IloCplex.BranchDirection

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ilog.cplex
Class IloCplex.BranchDirection

java.lang.Object
  |
  +--ilog.cplex.IloCplex.BranchDirection

Enclosing class:: IloCplex

public abstract static class IloCplex.BranchDirection
extends java.lang.Object

Enumeration of branch direction values.

Branch directions can be used with the methods IloCplex.setDirection and IloCplex.setDirections to select the child node to evaluate first after branching on a specific variable. There are three settings:

Up: process the child where the lower bound of the variable has been tightened first.
Down: process the child where the upper bound of the variable has been tightened first.
Global: process the child first that the MIP optimizer would have ordinarily chosen.

See Also:: IloCplex.setDirection(ilog.concert.IloNumVar, ilog.cplex.IloCplex.BranchDirection), IloCplex.setDirections(ilog.concert.IloNumVar[], ilog.cplex.IloCplex.BranchDirection[])

Field Summary

static IloCplex.BranchDirection Down
          Downwards branch direction.

static IloCplex.BranchDirection Global
          Global branch direction.

static IloCplex.BranchDirection Up
          Upwards branch direction.

Constructor Summary

IloCplex.BranchDirection()


Methods inherited from class java.lang.Object

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

Field Detail

Up

public static final IloCplex.BranchDirection Up

Upwards branch direction. Setting this branch direction for a variable instructs IloCplex to first process the node where the lower bound has been tightened after branching on that variable.

Down

public static final IloCplex.BranchDirection Down

Downwards branch direction. Setting this branch direction for a variable instructs IloCplex to first process the node where the upper bound has been tightened after branching on that variable.

Global

public static final IloCplex.BranchDirection Global

Global branch direction. Setting this branch direction for a variable instructs IloCplex to first process the node according to the globally selected or default branch direction.

Constructor Detail