VecExtendedVMatrix.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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/* *******************************************************      
   * $Id: VecExtendedVMatrix.h,v 1.6 2004/07/09 19:42:23 tihocan Exp $
   ******************************************************* */


#ifndef VecExtendedVMatrix_INC
#define VecExtendedVMatrix_INC

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

namespace PLearn {
using namespace std;
 

class VecExtendedVMatrix : public RowBufferedVMatrix
{
  typedef RowBufferedVMatrix inherited;

public:
  // ******************
  // *  Constructors  *
  // ******************
  VecExtendedVMatrix(); 

  VecExtendedVMatrix(VMat underlying, Vec extend_data);

  PLEARN_DECLARE_OBJECT(VecExtendedVMatrix);

protected:

  static void declareOptions(OptionList &ol);
  virtual void getNewRow(int i, const Vec& v) const;

public:

  virtual void build();

  virtual void reset_dimensions() {
    underlying_->reset_dimensions();
    width_ = underlying_.width() + extend_data_.length();
    length_ = underlying_.length();
  }

protected:
  VMat underlying_;
  Vec extend_data_;
private:
  void build_();
};

DECLARE_OBJECT_PTR(VecExtendedVMatrix);

} // end of namespcae PLearn
#endif

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