PassThroughTVI.h

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/* -*- mode: c++ -*- */
//# PassThroughTVI
//# Copyright (C) 2017
//# 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
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//#

#ifndef PASSTHROUGHTVI_H_
#define PASSTHROUGHTVI_H_

#include <msvis/MSVis/TransformingVi2.h>
#include <msvis/MSVis/ViiLayerFactory.h>

namespace casa { //# NAMESPACE CASA - BEGIN

namespace vi { //# NAMESPACE VI - BEGIN

/* 
 * This class is the simplest TVI possible that passes all the requests to the
 * underlying VI (delegating to TransformingVi2). It can be used for
 * testing purposes.
 */
class PassThroughTVI : public TransformingVi2
{
public:
  
  //Constructor
  PassThroughTVI(ViImplementation2 * inputVii);

  void origin();

  void next();

};

/*
 * Factory that allows the creation of DataSwappingTVI classes.
 * This factory doesn't have any parameter to configure
 */
class PassThroughTVILayerFactory : public ViiLayerFactory
{

public:

  PassThroughTVILayerFactory();

  virtual ~PassThroughTVILayerFactory();

protected:

  virtual ViImplementation2 * createInstance(ViImplementation2* vii0) const;
};


} // end namespace vi

} // end namespace casa

#endif /* PASSTHROUGHTVI_H_ */