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This is an advanced class. Advanced classes typically demand a profound understanding of the algorithms used by ILOG CPLEX. Thus they incur a higher risk of incorrect behavior in your application, behavior that can be difficult to debug. Therefore, ILOG encourages you to consider carefully whether you can accomplish the same task by means of other classes instead.
This callback is called whenever a new potential incumbent is found during branch & cut searches. It allows you to analyze the proposed incumbent and optionally reject it. In this case, CPLEX will continue the branch & cut search. This callback is thus typically combined with a branch callback that instructs CPLEX how to branch on a node after it has found a potential incumbent and thus considered the node solution to be integer feasible.
See Also:
IloCplex, IloCplex::Callback, IloCplex::CallbackI, IloCplex::MIPCallbackI, IloCplex::OptimizationCallbackI, ILOINCUMBENTCALLBACK0
| Method Summary | |
|---|---|
protected NodeData * | getNodeData() const |
protected NodeId | getNodeId() const |
protected IloNum | getObjValue() const |
protected IloNum | getSlack(const IloRange rng) const |
protected void | getSlacks(IloNumArray val, const IloRangeArray con) const |
protected IloNum | getValue(const IloIntVar var) const |
protected IloNum | getValue(const IloNumVar var) const |
protected IloNum | getValue(const IloExprArg expr) const |
protected void | getValues(IloNumArray val, const IloIntVarArray vars) const |
protected void | getValues(IloNumArray val, const IloNumVarArray vars) const |
protected void | reject() |
Inherited Methods from MIPCallbackI |
|---|
getNcliques, getNcovers, getNdisjunctiveCuts, getNflowCovers, getNflowPaths, getNfractionalCuts, getNGUBcovers, getNimpliedBounds, getNMIRs, getObjCoef, getObjCoef, getObjCoefs, getObjCoefs, getUserThreads |
Inherited Methods from OptimizationCallbackI |
|---|
getModel, getNcols, getNQCs, getNrows |
Inherited Methods from CallbackI |
|---|
abort, duplicateCallback, getEnv, main |
| Method Detail |
|---|
This method retrieves the NodeData object that may have
previously been assigned to the current node by the user with method
IloCplex::BranchCallbackI::makeBranch. If no data object has
been assigned to the current node, 0 will be returned.
This method returns the NodeId of the current
node.
This method returns the query objective value of the potential incumbent.
If you need the object representing the objective itself,
consider the method
IloCplex::getObjective instead.
This method returns the slack value for the range specified by
rng for the potential incumbent.
This method puts the slack value for each range in the array of
ranges con into the corresponding element of the array
val for the potential incumbent. For this CPLEX resizes
array val to match the size of array con.
This method returns the query value of the variable
var in the potential incumbent solution.
This method returns the value of the variable
var in the potential incumbent solution.
This method returns the value of the expr for
the potential incumbent solution.
This method returns the query values of the variables in the array
vars in the potential incumbent solution and copies them to
val. CPLEX automatically resizes the array
val to match the size of the array vars.
This method returns the query values of the variables in the array
vars in the potential incumbent solution and copies them to
val. CPLEX automatically resizes the array
val to match the length of the array vars.
This method rejects the proposed incumbent.