/*PLEASE DO NOT EDIT THIS CODE*/
/*This code was generated using the UMPLE 1.35.0.7523.c616a4dce modeling language!*/

package example;
import java.util.*;

// line 3 "../OneToNTest.ump"
public class Mentor
{

  //------------------------
  // MEMBER VARIABLES
  //------------------------

  //Mentor Attributes
  private String name;

  //Mentor Associations
  private List<Student> students;

  //------------------------
  // CONSTRUCTOR
  //------------------------

  public Mentor(String aName)
  {
    name = aName;
    students = new ArrayList<Student>();
  }

  //------------------------
  // INTERFACE
  //------------------------

  public boolean setName(String aName)
  {
    boolean wasSet = false;
    name = aName;
    wasSet = true;
    return wasSet;
  }

  public String getName()
  {
    return name;
  }
  /* Code from template association_GetMany */
  public Student getStudent(int index)
  {
    Student aStudent = students.get(index);
    return aStudent;
  }

  public List<Student> getStudents()
  {
    List<Student> newStudents = Collections.unmodifiableList(students);
    return newStudents;
  }

  public int numberOfStudents()
  {
    int number = students.size();
    return number;
  }

  public boolean hasStudents()
  {
    boolean has = students.size() > 0;
    return has;
  }

  public int indexOfStudent(Student aStudent)
  {
    int index = students.indexOf(aStudent);
    return index;
  }
  /* Code from template association_IsNumberOfValidMethod */
  public boolean isNumberOfStudentsValid()
  {
    boolean isValid = numberOfStudents() >= minimumNumberOfStudents() && numberOfStudents() <= maximumNumberOfStudents();
    return isValid;
  }
  /* Code from template association_RequiredNumberOfMethod */
  public static int requiredNumberOfStudents()
  {
    return 4;
  }
  /* Code from template association_MinimumNumberOfMethod */
  public static int minimumNumberOfStudents()
  {
    return 4;
  }
  /* Code from template association_MaximumNumberOfMethod */
  public static int maximumNumberOfStudents()
  {
    return 4;
  }
  /* Code from template association_AddMNToOnlyOne */
  public Student addStudent(String aNumber)
  {
    if (numberOfStudents() >= maximumNumberOfStudents())
    {
      return null;
    }
    else
    {
      return new Student(aNumber, this);
    }
  }

  public boolean addStudent(Student aStudent)
  {
    boolean wasAdded = false;
    if (students.contains(aStudent)) { return false; }
    if (numberOfStudents() >= maximumNumberOfStudents())
    {
      return wasAdded;
    }

    Mentor existingMentor = aStudent.getMentor();
    boolean isNewMentor = existingMentor != null && !this.equals(existingMentor);

    if (isNewMentor && existingMentor.numberOfStudents() <= minimumNumberOfStudents())
    {
      return wasAdded;
    }

    if (isNewMentor)
    {
      aStudent.setMentor(this);
    }
    else
    {
      students.add(aStudent);
    }
    wasAdded = true;
    return wasAdded;
  }

  public boolean removeStudent(Student aStudent)
  {
    boolean wasRemoved = false;
    //Unable to remove aStudent, as it must always have a mentor
    if (this.equals(aStudent.getMentor()))
    {
      return wasRemoved;
    }

    //mentor already at minimum (4)
    if (numberOfStudents() <= minimumNumberOfStudents())
    {
      return wasRemoved;
    }
    students.remove(aStudent);
    wasRemoved = true;
    return wasRemoved;
  }

  public void delete()
  {
    for(int i=students.size(); i > 0; i--)
    {
      Student aStudent = students.get(i - 1);
      aStudent.delete();
    }
  }


  public String toString()
  {
    return super.toString() + "["+
            "name" + ":" + getName()+ "]";
  }
}
/*PLEASE DO NOT EDIT THIS CODE*/
/*This code was generated using the UMPLE 1.35.0.7523.c616a4dce modeling language!*/

package example;

// line 9 "../OneToNTest.ump"
public class Student
{

  //------------------------
  // MEMBER VARIABLES
  //------------------------

  //Student Attributes
  private String number;

  //Student Associations
  private Mentor mentor;

  //------------------------
  // CONSTRUCTOR
  //------------------------

  public Student(String aNumber, Mentor aMentor)
  {
    number = aNumber;
    boolean didAddMentor = setMentor(aMentor);
    if (!didAddMentor)
    {
      throw new RuntimeException("Unable to create student due to mentor. See https://manual.umple.org?RE002ViolationofAssociationMultiplicity.html");
    }
  }

  //------------------------
  // INTERFACE
  //------------------------

  public boolean setNumber(String aNumber)
  {
    boolean wasSet = false;
    number = aNumber;
    wasSet = true;
    return wasSet;
  }

  public String getNumber()
  {
    return number;
  }
  /* Code from template association_GetOne */
  public Mentor getMentor()
  {
    return mentor;
  }
  /* Code from template association_SetOneToAtMostN */
  public boolean setMentor(Mentor aMentor)
  {
    boolean wasSet = false;
    //Must provide mentor to student
    if (aMentor == null)
    {
      return wasSet;
    }

    //mentor already at maximum (4)
    if (aMentor.numberOfStudents() >= Mentor.maximumNumberOfStudents())
    {
      return wasSet;
    }
    
    Mentor existingMentor = mentor;
    mentor = aMentor;
    if (existingMentor != null && !existingMentor.equals(aMentor))
    {
      boolean didRemove = existingMentor.removeStudent(this);
      if (!didRemove)
      {
        mentor = existingMentor;
        return wasSet;
      }
    }
    mentor.addStudent(this);
    wasSet = true;
    return wasSet;
  }

  public void delete()
  {
    Mentor placeholderMentor = mentor;
    this.mentor = null;
    if(placeholderMentor != null)
    {
      placeholderMentor.removeStudent(this);
    }
  }


  public String toString()
  {
    return super.toString() + "["+
            "number" + ":" + getNumber()+ "]" + System.getProperties().getProperty("line.separator") +
            "  " + "mentor = "+(getMentor()!=null?Integer.toHexString(System.identityHashCode(getMentor())):"null");
  }
}