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ClpConstraint.hpp
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1 /* $Id: ClpConstraint.hpp 2385 2019-01-06 19:43:06Z unxusr $ */
2 // Copyright (C) 2007, International Business Machines
3 // Corporation and others. All Rights Reserved.
4 // This code is licensed under the terms of the Eclipse Public License (EPL).
5
6 #ifndef ClpConstraint_H
7 #define ClpConstraint_H
8
9 //#############################################################################
10 class ClpSimplex;
11 class ClpModel;
12
18 class ClpConstraint {
19
20 public:
22
23
30 virtual int gradient(const ClpSimplex *model,
31 const double *solution,
32 double *gradient,
33 double &functionValue,
34 double &offset,
35 bool useScaling = false,
36 bool refresh = true) const = 0;
38 virtual double functionValue(const ClpSimplex *model,
39 const double *solution,
40 bool useScaling = false,
41 bool refresh = true) const;
43 virtual void resize(int newNumberColumns) = 0;
45 virtual void deleteSome(int numberToDelete, const int *which) = 0;
47 virtual void reallyScale(const double *columnScale) = 0;
51 virtual int markNonlinear(char *which) const = 0;
55 virtual int markNonzero(char *which) const = 0;
57
59
60 ClpConstraint();
62
64 ClpConstraint(const ClpConstraint &);
65
67 ClpConstraint &operator=(const ClpConstraint &rhs);
68
70 virtual ~ClpConstraint();
71
73 virtual ClpConstraint *clone() const = 0;
74
76
78
79 inline int type()
81 {
82 return type_;
83 }
85 inline int rowNumber() const
86 {
87 return rowNumber_;
88 }
89
91 virtual int numberCoefficients() const = 0;
92
94 inline double functionValue() const
95 {
96 return functionValue_;
97 }
98
100 inline double offset() const
101 {
102 return offset_;
103 }
105 virtual void newXValues() {}
107
108 //---------------------------------------------------------------------------
109
110 protected:
112
113 mutable double *lastGradient_;
116 mutable double functionValue_;
118 mutable double offset_;
120 int type_;
122 int rowNumber_;
124 };
125
126 #endif
127
128 /* vi: softtabstop=2 shiftwidth=2 expandtab tabstop=2
129 */
ClpConstraint::offset
double offset() const
Constraint offset.
Definition: ClpConstraint.hpp:100
ClpConstraint::clone
virtual ClpConstraint * clone() const =0
Clone.
ClpConstraint::rowNumber_
int rowNumber_
Row number (-1 is objective)
Definition: ClpConstraint.hpp:122
ClpModel
Definition: ClpModel.hpp:38
ClpConstraint::operator=
ClpConstraint & operator=(const ClpConstraint &rhs)
Assignment operator.
ClpConstraint
Constraint Abstract Base Class.
Definition: ClpConstraint.hpp:18
ClpConstraint::type
int type()
Returns type, 0 linear, 1 nonlinear.
Definition: ClpConstraint.hpp:80
ClpConstraint::markNonzero
virtual int markNonzero(char *which) const =0
Given a zeroed array sets possible nonzero coefficients to 1.
ClpConstraint::deleteSome
virtual void deleteSome(int numberToDelete, const int *which)=0
Delete columns in constraint.
ClpConstraint::newXValues
virtual void newXValues()
Say we have new primal solution - so may need to recompute.
Definition: ClpConstraint.hpp:105
ClpConstraint::markNonlinear
virtual int markNonlinear(char *which) const =0
Given a zeroed array sets nonlinear columns to 1.
ClpConstraint::functionValue
double functionValue() const
Stored constraint function value.
Definition: ClpConstraint.hpp:94
ClpConstraint::gradient
virtual int gradient(const ClpSimplex *model, const double *solution, double *gradient, double &functionValue, double &offset, bool useScaling=false, bool refresh=true) const =0
Fills gradient.
ClpConstraint::functionValue_
double functionValue_
Value of non-linear part of constraint.
Definition: ClpConstraint.hpp:116
ClpConstraint::ClpConstraint
ClpConstraint()
Default Constructor.
ClpConstraint::~ClpConstraint
virtual ~ClpConstraint()
Destructor.
ClpSimplex
This solves LPs using the simplex method.
Definition: ClpSimplex.hpp:106
ClpConstraint::offset_
double offset_
Value of offset for constraint.
Definition: ClpConstraint.hpp:118
ClpConstraint::type_
int type_
Type of constraint - linear is 1.
Definition: ClpConstraint.hpp:120
ClpConstraint::rowNumber
int rowNumber() const
Row number (-1 is objective)
Definition: ClpConstraint.hpp:85
ClpConstraint::resize
virtual void resize(int newNumberColumns)=0
Resize constraint.
ClpConstraint::numberCoefficients
virtual int numberCoefficients() const =0
Number of possible coefficients in gradient.
ClpConstraint::reallyScale
virtual void reallyScale(const double *columnScale)=0
Scale constraint.
ClpConstraint::lastGradient_
double * lastGradient_
Gradient at last evaluation.
Definition: ClpConstraint.hpp:114