/// <summary>
/// Changes Student GradePointState from one state to another depending on the GradePointAverage.
/// </summary>
/// <param name="student">Student object</param>
public override void StateChangeCheck(Student student)
{
// Go to higher neighboring sibling: REGULARSTATE
if (student.GradePointAverage > this.UpperLimit)
{
student.GradePointStateId = RegularState.GetInstance().GradePointStateId;
}
// Go to lower neighboring sibling: SUSPENDEDSTATE
if (student.GradePointAverage < this.LowerLimit)
{
student.GradePointStateId = SuspendedState.GetInstance().GradePointStateId;
}
db.SaveChanges();
}
/// <summary>
/// Checks for an existing SuspendedState instance.
/// Instantiates an SuspendedState and populates it to the database if there is none.
/// </summary>
/// <returns>honourState : instance of the SuspendedState sub class</returns>
public static SuspendedState GetInstance()
{
if (suspendedState == null)
{
BITCollege_MGContext db = new BITCollege_MGContext();
suspendedState = db.SuspendedStates.SingleOrDefault();
if (suspendedState == null)
{
SuspendedState suspendedState = new SuspendedState();
db.SuspendedStates.Add(suspendedState);
db.SaveChanges();
}
}
return(suspendedState);
}
