DbOption.h

Go to the documentation of this file.

/*
  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
*/
 
// $Id: DbOption.h 726071 2016-02-25 09:23:05Z krasznaa $
//====================================================================
//  DbOption class definitions
//--------------------------------------------------------------------
//
//  Package    : StorageSvc  (The POOL project)
//  @author      M.Frank
//====================================================================
#ifndef POOL_DBOPTION_H
#define POOL_DBOPTION_H 1
 
// Framework include files
#include "StorageSvc/DbColumn.h"
#include "GaudiKernel/StatusCode.h"
 
/*
 *  POOL namespace declaration
 */
namespace pool  {

  class DbOption    {
  public:
    union Value  {
      long long int     val_long;
      int               val_int;
      double            val_double;
      void*             val_pvoid;
      char*             val_pchar;
    };

    Value             m_value{};
    DbColumn::Type    m_type;
    std::string       m_name;
    std::string       m_opt;

    StatusCode i_setValue(const std::type_info& typ, const void* value);
    StatusCode i_getValue(const std::type_info& typ, void* value) const;
 
  public:
    template <class T> DbOption(const std::string& nam, 
                                const std::string& opt, 
                                T value)
    : m_type(DbColumn::UNKNOWN), m_name(nam), m_opt(opt)
    { i_setValue(typeid(T), &value).ignore();               }

    DbOption(const std::string& nam, const std::string& opt="");
    virtual ~DbOption()                 {                   }
    const std::string& option() const   { return m_opt;     }
    const std::string& name() const     { return m_name;    }
    DbColumn::Type type() const         { return m_type;    }
    template<class T> StatusCode _setValue(T value)
    { return i_setValue(typeid(T), &value);                 }

    template<class T> StatusCode _getValue(T& value) const
    { return i_getValue(typeid(T), &value);                 }

    std::string typeName() const;
    StatusCode setValue(DbColumn::Type typ, const void* value);
    StatusCode getValue(DbColumn::Type typ, void* value) const;
  };
}       // End namespace pool
#endif  // POOL_DbOption_H