--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Common/Query.cpp	Wed Jul 04 08:16:29 2018 +0200
@@ -0,0 +1,178 @@
+/**
+ * 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 "Query.h"
+
+#include <Core/Logging.h>
+#include <Core/OrthancException.h>
+
+#include <boost/regex.hpp>
+
+namespace OrthancDatabases
+{
+  class Query::Token : public boost::noncopyable
+  {
+  private:
+    bool         isParameter_;
+    std::string  content_;
+
+  public:
+    Token(bool isParameter,
+          const std::string& content) :
+      isParameter_(isParameter),
+      content_(content)
+    {
+    }
+
+    bool IsParameter() const
+    {
+      return isParameter_;
+    }
+
+    const std::string& GetContent() const
+    {
+      return content_;
+    }
+  };
+
+
+  void Query::Setup(const std::string& sql)
+  {
+    boost::regex regex("\\$\\{(.*?)\\}");
+
+    std::string::const_iterator last = sql.begin();
+    boost::sregex_token_iterator it(sql.begin(), sql.end(), regex, 0);
+    boost::sregex_token_iterator end;
+
+    while (it != end)
+    {
+      if (last != it->first)
+      {
+        tokens_.push_back(new Token(false, std::string(last, it->first)));
+      }
+
+      std::string parameter = *it;
+      assert(parameter.size() >= 3);
+      parameter = parameter.substr(2, parameter.size() - 3);
+
+      tokens_.push_back(new Token(true, parameter));
+      parameters_[parameter] = ValueType_Null;
+
+      last = it->second;
+
+      ++it;
+    }
+
+    if (last != sql.end())
+    {
+      tokens_.push_back(new Token(false, std::string(last, sql.end())));
+    }
+  }
+
+
+  Query::Query(const std::string& sql) :
+    readOnly_(false)
+  {
+    Setup(sql);
+  }
+
+
+  Query::Query(const std::string& sql,
+               bool readOnly) :
+    readOnly_(readOnly)
+  {
+    Setup(sql);
+  }
+
+  
+  Query::~Query()
+  {
+    for (size_t i = 0; i < tokens_.size(); i++)
+    {
+      assert(tokens_[i] != NULL);
+      delete tokens_[i];
+    }
+  }
+
+
+  bool Query::HasParameter(const std::string& parameter) const
+  {
+    return parameters_.find(parameter) != parameters_.end();
+  }
+
+  
+  ValueType Query::GetType(const std::string& parameter) const
+  {
+    Parameters::const_iterator found = parameters_.find(parameter);
+
+    if (found == parameters_.end())
+    {
+      LOG(ERROR) << "Inexistent parameter in a SQL query: " << parameter;
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem);
+    }
+    else
+    {
+      return found->second;
+    }
+  }
+
+
+  void Query::SetType(const std::string& parameter,
+                      ValueType type)
+  {
+    Parameters::iterator found = parameters_.find(parameter);
+
+    if (found == parameters_.end())
+    {
+      LOG(ERROR) << "Ignoring inexistent parameter in a SQL query: " << parameter;
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
+    }
+    else
+    {
+      found->second = type;
+    }
+  }
+
+  
+  void Query::Format(std::string& result,
+                     IParameterFormatter& formatter) const
+  {
+    result.clear();
+
+    for (size_t i = 0; i < tokens_.size(); i++)
+    {
+      assert(tokens_[i] != NULL);
+
+      const std::string& content = tokens_[i]->GetContent();
+
+      if (tokens_[i]->IsParameter())
+      {
+        std::string parameter;
+        formatter.Format(parameter, content, GetType(content));
+        result += parameter;
+      }
+      else
+      {
+        result += content;
+      }
+    }
+  }
+}