net.sf.cpsolver.coursett.constraint
Class IgnoreStudentConflictsConstraint

java.lang.Object
  extended by net.sf.cpsolver.ifs.model.Constraint<Lecture,Placement>
      extended by net.sf.cpsolver.coursett.constraint.IgnoreStudentConflictsConstraint
All Implemented Interfaces:
Comparable<Constraint<Lecture,Placement>>

public class IgnoreStudentConflictsConstraint
extends Constraint<Lecture,Placement>

Ignore student conflicts constraint.
This constraint keeps track of classes between which student conflicts of any kind are to be ignored. This constraint is used by Lecture.isToIgnoreStudentConflictsWith(Lecture) and translates to StudentConflict.ignore(Lecture, Lecture) that is true when the two classes are connected by this constraint.

Version:
CourseTT 1.2 (University Course Timetabling)
Copyright (C) 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/.

Field Summary
static String REFERENCE
           
 
Fields inherited from class net.sf.cpsolver.ifs.model.Constraint
iAssignedVariables, iConstraintListeners, iId
 
Constructor Summary
IgnoreStudentConflictsConstraint()
           
 
Method Summary
 void addVariable(Lecture variable)
          Add a variable to this constraint
 void computeConflicts(Placement value, Set<Placement> conflicts)
          The only method which has to be implemented by any constraint.
 boolean isHard()
          Returns true if the constraint is hard.
 
Methods inherited from class net.sf.cpsolver.ifs.model.Constraint
addConstraintListener, assigned, assignedVariables, compareTo, constraintListeners, countAssignedVariables, countVariables, equals, getDescription, getId, getModel, getName, hashCode, inConflict, isConsistent, removeConstraintListener, removeVariable, setModel, unassigned, variables
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

REFERENCE

public static final String REFERENCE
See Also:
Constant Field Values
Constructor Detail

IgnoreStudentConflictsConstraint

public IgnoreStudentConflictsConstraint()
Method Detail

addVariable

public void addVariable(Lecture variable)
Description copied from class: Constraint
Add a variable to this constraint

Overrides:
addVariable in class Constraint<Lecture,Placement>

computeConflicts

public void computeConflicts(Placement value,
                             Set<Placement> conflicts)
Description copied from class: Constraint
The only method which has to be implemented by any constraint. It returns the values which needs to be unassigned in order to make this constraint consistent with the given value if it is assigned to its variable. The computed list of conflicting values is added to the given set of conflicts.

Specified by:
computeConflicts in class Constraint<Lecture,Placement>
Parameters:
value - value to be assigned to its varaible
conflicts - resultant set of conflicting values

isHard

public boolean isHard()
Description copied from class: Constraint
Returns true if the constraint is hard. Only hard constraints are allowed to unassign a variable when there is a conflict with a value that is being assigned

Overrides:
isHard in class Constraint<Lecture,Placement>


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