Add odb::connection class

This abstract class represents a connection to the database. One can
use it to start a transaction or to execute a native statement out
of a transaction.

Before we had concrete connection classes in the database runtime
libraries (e.g., odb::mysql::connection). Now these classes derive
from odb::connection.

1 files changed, 10 insertions, 11 deletions

diff --git a/odb/sqlite/database.hxx b/odb/sqlite/database.hxx
index cfff30f..0eadbbf 100644
--- a/odb/sqlite/database.hxx
+++ b/odb/sqlite/database.hxx
@@ -28,12 +28,11 @@ namespace odb
 {
   namespace sqlite
   {
+    class transaction_impl;
+
     class LIBODB_SQLITE_EXPORT database: public odb::database
     {
     public:
-      typedef sqlite::connection connection_type;
-
-    public:
       database (const std::string& name,
                 int flags = SQLITE_OPEN_READWRITE,
                 std::auto_ptr<connection_factory> =
@@ -77,14 +76,10 @@ namespace odb
         return flags_;
       }
 
+      // Transactions.
+      //
     public:
-      using odb::database::execute;
-
-      virtual unsigned long long
-      execute (const char* statement, std::size_t length);
-
-    public:
-      virtual transaction_impl*
+      transaction_impl*
       begin ();
 
       transaction_impl*
@@ -94,13 +89,17 @@ namespace odb
       begin_exclusive ();
 
     public:
-      details::shared_ptr<connection_type>
+      connection_ptr
       connection ();
 
     public:
       virtual
       ~database ();
 
+    protected:
+      virtual odb::connection*
+      connection_ ();
+
     private:
       std::string name_;
       int flags_;