registrarcontroller.java

国外的数据结构与算法分析用书

package Controllers;

import Entities.*;
import Interfaces.*;
import Transactions.*;

/**	This class executes registrar transactions 
	in reaction to a choice made by the user. */
public class RegistrarController implements UserController
{

	protected RegistrarInterface inter;

	/**	For the registrar accessing the system, read in a
		transaction and execute it */
	public void initiate(Person newUser)
	{
		inter = new RegistrarInterface();
		Registrar user = (Registrar)newUser; 
		int transId = 0;
		CallNum callNum = null;
		int studentNum = 0;
		String mark = "";
		
		if (user != null)
		{
			do
			{
				transId = inter.getCommandID();
				
				switch (transId)
				{
					case 1:
						studentNum = inter.getStudentNumber();
						callNum = inter.getCallNum();
						EnrollInCourseTrans t1 = new EnrollInCourseTrans();
						t1.executeReg(callNum, studentNum);
						break;
					case 2:
						studentNum = inter.getStudentNumber();
						ListCoursesTrans t2 = new ListCoursesTrans();
						t2.executeReg(studentNum);
						inter.showCourseList(t2.listOfCourses);
						break;
					case 3:
						studentNum = inter.getStudentNumber();
						int pac = inter.getNewPAC();
						ChangePACTrans t3 = new ChangePACTrans();
						t3.executeReg(pac, studentNum);
						break;
					case 4:
						studentNum = inter.getStudentNumber();
						callNum = inter.getCallNum();
						DropCourseTrans t4 = new DropCourseTrans();
						t4.executeReg(callNum, studentNum);
						break;
					case 5:
						studentNum = inter.getStudentNumber();
						ListGradesTrans t5 = new ListGradesTrans();
						t5.executeReg(studentNum);
						inter.showGradeList(t5.gradeList);
						break;
					case 6:
						int deptNum = inter.getDeptNumber();
						int courseNum = inter.getCourseNumber();
						ListOpenSectionsTrans t6 = new ListOpenSectionsTrans();
						t6.execute(deptNum, courseNum);	
						inter.showOpenSectionsList(t6.openSectionsList);
						break;
					case 7:
						studentNum = inter.getStudentNumber();
						ShowFeesTrans t7 = new ShowFeesTrans();
						t7.executeReg(studentNum);
						double totalFees = t7.totalFees;
						double totalPaid = t7.totalPaid;
						inter.showFees(totalFees, totalPaid);
						break;
					case 20:
						studentNum = inter.getStudentNumber();
						StudentGradeTrans t20 = new StudentGradeTrans();
						t20.execute(studentNum);
						inter.showGradeList(t20.gradeList);
						break;
					case 21:
						callNum = inter.getCallNum();
						ClassListTrans t21 = new ClassListTrans();
						t21.execute(callNum);
						inter.showClassList(t21.classList);
						break;
					case 22:
						callNum = inter.getCallNum();
						SectEnrollmentTrans t22 = new SectEnrollmentTrans();
						t22.execute(callNum);
						inter.showEnrollmentLimit(t22.limit); 
						break;
					case 60:
						callNum = inter.getCallNum();
						SectionDetails sec = inter.getSectionDetails();
						AddCourseSectionTrans t60 = new AddCourseSectionTrans();
						t60.execute(callNum, sec);
						break;
					case 61:
						callNum = inter.getCallNum();
						int limit = inter.getLimit();
						ChangeSectionLimitTrans t61 = new ChangeSectionLimitTrans();
						t61.execute(callNum, limit);
						break;
					case 62:
						studentNum = inter.getStudentNumber();
						callNum = inter.getCallNum();
						mark = inter.getStudentMark();
						ChangeGradeTrans t62 = new ChangeGradeTrans();
						t62.execute(studentNum, callNum, mark);
						break;
					case 63:
						studentNum = inter.getStudentNumber();
						callNum = inter.getCallNum();
						mark = inter.getStudentMark();					
						RecordGradeTrans t63 = new RecordGradeTrans();
						t63.execute(studentNum, callNum, mark);
						break;
					case 64:
						studentNum = inter.getStudentNumber();
						double amount = inter.getPayAmount();
						RecordPaymentTrans t64 = new RecordPaymentTrans();
						t64.execute(studentNum ,amount);
						break;
					default:
						if (transId != 99)
							inter.showInvalidChoice();
				}
			} while (transId != 99);
		}
	}

} /* end of RegistrarController */