--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancServer/Search/Compatibility/CompatibilityDatabaseWrapper.h	Thu Dec 20 16:42:35 2018 +0100
@@ -0,0 +1,60 @@
+/**
+ * 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 General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include "../../IDatabaseWrapper.h"
+
+namespace Orthanc
+{
+  /**
+   * This is a compatibility class that contains database primitives
+   * that were used in Orthanc <= 1.5.1, and that have been removed
+   * during the optimization of the database engine.
+   **/
+  class CompatibilityDatabaseWrapper : public IDatabaseWrapper
+  {
+  public:
+    virtual void LookupIdentifier(std::list<int64_t>& result,
+                                  ResourceType level,
+                                  const DicomTag& tag,
+                                  IdentifierConstraintType type,
+                                  const std::string& value) = 0;
+ 
+    virtual void LookupIdentifierRange(std::list<int64_t>& result,
+                                       ResourceType level,
+                                       const DicomTag& tag,
+                                       const std::string& start,
+                                       const std::string& end) = 0;
+  };
+}