ifs.dbt
Class DbtVariableSelection

java.lang.Object
  ifs.dbt.DbtVariableSelection

All Implemented Interfaces:

VariableSelection

public class DbtVariableSelection
extends Object
implements VariableSelection

Selection of a variable for dynamic backtracking.

Returns null if all variables are assigned.

Checks if there is a varaible with all values marked as nogood (and pick it if there is any).

Returns the first unassigned variable.

This IFS solver variable selection heuristics is to be used only in case of dynamic backtracking and it has no parameters.

Version:

1.0

Author:

Tomáš Müller

Constructor Summary

DbtVariableSelection(DataProperties properties)

Method Summary

void	init(Solver solver) Heuristics initialization
Variable	selectVariable(Solution solution) Variable selection

Methods inherited from class java.lang.Object

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

Constructor Detail

DbtVariableSelection

public DbtVariableSelection(DataProperties properties)

Method Detail

init

public void init(Solver solver)

Heuristics initialization

Specified by:

init in interface VariableSelection

See Also:

VariableSelection.init(Solver)

selectVariable

public Variable selectVariable(Solution solution)

Variable selection

Specified by:

selectVariable in interface VariableSelection

Parameters:

solution - current solution

See Also:

VariableSelection.selectVariable(Solution)