--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Plugins/DatabaseBackendAdapterV2.cpp	Thu Mar 18 18:32:05 2021 +0100
@@ -0,0 +1,1549 @@
+/**
+ * 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/>.
+ **/
+
+
+
+#include "DatabaseBackendAdapterV2.h"
+
+#include <OrthancException.h>
+
+
+#define ORTHANC_PLUGINS_DATABASE_CATCH                                  \
+  catch (::Orthanc::OrthancException& e)                                \
+  {                                                                     \
+    return static_cast<OrthancPluginErrorCode>(e.GetErrorCode());       \
+  }                                                                     \
+  catch (::std::runtime_error& e)                                       \
+  {                                                                     \
+    LogError(backend, e);                                               \
+    return OrthancPluginErrorCode_DatabasePlugin;                       \
+  }                                                                     \
+  catch (...)                                                           \
+  {                                                                     \
+    OrthancPluginLogError(backend->GetContext(), "Native exception");   \
+    return OrthancPluginErrorCode_DatabasePlugin;                       \
+  }
+
+
+#include <stdexcept>
+#include <list>
+#include <string>
+
+
+namespace OrthancDatabases
+{  
+  class DatabaseBackendAdapterV2::Output : public IDatabaseBackendOutput
+  {
+  public:
+    enum AllowedAnswers
+    {
+      AllowedAnswers_All,
+      AllowedAnswers_None,
+      AllowedAnswers_Attachment,
+      AllowedAnswers_Change,
+      AllowedAnswers_DicomTag,
+      AllowedAnswers_ExportedResource,
+      AllowedAnswers_MatchingResource,
+      AllowedAnswers_String,
+      AllowedAnswers_Metadata
+    };
+
+  private:
+    OrthancPluginContext*         context_;
+    OrthancPluginDatabaseContext* database_;
+    AllowedAnswers                allowedAnswers_;
+
+  public:   
+    Output(OrthancPluginContext*         context,
+           OrthancPluginDatabaseContext* database) :
+      context_(context),
+      database_(database),
+      allowedAnswers_(AllowedAnswers_All /* for unit tests */)
+    {
+    }
+
+    void SetAllowedAnswers(AllowedAnswers allowed)
+    {
+      allowedAnswers_ = allowed;
+    }
+
+    OrthancPluginDatabaseContext* GetDatabase() const
+    {
+      return database_;
+    }
+
+    virtual void SignalDeletedAttachment(const std::string& uuid,
+                                         int32_t            contentType,
+                                         uint64_t           uncompressedSize,
+                                         const std::string& uncompressedHash,
+                                         int32_t            compressionType,
+                                         uint64_t           compressedSize,
+                                         const std::string& compressedHash) ORTHANC_OVERRIDE
+    {
+      OrthancPluginAttachment attachment;
+      attachment.uuid = uuid.c_str();
+      attachment.contentType = contentType;
+      attachment.uncompressedSize = uncompressedSize;
+      attachment.uncompressedHash = uncompressedHash.c_str();
+      attachment.compressionType = compressionType;
+      attachment.compressedSize = compressedSize;
+      attachment.compressedHash = compressedHash.c_str();
+
+      OrthancPluginDatabaseSignalDeletedAttachment(context_, database_, &attachment);
+    }
+
+    virtual void SignalDeletedResource(const std::string& publicId,
+                                       OrthancPluginResourceType resourceType) ORTHANC_OVERRIDE
+    {
+      OrthancPluginDatabaseSignalDeletedResource(context_, database_, publicId.c_str(), resourceType);
+    }
+
+    virtual void SignalRemainingAncestor(const std::string& ancestorId,
+                                         OrthancPluginResourceType ancestorType) ORTHANC_OVERRIDE
+    {
+      OrthancPluginDatabaseSignalRemainingAncestor(context_, database_, ancestorId.c_str(), ancestorType);
+    }
+
+    virtual void AnswerAttachment(const std::string& uuid,
+                                  int32_t            contentType,
+                                  uint64_t           uncompressedSize,
+                                  const std::string& uncompressedHash,
+                                  int32_t            compressionType,
+                                  uint64_t           compressedSize,
+                                  const std::string& compressedHash) ORTHANC_OVERRIDE
+    {
+      if (allowedAnswers_ != AllowedAnswers_All &&
+          allowedAnswers_ != AllowedAnswers_Attachment)
+      {
+        throw std::runtime_error("Cannot answer with an attachment in the current state");
+      }
+
+      OrthancPluginAttachment attachment;
+      attachment.uuid = uuid.c_str();
+      attachment.contentType = contentType;
+      attachment.uncompressedSize = uncompressedSize;
+      attachment.uncompressedHash = uncompressedHash.c_str();
+      attachment.compressionType = compressionType;
+      attachment.compressedSize = compressedSize;
+      attachment.compressedHash = compressedHash.c_str();
+
+      OrthancPluginDatabaseAnswerAttachment(context_, database_, &attachment);
+    }
+
+    virtual void AnswerChange(int64_t                    seq,
+                              int32_t                    changeType,
+                              OrthancPluginResourceType  resourceType,
+                              const std::string&         publicId,
+                              const std::string&         date) ORTHANC_OVERRIDE
+    {
+      if (allowedAnswers_ != AllowedAnswers_All &&
+          allowedAnswers_ != AllowedAnswers_Change)
+      {
+        throw std::runtime_error("Cannot answer with a change in the current state");
+      }
+
+      OrthancPluginChange change;
+      change.seq = seq;
+      change.changeType = changeType;
+      change.resourceType = resourceType;
+      change.publicId = publicId.c_str();
+      change.date = date.c_str();
+
+      OrthancPluginDatabaseAnswerChange(context_, database_, &change);
+    }
+
+    virtual void AnswerDicomTag(uint16_t group,
+                                uint16_t element,
+                                const std::string& value) ORTHANC_OVERRIDE
+    {
+      if (allowedAnswers_ != AllowedAnswers_All &&
+          allowedAnswers_ != AllowedAnswers_DicomTag)
+      {
+        throw std::runtime_error("Cannot answer with a DICOM tag in the current state");
+      }
+
+      OrthancPluginDicomTag tag;
+      tag.group = group;
+      tag.element = element;
+      tag.value = value.c_str();
+
+      OrthancPluginDatabaseAnswerDicomTag(context_, database_, &tag);
+    }
+
+    virtual void AnswerExportedResource(int64_t                    seq,
+                                        OrthancPluginResourceType  resourceType,
+                                        const std::string&         publicId,
+                                        const std::string&         modality,
+                                        const std::string&         date,
+                                        const std::string&         patientId,
+                                        const std::string&         studyInstanceUid,
+                                        const std::string&         seriesInstanceUid,
+                                        const std::string&         sopInstanceUid) ORTHANC_OVERRIDE
+    {
+      if (allowedAnswers_ != AllowedAnswers_All &&
+          allowedAnswers_ != AllowedAnswers_ExportedResource)
+      {
+        throw std::runtime_error("Cannot answer with an exported resource in the current state");
+      }
+
+      OrthancPluginExportedResource exported;
+      exported.seq = seq;
+      exported.resourceType = resourceType;
+      exported.publicId = publicId.c_str();
+      exported.modality = modality.c_str();
+      exported.date = date.c_str();
+      exported.patientId = patientId.c_str();
+      exported.studyInstanceUid = studyInstanceUid.c_str();
+      exported.seriesInstanceUid = seriesInstanceUid.c_str();
+      exported.sopInstanceUid = sopInstanceUid.c_str();
+
+      OrthancPluginDatabaseAnswerExportedResource(context_, database_, &exported);
+    }
+
+
+#if ORTHANC_PLUGINS_HAS_DATABASE_CONSTRAINT == 1
+    virtual void AnswerMatchingResource(const std::string& resourceId) ORTHANC_OVERRIDE
+    {
+      if (allowedAnswers_ != AllowedAnswers_All &&
+          allowedAnswers_ != AllowedAnswers_MatchingResource)
+      {
+        throw std::runtime_error("Cannot answer with an exported resource in the current state");
+      }
+
+      OrthancPluginMatchingResource match;
+      match.resourceId = resourceId.c_str();
+      match.someInstanceId = NULL;
+
+      OrthancPluginDatabaseAnswerMatchingResource(context_, database_, &match);
+    }
+#endif
+
+
+#if ORTHANC_PLUGINS_HAS_DATABASE_CONSTRAINT == 1
+    virtual void AnswerMatchingResource(const std::string& resourceId,
+                                        const std::string& someInstanceId) ORTHANC_OVERRIDE
+    {
+      if (allowedAnswers_ != AllowedAnswers_All &&
+          allowedAnswers_ != AllowedAnswers_MatchingResource)
+      {
+        throw std::runtime_error("Cannot answer with an exported resource in the current state");
+      }
+
+      OrthancPluginMatchingResource match;
+      match.resourceId = resourceId.c_str();
+      match.someInstanceId = someInstanceId.c_str();
+
+      OrthancPluginDatabaseAnswerMatchingResource(context_, database_, &match);
+    }
+#endif
+  };
+    
+
+  static void LogError(IDatabaseBackend* backend,
+                       const std::runtime_error& e)
+  {
+    const std::string message = "Exception in database back-end: " + std::string(e.what());
+    OrthancPluginLogError(backend->GetContext(), message.c_str());
+  }
+
+
+  static OrthancPluginErrorCode  AddAttachment(void* payload,
+                                               int64_t id,
+                                               const OrthancPluginAttachment* attachment)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->AddAttachment(id, *attachment);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+                             
+  static OrthancPluginErrorCode  AttachChild(void* payload,
+                                             int64_t parent,
+                                             int64_t child)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->AttachChild(parent, child);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+          
+                   
+  static OrthancPluginErrorCode  ClearChanges(void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->ClearChanges();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+                             
+
+  static OrthancPluginErrorCode  ClearExportedResources(void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->ClearExportedResources();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  CreateResource(int64_t* id, 
+                                                void* payload,
+                                                const char* publicId,
+                                                OrthancPluginResourceType resourceType)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      *id = backend->CreateResource(publicId, resourceType);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+          
+         
+  static OrthancPluginErrorCode  DeleteAttachment(void* payload,
+                                                  int64_t id,
+                                                  int32_t contentType)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      backend->DeleteAttachment(*output, id, contentType);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+   
+
+  static OrthancPluginErrorCode  DeleteMetadata(void* payload,
+                                                int64_t id,
+                                                int32_t metadataType)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->DeleteMetadata(id, metadataType);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+   
+
+  static OrthancPluginErrorCode  DeleteResource(void* payload,
+                                                int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      backend->DeleteResource(*output, id);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  GetAllInternalIds(OrthancPluginDatabaseContext* context,
+                                                   void* payload,
+                                                   OrthancPluginResourceType resourceType)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::list<int64_t> target;
+      backend->GetAllInternalIds(target, resourceType);
+
+      for (std::list<int64_t>::const_iterator
+             it = target.begin(); it != target.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerInt64(backend->GetContext(),
+                                         output->GetDatabase(), *it);
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  GetAllPublicIds(OrthancPluginDatabaseContext* context,
+                                                 void* payload,
+                                                 OrthancPluginResourceType resourceType)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::list<std::string> ids;
+      backend->GetAllPublicIds(ids, resourceType);
+
+      for (std::list<std::string>::const_iterator
+             it = ids.begin(); it != ids.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerString(backend->GetContext(),
+                                          output->GetDatabase(),
+                                          it->c_str());
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  GetAllPublicIdsWithLimit(OrthancPluginDatabaseContext* context,
+                                                          void* payload,
+                                                          OrthancPluginResourceType resourceType,
+                                                          uint64_t since,
+                                                          uint64_t limit)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::list<std::string> ids;
+      backend->GetAllPublicIds(ids, resourceType, since, limit);
+
+      for (std::list<std::string>::const_iterator
+             it = ids.begin(); it != ids.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerString(backend->GetContext(),
+                                          output->GetDatabase(),
+                                          it->c_str());
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  GetChanges(OrthancPluginDatabaseContext* context,
+                                            void* payload,
+                                            int64_t since,
+                                            uint32_t maxResult)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_Change);
+
+    try
+    {
+      bool done;
+      backend->GetChanges(*output, done, since, maxResult);
+        
+      if (done)
+      {
+        OrthancPluginDatabaseAnswerChangesDone(backend->GetContext(),
+                                               output->GetDatabase());
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  GetChildrenInternalId(OrthancPluginDatabaseContext* context,
+                                                       void* payload,
+                                                       int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::list<int64_t> target;
+      backend->GetChildrenInternalId(target, id);
+
+      for (std::list<int64_t>::const_iterator
+             it = target.begin(); it != target.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerInt64(backend->GetContext(),
+                                         output->GetDatabase(), *it);
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+          
+         
+  static OrthancPluginErrorCode  GetChildrenPublicId(OrthancPluginDatabaseContext* context,
+                                                     void* payload,
+                                                     int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::list<std::string> ids;
+      backend->GetChildrenPublicId(ids, id);
+
+      for (std::list<std::string>::const_iterator
+             it = ids.begin(); it != ids.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerString(backend->GetContext(),
+                                          output->GetDatabase(),
+                                          it->c_str());
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  GetExportedResources(OrthancPluginDatabaseContext* context,
+                                                      void* payload,
+                                                      int64_t  since,
+                                                      uint32_t  maxResult)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_ExportedResource);
+
+    try
+    {
+      bool done;
+      backend->GetExportedResources(*output, done, since, maxResult);
+
+      if (done)
+      {
+        OrthancPluginDatabaseAnswerExportedResourcesDone(backend->GetContext(),
+                                                         output->GetDatabase());
+      }
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+          
+         
+  static OrthancPluginErrorCode  GetLastChange(OrthancPluginDatabaseContext* context,
+                                               void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_Change);
+
+    try
+    {
+      backend->GetLastChange(*output);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  GetLastExportedResource(OrthancPluginDatabaseContext* context,
+                                                         void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_ExportedResource);
+
+    try
+    {
+      backend->GetLastExportedResource(*output);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+    
+               
+  static OrthancPluginErrorCode  GetMainDicomTags(OrthancPluginDatabaseContext* context,
+                                                  void* payload,
+                                                  int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_DicomTag);
+
+    try
+    {
+      backend->GetMainDicomTags(*output, id);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+          
+         
+  static OrthancPluginErrorCode  GetPublicId(OrthancPluginDatabaseContext* context,
+                                             void* payload,
+                                             int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::string s = backend->GetPublicId(id);
+      OrthancPluginDatabaseAnswerString(backend->GetContext(),
+                                        output->GetDatabase(),
+                                        s.c_str());
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  GetResourceCount(uint64_t* target,
+                                                  void* payload,
+                                                  OrthancPluginResourceType  resourceType)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      *target = backend->GetResourceCount(resourceType);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+                   
+
+  static OrthancPluginErrorCode  GetResourceType(OrthancPluginResourceType* resourceType,
+                                                 void* payload,
+                                                 int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      *resourceType = backend->GetResourceType(id);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  GetTotalCompressedSize(uint64_t* target,
+                                                        void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      *target = backend->GetTotalCompressedSize();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+          
+         
+  static OrthancPluginErrorCode  GetTotalUncompressedSize(uint64_t* target,
+                                                          void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      *target = backend->GetTotalUncompressedSize();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+                   
+
+  static OrthancPluginErrorCode  IsExistingResource(int32_t* existing,
+                                                    void* payload,
+                                                    int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      *existing = backend->IsExistingResource(id);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  IsProtectedPatient(int32_t* isProtected,
+                                                    void* payload,
+                                                    int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      *isProtected = backend->IsProtectedPatient(id);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  ListAvailableMetadata(OrthancPluginDatabaseContext* context,
+                                                       void* payload,
+                                                       int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::list<int32_t> target;
+      backend->ListAvailableMetadata(target, id);
+
+      for (std::list<int32_t>::const_iterator
+             it = target.begin(); it != target.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerInt32(backend->GetContext(),
+                                         output->GetDatabase(),
+                                         *it);
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+          
+         
+  static OrthancPluginErrorCode  ListAvailableAttachments(OrthancPluginDatabaseContext* context,
+                                                          void* payload,
+                                                          int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::list<int32_t> target;
+      backend->ListAvailableAttachments(target, id);
+
+      for (std::list<int32_t>::const_iterator
+             it = target.begin(); it != target.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerInt32(backend->GetContext(),
+                                         output->GetDatabase(),
+                                         *it);
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  LogChange(void* payload,
+                                           const OrthancPluginChange* change)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->LogChange(*change);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+          
+         
+  static OrthancPluginErrorCode  LogExportedResource(void* payload,
+                                                     const OrthancPluginExportedResource* exported)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->LogExportedResource(*exported);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+          
+         
+  static OrthancPluginErrorCode  LookupAttachment(OrthancPluginDatabaseContext* context,
+                                                  void* payload,
+                                                  int64_t id,
+                                                  int32_t contentType)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_Attachment);
+
+    try
+    {
+      backend->LookupAttachment(*output, id, contentType);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  LookupGlobalProperty(OrthancPluginDatabaseContext* context,
+                                                      void* payload,
+                                                      int32_t property)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::string s;
+      if (backend->LookupGlobalProperty(s, property))
+      {
+        OrthancPluginDatabaseAnswerString(backend->GetContext(),
+                                          output->GetDatabase(),
+                                          s.c_str());
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  LookupIdentifier3(OrthancPluginDatabaseContext* context,
+                                                   void* payload,
+                                                   OrthancPluginResourceType resourceType,
+                                                   const OrthancPluginDicomTag* tag,
+                                                   OrthancPluginIdentifierConstraint constraint)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::list<int64_t> target;
+      backend->LookupIdentifier(target, resourceType, tag->group, tag->element, constraint, tag->value);
+
+      for (std::list<int64_t>::const_iterator
+             it = target.begin(); it != target.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerInt64(backend->GetContext(),
+                                         output->GetDatabase(), *it);
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  LookupIdentifierRange(OrthancPluginDatabaseContext* context,
+                                                       void* payload,
+                                                       OrthancPluginResourceType resourceType,
+                                                       uint16_t group,
+                                                       uint16_t element,
+                                                       const char* start,
+                                                       const char* end)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::list<int64_t> target;
+      backend->LookupIdentifierRange(target, resourceType, group, element, start, end);
+
+      for (std::list<int64_t>::const_iterator
+             it = target.begin(); it != target.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerInt64(backend->GetContext(),
+                                         output->GetDatabase(), *it);
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  LookupMetadata(OrthancPluginDatabaseContext* context,
+                                                void* payload,
+                                                int64_t id,
+                                                int32_t metadata)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::string s;
+      if (backend->LookupMetadata(s, id, metadata))
+      {
+        OrthancPluginDatabaseAnswerString(backend->GetContext(),
+                                          output->GetDatabase(), s.c_str());
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  LookupParent(OrthancPluginDatabaseContext* context,
+                                              void* payload,
+                                              int64_t id)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      int64_t parent;
+      if (backend->LookupParent(parent, id))
+      {
+        OrthancPluginDatabaseAnswerInt64(backend->GetContext(),
+                                         output->GetDatabase(), parent);
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  LookupResource(OrthancPluginDatabaseContext* context,
+                                                void* payload,
+                                                const char* publicId)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      int64_t id;
+      OrthancPluginResourceType type;
+      if (backend->LookupResource(id, type, publicId))
+      {
+        OrthancPluginDatabaseAnswerResource(backend->GetContext(),
+                                            output->GetDatabase(), 
+                                            id, type);
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  SelectPatientToRecycle(OrthancPluginDatabaseContext* context,
+                                                        void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      int64_t id;
+      if (backend->SelectPatientToRecycle(id))
+      {
+        OrthancPluginDatabaseAnswerInt64(backend->GetContext(),
+                                         output->GetDatabase(), id);
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  SelectPatientToRecycle2(OrthancPluginDatabaseContext* context,
+                                                         void* payload,
+                                                         int64_t patientIdToAvoid)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      int64_t id;
+      if (backend->SelectPatientToRecycle(id, patientIdToAvoid))
+      {
+        OrthancPluginDatabaseAnswerInt64(backend->GetContext(),
+                                         output->GetDatabase(), id);
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  SetGlobalProperty(void* payload,
+                                                   int32_t property,
+                                                   const char* value)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->SetGlobalProperty(property, value);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  SetMainDicomTag(void* payload,
+                                                 int64_t id,
+                                                 const OrthancPluginDicomTag* tag)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->SetMainDicomTag(id, tag->group, tag->element, tag->value);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  SetIdentifierTag(void* payload,
+                                                  int64_t id,
+                                                  const OrthancPluginDicomTag* tag)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->SetIdentifierTag(id, tag->group, tag->element, tag->value);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  SetMetadata(void* payload,
+                                             int64_t id,
+                                             int32_t metadata,
+                                             const char* value)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->SetMetadata(id, metadata, value);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode  SetProtectedPatient(void* payload,
+                                                     int64_t id,
+                                                     int32_t isProtected)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->SetProtectedPatient(id, (isProtected != 0));
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode StartTransaction(void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->StartTransaction();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode RollbackTransaction(void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->RollbackTransaction();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode CommitTransaction(void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->CommitTransaction();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode Open(void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->Open();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode Close(void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->Close();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode GetDatabaseVersion(uint32_t* version,
+                                                   void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+      
+    try
+    {
+      *version = backend->GetDatabaseVersion();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+  static OrthancPluginErrorCode UpgradeDatabase(void* payload,
+                                                uint32_t  targetVersion,
+                                                OrthancPluginStorageArea* storageArea)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+      
+    try
+    {
+      backend->UpgradeDatabase(targetVersion, storageArea);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+    
+  static OrthancPluginErrorCode ClearMainDicomTags(void* payload,
+                                                   int64_t internalId)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+      
+    try
+    {
+      backend->ClearMainDicomTags(internalId);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+
+
+#if ORTHANC_PLUGINS_HAS_DATABASE_CONSTRAINT == 1
+  /* Use GetOutput().AnswerResource() */
+  static OrthancPluginErrorCode LookupResources(
+    OrthancPluginDatabaseContext* context,
+    void* payload,
+    uint32_t constraintsCount,
+    const OrthancPluginDatabaseConstraint* constraints,
+    OrthancPluginResourceType queryLevel,
+    uint32_t limit,
+    uint8_t requestSomeInstance)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_MatchingResource);
+
+    try
+    {
+      std::vector<Orthanc::DatabaseConstraint> lookup;
+      lookup.reserve(constraintsCount);
+
+      for (uint32_t i = 0; i < constraintsCount; i++)
+      {
+        lookup.push_back(Orthanc::DatabaseConstraint(constraints[i]));
+      }
+        
+      backend->LookupResources(*output, lookup, queryLevel, limit, (requestSomeInstance != 0));
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;
+  }
+#endif
+
+
+#if ORTHANC_PLUGINS_HAS_DATABASE_CONSTRAINT == 1
+  static OrthancPluginErrorCode CreateInstance(OrthancPluginCreateInstanceResult* target,
+                                               void* payload,
+                                               const char* hashPatient,
+                                               const char* hashStudy,
+                                               const char* hashSeries,
+                                               const char* hashInstance)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->CreateInstance(*target, hashPatient, hashStudy, hashSeries, hashInstance);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;      
+  }
+#endif
+
+
+#if ORTHANC_PLUGINS_HAS_DATABASE_CONSTRAINT == 1
+  static OrthancPluginErrorCode SetResourcesContent(
+    void* payload,
+    uint32_t countIdentifierTags,
+    const OrthancPluginResourcesContentTags* identifierTags,
+    uint32_t countMainDicomTags,
+    const OrthancPluginResourcesContentTags* mainDicomTags,
+    uint32_t countMetadata,
+    const OrthancPluginResourcesContentMetadata* metadata)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->SetResourcesContent(countIdentifierTags, identifierTags,
+                                   countMainDicomTags, mainDicomTags,
+                                   countMetadata, metadata);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;      
+  }
+#endif    
+
+    
+  // New primitive since Orthanc 1.5.2
+  static OrthancPluginErrorCode GetChildrenMetadata(OrthancPluginDatabaseContext* context,
+                                                    void* payload,
+                                                    int64_t resourceId,
+                                                    int32_t metadata)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_None);
+
+    try
+    {
+      std::list<std::string> values;
+      backend->GetChildrenMetadata(values, resourceId, metadata);
+
+      for (std::list<std::string>::const_iterator
+             it = values.begin(); it != values.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerString(backend->GetContext(),
+                                          output->GetDatabase(),
+                                          it->c_str());
+      }
+
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;      
+  }
+
+
+  // New primitive since Orthanc 1.5.2
+  static OrthancPluginErrorCode GetLastChangeIndex(int64_t* result,
+                                                   void* payload)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      *result = backend->GetLastChangeIndex();
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;      
+  }
+
+
+  // New primitive since Orthanc 1.5.2
+  static OrthancPluginErrorCode TagMostRecentPatient(void* payload,
+                                                     int64_t patientId)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+
+    try
+    {
+      backend->TagMostRecentPatient(patientId);
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;      
+  }
+   
+
+#if defined(ORTHANC_PLUGINS_VERSION_IS_ABOVE)      // Macro introduced in 1.3.1
+#  if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 5, 4)
+  // New primitive since Orthanc 1.5.4
+  static OrthancPluginErrorCode GetAllMetadata(OrthancPluginDatabaseContext* context,
+                                               void* payload,
+                                               int64_t resourceId)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_Metadata);
+
+    try
+    {
+      std::map<int32_t, std::string> result;
+      backend->GetAllMetadata(result, resourceId);
+
+      for (std::map<int32_t, std::string>::const_iterator
+             it = result.begin(); it != result.end(); ++it)
+      {
+        OrthancPluginDatabaseAnswerMetadata(backend->GetContext(),
+                                            output->GetDatabase(),
+                                            resourceId, it->first, it->second.c_str());
+      }
+        
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;      
+  }
+#  endif
+#endif
+   
+
+#if defined(ORTHANC_PLUGINS_VERSION_IS_ABOVE)      // Macro introduced in 1.3.1
+#  if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 5, 4)
+  // New primitive since Orthanc 1.5.4
+  static OrthancPluginErrorCode LookupResourceAndParent(OrthancPluginDatabaseContext* context,
+                                                        uint8_t* isExisting,
+                                                        int64_t* id,
+                                                        OrthancPluginResourceType* type,
+                                                        void* payload,
+                                                        const char* publicId)
+  {
+    IDatabaseBackend* backend = reinterpret_cast<IDatabaseBackend*>(payload);
+    std::unique_ptr<DatabaseBackendAdapterV2::Output> output(dynamic_cast<DatabaseBackendAdapterV2::Output*>(backend->CreateOutput()));
+    output->SetAllowedAnswers(DatabaseBackendAdapterV2::Output::AllowedAnswers_String);
+
+    try
+    {
+      std::string parent;
+      if (backend->LookupResourceAndParent(*id, *type, parent, publicId))
+      {
+        *isExisting = 1;
+
+        if (!parent.empty())
+        {
+          OrthancPluginDatabaseAnswerString(backend->GetContext(),
+                                            output->GetDatabase(),
+                                            parent.c_str());
+        }
+      }
+      else
+      {
+        *isExisting = 0;
+      }
+        
+      return OrthancPluginErrorCode_Success;
+    }
+    ORTHANC_PLUGINS_DATABASE_CATCH;      
+  }
+#  endif
+#endif
+   
+
+  IDatabaseBackendOutput* DatabaseBackendAdapterV2::Factory::CreateOutput()
+  {
+    return new Output(context_, database_);
+  }
+
+
+  void DatabaseBackendAdapterV2::Register(OrthancPluginContext* context,
+                                          IDatabaseBackend& backend)
+  {
+    OrthancPluginDatabaseBackend  params;
+    memset(&params, 0, sizeof(params));
+
+    OrthancPluginDatabaseExtensions  extensions;
+    memset(&extensions, 0, sizeof(extensions));
+
+    params.addAttachment = AddAttachment;
+    params.attachChild = AttachChild;
+    params.clearChanges = ClearChanges;
+    params.clearExportedResources = ClearExportedResources;
+    params.createResource = CreateResource;
+    params.deleteAttachment = DeleteAttachment;
+    params.deleteMetadata = DeleteMetadata;
+    params.deleteResource = DeleteResource;
+    params.getAllPublicIds = GetAllPublicIds;
+    params.getChanges = GetChanges;
+    params.getChildrenInternalId = GetChildrenInternalId;
+    params.getChildrenPublicId = GetChildrenPublicId;
+    params.getExportedResources = GetExportedResources;
+    params.getLastChange = GetLastChange;
+    params.getLastExportedResource = GetLastExportedResource;
+    params.getMainDicomTags = GetMainDicomTags;
+    params.getPublicId = GetPublicId;
+    params.getResourceCount = GetResourceCount;
+    params.getResourceType = GetResourceType;
+    params.getTotalCompressedSize = GetTotalCompressedSize;
+    params.getTotalUncompressedSize = GetTotalUncompressedSize;
+    params.isExistingResource = IsExistingResource;
+    params.isProtectedPatient = IsProtectedPatient;
+    params.listAvailableMetadata = ListAvailableMetadata;
+    params.listAvailableAttachments = ListAvailableAttachments;
+    params.logChange = LogChange;
+    params.logExportedResource = LogExportedResource;
+    params.lookupAttachment = LookupAttachment;
+    params.lookupGlobalProperty = LookupGlobalProperty;
+    params.lookupIdentifier = NULL;    // Unused starting with Orthanc 0.9.5 (db v6)
+    params.lookupIdentifier2 = NULL;   // Unused starting with Orthanc 0.9.5 (db v6)
+    params.lookupMetadata = LookupMetadata;
+    params.lookupParent = LookupParent;
+    params.lookupResource = LookupResource;
+    params.selectPatientToRecycle = SelectPatientToRecycle;
+    params.selectPatientToRecycle2 = SelectPatientToRecycle2;
+    params.setGlobalProperty = SetGlobalProperty;
+    params.setMainDicomTag = SetMainDicomTag;
+    params.setIdentifierTag = SetIdentifierTag;
+    params.setMetadata = SetMetadata;
+    params.setProtectedPatient = SetProtectedPatient;
+    params.startTransaction = StartTransaction;
+    params.rollbackTransaction = RollbackTransaction;
+    params.commitTransaction = CommitTransaction;
+    params.open = Open;
+    params.close = Close;
+
+    extensions.getAllPublicIdsWithLimit = GetAllPublicIdsWithLimit;
+    extensions.getDatabaseVersion = GetDatabaseVersion;
+    extensions.upgradeDatabase = UpgradeDatabase;
+    extensions.clearMainDicomTags = ClearMainDicomTags;
+    extensions.getAllInternalIds = GetAllInternalIds;     // New in Orthanc 0.9.5 (db v6)
+    extensions.lookupIdentifier3 = LookupIdentifier3;     // New in Orthanc 0.9.5 (db v6)
+
+    bool performanceWarning = true;
+
+#if defined(ORTHANC_PLUGINS_VERSION_IS_ABOVE)         // Macro introduced in Orthanc 1.3.1
+#  if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 4, 0)
+    extensions.lookupIdentifierRange = LookupIdentifierRange;    // New in Orthanc 1.4.0
+#  endif
+#endif
+
+#if ORTHANC_PLUGINS_HAS_DATABASE_CONSTRAINT == 1
+    // Optimizations brought by Orthanc 1.5.2
+    extensions.lookupResources = LookupResources;          // Fast lookup
+    extensions.setResourcesContent = SetResourcesContent;  // Fast setting tags/metadata
+    extensions.getChildrenMetadata = GetChildrenMetadata;
+    extensions.getLastChangeIndex = GetLastChangeIndex;
+    extensions.tagMostRecentPatient = TagMostRecentPatient;
+
+    if (backend.HasCreateInstance())
+    {
+      extensions.createInstance = CreateInstance;          // Fast creation of resources
+    }
+#endif      
+
+#if defined(ORTHANC_PLUGINS_VERSION_IS_ABOVE)      // Macro introduced in 1.3.1
+#  if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 5, 4)
+    // Optimizations brought by Orthanc 1.5.4
+    extensions.lookupResourceAndParent = LookupResourceAndParent;
+    extensions.getAllMetadata = GetAllMetadata;
+    performanceWarning = false;
+#  endif
+#endif
+
+    if (performanceWarning)
+    {
+      char info[1024];
+      sprintf(info, 
+              "Performance warning: The database index plugin was compiled "
+              "against an old version of the Orthanc SDK (%d.%d.%d): "
+              "Consider upgrading to version %d.%d.%d of the Orthanc SDK",
+              ORTHANC_PLUGINS_MINIMAL_MAJOR_NUMBER,
+              ORTHANC_PLUGINS_MINIMAL_MINOR_NUMBER,
+              ORTHANC_PLUGINS_MINIMAL_REVISION_NUMBER,
+              ORTHANC_OPTIMAL_VERSION_MAJOR,
+              ORTHANC_OPTIMAL_VERSION_MINOR,
+              ORTHANC_OPTIMAL_VERSION_REVISION);
+
+      OrthancPluginLogWarning(context, info);
+    }
+
+    OrthancPluginDatabaseContext* database =
+      OrthancPluginRegisterDatabaseBackendV2(context, &params, &extensions, &backend);
+    if (!context)
+    {
+      throw std::runtime_error("Unable to register the database backend");
+    }
+
+    backend.SetOutputFactory(new Factory(context, database));
+  }
+}