#ifndef DBICONFIGSTREAM_H
#define DBICONFIGSTREAM_H

/**
 *
 * $Id: IDbiConfigStream.hxx,v 1.1 2011/01/18 05:49:19 finch Exp $
 *
 * \class COMET::IDbiConfigStream
 *
 *
 * \brief
 * <b>Concept</b>  I/O of configuration data and equivalent IDbiRegistry objs.
 *
 * \brief
 * <b>Purpose</b> Used to fill/store IDbiRegistry objects.
 *
 * Contact: A.Finch@lancaster.ac.uk
 *
 *
 */

#include <string>

#include "IDbi.hxx"
#include "IDbiConfigSet.hxx"
#include "IDbiResultSetHandle.hxx"
#include "IDbiRegistry.hxx"
#include "IVldContext.hxx"

namespace COMET {
class IDbiConfigStream;
class IDbiFieldType;
}
namespace COMET{
class IDbiRegistry;
}
#include <iosfwd>

std::ostream& operator<<(std::ostream& s, const COMET::IDbiConfigStream& cfStream);

namespace COMET {
class IDbiConfigStream
{


public:

static      COMET::IVldContext fgDefaultContext;

// Constructors and destructors.
           IDbiConfigStream();
           IDbiConfigStream(const std::string& SoftwName,
                           const std::string& ConfigName="default",
                           COMET::IVldContext vc = IDbiConfigStream::fgDefaultContext,
                           IDbi::Task task=0,
                           const std::string& tableName="SOFTWARE_CONFIGURATION");
  virtual ~IDbiConfigStream();

// State testing member functions
  const COMET::IDbiConfigStream& operator>>(IDbiRegistry* reg);
  const IDbiConfigSet* GetConfigSet() const { return fCFSet; }

// State changing member functions

  COMET::IDbiConfigStream& operator<<(const IDbiRegistry* reg);
               Bool_t IsEmpty() { return fCFSet == 0; }
      IDbiValidityRec& GetValidityRec() { return fVRec; }
               Bool_t Write(UInt_t dbNo = 0,
                            const std::string& logComment = "",
                            Bool_t localTest = false);

private:

  IDbiConfigStream(const IDbiConfigStream&);  // Not implimented

// Data members

  ///  Pointer to the associated configuration set.  May point either
  ///  to a row of fCFSetTable (or 0) or, after operator <<, to fCFSetModified
  const IDbiConfigSet*
                 fCFSet;

  /// Pointer to ConfigSet table
  COMET::IDbiResultSetHandle<IDbiConfigSet>
                 fCFSetTable;

  /// Local COMET::IDbiConfigSet (empty until/unless filled using operator <<).
    IDbiConfigSet fCFSetModified;

  /// Associated validity rec (used when writing back to the database).
  IDbiValidityRec fVRec;

  /// Name of the configuration set
  std::string    fConfigName;

  /// Name of the software system to be configured
  std::string    fSoftwName;

   ClassDef(IDbiConfigStream,0)  // Input/output stream of configuration data

};
};

#endif  // DBICONFIGSTREAM_H