lgrFileInput.h

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/******************************************************************************
** Copyright (c) 1992-2010 VT MAK
** All rights reserved.
******************************************************************************/


#ifndef lgrFileInput_H_
#define lgrFileInput_H_

#include "lgrCore.h"
#include "messageInput.h"
#include "filePosition.h"

namespace MAKLogger
{

   class DtAbsoluteTime;
   class DtLoggerPlaybackFile;
   class DtLgrEntityTracker;

   class DT_DLL_LGRCORE DtLgrFileInput : public DtMessageInput
   {
   
   protected:
      DtLgrFileInput();

   public:
      virtual ~DtLgrFileInput();
   
   private:
      DtLgrFileInput(const DtLgrFileInput&);
      DtLgrFileInput& operator=(const DtLgrFileInput&);
   public:  

      virtual const DtLoggerPlaybackFile* playbackFile() const = 0;

      virtual void setReadBufferSize(size_t) = 0;

      virtual size_t getReadBufferSize() const = 0;

      virtual bool isCheckpointNecessary(DtAbsoluteTime currentTime,DtAbsoluteTime newTime) = 0;

      virtual void seekToPreviousCheckpoint(DtAbsoluteTime timeToJumpBefore) = 0;

      virtual void seekToNextCheckpoint(DtAbsoluteTime currentTime) = 0;

      virtual double peekCurrentPacketTime() = 0;

      virtual int peekCurrentPacketType() = 0;

      virtual size_t peekCurrentPacketSize() = 0;

      virtual bool recoverLastPacket() = 0;

      virtual const DtString& filename() const = 0;

      virtual DtFilePosition fileSize() const = 0;  

      virtual DtFilePosition currentPosition() const = 0;

      virtual DtAbsoluteTime firstMessageTime() const = 0;

      virtual DtAbsoluteTime lastMessageTime() const = 0;

      virtual DtRelativeTime duration() const = 0;

      virtual DtAbsoluteTime lastReadTime() const = 0;

      virtual DtLgrEntityTracker* entityTracker() const = 0;
   };

}

#endif