org.gnu.glpk

Class GlpkCallback

java.lang.Object

org.gnu.glpk.GlpkCallback

public final class GlpkCallback
extends Object

This class manages callbacks from the MIP solver.

The GLPK MIP solver calls method callback in the branch-and-cut algorithm. A listener to the callback can be used to influence the sequence in which nodes of the search tree are evaluated, or to supply a heuristic solution. To find out why the callback is issued use method GLPK.glp_ios_reason.

The list of listeners is thread local. Each thread has to register its own listener.

Method Summary

Modifier and Type	Method and Description
static void	addListener(GlpkCallbackListener listener) Adds a listener for callbacks.
static void	callback(long cPtr) Callback method called by native library.
static boolean	removeListener(GlpkCallbackListener listener) Removes first occurance of a listener for callbacks.

Methods inherited from class java.lang.Object

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

Method Detail

callback

public static void callback(long cPtr)

Callback method called by native library.

Parameters:

cPtr - pointer to search tree

addListener

public static void addListener(GlpkCallbackListener listener)

Adds a listener for callbacks.

Parameters:

listener - listener for callbacks

removeListener

public static boolean removeListener(GlpkCallbackListener listener)

Removes first occurance of a listener for callbacks.

Parameters:

listener - listener for callbacks

Returns:

true if the listener was found