/**
 * Extended functionality for the student/course interface.
 */
public interface RegistrationExtendedI extends RegistrationI {

  /**
   * Unregister a student from a course. If there are any students waiting
   * to get into this course, attempt to register them. If an exception is
   * thrown trying to register a waiting student, move on to the next
   * waiting student.
   */
  public void unregister(int studentId,String courseId) throws RegException;

  /**
   * Attempt to register for a course. If it is full, go on a waiting list.
   */
  public void registerOrWait(int studentId,String courseId) throws RegException;
}