--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Plugins/DatabaseBackendAdapterV2.h	Thu Mar 18 18:32:05 2021 +0100
@@ -0,0 +1,84 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2021 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/>.
+ **/
+
+
+
+/**
+ * NOTE: Until Orthanc 1.4.0, this file was part of the Orthanc source
+ * distribution. This file is now part of "orthanc-databases", in
+ * order to uncouple its evolution from the Orthanc core.
+ **/
+
+#pragma once
+
+#include "IDatabaseBackend.h"
+
+
+namespace OrthancDatabases
+{  
+  /**
+   * @brief Bridge between C and C++ database engines.
+   * 
+   * Class creating the bridge between the C low-level primitives for
+   * custom database engines, and the high-level IDatabaseBackend C++
+   * interface, for Orthanc <= 1.9.1.
+   *
+   * @ingroup Callbacks
+   **/
+  class DatabaseBackendAdapterV2
+  {
+  private:
+    // This class cannot be instantiated
+    DatabaseBackendAdapterV2()
+    {
+    }
+
+  public:
+    class Output;
+    
+    class Factory : public IDatabaseBackendOutput::IFactory
+    {
+    private:
+      OrthancPluginContext*         context_;
+      OrthancPluginDatabaseContext* database_;
+
+    public:
+      Factory(OrthancPluginContext*         context,
+              OrthancPluginDatabaseContext* database) :
+        context_(context),
+        database_(database)
+      {
+      }
+
+      virtual IDatabaseBackendOutput* CreateOutput() ORTHANC_OVERRIDE;
+    };
+
+
+    /**
+     * Register a custom database back-end written in C++.
+     *
+     * @param context The Orthanc plugin context, as received by OrthancPluginInitialize().
+     * @param backend Your custom database engine.
+     **/
+
+    static void Register(OrthancPluginContext* context,
+                         IDatabaseBackend& backend);
+  };
+}