public void RemoveObserver(IStudentObserver student)
{
for (int i = 0; i < coursesList.Count; i++)
{
coursesList[i].RemoveObserver(student);
}
studentList.Remove(student);
}
private bool ValidateStudent(IStudentObserver o)
{
if (o.NameOfStudent != null && o.Age < 30 && (o.NumberOfStudent >= 10000 && o.NumberOfStudent <= 99999))
{
return(true);
}
else
{
return(false);
}
}
public void AddObserver(IStudentObserver o)
{
for (int i = 0; i < studentObservers.Count; i++)
{
if (studentObservers[i].NumberOfStudent == o.NumberOfStudent)
{
return;
}
}
if (ValidateStudent(o))
{
studentObservers.Add(o);
}
}
public void AddObserver(IStudentObserver student, Course course)
{
for (int i = 0; i < studentList.Count; i++)
{
if (studentList[i].NumberOfStudent == student.NumberOfStudent)
{
return;
}
}
if (ValidateStudent(student))
{
studentList.Add(student);
course.AddObserver(student);
}
}
public void RemoveObserver(IStudentObserver o)
{
studentObservers.Remove(o);
}
public void Detach(IStudentObserver student)
{
studentObserverList.Remove(student);
}
public void Attach(IStudentObserver student)
{
studentObserverList.Add(student);
}