NaryVariable.cc

Go to the documentation of this file.

// -*- C++ -*-

// PLearn (A C++ Machine Learning Library)
// Copyright (C) 1998 Pascal Vincent
// Copyright (C) 1999-2002 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
// Copyright (C) 2001-2002 Nicolas Chapados, Ichiro Takeuchi, Jean-Sebastien Senecal
// Copyright (C) 2002 Xiangdong Wang, Christian Dorion

// 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
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 
// 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: NaryVariable.cc,v 1.9 2004/04/27 16:06:12 morinf Exp $
   * This file is part of the PLearn library.
   ******************************************************* */

#include "NaryVariable.h"

namespace PLearn {
using namespace std;

PLEARN_IMPLEMENT_ABSTRACT_OBJECT(NaryVariable, "ONE LINE DESCR", "NO HELP");

NaryVariable::NaryVariable(const VarArray& the_varray, int thelength, int thewidth)
  :Variable(thelength,thewidth), varray(the_varray) {}



void NaryVariable::declareOptions(OptionList& ol)
{
  declareOption(ol, "varray", &NaryVariable::varray, OptionBase::buildoption, 
                "The array of parent variables that this one depends on\n");

  inherited::declareOptions(ol);
}


void NaryVariable::makeDeepCopyFromShallowCopy(map<const void*, void*>& copies)
{
  Variable::makeDeepCopyFromShallowCopy(copies);
  deepCopyField(varray, copies);
  //for(int i=0; i<varray.size(); i++)
  //  deepCopyField(varray[i], copies);
}








bool NaryVariable::markPath()
{
  if(!marked)
    {
      for(int i=0; i<varray.size(); i++)
        if (!varray[i].isNull())
          marked |= varray[i]->markPath();
    }
  return marked;
}


void NaryVariable::buildPath(VarArray& proppath)
{
  if(marked)
    {
      for(int i=0; i<varray.size(); i++)
        if (!varray[i].isNull())
          varray[i]->buildPath(proppath);
      proppath &= Var(this);
      clearMark();
    }
}


VarArray NaryVariable::sources()
{
  VarArray a(0,0);
  if (!marked)
    {
      marked = true;
      for(int i=0; i<varray.size(); i++)
        if (!varray[i].isNull())
          a &= varray[i]->sources();
      if (a.size()==0)
        a &= Var(this);
    }
  return a;
}


VarArray NaryVariable::random_sources()
{
  VarArray a(0,0);
  if (!marked)
    {
      marked = true;
      for(int i=0; i<varray.size(); i++)
        if (!varray[i].isNull())
          a &= varray[i]->random_sources();
    }
  return a;
}


VarArray NaryVariable::ancestors() 
{ 
  VarArray a(0,0);
  if (marked)
    return a;
  marked = true;
  for(int i=0; i<varray.size(); i++)
    if (!varray[i].isNull())
      a &= varray[i]->ancestors();
  a &= Var(this);
  return a;
}


void NaryVariable::unmarkAncestors()
{
  if (marked)
    {
      marked = false;
      for(int i=0; i<varray.size(); i++)
        if (!varray[i].isNull())
          varray[i]->unmarkAncestors();
    }
}


VarArray NaryVariable::parents()
{
  VarArray unmarked_parents;
  for(int i=0; i<varray.size(); i++)
    if (!varray[i].isNull() && !varray[i]->marked)
      unmarked_parents.append(varray[i]);
  return unmarked_parents;
}


void NaryVariable::resizeRValue()
{
  inherited::resizeRValue();
  for (int i=0; i<varray.size(); i++)
    if (!varray[i]->rvaluedata) varray[i]->resizeRValue();
}



} // end of namespace PLearn

---