cmtkSource.h

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/*
//
//  Copyright 1997-2009 Torsten Rohlfing
//  Copyright 2004-2009 SRI International
//
//  This file is part of the Computational Morphometry Toolkit.
//
//  http://www.nitrc.org/projects/cmtk/
//
//  The Computational Morphometry Toolkit is free software: you can
//  redistribute it and/or modify it under the terms of the GNU General Public
//  License as published by the Free Software Foundation, either version 3 of
//  the License, or (at your option) any later version.
//
//  The Computational Morphometry Toolkit 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 General Public License for more details.
//
//  You should have received a copy of the GNU General Public License along
//  with the Computational Morphometry Toolkit.  If not, see
//  <http://www.gnu.org/licenses/>.
//
//  $Revision: 2398 $
//
//  $LastChangedDate: 2010-10-05 14:54:37 -0700 (Tue, 05 Oct 2010) $
//
//  $LastChangedBy: torstenrohlfing $
//
*/

#ifndef __cmtkSource_h_included_
#define __cmtkSource_h_included_

#include <cmtkconfig.h>

#include <Pipeline/cmtkPipelineObject.h>

namespace
cmtk
{

template<class O>
class Source : 
  public PipelineObject 
{
protected:
  Source() { Output = NULL; }

  virtual ~Source() 
  { 
    if ( Output ) Output->Unregister( this );
  }
  
public:
  virtual O *GetOutput()
  {
    if ( Output == NULL ) 
      {
      Output = O::New();
      Output->Register( this );
      }
    return Output;
  }
  
protected:
  O *Output;
};


} // namespace cmtk

#endif // #ifndef __cmtkSource_h_included_