HTColumn.h

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//--------------------------------------------------------------------------
// File and Version Information:
//  $Id: HTColumn.h,v 1.2 2009/12/23 02:59:56 zhangy Exp $
//
// Description:
//  Class HTColumn.
//      Base class for the ntuple columns. This is abstract one, all
//      real things will be implemented it the classes for specific types.
//
// Environment:
//  Software developed for the BaBar Detector at the SLAC B-Factory.
//
// Author List:
//  Salnikov
//
// Copyright Information:
//  Copyright (C) 1997  Saclay
// 
// History:
//  Migration for BESIII MDC
//
//------------------------------------------------------------------------
 
#ifndef HTColumn_H
#define HTColumn_H
 
 
//-------------
// C Headers --
//-------------
extern "C" {
}
 
//---------------
// C++ Headers --
//---------------
#include <iostream>
#include <string>
 
//----------------------
// Base Class Headers --
//----------------------
 
//-------------------------------
// Collaborating Class Headers --
//-------------------------------
 
//------------------------------------
// Collaborating Class Declarations --
//------------------------------------
class HTColumnAcceptor ;
 
//      ---------------------
//      -- Class Interface --
//      ---------------------
 
class HTColumn {
 
  //--------------------
  // Declarations     --
  //--------------------
 
  // Typedefs, consts, and enums
 
  //--------------------
  // Instance Members --
  //--------------------
 
public:
 
  // Constructors
  HTColumn( const std::string& label, 
        const std::string& block=std::string(), 
        const std::string& indexLabel=std::string() );
  
  // Copy Constructor
  HTColumn( const HTColumn& );
 
  // Destructor
  virtual ~HTColumn( );
 
  // Operators
  HTColumn& operator=(const HTColumn&) ;
    
  // Selectors (const)
  virtual const std::string& label() const ;
  virtual const std::string& block() const ;
  virtual const std::string& indexLabel() const ;
 
  // typeinfo
  virtual  const std::string& typeName() const = 0 ;
 
  // modifiers
  virtual void clearData() = 0 ;
 
  virtual void print(/*std::ostream& out*/) const ;
 
protected:
 
  // Helper functions
 
private:
 
  // Friends
 
  // Data members
  std::string _label ;
  std::string _block ;
  std::string _indexLabel ;
 
};
 
#endif // HTColumn_H