--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Plugins/StorageBackend.cpp	Wed Jul 04 18:05:24 2018 +0200
@@ -0,0 +1,133 @@
+/**
+ * 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/>.
+ **/
+
+
+#include "StorageBackend.h"
+
+#if HAS_ORTHANC_EXCEPTION != 1
+#  error HAS_ORTHANC_EXCEPTION must be set to 1
+#endif
+
+#include <Core/OrthancException.h>
+
+
+#define ORTHANC_PLUGINS_DATABASE_CATCH                                  \
+  catch (::Orthanc::OrthancException& e)                                \
+  {                                                                     \
+    return static_cast<OrthancPluginErrorCode>(e.GetErrorCode());       \
+  }                                                                     \
+  catch (::std::runtime_error& e)                                       \
+  {                                                                     \
+    std::string s = "Exception in storage area back-end: " + std::string(e.what()); \
+    OrthancPluginLogError(context_, s.c_str());                         \
+    return OrthancPluginErrorCode_DatabasePlugin;                       \
+  }                                                                     \
+  catch (...)                                                           \
+  {                                                                     \
+    OrthancPluginLogError(context_, "Native exception");                \
+    return OrthancPluginErrorCode_DatabasePlugin;                       \
+  }
+
+
+namespace OrthancDatabases
+{
+  StorageBackend::StorageBackend(IDatabaseFactory* factory) :
+    manager_(factory)
+  {
+  }
+
+
+
+  static OrthancPluginContext* context_ = NULL;
+  static std::auto_ptr<StorageBackend>  backend_;
+    
+  static OrthancPluginErrorCode StorageCreate(const char* uuid,
+                                              const void* content,
+                                              int64_t size,
+                                              OrthancPluginContentType type)
+  {
+    try
+    {
+      backend_->Create(uuid, content, static_cast<size_t>(size), type);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode StorageRead(void** content,
+                                            int64_t* size,
+                                            const char* uuid,
+                                            OrthancPluginContentType type)
+  {
+    try
+    {
+      size_t tmp;
+      backend_->Read(*content, tmp, uuid, type);
+      *size = static_cast<int64_t>(tmp);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode StorageRemove(const char* uuid,
+                                              OrthancPluginContentType type)
+  {
+    try
+    {
+      backend_->Remove(uuid, type);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+  
+  void StorageBackend::Register(OrthancPluginContext* context,
+                                StorageBackend* backend)
+  {
+    if (context == NULL ||
+        backend == NULL)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
+    }
+    
+    if (context_ != NULL ||
+        backend_.get() != NULL)
+    {
+      // This function can only be invoked once in the plugin
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
+    }
+    else
+    {
+      context_ = context;
+      backend_.reset(backend);
+
+      OrthancPluginRegisterStorageArea(context_, StorageCreate, StorageRead, StorageRemove);
+    }
+  }
+
+
+  void StorageBackend::Finalize()
+  {
+    backend_.reset(NULL);
+    context_ = NULL;
+  }
+}