SelectRowsFileIndexVMatrix.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
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
// NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// 
// This file is part of the PLearn library. For more information on the PLearn
// library, go to the PLearn Web site at www.plearn.org


/* *******************************************************      
   * $Id: SelectRowsFileIndexVMatrix.h,v 1.6 2004/04/05 23:03:57 morinf Exp $
   ******************************************************* */


#ifndef SelectRowsFileIndexVMatrix_INC
#define SelectRowsFileIndexVMatrix_INC

#include "VMat.h"

namespace PLearn {
using namespace std;
 

class SelectRowsFileIndexVMatrix: public VMatrix
{
  typedef VMatrix inherited;

protected:
  VMat distr;
  IntVecFile indices;
  string index_file;
public:
  // ******************
  // *  Constructors  *
  // ******************
  SelectRowsFileIndexVMatrix(); 

  SelectRowsFileIndexVMatrix(VMat the_distr, const string& indexfile);

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

  virtual void build();

  virtual real get(int i, int j) const;
  virtual void getSubRow(int i, int j, Vec v) const;
  virtual void getRow(int i, Vec v) const;
  virtual real getStringVal(int col, const string & str) const;
  virtual string getValString(int col, real val) const;
  virtual string getString(int row,int col) const;
  virtual const map<string,real>& getStringToRealMapping(int col) const;

  virtual real dot(int i1, int i2, int inputsize) const;
  virtual real dot(int i, const Vec& v) const;
  virtual void reset_dimensions() { distr->reset_dimensions(); width_=distr->width(); }
private:
    void build_();
};

DECLARE_OBJECT_PTR(SelectRowsFileIndexVMatrix);

} // end of namespcae PLearn
#endif

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