--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Plugin/ResourceHierarchyCache.h	Wed Mar 22 16:13:52 2017 +0100
@@ -0,0 +1,89 @@
+/**
+ * Advanced authorization plugin for Orthanc
+ * Copyright (C) 2017 Osimis, 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 "ICacheFactory.h"
+#include "Enumerations.h"
+#include "OrthancResource.h"
+
+#include <orthanc/OrthancCPlugin.h>
+#include <memory>
+
+namespace OrthancPlugins
+{
+  class ResourceHierarchyCache : public boost::noncopyable
+  {
+  private:
+    OrthancPluginContext   *context_;
+    std::auto_ptr<ICache>   cache_;   // Maps resources to their parents
+    std::auto_ptr<ICache>   orthancToDicom_;
+    std::auto_ptr<ICache>   dicomToOrthanc_;
+
+    std::string ComputeKey(Orthanc::ResourceType level,
+                           const std::string identifier) const;
+    
+    std::string ComputeKey(const OrthancResource& resource) const
+    {
+      return ComputeKey(resource.GetLevel(), resource.GetIdentifier());
+    }
+
+    void LinkParent(const OrthancResource& child,
+                    const OrthancResource& parent);
+
+    bool LookupParent(std::string& target,
+                      const OrthancResource& resource);
+
+    bool LookupParent(std::string& target,
+                      Orthanc::ResourceType level,
+                      const std::string& identifier)
+    {
+      return LookupParent(target, OrthancResource(level, identifier));
+    }
+
+  public:
+    ResourceHierarchyCache(OrthancPluginContext* context,
+                           ICacheFactory& factory);
+
+    void Invalidate(Orthanc::ResourceType level,
+                    const std::string& identifier);
+
+    bool LookupStudy(std::string& patient,
+                     const std::string& study)
+    {
+      return LookupParent(patient, Orthanc::ResourceType_Study, study);
+    }
+
+    bool LookupSeries(std::string& patient,
+                      std::string& study,
+                      const std::string& series);
+
+    bool LookupInstance(std::string& patient,
+                        std::string& study,
+                        std::string& series,
+                        const std::string& instance);
+
+    bool LookupDicomUid(std::string& target,
+                        Orthanc::ResourceType level,
+                        const std::string& orthancId);
+
+    bool LookupOrthancId(std::string& target,
+                         Orthanc::ResourceType level,
+                         const std::string& dicomUid);
+  };
+}