RawDataReader.h

// -*- c++ -*-

#ifndef __RAW_DATA_READER_H__
#define __RAW_DATA_READER_H__

// tools
#include "tools/ToolsConfig.h"
#include "tools/AutoPtr.h"

// storage
#include "storage/DataReader.h"
#include "storage/CtrlInfo.h"


class RawDataReader : public DataReader
{
public:

  RawDataReader(Index &index);

  virtual ~RawDataReader();

  virtual const RawValue::Data *find(const stdString &channel_name,
                                     const epicsTime *start);
    
  virtual const std::string& getName() const;  

  virtual const RawValue::Data *next();

  virtual const RawValue::Data *get() const;
    
  virtual DbrType getType() const;

  virtual DbrCount getCount() const;

  virtual const CtrlInfo& getInfo() const;

  virtual bool changedType();

  virtual bool changedInfo();

public:

  struct PrvData {

    void init();

    AutoPtr<Index::Result>    index_result;  

    AutoPtr<RTree::Datablock> datablock;
    
    std::string channel_name;
    
    // Meta-info for current sample  
  
    DbrType dbr_type;          
    DbrCount dbr_count;        
    CtrlInfo ctrl_info;        
    bool type_changed;         
    bool ctrl_info_changed;    
    double period;             

    RawValueAutoPtr data;
 
  };

protected:

  bool findDataBlock(const std::string& channel_name,
                     const epicsTime* start);

protected:

  // Index
  Index& index;

  PrvData prvData;

  DataReader* dataReader;

};


#endif