//# TiledFileHelper.cc: Helper class for tiled access to an array in a file
//# Copyright (C) 2001,2002,2003
//# 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: aips2-request@nrao.edu.
//#        Postal address: AIPS++ Project Office
//#                        National Radio Astronomy Observatory
//#                        520 Edgemont Road
//#                        Charlottesville, VA 22903-2475 USA
//#
//# $Id$


#include <casacore/tables/DataMan/TiledFileHelper.h>
#include <casacore/tables/DataMan/TSMFile.h>
#include <casacore/tables/DataMan/TSMOption.h>
#include <casacore/tables/Tables/ArrColDesc.h>
#include <casacore/tables/Tables/TableError.h>
#include <casacore/casa/Arrays/Vector.h>


namespace casacore { //# NAMESPACE CASACORE - BEGIN

TiledFileHelper::TiledFileHelper (const String& fileName,
				  const IPosition& shape,
				  DataType dtype,
                                  const TSMOption& tsmOption,
				  Bool writable,
				  Bool bigEndian)
  : TiledStMan ("TiledFileHelper",
                std::max(0, tsmOption.maxCacheSizeMB()) * 1024*1024)
{
  // TSM is used on an existing file. So set optional default accordingly.
  TSMOption tsmOpt(tsmOption);
  tsmOpt.fillOption (False);
  // Set info in parent TiledStMan object.
  setEndian (bigEndian);
  setTsmOption (tsmOpt);
  switch (dtype) {
  case TpBool:
    itsDesc.addColumn (ArrayColumnDesc<Bool> ("DATA", shape,
					      ColumnDesc::FixedShape));
    break;
  case TpUChar:
    itsDesc.addColumn (ArrayColumnDesc<uChar> ("DATA", shape,
					      ColumnDesc::FixedShape));
    break;
  case TpShort:
    itsDesc.addColumn (ArrayColumnDesc<Short> ("DATA", shape,
					       ColumnDesc::FixedShape));
    break;
  case TpInt:
    itsDesc.addColumn (ArrayColumnDesc<Int> ("DATA", shape,
					     ColumnDesc::FixedShape));
    break;
  case TpFloat:
    itsDesc.addColumn (ArrayColumnDesc<Float> ("DATA", shape,
					       ColumnDesc::FixedShape));
    break;
  case TpDouble:
    itsDesc.addColumn (ArrayColumnDesc<Double> ("DATA", shape,
						ColumnDesc::FixedShape));
    break;
  case TpComplex:
    itsDesc.addColumn (ArrayColumnDesc<Complex> ("DATA", shape,
						 ColumnDesc::FixedShape));
    break;
  case TpDComplex:
    itsDesc.addColumn (ArrayColumnDesc<DComplex> ("DATA", shape,
						  ColumnDesc::FixedShape));
    break;
  default:
    throw TableError ("TiledFileHelper: invalid data type");
  }
  createDirArrColumn ("DATA", dtype, "");
  TiledStMan::setup(0);
  fileSet_p[0] = new TSMFile (fileName, writable, tsmOpt);
}

TiledFileHelper::~TiledFileHelper()
{}

const TableDesc& TiledFileHelper::getDesc() const
{
  return itsDesc;
}


String TiledFileHelper::dataManagerType() const
{
  return "TiledFileHelper";
}

DataManager* TiledFileHelper::clone() const
{
  throw AipsError ("TileFileHelper::clone - not implemented");
}
Bool TiledFileHelper::flush (AipsIO&, Bool)
{
  throw AipsError ("TileFileHelper::flush - not implemented");
  return False;
}
void TiledFileHelper::create64 (rownr_t)
{
  throw AipsError ("TileFileHelper::create64 - not implemented");
}
TSMCube* TiledFileHelper::getHypercube (rownr_t)
{
  throw AipsError ("TileFileHelper::getHypercube - not implemented");
  return 0;
}
TSMCube* TiledFileHelper::getHypercube (rownr_t, IPosition&)
{
  throw AipsError ("TileFileHelper:getHypercube: - not implemented");
  return 0;
}
void TiledFileHelper::readHeader (rownr_t, Bool)
{
  throw AipsError ("TileFileHelper::readHeader - not implemented");
}

} //# NAMESPACE CASACORE - END