TiledFileHelper.h

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// # TiledFileHelper.h: Helper class for tiled access to an array in a file
// # Copyright (C) 2001,2002
// # Associated Universities, Inc. Washington DC, USA.
// #
// # This library is free software; you can redistribute it and/or modify it
// # under the terms of the GNU Library General Public License as published by
// # the Free Software Foundation; either version 2 of the License, or (at your
// # option) any later version.
// #
// # This library is distributed in the hope that it will be useful, but WITHOUT
// # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
// # License for more details.
// #
// # You should have received a copy of the GNU Library General Public License
// # along with this library; if not, write to the Free Software Foundation,
// # Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
// #
// # Correspondence concerning AIPS++ should be addressed as follows:
// #        Internet email: casa-feedback@nrao.edu.
// #        Postal address: AIPS++ Project Office
// #                        National Radio Astronomy Observatory
// #                        520 Edgemont Road
// #                        Charlottesville, VA 22903-2475 USA
 
#ifndef TABLES_TILEDFILEHELPER_H
#define TABLES_TILEDFILEHELPER_H
 
// # Includes
#include <casacore/casa/aips.h>
#include <casacore/tables/DataMan/TiledStMan.h>
#include <casacore/tables/Tables/TableDesc.h>
 
namespace casacore {  // # NAMESPACE CASACORE - BEGIN
 
// <summary>
// Helper class for tiled access to an array in a file.
// </summary>
 
// <use visibility=local>
 
// <reviewed reviewer="" date="" tests="tTiledFileAccess.cc">
// </reviewed>
 
// <prerequisite>
// # Classes you should understand before using this one.
//   <li> Description of Tiled Storage Manager in module file
//        <linkto module=Tables:TiledStMan>Tables.h</linkto>
// </prerequisite>
 
// <synopsis>
// TiledFileHelper is a helper class for class
// <linkto class=TiledFileAccess>TiledFileAccess</linkto>.
// It sets up a table description containing one array column
// to make it possible to use the
// <linkto class=TiledStMan>tiled storage manager</linkto>
// to access an array in an arbitrary file.
// </synopsis>
 
// <motivation>
// This class was created to be able to read an image in a FITS file.
// </motivation>
 
// # <todo asof="$DATE:$">
// # A List of bugs, limitations, extensions or planned refinements.
// # </todo>
 
class TiledFileHelper : public TiledStMan {
 public:
  // Create a TiledFileHelper object.
  // Tell if the data is stored in big or little endian canonical format.
  TiledFileHelper(const String& fileName, const IPosition& shape, DataType dtype, const TSMOption&,
                  Bool writable, Bool bigEndian);
 
  ~TiledFileHelper();
 
  // Forbid copy constructor.
  TiledFileHelper(const TiledFileHelper&) = delete;
 
  // Forbid assignment.
  TiledFileHelper& operator=(const TiledFileHelper&) = delete;
 
  virtual const TableDesc& getDesc() const;
 
  TSMFile* file() { return fileSet_p[0]; }
 
  // Return the class name.
  virtual String dataManagerType() const;
 
  // These functions are pure virtual, but not needed here.
  // They throw an exception.
  // <group>
  virtual DataManager* clone() const;
  virtual Bool flush(AipsIO&, Bool);
  virtual void create64(rownr_t);
  virtual TSMCube* getHypercube(rownr_t);
  virtual TSMCube* getHypercube(rownr_t, IPosition&);
  virtual void readHeader(rownr_t, Bool);
  // </group>
 
 private:
  TableDesc itsDesc;
};
 
}  // namespace casacore
 
#endif