ILOG CPLEX C++ API 9.0 Reference Manual

IloCplex::NodeCallbackI
NodeId for each of the remaining nodes (0 to n-1). Such a query allows you to
associate data with individual nodes.
The methods of this class are protected for use in deriving a user-written callback class
and in implementing the main method there.
If an attempt is made to access information not available to an instance of this class, an
exception is thrown.
See Also
Constructors
Methods
IloCplex, IloCplex::Callback, IloCplex::CallbackI,
IloCplex::MIPCallbackI, ILONODECALLBACK0
protected NodeCallbackI()
This constructor creates a callback for use in an application with user-defined node
selection inquiry during branch & cut searches.
protected IloNumVar getBranchVar(NodeId nodeid)
This method returns the variable that was branched on last when CPLEX created the
node with the identifier nodeid. If that node has been created by branching on a
constraint or on multiple variables, 0 (zero) will be returned.
protected IloNumVar getBranchVar(int node)
Returns the variable that was branched on last when creating the node indicated by the
index number node. If that node has been created by branching on a constraint or on
multiple variables, 0 (zero) will be returned.
protected IloInt getDepth(NodeId nodeid)
This method returns the depth of the node in the search tree for the node with the
identifier nodeid. The root node has depth 0 (zero). The depth of other nodes is
defined recursively as the depth of their parent node plus one. In other words, the depth
of a node is its distance in terms of the number of branches from the root.
protected IloInt getDepth(int node)
This method returns the depth of the node in the search tree. The root node has depth 0
(zero). The depth of other nodes is defined recursively as the depth of their parent node
plus one. In other words, the depth of a node is its distance in terms of the number of
branches from the root.
protected IloNum getEstimatedObjValue(NodeId nodeid)
This method returns the estimated objective value of the node with the identifier node.
protected IloNum getEstimatedObjValue(int node)
This method returns the estimated objective value of the node indicated by the index
number node.
ILOG CPLEX C++ API 9.0 REFERENCE M ANUAL 189