RowBufferedVMatrix.h

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// -*- C++ -*-

// PLearn (A C++ Machine Learning Library)
// Copyright (C) 1998 Pascal Vincent
// Copyright (C) 1999-2002 Pascal Vincent, Yoshua Bengio and University of Montreal
//

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// 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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/* *******************************************************      
   * $Id: RowBufferedVMatrix.h,v 1.11 2004/07/26 20:10:19 tihocan Exp $
   * This file is part of the PLearn library.
   ******************************************************* */


#ifndef RowBufferedRowBufferedVMatrix_INC
#define RowBufferedRowBufferedVMatrix_INC

#include "VMatrix.h"

namespace PLearn {
using namespace std;

class RowBufferedVMatrix: public VMatrix
{

private:

  typedef VMatrix inherited;

protected:

  mutable int current_row_index;
  mutable Vec current_row;
  mutable int other_row_index; 
  mutable Vec other_row;

  virtual void getNewRow(int i, const Vec& v) const = 0;

public:

  RowBufferedVMatrix();
  RowBufferedVMatrix(int the_length, int the_width);

  virtual real get(int i, int j) const; 
  virtual void getRow(int i, Vec v) const;
  virtual void getSubRow(int i, int j, Vec v) const; 

  virtual real dot(int i1, int i2, int inputsize) const;
  virtual real dot(int i, const Vec& v) const;

  virtual void makeDeepCopyFromShallowCopy(map<const void*, void*>& copies);

  PLEARN_DECLARE_ABSTRACT_OBJECT(RowBufferedVMatrix);
};

DECLARE_OBJECT_PTR(RowBufferedVMatrix);

} // end of namespace PLearn
#endif

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