From 6f0d40508286afc8cdd72a0b5f807d5c2a589cfc Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 4 Jun 2010 16:33:08 +0200
Subject: Initial implementation

---
 odb/session.cxx | 120 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 odb/session.cxx

(limited to 'odb/session.cxx')

diff --git a/odb/session.cxx b/odb/session.cxx
new file mode 100644
index 0000000..9ee0104
--- /dev/null
+++ b/odb/session.cxx
@@ -0,0 +1,120 @@
+// file      : odb/session.cxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2010 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#include <utility> // std::make_pair
+
+#include <odb/session.hxx>
+#include <odb/transaction.hxx>
+
+namespace odb
+{
+  session::type_map::
+  ~type_map ()
+  {
+  }
+
+  session::object_proxy::
+  ~object_proxy ()
+  {
+  }
+
+  //
+  // session
+  //
+
+  static session* current_session = 0;
+
+  session::
+  session ()
+  {
+    if (current_session != 0)
+      throw already_in_session ();
+
+    current_session = this;
+  }
+
+  bool session::
+  has_current ()
+  {
+    return current_session != 0;
+  }
+
+  session& session::
+  current ()
+  {
+    if (current_session == 0)
+      throw not_in_session ();
+
+    return *current_session;
+  }
+
+  void session::
+  current (session& s)
+  {
+    current_session = &s;
+  }
+
+  void session::
+  reset_current ()
+  {
+    current_session = 0;
+  }
+
+  void session::
+  flush ()
+  {
+    if (!transaction::has_current ())
+      throw not_in_transaction ();
+
+    // @@ Order of insertion and deletion can be important (triggers,
+    // id assignment, constraints etc).
+    //
+
+    for (object_map::iterator i (object_map_.begin ()),
+           e (object_map_.end ()); i != e;)
+    {
+      object_proxy& pxy (*i->second);
+
+      switch (pxy.state_)
+      {
+      case object_proxy::transient:
+        {
+          pxy.persist ();
+
+          // If the id is auto-assigned, then we only get it now, so
+          // register with the id map.
+          //
+          if (pxy.id_source_ != ids_assigned)
+            pxy.register_id (id_map_, i);
+
+          pxy.state_ = object_proxy::clean;
+          ++i;
+          break;
+        }
+      case object_proxy::dirty:
+        {
+          pxy.update ();
+          pxy.state_ = object_proxy::clean;
+          ++i;
+          break;
+        }
+      case object_proxy::erased:
+        {
+          pxy.erase ();
+          pxy.unregister_id (id_map_);
+          object_map_.erase (i++);
+          break;
+        }
+      case object_proxy::clean:
+        {
+          // Nothing to do for this case.
+          //
+          ++i;
+          break;
+        }
+      }
+    }
+  }
+}
-- 
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