org.cpsolver.studentsct.heuristics.selection

## Class ResectionUnassignedStudentsSelection

- java.lang.Object
- - org.cpsolver.studentsct.heuristics.selection.BranchBoundSelection
  - - org.cpsolver.studentsct.heuristics.selection.ResectionUnassignedStudentsSelection

- All Implemented Interfaces:
    NeighbourSelection<Request,Enrollment>, InfoProvider<Request,Enrollment>, SolverListener<Request,Enrollment>

      public class ResectionUnassignedStudentsSelection
      extends BranchBoundSelection

  Resection studends with empty schedule. An extension of `BranchBoundSelection`, where only students that have no enrollments ( `Student.nrAssignedRequests(Assignment)` is zero) are resectioned.
  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/.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.cpsolver.studentsct.heuristics.selection.BranchBoundSelection

      `BranchBoundSelection.BranchBoundNeighbour, BranchBoundSelection.Selection`

  - ### Field Summary

    - ### Fields inherited from class org.cpsolver.studentsct.heuristics.selection.BranchBoundSelection

      `iBranchWhenSelectedHasNoConflict, iDistanceConflict, iDistConfWeight, iFilter, iMinimizePenalty, iModel, iNbrIterations, iNbrNoSolution, iNbrTimeoutReached, iOrder, iStudentQuality, iStudents, iTimeout, iTimeOverlaps, iTimesToAvoidHeuristics, iTotalTime, sDebug`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ResectionUnassignedStudentsSelection(DataProperties properties)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `init(Solver<Request,Enrollment> solver)` Criterion initialization
    `Neighbour<Request,Enrollment>` | `selectNeighbour(Solution<Request,Enrollment> solution)` Select neighbour.

    - ### Methods inherited from class org.cpsolver.studentsct.heuristics.selection.BranchBoundSelection

      `addStudent, getFilter, getInfo, getInfo, getSelection, init, neighbourFailed, neighbourSelected, nextStudent, setModel, valueSelected, variableSelected, withFilter`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### ResectionUnassignedStudentsSelection

          public ResectionUnassignedStudentsSelection(DataProperties properties)

  - ### Method Detail

    - #### init

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

      Description copied from interface: `NeighbourSelection`
      Criterion initialization
      Specified by:
        `init` in interface `NeighbourSelection<Request,Enrollment>`
      Overrides:
        `init` in class `BranchBoundSelection`
      Parameters:
        `solver` - current solver

    - #### selectNeighbour

          public Neighbour<Request,Enrollment> selectNeighbour(Solution<Request,Enrollment> solution)

      Select neighbour. All students with an empty schedule are taken, one by one in a random order. For each student a branch & bound search is employed.
      Specified by:
        `selectNeighbour` in interface `NeighbourSelection<Request,Enrollment>`
      Overrides:
        `selectNeighbour` in class `BranchBoundSelection`
      Parameters:
        `solution` - given solution
      Returns:
        a neighbour assignment