GUID.hpp

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#pragma once

#include <util/types.h>

#include <io/ByteBuffer.hpp>

namespace dcrud {

   class Cache;

   class GUID {
   public:

      static const unsigned int SIZE = 4 + 4;

      static GUID unserialize( io::ByteBuffer & buffer );

      GUID() :
         _publisher( 0 ),
         _instance ( 0 )
      {}

      GUID( const GUID & right ) :
         _publisher( right._publisher ),
         _instance ( right._instance  )
      {}

      GUID & operator = ( const GUID & right ) {
         _publisher = right._publisher;
         _instance  = right._instance;
         return *this;
      }

      bool operator < ( const GUID & right ) const {
         return compareTo( right ) < 0;
      }

      bool isShared() const {
         return _instance != 0;
      }

      int compareTo( const GUID & right ) const;

      void set( const GUID & id );

      void serialize( io::ByteBuffer & buffer ) const;

      std::string toString( void ) const;

   private:

      unsigned int _publisher;
      unsigned int _instance;

      friend class Cache;
   };
}