ValueChangeListener.h

#ifndef _RDA_VALUE_CHANGE_LISTENER_
#define _RDA_VALUE_CHANGE_LISTENER_
//
// 22 Mar 2001, N.Trofimov
// 04 Sep 2001 NNT
//    - added fast update methods
// 09 Dec 2002 NNT for RDA-2.0
//    - added getClientInfo
// 09 Aug 2005 KK  - added fast update for composite data (multiple tags)
//
#include <rda/IOPoint.h>
#include <rda/Exception.h>
#include <rda/Data.h>
#include <rda/ClientInfo.h>

class rdaValueChangeListener
{
   public:
   
   virtual const rdaClientInfo* getClientInfo() = 0;

   virtual bool isOnChange() = 0;

      virtual void  valueUpdated(const rdaData& oldValue, const rdaData& newValue,
                         bool hasChanged) = 0;

      virtual void ioFailed(const rdaIOError& error) = 0;

     
//
// Fast update methods
//

      static void flush(const rdaData& stamp);


      virtual void valueUpdated(bool value, bool hasChanged) = 0;
      virtual void valueUpdated(signed char value, bool hasChanged) = 0;
      virtual void valueUpdated(short value, bool hasChanged) = 0;
      virtual void valueUpdated(long value, bool hasChanged) = 0;
      virtual void valueUpdated(longlong value, bool hasChanged) = 0;
      virtual void valueUpdated(float value, bool hasChanged) = 0;
      virtual void valueUpdated(double value, bool hasChanged) = 0;
     virtual void valueUpdated(const char* value, bool hasChanged) = 0;

      virtual void
      valueUpdated(const bool* value, unsigned long size, bool hasChanged) = 0;
     virtual void
     valueUpdated(const signed char* value, unsigned long size, bool hasChanged) = 0;
      virtual void
      valueUpdated(const short* value, unsigned long size, bool hasChanged) = 0;
      virtual void
      valueUpdated(const long* value, unsigned long size, bool hasChanged) = 0;
      virtual void
      valueUpdated(const longlong* value, unsigned long size, bool hasChanged) = 0;
      virtual void
      valueUpdated(const float* value, unsigned long size, bool hasChanged) = 0;
      virtual void
      valueUpdated(const double* value, unsigned long size, bool hasChanged) = 0;
      virtual void
      valueUpdated(const char** value, unsigned long size, bool hasChanged) = 0;
      virtual void 
      valueUpdated(const rdaData& value, bool hasChanged) = 0;              
      virtual void
      ioFailed(const char* cat, int code, const char* msg, bool newError) = 0;
           

   protected:

      rdaValueChangeListener() {}
      virtual ~rdaValueChangeListener() {}

};

#endif

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