listcoursestrans.java

国外的数据结构与算法分析用书

package Transactions;

import Sets.StudentSet;
import dslib.list.LinkedListUos;
import Entities.*;

/**	Display the course sections a user is enrolled in */
public class ListCoursesTrans
{

	public LinkedListUos listOfCourses;
	
	public void execute(Student user)
	{
		listOfCourses = user.currentCourses;
	}
	
	public void executeReg(int studNum)
	{
		Student student = (Student)StudentSet.rep.obtain(new Integer(studNum));
		if (student != null)
			execute(student);
		else
			listOfCourses = new LinkedListUos();
	}
	
} /* end of ListCoursesTrans */