Include/EgtExecMgr.h

//----------------------------------------------------------------------------
//  EgalTech 2014-2014
//----------------------------------------------------------------------------
// File : EgtExecMgr.h       Data : 21.03.14        Versione : 1.5c3
// Contenuto : Classe ExecManager.
//             Per facilitare l'implementazione di ICmdExecutor.
//
//
// Modifiche : 21.03.14 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

#pragma once

#include <string>
#include <unordered_map>


//----------------------------------------------------------------------------
enum { ER_ERR = 0, ER_OK = 1, ER_MISSING = 2 } ;

//----------------------------------------------------------------------------
template <class T>
class ExecManager
{
   public :
      typedef bool ( T::*Exec) ( const std::string& sCmd2, const STRVECTOR& vsParams) ;

   public :
      bool Init( int nBuckets)
              { m_pExecMap.clear() ;
                m_pExecMap.rehash( nBuckets) ;
                return true ; }

      bool Insert( const std::string& sName, Exec eFunc)
             { return m_pExecMap.insert( std::pair< std::string, Exec>( sName, eFunc)).second ; }

      int Execute( T& Executor, const std::string& sCmd1, const std::string& sCmd2, const STRVECTOR& vsParams)
             { const auto Iter = m_pExecMap.find( sCmd1) ;
               if ( Iter != m_pExecMap.end()  &&  (Iter->second) != nullptr) {
                  if ( ( Executor.*(Iter->second))( sCmd2, vsParams))
                     return ER_OK ;
                  else
                     return ER_ERR ;
               }
               else
                  return ER_MISSING ; }

   private :
      typedef std::unordered_map< std::string, Exec> KeyExecMap ;
      KeyExecMap m_pExecMap ;
} ;