/* $Id: ClpConstraint.cpp 1665 2011-01-04 17:55:54Z lou $ */
// Copyright (C) 2007, International Business Machines
// Corporation and others.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).

#include "CoinPragma.hpp"
#include "ClpSimplex.hpp"
#include "ClpConstraint.hpp"

//#############################################################################
// Constructors / Destructor / Assignment
//#############################################################################

//-------------------------------------------------------------------
// Default Constructor
//-------------------------------------------------------------------
ClpConstraint::ClpConstraint () :
     lastGradient_(NULL),
     functionValue_(0.0),
     offset_(0.0),
     type_(-1),
     rowNumber_(-1)
{

}

//-------------------------------------------------------------------
// Copy constructor
//-------------------------------------------------------------------
ClpConstraint::ClpConstraint (const ClpConstraint & source) :
     lastGradient_(NULL),
     functionValue_(source.functionValue_),
     offset_(source.offset_),
     type_(source.type_),
     rowNumber_(source.rowNumber_)
{

}

//-------------------------------------------------------------------
// Destructor
//-------------------------------------------------------------------
ClpConstraint::~ClpConstraint ()
{
     delete [] lastGradient_;

}

//----------------------------------------------------------------
// Assignment operator
//-------------------------------------------------------------------
ClpConstraint &
ClpConstraint::operator=(const ClpConstraint& rhs)
{
     if (this != &rhs) {
          functionValue_ = rhs.functionValue_;
          offset_ = rhs.offset_;
          type_ = rhs.type_;
          rowNumber_ = rhs.rowNumber_;
          delete [] lastGradient_;
          lastGradient_ = NULL;
     }
     return *this;
}
// Constraint function value
double
ClpConstraint::functionValue (const ClpSimplex * model,
                              const double * solution,
                              bool useScaling,
                              bool refresh) const
{
     double offset;
     double value;
     int n = model->numberColumns();
     double * grad = new double [n];
     gradient(model, solution, grad, value, offset, useScaling, refresh);
     delete [] grad;
     return value;
}