FF4 - Skeleton code for 2.0

- Created new objects for the 2.0.0 code base, needed in 1.8.0.
- Sketched out basic interfaces.

src/rewrite/TDB.cpp

@@ -25,6 +25,7 @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 
+#include <string>
 #include "TDB.h"
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -35,15 +36,17 @@ TDB::TDB ()
 ////////////////////////////////////////////////////////////////////////////////
 TDB::TDB (const TDB& other)
 {
-//  mOne = other.mOne;
+  throw std::string ("unimplemented");
+  mLocations = other.mLocations;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 TDB& TDB::operator= (const TDB& other)
 {
+  throw std::string ("unimplemented");
   if (this != &other)
   {
-//    mOne = other.mOne;
+    mLocations = other.mLocations;
   }
 
   return *this;
@@ -55,4 +58,39 @@ TDB::~TDB ()
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+void TDB::location (const std::string& path)
+{
+  throw std::string ("unimplemented");
+  mLocations.push_back (path);
+}
 
+////////////////////////////////////////////////////////////////////////////////
+// TODO Returns number of filtered tasks.
+int TDB::load (std::vector <T>& tasks, Filter& filter)
+{
+  throw std::string ("unimplemented");
+  return 0;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// TODO Write to transaction log.
+void TDB::update (T& before, T& after)
+{
+  throw std::string ("unimplemented");
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// TODO writes all, including comments
+int TDB::commit ()
+{
+  throw std::string ("unimplemented");
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// TODO -> FF4
+void TDB::upgrade ()
+{
+  throw std::string ("unimplemented");
+}
+
+////////////////////////////////////////////////////////////////////////////////