ExtendedVMatrix.h

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// -*- C++ -*-

// PLearn (A C++ Machine Learning Library)
// Copyright (C) 1998 Pascal Vincent
// Copyright (C) 1999-2001 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
// Copyright (C) 2002 Pascal Vincent, Julien Keable, Xavier Saint-Mleux
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 
//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
// 
//  2. Redistributions in binary form must reproduce the above copyright
//     notice, this list of conditions and the following disclaimer in the
//     documentation and/or other materials provided with the distribution.
// 
//  3. The name of the authors may not be used to endorse or promote
//     products derived from this software without specific prior written
//     permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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// This file is part of the PLearn library. For more information on the PLearn
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/* *******************************************************      
   * $Id: ExtendedVMatrix.h,v 1.6 2004/07/07 17:30:48 tihocan Exp $
   ******************************************************* */


#ifndef ExtendedVMatrix_INC
#define ExtendedVMatrix_INC

#include "RowBufferedVMatrix.h"
#include "VMat.h"

namespace PLearn {
using namespace std;
 

class ExtendedVMatrix: public RowBufferedVMatrix
{
  typedef RowBufferedVMatrix inherited;

public:
  VMat distr;
  int top_extent;
  int bottom_extent;
  int left_extent;
  int right_extent;
  real fill_value; 

  // ******************
  // *  Constructors  *
  // ******************
  ExtendedVMatrix(); 

  ExtendedVMatrix(VMat the_distr, 
                  int the_top_extent, int the_bottom_extent, 
                  int the_left_extent, int the_right_extent, 
                  real the_fill_value);

  PLEARN_DECLARE_OBJECT(ExtendedVMatrix);
  static void declareOptions(OptionList &ol);

  virtual void build();

  virtual void reset_dimensions() 
    { 
      distr->reset_dimensions(); 
      width_=distr->width()+left_extent+right_extent; 
      length_=distr->length()+top_extent+bottom_extent;
    }

protected:

  virtual void getNewRow(int i, const Vec& v) const;

private:
  void build_();
};

DECLARE_OBJECT_PTR(ExtendedVMatrix);

} // end of namespcae PLearn
#endif

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