// Set a grade for a currently enrolled applicant
public void EnterMark(Applicant applicant, int mark)
{
// Check for errors before entering a grade
// Applicant may have already passed exam or not be enrolled on it
if (GradeArchive.ContainsKey(applicant) == true) //passed, so not currrently enrolled
{
AlreadyPassedException apException = new AlreadyPassedException(applicant.RegNo);
throw (apException);
}
else if (EnrolledApplicants.ContainsKey(applicant.RegNo) == false) //not currently enrolled
{
NotEnrolledException neException = new NotEnrolledException(applicant.RegNo);
throw (neException);
}
else
{
// Add Applicant to the Dictionary
EnrolledApplicants.Add(applicant.RegNo, applicant);
// Get the Applicant to add this ForceService to its 'enrolled' List
applicant.AddForceService(this);
ResultInput ri = new ResultInput(this, applicant, mark);
// If applicant has passed the exam
if (mark >= AppData.PASSMARK)
{
// Add the ResultInput and its associated Applicant
// to the GradeArchive dictionary.
GradeArchive.Add(applicant, ri);
// Remove Applicant from the currentlyEnrolled dictionary
EnrolledApplicants.Remove(applicant.RegNo);
// Get the Applicant to remove Exam/ForceService course from its 'enrolled' list
applicant.DropForceService(this);
}
}
}
// Unenrol an applicant for a military force
public void Unenrol(Applicant applicant)
{
// check for applicant enrolment
if (GradeArchive.ContainsKey(applicant) == true) // passed
{
AlreadyPassedException apException = new AlreadyPassedException(applicant.RegNo);
throw (apException);
}
else if (EnrolledApplicants.ContainsKey(applicant.RegNo) == false) // not currently enrolled
{
NotEnrolledException neException = new NotEnrolledException(applicant.RegNo);
throw (neException);
}
else
{
// Remove Student from currentlyEnrolled dictionary
EnrolledApplicants.Remove(applicant.RegNo);
// Get the Applicant to remove Service from its 'enrolled' list
applicant.DropForceService(this);
}
}