학점 산출 프로그램 (2)

Section 1. 학점 평가 정책

1. 전공과목  vs  일반 과목

• 학생의 전공에 따라 과목의 학점을 다르게 산출함
  

• GradeEvaluation 인터페이스

public interface GradeEvaluation {
	public String getGrade(int point);
}

• 일반 과목 BasicEvaluation 클래스

public  class BasicEvaluation implements GradeEvaluation{

	@Override
	public String getGrade(int point) {
		String grade;
		
		if(point >=90 && point <=100)
			grade = "A";
		else if(point >=80 && point <=89)
			grade = "B";
		else if(point >=70 && point <=79)
			grade = "C";
		else if(point >=55 && point <=69)
			grade = "D";
		else
			grade = "F";
		return grade;
	}
}

• 일반 과목 MajorEvaluation 클래스

public class MajorEvaluation implements GradeEvaluation{

	@Override
	public String getGrade(int point) {
		String grade;
		if(point >=95 && point <=100)
			grade = "S";
		else if(point >=90 && point <=94)
			grade = new String("A");
		else if(point >=80 && point <=89)
			grade = "B";
		else if(point >=70 && point <=79)
			grade = "C";
		else if(point >=60 && point <=69)
			grade = "D";
		else
			grade = "F";
		return grade;
	}
}

---

Section 2. 리포트 클래스

1. 리포트 클래스

• 학점 평가에 사용되는 클래스들을 인스턴스화 하고 각 과목에 대한 학생들의 학점을 표로 출력
• StringBuffer 클래스를 이용하여 내용을 만들고 난후 toString()을 호출

2. 리포트 클래스 구현

public class GenerateGradeReport {
	
	School school = School.getInstance();
	public static final String TITLE = " 수강생 학점 \t\t\n";
	public static final String HEADER = " 이름  |  학번  |중점과목| 점수   \n";
	public static final String LINE = "-------------------------------------\n";
	private StringBuffer buffer = new StringBuffer();  
	
	public String getReport(){
		ArrayList<Subject> subjectList = school.getSubjectList();  // 모든 과목에 대한 학점 산출
		for( Subject subject : subjectList) {
			makeHeader(subject);
			makeBody(subject);
			makeFooter();
		}
		return buffer.toString();  // String 으로 반환
	}
	
	public void makeHeader(Subject subject){
		buffer.append(GenerateGradeReport.LINE);
		buffer.append("\t" + subject.getSubjectName());
		buffer.append(GenerateGradeReport.TITLE );
		buffer.append(GenerateGradeReport.HEADER );
		buffer.append(GenerateGradeReport.LINE);
	} 
	
	public void makeBody(Subject subject){
		
		ArrayList<Student> studentList = subject.getStudentList();  // 각 과목의 학생들
		
		for(int i=0; i<studentList.size(); i++){
			Student student = studentList.get(i);
			buffer.append(student.getStudentName());
			buffer.append(" | ");
			buffer.append(student.getStudentId());
			buffer.append(" | ");
			buffer.append(student.getMajorSubject().getSubjectName() + "\t");
			buffer.append(" | ");
			
			getScoreGrade(student, subject.getSubjectId());  //학생별 해당과목 학점 계산
			buffer.append("\n");
			buffer.append(LINE);
		}
	}
		
		public void getScoreGrade(Student student, int subjectId){
			
			ArrayList<Score> scoreList = student.getScoreList();
			int majorId = student.getMajorSubject().getSubjectId();
			
			GradeEvaluation[] gradeEvaluation = {new BasicEvaluation(), new MajorEvaluation()};  //학점 평가 클래스들
			
			for(int i=0; i<scoreList.size(); i++){  // 학생이 가진 점수들 
				
				Score score = scoreList.get(i);
				if(score.getSubject().getSubjectId() == subjectId) {  // 현재 학점을 산출할 과목 
					String grade;
					if(score.getSubject().getSubjectId() == majorId)  // 중점 과목인 경우
						grade = gradeEvaluation[Define.SAB_TYPE].getGrade(score.getPoint());  //중점 과목 학점 평가 방법
					else
						grade = gradeEvaluation[Define.AB_TYPE].getGrade(score.getPoint()); // 중점 과목이 아닌 경우
					buffer.append(score.getPoint());
					buffer.append(":");
					buffer.append(grade);
					buffer.append(" | ");
				}
			}
		}
		
		public void makeFooter(){
			buffer.append("\n");
		}
}

---

Section 3. Main 부분

1. Main 부분

public class TestMain {
	
	School HongSchool = School.getInstance();
	Subject korean;
	Subject math;
	
	GenerateGradeReport gradeReport = new GenerateGradeReport();
	
	public static void main(String[] args) {
		
		TestMain test = new TestMain();
		
		test.createSubject();
		test.createStudent();
		
		
		String report = test.gradeReport.getReport(); 
		System.out.println(report);

	}
	
	
	public void createSubject() {
		
		korean = new Subject("국어", Define.KOREAN, Define.AB_TYPE);
		math = new Subject("수학", Define.MATH, Define.AB_TYPE);
		
		HongSchool.addSubject(korean);
		HongSchool.addSubject(math);

	}
	
	public void createStudent() {
		
		Student student1 = new Student(211213, "강감찬", korean  );
		Student student2 = new Student(212330, "김유신", math  );
		Student student3 = new Student(201518, "신사임당", korean  );
		Student student4 = new Student(202360, "이순신", korean  );
		Student student5 = new Student(201290, "홍길동", math );
		
		HongSchool.addStudent(student1);
		HongSchool.addStudent(student2);
		HongSchool.addStudent(student3);
		HongSchool.addStudent(student4);
		HongSchool.addStudent(student5);

		korean.register(student1);
		korean.register(student2);
		korean.register(student3);
		korean.register(student4);
		korean.register(student5);
		
		math.register(student1);
		math.register(student2);
		math.register(student3);
		math.register(student4);
		math.register(student5);
		
		
		addScoreForStudent(student1, korean, 95); 
		addScoreForStudent(student1, math, 56);	
		
		addScoreForStudent(student2, korean, 95); 
		addScoreForStudent(student2, math, 95);	
		
		addScoreForStudent(student3, korean, 100); 
		addScoreForStudent(student3, math, 88);	
		
		addScoreForStudent(student4, korean, 89); 
		addScoreForStudent(student4, math, 95);	
		
		addScoreForStudent(student5, korean, 85); 
		addScoreForStudent(student5, math, 56);	
		
		

	}
	
	public void addScoreForStudent(Student student, Subject subject, int point ) {
		
		Score score = new Score(student.getStudentId(), subject, point);
		student.addStudentScore(score);
	}

}