/// <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: PROBATIONSTATE
if (student.GradePointAverage > this.UpperLimit)
{
student.GradePointStateId = ProbationState.GetInstance().GradePointStateId;
db.SaveChanges();
}
// Does not need to check lower limit since SuspendedState is the lowest state possible.
}
/// <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: HONOURSSTATE
if (student.GradePointAverage > this.UpperLimit)
{
student.GradePointStateId = HonoursState.GetInstance().GradePointStateId;
}
// Go to lower neighboring sibling: PROBATIONSTATE
if (student.GradePointAverage < this.LowerLimit)
{
student.GradePointStateId = ProbationState.GetInstance().GradePointStateId;
}
db.SaveChanges();
}
/// <summary>
/// Checks for an existing ProbationState instance.
/// Instantiates an ProbationState and populates it to the database if there is none.
/// </summary>
/// <returns>honourState : instance of the ProbationState sub class</returns>
public static ProbationState GetInstance()
{
if (probationState == null)
{
BITCollege_MGContext db = new BITCollege_MGContext();
probationState = db.ProbationStates.SingleOrDefault();
if (probationState == null)
{
ProbationState probationState = new ProbationState();
db.ProbationStates.Add(probationState);
db.SaveChanges();
}
}
return(probationState);
}