net.sf.cpsolver.coursett.criteria.additional
Class RoomSizePenalty
java.lang.Object
net.sf.cpsolver.ifs.criteria.AbstractCriterion<Lecture,Placement>
net.sf.cpsolver.coursett.criteria.TimetablingCriterion
net.sf.cpsolver.coursett.criteria.additional.RoomSizePenalty
- All Implemented Interfaces:
- Criterion<Lecture,Placement>, InfoProvider<Lecture>, ModelListener<Lecture,Placement>
public class RoomSizePenalty
- extends TimetablingCriterion
Cost for using room(s) that are too big. I.e., a difference between size of the assigned room and the size of the
smallest room in which the class can be placed Lecture.minRoomSize()
.
A weight for room size penalty can be set by problem property Comparator.RoomSizeWeight.
The difference function can be made polynomial by using Comparator.RoomSizeFactor parameter
(defaults to 1.05). The value of this criteria is then cubed by the power of this room
size factor. This is to be able to favor a room swap between two classes at the same time,
in which a smaller class takes a smaller room. To do this, set Comparator.RoomSizeFactor to
a number bigger than one that is close to one (e.g., 1.05).
- Version:
- CourseTT 1.2 (University Course Timetabling)
Copyright (C) 2006 - 2013 Tomas Muller
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/.
Methods inherited from class net.sf.cpsolver.ifs.criteria.AbstractCriterion |
afterAssigned, afterUnassigned, beforeAssigned, beforeUnassigned, bestRestored, bestSaved, clearCache, computeBounds, constraintAdded, constraintRemoved, getBest, getBounds, getBounds, getInfo, getModel, getName, getPerc, getPercRev, getValue, getValue, getWeight, getWeightedBest, getWeightedValue, getWeightedValue, getWeightedValue, getWeightName, inc, variableAdded, variableRemoved |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
RoomSizePenalty
public RoomSizePenalty()
init
public boolean init(Solver<Lecture,Placement> solver)
- Description copied from interface:
ModelListener
- Notification that the model was initialized by the solver.
- Specified by:
init
in interface ModelListener<Lecture,Placement>
- Overrides:
init
in class TimetablingCriterion
- Parameters:
solver
- IFS solver
getWeightDefault
public double getWeightDefault(DataProperties config)
- Description copied from class:
AbstractCriterion
- Defines default weight (when
AbstractCriterion.getWeightName()
parameter is not present in the criterion).
- Overrides:
getWeightDefault
in class AbstractCriterion<Lecture,Placement>
getPlacementSelectionWeightName
public String getPlacementSelectionWeightName()
- Overrides:
getPlacementSelectionWeightName
in class TimetablingCriterion
getValue
public double getValue(Placement value,
Set<Placement> conflicts)
- Description copied from interface:
Criterion
- Value of a proposed assignment (including hard conflicts)
getInfo
public void getInfo(Map<String,String> info)
- Description copied from interface:
InfoProvider
- Adds some information into the table with information about the solution
- Specified by:
getInfo
in interface InfoProvider<Lecture>
- Overrides:
getInfo
in class AbstractCriterion<Lecture,Placement>
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