--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Plugins/Samples/Common/SimplifiedOrthancDataset.cpp	Fri Nov 25 16:11:44 2016 +0100
@@ -0,0 +1,155 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, 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/>.
+ **/
+
+
+#include "SimplifiedOrthancDataset.h"
+
+#include "OrthancPluginCppWrapper.h"
+
+#include <json/reader.h>
+
+namespace OrthancPlugins
+{
+  void SimplifiedOrthancDataset::Parse(const std::string& source)
+  {
+    Json::Reader reader;
+
+    if (!reader.parse(source, root_) ||
+        root_.type() != Json::objectValue)
+    {
+      ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
+    }
+  }
+
+
+  const Json::Value* SimplifiedOrthancDataset::LookupPath(const DicomPath& path) const
+  {
+    const Json::Value* content = &root_;
+                                  
+    for (unsigned int depth = 0; depth < path.GetPrefixLength(); depth++)
+    {
+      const char* name = path.GetPrefixTag(depth).GetName();
+      if (content->type() != Json::objectValue)
+      {
+        ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
+      }
+
+      if (!content->isMember(name))
+      {
+        return NULL;
+      }
+
+      const Json::Value& sequence = (*content) [name];
+      if (sequence.type() != Json::arrayValue)
+      {
+        ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
+      }
+
+      size_t index = path.GetPrefixIndex(depth);
+      if (index >= sequence.size())
+      {
+        return NULL;
+      }
+      else
+      {
+        content = &sequence[static_cast<Json::Value::ArrayIndex>(index)];
+      }
+    }
+
+    const char* name = path.GetFinalTag().GetName();
+
+    if (content->type() != Json::objectValue)
+    {
+      ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
+    }
+    if (!content->isMember(name))
+    {
+      return NULL;
+    }
+    else
+    {
+      return &((*content) [name]);
+    }
+  }
+
+
+  SimplifiedOrthancDataset::SimplifiedOrthancDataset(IOrthancConnection& orthanc,
+                                                     const std::string& uri)
+  {
+    std::string content;
+    orthanc.RestApiGet(content, uri);
+    Parse(content);
+  }
+
+
+  bool SimplifiedOrthancDataset::GetStringValue(std::string& result,
+                                                const DicomPath& path) const
+  {
+    const Json::Value* value = LookupPath(path);
+
+    if (value == NULL)
+    {
+      return false;
+    }
+    else if (value->type() != Json::stringValue)
+    {
+      ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
+    }
+    else
+    {
+      result = value->asString();
+      return true;
+    }
+  }
+
+
+  bool SimplifiedOrthancDataset::GetSequenceSize(size_t& size,
+                                                 const DicomPath& path) const
+  {
+    const Json::Value* sequence = LookupPath(path);
+
+    if (sequence == NULL)
+    {
+      // Inexistent path
+      return false;
+    }
+    else if (sequence->type() != Json::arrayValue)
+    {
+      // Not a sequence
+      ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
+    }
+    else
+    {
+      size = sequence->size();
+      return true;
+    }
+  }
+}