//# ViiLayerFactory.h: Recursive factory definition for layered ViImplementation2s
//# Copyright (C) 1996,1997,1998,1999,2000,2001,2002,2003,2016
//# 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
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//#

#include <msvis/MSVis/ViiLayerFactory.h>
#include <msvis/MSVis/ViImplementation2.h>
#include <casacore/casa/Arrays/Vector.h>

#include <casacore/casa/aips.h>

#include <casacore/casa/Arrays/Vector.h>

using namespace casacore;
namespace casa { //# NAMESPACE CASA - BEGIN

namespace vi {


ViImplementation2 * ViiLayerFactory::createViImpl2 (Vector<ViiLayerFactory*> viifactories) const {

  Int nfactory=viifactories.nelements();

  ViImplementation2* vii(nullptr);
  if (nfactory>0)
  {
    if(viifactories(nfactory-1) == nullptr)
        throw(AipsError("ViiLayerFactory in viifactories is null"));
    // Get ViImpl from below if any more to get
    vii= viifactories[nfactory-1]->createViImpl2(viifactories(Slice(0,nfactory-1,1)));
  }
  return createInstance(vii);

}

} // end namespace vi

} //# NAMESPACE CASA - END