casa6

// -*- C++ -*-

//# ConvFuncDiskCache.cc: Implementation of the ConvFuncDiskCache class

//# Copyright (C) 1997,1998,1999,2000,2001,2002,2003

//# 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 <synthesis/MeasurementComponents/ConvFuncDiskCache.h>

#include <synthesis/TransformMachines/Utils.h>

#include <casa/Exceptions/Error.h>

#include <lattices/LEL/LatticeExpr.h>

#include <synthesis/TransformMachines/SynthesisError.h>

#include <synthesis/TransformMachines/Utils.h>

#include <casa/OS/Directory.h>

#include <fstream>

​

using namespace casacore;

namespace casa{

  //

  //-------------------------------------------------------------------------

  // Just load the axillary info. if found.  The actual functions are loaded

  // as and when required using loadConvFunction() method.

  //

  void ConvFuncDiskCache::initCache()

  {

    ostringstream name;

    String line;

    Directory dirObj(Dir);

​

    if (Dir.length() == 0) 

      throw(SynthesisFTMachineError("Got null string for disk cache dir. "

                    "in ConvFuncDiskCache::initCache()"));

    //

    // If the directory does not exist, create it

    //

    if (!dirObj.exists()) dirObj.create();

    else if ((!dirObj.isWritable()) || (!dirObj.isReadable()))

      {

    throw(SynthesisFTMachineError(String("Directory \"")+Dir+String("\"")+

                      String(" for convolution function cache"

                         " exists but is unreadable/unwriteable")));

      }

​