/home/tobi/workspace/solarpowerlog/src/interfaces/PersistanceStorage/QueryHelper.h

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/*
 * _QueryHelper.h
 *
 *  Created on: Feb 7, 2010
 *      Author: tobi
 */

#ifndef _QUERYHELPER_H_
#define _QUERYHELPER_H_

#include <dbixx/dbixx.h>
#include <map>
#include <vector>
#include <boost/any.hpp>

#include "interfaces/PersistanceStorage/IPersistanceStorage.h"

class QueryHelper
{

     friend class IPersistanceStorage;

protected:
     QueryHelper(dbixx::session *session, std::map<std::string /*identifier*/,
               dbtypes /*type*/> *x);

public:
     ~QueryHelper();

     int DoQuery(std::vector<std::string> &what, std::string &where);

     std::map<std::string, boost::any>
     GetNextResult(void);

     //   std::map<std::string, boost::any> value_mapping;

private:
     std::string table;

     // Storing the association between type and table entry.
     std::map<std::string, dbtypes /*type*/> *table_spec;

     // These are the fields in for the last query.
     std::vector<std::string> what;

     // the database session.
     dbixx::session *session;

     // the results object of the dbixx abstraction layer.
     dbixx::result *r;

};

#endif /* _QUERYHELPER_H_ */