Class IntegerSolver.ModelIntegration

java.lang.Object

org.ojalgo.optimisation.ExpressionsBasedModel.Integration<IntegerSolver>

org.ojalgo.optimisation.integer.IntegerSolver.ModelIntegration

All Implemented Interfaces:

Optimisation, Optimisation.Integration<ExpressionsBasedModel, IntegerSolver>

Enclosing class:

IntegerSolver

public static final class IntegerSolver.ModelIntegration
extends ExpressionsBasedModel.Integration<IntegerSolver>

Nested Class Summary

Nested classes/interfaces inherited from interface Optimisation

Optimisation.Constraint, Optimisation.ConstraintType, Optimisation.Environment, Optimisation.Integration<M,S>, Optimisation.Model, Optimisation.Objective, Optimisation.Options, Optimisation.ProblemStructure, Optimisation.Result, Optimisation.Sense, Optimisation.Solver, Optimisation.State

Field Summary

Fields inherited from interface Optimisation

ENVIRONMENT

Constructor Summary

Constructors

Constructor	Description
ModelIntegration()

Method Summary

Modifier and Type	Method	Description
IntegerSolver	build(ExpressionsBasedModel model)	An integration must be able to instantiate a solver that can handle (any) model instance.
protected Optimisation.Sense	getSolverSense()	Some solvers are hard-wired to solve either min or max problems.
boolean	isCapable(ExpressionsBasedModel model)

Methods inherited from class ExpressionsBasedModel.Integration

computeReducedCostFromMultipliers, expandFreeToFull, expandFreeToFull, expandFreeToFull, extractSolverState, getIndexInSolver, getIndexOfFreeInSolver, getObjectiveAdjustment, isSwitch, prepareSolverCandidate, reduceFullToFree, setSwitch, toModelState, toSolverState, withCapabilityPredicate, withOptionsModifier

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ModelIntegration

public ModelIntegration()

Method Details

build

public IntegerSolver build(ExpressionsBasedModel model)

Description copied from interface: Optimisation.Integration

An integration must be able to instantiate a solver that can handle (any) model instance.

isCapable

public boolean isCapable(ExpressionsBasedModel model)

Returns:

true if this solver (integration) can handle the input model

getSolverSense

protected Optimisation.Sense getSolverSense()

Description copied from class: ExpressionsBasedModel.Integration

Some solvers are hard-wired to solve either min or max problems. (Typically ojAlgo's built-in solvers are implemented that way.) If that's the case this method should indicate what the convention is. Returning null indicates there is no convention/hard-wire, and the solver will either min or max depending what's specified.

When the solver's sense is hard-wired some things, like the sign of the optimal value or the reduced costs, may have to be adjusted.

Since this was a late addition to this class a default implementation was needed, and null is commonly the correct return value for 3:d party solvers.

Overrides:

getSolverSense in class ExpressionsBasedModel.Integration<IntegerSolver>