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TDBConnection.hh

#ifndef _T_DB_CONNECTION_HH
#define _T_DB_CONNECTION_HH

#include <libpq-fe.h>
#include "TString.hh"
#include "TDBResult.hh"


class TDBConnection
{
public:
  
  inline bool IsValid () { return myConn; }
  
  inline TString& ErrorMessage () { return myErrorMessage; }
  
  TDBResult* Execute (const TString& command);
  
  
private:
  
  /* Only the connection manager can create connections. */
  friend class TDBConnectionManager;

  /* FIXME: No copying for now! */
  TDBConnection (const TDBConnection&);
  TDBConnection& operator=(const TDBConnection&);
  
  TDBConnection ();
  
  ~TDBConnection () { Close (); }
  
  void Open (const TString &username,
             const TString &password,
             const TString &database,
             const TString &host,
             const TString &port);
  
  void Close ();
  
  
  /* PostgreSQL connection */
  PGconn* myConn;
  
  /* Contains error message */
  TString myErrorMessage;
};

#endif // _T_DB_CONNECTION_HH

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