org.cpsolver.studentsct.heuristics.studentord

## Class StudentGroupsChoiceRealFirstOrder

- java.lang.Object
- - org.cpsolver.studentsct.heuristics.studentord.StudentChoiceOrder
  - - org.cpsolver.studentsct.heuristics.studentord.StudentGroupsChoiceRealFirstOrder

- All Implemented Interfaces:
    Comparator<Student>, StudentOrder

      public class StudentGroupsChoiceRealFirstOrder
      extends StudentChoiceOrder

  Return the given set of students in an order of average number of request groups of each student. If two students are involved in the same number of groups, the comparison falls down to the average number of choices of each student (students with less choices first).
  Version:
    StudentSct 1.3 (Student Sectioning)
    Copyright (C) 2015 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/.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `StudentGroupsChoiceRealFirstOrder()`
    `StudentGroupsChoiceRealFirstOrder(DataProperties config)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `compare(Student s1, Student s2)`
    `double` | `nrGroups(Student s)` Average number of request groups that the student is involved in

    - ### Methods inherited from class org.cpsolver.studentsct.heuristics.studentord.StudentChoiceOrder

      `avgNrChoices, getRequestPriority, isCriticalOnly, isReverse, order, setCriticalOnly, setRequestPriority, setReverse`

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

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

    - ### Methods inherited from interface java.util.Comparator

      `comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong`

- - ### Constructor Detail

    - #### StudentGroupsChoiceRealFirstOrder

          public StudentGroupsChoiceRealFirstOrder(DataProperties config)

    - #### StudentGroupsChoiceRealFirstOrder

          public StudentGroupsChoiceRealFirstOrder()

  - ### Method Detail

    - #### compare

          public int compare(Student s1,
                             Student s2)

      Specified by:
        `compare` in interface `Comparator<Student>`
      Overrides:
        `compare` in class `StudentChoiceOrder`

    - #### nrGroups

          public double nrGroups(Student s)

      Average number of request groups that the student is involved in
      Returns:
        number of groups / number of requests