,9 +94,9 @@ class ForceField{
         void addTorsionType(const std::string &at1, const std::string &at2,
                                           const std::string &at3, const std::string &at4, TorsionType* torsionType);
 
+        ifstrstream* openForceFieldFile(const std::string& filename);
     private:  
         std::string ffPath_;
-        ifstrstream forceFile_;
         bool hasVariant_;
         std::string variant_;