org.cpsolver.exam.neighbours

Class ExamRoomMove

java.lang.Object

org.cpsolver.exam.neighbours.ExamRoomMove

All Implemented Interfaces:

NeighbourSelection<Exam,ExamPlacement>

public class ExamRoomMove
extends Object
implements NeighbourSelection<Exam,ExamPlacement>

Try to swap a room between two exams. An exam is selected randomly, a different (available) room is randomly selected for the exam -- the exam is assigned into the new room (if the room is used, it tries to swap the rooms between the selected exam and the one that is using it). If an exam is assigned into two or more rooms, only one room is swapped at a time.

Version:

ExamTT 1.3 (Examination Timetabling)
Copyright (C) 2008 - 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
ExamRoomMove(DataProperties properties) Constructor

Method Summary

Modifier and Type	Method and Description
void	init(Solver<Exam,ExamPlacement> solver) Initialization
Neighbour<Exam,ExamPlacement>	selectNeighbour(Solution<Exam,ExamPlacement> solution) Select an exam randomly, select an available period randomly (if it is not assigned, from Exam.getPeriodPlacements()), select rooms using Exam.findRoomsRandom(Assignment, ExamPeriodPlacement)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExamRoomMove

public ExamRoomMove(DataProperties properties)

Constructor

Parameters:

properties - problem properties

Method Detail

init

public void init(Solver<Exam,ExamPlacement> solver)

Initialization

Specified by:

init in interface NeighbourSelection<Exam,ExamPlacement>

Parameters:

solver - current solver

selectNeighbour

public Neighbour<Exam,ExamPlacement> selectNeighbour(Solution<Exam,ExamPlacement> solution)

Select an exam randomly, select an available period randomly (if it is not assigned, from Exam.getPeriodPlacements()), select rooms using Exam.findRoomsRandom(Assignment, ExamPeriodPlacement)

Specified by:

selectNeighbour in interface NeighbourSelection<Exam,ExamPlacement>

Parameters:

solution - given solution

Returns:

a neighbour assignment