--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Common/ImplicitTransaction.h	Thu Jul 12 10:44:17 2018 +0200
@@ -0,0 +1,75 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include "ITransaction.h"
+
+namespace OrthancDatabases
+{
+  class ImplicitTransaction : public ITransaction
+  {
+  private:
+    enum State
+    {
+      State_Ready,
+      State_Executed,
+      State_Committed
+    };
+
+    State   state_;
+    bool    readOnly_;
+
+    void CheckStateForExecution();
+    
+  protected:
+    virtual IResult* ExecuteInternal(IPrecompiledStatement& statement,
+                                     const Dictionary& parameters) = 0;
+
+    virtual void ExecuteWithoutResultInternal(IPrecompiledStatement& statement,
+                                              const Dictionary& parameters) = 0;
+    
+  public:
+    ImplicitTransaction();
+
+    virtual ~ImplicitTransaction();
+    
+    virtual bool IsImplicit() const
+    {
+      return true;
+    }
+    
+    virtual bool IsReadOnly() const
+    {
+      return readOnly_;
+    }
+
+    virtual void Rollback();
+    
+    virtual void Commit();
+    
+    virtual IResult* Execute(IPrecompiledStatement& statement,
+                             const Dictionary& parameters);
+
+    virtual void ExecuteWithoutResult(IPrecompiledStatement& statement,
+                                      const Dictionary& parameters);
+  };
+}