org.cpsolver.studentsct.heuristics

Class RouletteWheelRequestSelection

java.lang.Object

org.cpsolver.studentsct.heuristics.RouletteWheelRequestSelection

All Implemented Interfaces:

VariableSelection<Request,Enrollment>

public class RouletteWheelRequestSelection
extends Object
implements VariableSelection<Request,Enrollment>

Variable (Request) selection using RouletteWheelSelection. Unassigned request has 10 points, an assigned request has 1 point for each section that exceeds its bound.

Version:

StudentSct 1.3 (Student Sectioning)
Copyright (C) 2007 - 2014 Tomáš Müller
muller@unitime.org
http://muller.unitime.org

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not see http://www.gnu.org/licenses/.

Author:

Tomáš Müller

Constructor Summary

Constructors

Constructor and Description
RouletteWheelRequestSelection(DataProperties properties) Constructor

Method Summary

Modifier and Type	Method and Description
protected RouletteWheelSelection<Request>	getRoulette(Solution<Request,Enrollment> solution) Populate roulette wheel selection, if null or empty.
void	init(Solver<Request,Enrollment> solver) Initialization
Request	selectVariable(Solution<Request,Enrollment> solution) Variable selection.

Methods inherited from class java.lang.Object

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

Constructor Detail

RouletteWheelRequestSelection

public RouletteWheelRequestSelection(DataProperties properties)

Constructor

Parameters:

properties - configuration

Method Detail

init

public void init(Solver<Request,Enrollment> solver)

Initialization

Specified by:

init in interface VariableSelection<Request,Enrollment>

Parameters:

solver - current solver

getRoulette

protected RouletteWheelSelection<Request> getRoulette(Solution<Request,Enrollment> solution)

Populate roulette wheel selection, if null or empty.

Parameters:

solution - current solution

Returns:

selection

selectVariable

public Request selectVariable(Solution<Request,Enrollment> solution)

Variable selection. RouletteWheelSelection is used. Unassigned request has 10 points, an assigned request has 1 point for each section that exceeds its bound.

Specified by:

selectVariable in interface VariableSelection<Request,Enrollment>

Parameters:

solution - current solution

Returns:

selected variable