org.cpsolver.exam.criteria

Class InstructorDistanceBackToBackConflicts

java.lang.Object

org.cpsolver.ifs.criteria.AbstractCriterion<Exam,ExamPlacement>

org.cpsolver.exam.criteria.ExamCriterion

org.cpsolver.exam.criteria.StudentDistanceBackToBackConflicts

org.cpsolver.exam.criteria.InstructorDistanceBackToBackConflicts

All Implemented Interfaces:

CanHoldContext, HasAssignmentContext<Exam,ExamPlacement,AbstractCriterion.ValueContext>, Criterion<Exam,ExamPlacement>, ExtendedInfoProvider<Exam,ExamPlacement>, InfoProvider<Exam,ExamPlacement>, ModelListener<Exam,ExamPlacement>

public class InstructorDistanceBackToBackConflicts
extends StudentDistanceBackToBackConflicts

Number of back-to-back distance instructor conflicts. I.e., number of cases when an exam is attended by an instructor that attends some other exam at the previous ExamPeriod.prev() or following ExamPeriod.next() period and the distance ExamPlacement.getDistanceInMeters(ExamPlacement) between these two exams is greater than ExamModel.getBackToBackDistance(). Distance back-to-back conflicts are only considered between consecutive periods that are of the same day.

Distance back-to-back instructor conflict weight can be set by problem property Exams.InstructorDistanceBackToBackConflictWeight, or in the input xml file, property instructorDistanceBackToBackConflictWeight.

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

Nested Class Summary

Nested classes/interfaces inherited from class org.cpsolver.ifs.criteria.AbstractCriterion

AbstractCriterion.ValueContext, AbstractCriterion.ValueUpdateType

Field Summary

Fields inherited from class org.cpsolver.ifs.criteria.AbstractCriterion

iBest, iDebug, iWeight, sDoubleFormat, sPercentFormat

Fields inherited from interface org.cpsolver.ifs.assignment.context.CanHoldContext

sMaxSize

Constructor Summary

Constructors

Constructor and Description
InstructorDistanceBackToBackConflicts()

Method Summary

Modifier and Type	Method and Description
String	getName() Criterion name
double	getValue(Assignment<Exam,ExamPlacement> assignment, ExamPlacement value, Set<ExamPlacement> conflicts) Value of a proposed assignment (including hard conflicts)
double	getWeightDefault(DataProperties config) Defines default weight (when AbstractCriterion.getWeightName() parameter is not present in the criterion).
String	getWeightName() Defines weight name (to be used to get the criterion weight from the configuration).
String	getXmlWeightName() Name of the weight parameter in the parameters section of the examination XML file.
boolean	isPeriodCriterion() True if this criterion is based on period assignment.
String	toString(Assignment<Exam,ExamPlacement> assignment) Simple text representation of the criterion and its value.

Methods inherited from class org.cpsolver.exam.criteria.StudentDistanceBackToBackConflicts

configure, getBackToBackDistance, getInfo, getXmlParameters, setBackToBackDistance, setXmlParameters

Methods inherited from class org.cpsolver.exam.criteria.ExamCriterion

getBounds, getPeriodValue, getRoomValue, isRoomCriterion, setWeight

Methods inherited from class org.cpsolver.ifs.criteria.AbstractCriterion

afterAssigned, afterUnassigned, beforeAssigned, beforeUnassigned, bestRestored, bestSaved, clearCache, computeBounds, constraintAdded, constraintRemoved, createAssignmentContext, getAbbreviation, getAssignmentContextReference, getBest, getBounds, getBounds, getBounds, getContext, getContext, getExtendedInfo, getInfo, getModel, getPerc, getPercentage, getPercRev, getValue, getValue, getValue, getValue, getValueUpdateType, getWeight, getWeightedBest, getWeightedValue, getWeightedValue, getWeightedValue, getWeightedValue, getWeightedValue, getWeightedValue, inc, inc, init, setAssignmentContextReference, setModel, setValueUpdateType, variableAdded, variableRemoved

Methods inherited from class java.lang.Object

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

Constructor Detail

InstructorDistanceBackToBackConflicts

public InstructorDistanceBackToBackConflicts()

Method Detail

getWeightName

public String getWeightName()

Description copied from class: AbstractCriterion

Defines weight name (to be used to get the criterion weight from the configuration).

Overrides:

getWeightName in class StudentDistanceBackToBackConflicts

Returns:

name of the weight associated with this criterion

getXmlWeightName

public String getXmlWeightName()

Description copied from class: ExamCriterion

Name of the weight parameter in the parameters section of the examination XML file.

Overrides:

getXmlWeightName in class StudentDistanceBackToBackConflicts

Returns:

name of the weight parameter in the XML

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 StudentDistanceBackToBackConflicts

Parameters:

config - solver configuration

Returns:

default criterion weight value

getValue

public double getValue(Assignment<Exam,ExamPlacement> assignment,
                       ExamPlacement value,
                       Set<ExamPlacement> conflicts)

Description copied from interface: Criterion

Value of a proposed assignment (including hard conflicts)

Specified by:

getValue in interface Criterion<Exam,ExamPlacement>

Overrides:

getValue in class StudentDistanceBackToBackConflicts

Parameters:

assignment - current assignment

value - given value

conflicts - values conflicting with the given value

Returns:

change in this criterion value when assigned

getName

public String getName()

Description copied from interface: Criterion

Criterion name

Specified by:

getName in interface Criterion<Exam,ExamPlacement>

Overrides:

getName in class StudentDistanceBackToBackConflicts

Returns:

name

toString

public String toString(Assignment<Exam,ExamPlacement> assignment)

Description copied from class: AbstractCriterion

Simple text representation of the criterion and its value. E.g., X:x where X is the AbstractCriterion.getAbbreviation() and x is the current value AbstractCriterion.getValue(Assignment).

Specified by:

toString in interface Criterion<Exam,ExamPlacement>

Overrides:

toString in class StudentDistanceBackToBackConflicts

Parameters:

assignment - current assignment

Returns:

short string representation (e.g., PP:95% for period preference)

isPeriodCriterion

public boolean isPeriodCriterion()

Description copied from class: ExamCriterion

True if this criterion is based on period assignment. Used by ExamPlacement.getTimeCost(Assignment).

Overrides:

isPeriodCriterion in class StudentDistanceBackToBackConflicts

Returns:

true if this criterion is based on period assignment