This class allows for the use of more exotic solvers e.g. More...
#include <OsiAuxInfo.hpp>
Public Member Functions | |
OsiBabSolver (int solverType=0) | |
OsiBabSolver (const OsiBabSolver &rhs) | |
virtual | ~OsiBabSolver () |
virtual OsiAuxInfo * | clone () const |
Clone. | |
OsiBabSolver & | operator= (const OsiBabSolver &rhs) |
Assignment operator. | |
void | setSolver (const OsiSolverInterface *solver) |
Update solver. | |
void | setSolver (const OsiSolverInterface &solver) |
Update solver. | |
int | solution (double &objectiveValue, double *newSolution, int numberColumns) |
returns 0 if no heuristic solution, 1 if valid solution with better objective value than one passed in Sets solution values if good, sets objective value numberColumns is size of newSolution | |
void | setSolution (const double *solution, int numberColumns, double objectiveValue) |
Set solution and objective value. | |
bool | hasSolution (double &solutionValue, double *solution) |
returns true if the object stores a solution, false otherwise. | |
void | setSolverType (int value) |
Sets solver type 0 - normal LP solver 1 - DW - may also return heuristic solutions 2 - NLP solver or similar - can't compute objective value just from solution check solver to see if feasible and what objective value is
| |
int | solverType () const |
gets solver type 0 - normal LP solver 1 - DW - may also return heuristic solutions 2 - NLP solver or similar - can't compute objective value just from solution check this (rather than solver) to see if feasible and what objective value is
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bool | solutionAddsCuts () const |
Return true if getting solution may add cuts so hot start etc will be obsolete. | |
bool | alwaysTryCutsAtRootNode () const |
Return true if we should try cuts at root even if looks satisfied. | |
bool | solverAccurate () const |
Returns true if can use solver objective or feasible values, otherwise use mipBound etc. | |
bool | reducedCostsAccurate () const |
Returns true if can use reduced costs for fixing. | |
double | mipBound () const |
Get objective (well mip bound). | |
bool | mipFeasible () const |
Returns true if node feasible. | |
void | setMipBound (double value) |
Set mip bound (only used for some solvers). | |
double | bestObjectiveValue () const |
Get objective value of saved solution. | |
bool | tryCuts () const |
Says whether we want to try cuts at all. | |
bool | warmStart () const |
Says whether we have a warm start (so can do strong branching). | |
int | extraCharacteristics () const |
Get bit mask for odd actions of solvers 1 - solution or bound arrays may move in mysterious ways e.g. | |
void | setExtraCharacteristics (int value) |
Set bit mask for odd actions of solvers 1 - solution or bound arrays may move in mysterious ways e.g. | |
const double * | beforeLower () const |
Pointer to lower bounds before branch (only if extraCharacteristics set). | |
void | setBeforeLower (const double *array) |
Set pointer to lower bounds before branch (only if extraCharacteristics set). | |
const double * | beforeUpper () const |
Pointer to upper bounds before branch (only if extraCharacteristics set). | |
void | setBeforeUpper (const double *array) |
Set pointer to upper bounds before branch (only if extraCharacteristics set). | |
Protected Attributes | |
double | bestObjectiveValue_ |
Objective value of best solution (if there is one) (minimization). | |
double | mipBound_ |
Current lower bound on solution ( if > 1.0e50 infeasible). | |
const OsiSolverInterface * | solver_ |
Solver to use for getting/setting solutions etc. | |
double * | bestSolution_ |
Best integer feasible solution. | |
const double * | beforeLower_ |
Pointer to lower bounds before branch (only if extraCharacteristics set). | |
const double * | beforeUpper_ |
Pointer to upper bounds before branch (only if extraCharacteristics set). | |
int | solverType_ |
Solver type 0 - normal LP solver 1 - DW - may also return heuristic solutions 2 - NLP solver or similar - can't compute objective value just from solution check this (rather than solver) to see if feasible and what objective value is
| |
int | sizeSolution_ |
Size of solution. | |
int | extraCharacteristics_ |
Bit mask for odd actions of solvers 1 - solution or bound arrays may move in mysterious ways e.g. |
This class allows for the use of more exotic solvers e.g.
Non-Linear or Volume.
You can derive from this although at present I can't see the need.
Definition at line 47 of file OsiAuxInfo.hpp.
OsiBabSolver::OsiBabSolver | ( | int | solverType = 0 |
) |
OsiBabSolver::OsiBabSolver | ( | const OsiBabSolver & | rhs | ) |
virtual OsiBabSolver::~OsiBabSolver | ( | ) | [virtual] |
virtual OsiAuxInfo* OsiBabSolver::clone | ( | ) | const [virtual] |
Clone.
Reimplemented from OsiAuxInfo.
OsiBabSolver& OsiBabSolver::operator= | ( | const OsiBabSolver & | rhs | ) |
Assignment operator.
Reimplemented from OsiAuxInfo.
void OsiBabSolver::setSolver | ( | const OsiSolverInterface * | solver | ) | [inline] |
Update solver.
Definition at line 63 of file OsiAuxInfo.hpp.
void OsiBabSolver::setSolver | ( | const OsiSolverInterface & | solver | ) | [inline] |
Update solver.
Definition at line 66 of file OsiAuxInfo.hpp.
int OsiBabSolver::solution | ( | double & | objectiveValue, | |
double * | newSolution, | |||
int | numberColumns | |||
) |
returns 0 if no heuristic solution, 1 if valid solution with better objective value than one passed in Sets solution values if good, sets objective value numberColumns is size of newSolution
void OsiBabSolver::setSolution | ( | const double * | solution, | |
int | numberColumns, | |||
double | objectiveValue | |||
) |
Set solution and objective value.
Number of columns and optimization direction taken from current solver. Size of solution is numberColumns (may be padded or truncated in function)
bool OsiBabSolver::hasSolution | ( | double & | solutionValue, | |
double * | solution | |||
) |
returns true if the object stores a solution, false otherwise.
If there is a solution then solutionValue and solution will be filled out as well. In that case the user needs to allocate solution to be a big enough array.
void OsiBabSolver::setSolverType | ( | int | value | ) | [inline] |
Sets solver type 0 - normal LP solver 1 - DW - may also return heuristic solutions 2 - NLP solver or similar - can't compute objective value just from solution check solver to see if feasible and what objective value is
Using Outer Approximation so called lp based
Definition at line 100 of file OsiAuxInfo.hpp.
int OsiBabSolver::solverType | ( | ) | const [inline] |
gets solver type 0 - normal LP solver 1 - DW - may also return heuristic solutions 2 - NLP solver or similar - can't compute objective value just from solution check this (rather than solver) to see if feasible and what objective value is
Using Outer Approximation so called lp based
Definition at line 114 of file OsiAuxInfo.hpp.
bool OsiBabSolver::solutionAddsCuts | ( | ) | const [inline] |
Return true if getting solution may add cuts so hot start etc will be obsolete.
Definition at line 118 of file OsiAuxInfo.hpp.
bool OsiBabSolver::alwaysTryCutsAtRootNode | ( | ) | const [inline] |
Return true if we should try cuts at root even if looks satisfied.
Definition at line 121 of file OsiAuxInfo.hpp.
bool OsiBabSolver::solverAccurate | ( | ) | const [inline] |
Returns true if can use solver objective or feasible values, otherwise use mipBound etc.
Definition at line 125 of file OsiAuxInfo.hpp.
bool OsiBabSolver::reducedCostsAccurate | ( | ) | const [inline] |
Returns true if can use reduced costs for fixing.
Definition at line 128 of file OsiAuxInfo.hpp.
double OsiBabSolver::mipBound | ( | ) | const |
Get objective (well mip bound).
bool OsiBabSolver::mipFeasible | ( | ) | const |
Returns true if node feasible.
void OsiBabSolver::setMipBound | ( | double | value | ) | [inline] |
Set mip bound (only used for some solvers).
Definition at line 135 of file OsiAuxInfo.hpp.
double OsiBabSolver::bestObjectiveValue | ( | ) | const [inline] |
Get objective value of saved solution.
Definition at line 138 of file OsiAuxInfo.hpp.
bool OsiBabSolver::tryCuts | ( | ) | const [inline] |
Says whether we want to try cuts at all.
Definition at line 141 of file OsiAuxInfo.hpp.
bool OsiBabSolver::warmStart | ( | ) | const [inline] |
Says whether we have a warm start (so can do strong branching).
Definition at line 144 of file OsiAuxInfo.hpp.
int OsiBabSolver::extraCharacteristics | ( | ) | const [inline] |
Get bit mask for odd actions of solvers 1 - solution or bound arrays may move in mysterious ways e.g.
cplex 2 - solver may want bounds before branch
Definition at line 150 of file OsiAuxInfo.hpp.
void OsiBabSolver::setExtraCharacteristics | ( | int | value | ) | [inline] |
Set bit mask for odd actions of solvers 1 - solution or bound arrays may move in mysterious ways e.g.
cplex 2 - solver may want bounds before branch
Definition at line 156 of file OsiAuxInfo.hpp.
const double* OsiBabSolver::beforeLower | ( | ) | const [inline] |
Pointer to lower bounds before branch (only if extraCharacteristics set).
Definition at line 159 of file OsiAuxInfo.hpp.
void OsiBabSolver::setBeforeLower | ( | const double * | array | ) | [inline] |
Set pointer to lower bounds before branch (only if extraCharacteristics set).
Definition at line 162 of file OsiAuxInfo.hpp.
const double* OsiBabSolver::beforeUpper | ( | ) | const [inline] |
Pointer to upper bounds before branch (only if extraCharacteristics set).
Definition at line 165 of file OsiAuxInfo.hpp.
void OsiBabSolver::setBeforeUpper | ( | const double * | array | ) | [inline] |
Set pointer to upper bounds before branch (only if extraCharacteristics set).
Definition at line 168 of file OsiAuxInfo.hpp.
double OsiBabSolver::bestObjectiveValue_ [protected] |
Objective value of best solution (if there is one) (minimization).
Definition at line 172 of file OsiAuxInfo.hpp.
double OsiBabSolver::mipBound_ [protected] |
Current lower bound on solution ( if > 1.0e50 infeasible).
Definition at line 174 of file OsiAuxInfo.hpp.
const OsiSolverInterface* OsiBabSolver::solver_ [protected] |
Solver to use for getting/setting solutions etc.
Definition at line 176 of file OsiAuxInfo.hpp.
double* OsiBabSolver::bestSolution_ [protected] |
Best integer feasible solution.
Definition at line 178 of file OsiAuxInfo.hpp.
const double* OsiBabSolver::beforeLower_ [protected] |
Pointer to lower bounds before branch (only if extraCharacteristics set).
Definition at line 180 of file OsiAuxInfo.hpp.
const double* OsiBabSolver::beforeUpper_ [protected] |
Pointer to upper bounds before branch (only if extraCharacteristics set).
Definition at line 182 of file OsiAuxInfo.hpp.
int OsiBabSolver::solverType_ [protected] |
Solver type 0 - normal LP solver 1 - DW - may also return heuristic solutions 2 - NLP solver or similar - can't compute objective value just from solution check this (rather than solver) to see if feasible and what objective value is
Using Outer Approximation so called lp based
Definition at line 194 of file OsiAuxInfo.hpp.
int OsiBabSolver::sizeSolution_ [protected] |
Size of solution.
Definition at line 196 of file OsiAuxInfo.hpp.
int OsiBabSolver::extraCharacteristics_ [protected] |
Bit mask for odd actions of solvers 1 - solution or bound arrays may move in mysterious ways e.g.
cplex 2 - solver may want bounds before branch
Definition at line 201 of file OsiAuxInfo.hpp.