data/· managed by dataManager

Data files

Each entity type lives in its own text file, one record per line, fields separated by | and lists by commas. The columns below are taken from the load and save methods.

delimiter |list separator ,missing file → empty listplain-text passwords

How files connect#

Student · 7+ fields per line

`students.txt`#

One student per line. The last column lists enrolled course codes. Read by loadStudents(), written by saveStudents().

students.txtsample · 3 lines

Sara Khalid|2200000001|Student1234|sara.k@uni.example|0500000101|North Residence|15|CS102,MATH201
Noura Saleh|2200000002|Noura12345|noura.s@uni.example|0500000102|West Campus|12|CS102,PHYS101
Faisal Omar|2200000003|Faisal1234|faisal.o@uni.example|0500000103|East Gate|18|ENG101,PHYS101

# Field Java type How it loads

0 name String parts[0]

1 id String parts[1], must be unique

2 password String parts[2], stored as plain text

3 email String parts[3]

4 phoneNumber String parts[4]

5 address String parts[5]

6 creditLimit int Integer.parseInt(parts[6])

7 enrolledCourses List<Course> parts[7] split on commas → getCourseByCode()

#	Field	Java type	How it loads
0	`name`	`String`	parts[0]
1	`id`	`String`	parts[1], must be unique
2	`password`	`String`	parts[2], stored as plain text
3	`email`	`String`	parts[3]
4	`phoneNumber`	`String`	parts[4]
5	`address`	`String`	parts[5]
6	`creditLimit`	`int`	Integer.parseInt(parts[6])
7	`enrolledCourses`	`List<Course>`	parts[7] split on commas → getCourseByCode()

enrolledCourses → courses.txt by code

Instructor · 6+ fields per line

`instructors.txt`#

Profile fields only. Courses point at instructors, not the other way round. Read by loadInstructors(), written by saveInstructors().

instructors.txtsample · 2 lines

Lina Haddad|4000000001|Teacher1234|lina.h@uni.example|0500000201|Faculty Block A
Omar Faris|4000000002|Teacher5678|omar.f@uni.example|0500000202|Faculty Block B

# Field Java type How it loads

0 name String parts[0]

1 id String parts[1], must be unique

2 password String parts[2]

3 email String parts[3]

4 phoneNumber String parts[4]

5 address String parts[5]

#	Field	Java type	How it loads
0	`name`	`String`	parts[0]
1	`id`	`String`	parts[1], must be unique
2	`password`	`String`	parts[2]
3	`email`	`String`	parts[3]
4	`phoneNumber`	`String`	parts[4]
5	`address`	`String`	parts[5]

Administrator · 6+ fields per line

`administrators.txt`#

Same layout as instructors. The default admin is added at start-up if its ID is not already here. Read by loadAdministrators(), written by saveAdministrators().

administrators.txtsample · 1 lines

Registrar Office|1000000001|Registrar2026|registrar@uni.example|0500000301|Admin Building

# Field Java type How it loads

0 name String parts[0]

1 id String parts[1], must be unique

2 password String parts[2]

3 email String parts[3]

4 phoneNumber String parts[4]

5 address String parts[5]

#	Field	Java type	How it loads
0	`name`	`String`	parts[0]
1	`id`	`String`	parts[1], must be unique
2	`password`	`String`	parts[2]
3	`email`	`String`	parts[3]
4	`phoneNumber`	`String`	parts[4]
5	`address`	`String`	parts[5]

Course · 8+ fields per line

`courses.txt`#

Empty schedule, description or instructor columns load as null. Read by loadCourses(), written by saveCourses().

courses.txtsample · 5 lines

Programming II|CS102|Sun/Tue 10:00|Object-oriented programming in Java|Open|4000000001|30|3|2200000001,2200000002
Discrete Mathematics|MATH201|Mon/Wed 12:00|Logic, sets and proofs|Open|4000000002|25|3|2200000001
Data Structures|CS210|Sun/Tue 13:00|Lists, trees and graphs|Open|4000000001|20|4|
Technical Writing|ENG101|Thu 09:00|Reports, memos and presentations|Closed|4000000002|20|2|2200000003
Physics I|PHYS101|Mon/Wed 08:00||Open||2|4|2200000002,2200000003

# Field Java type How it loads

0 courseName String parts[0]

1 courseCode String parts[1], must be unique

2 schedule String parts[2], empty → null

3 description String parts[3], empty → null

4 enrollmentStatus EnrollmentStatusEnum valueOf(parts[4]): Open or Closed

5 instructor Instructor parts[5] → getInstructorById(), empty → null

6 capacity int Integer.parseInt(parts[6])

7 creditHours int Integer.parseInt(parts[7])

8 enrolledStudents List<Student> parts[8] split on commas → getStudentById()

#	Field	Java type	How it loads
0	`courseName`	`String`	parts[0]
1	`courseCode`	`String`	parts[1], must be unique
2	`schedule`	`String`	parts[2], empty → null
3	`description`	`String`	parts[3], empty → null
4	`enrollmentStatus`	`EnrollmentStatusEnum`	valueOf(parts[4]): Open or Closed
5	`instructor`	`Instructor`	parts[5] → getInstructorById(), empty → null
6	`capacity`	`int`	Integer.parseInt(parts[6])
7	`creditHours`	`int`	Integer.parseInt(parts[7])
8	`enrolledStudents`	`List<Student>`	parts[8] split on commas → getStudentById()

instructor → instructors.txt by id
enrolledStudents → students.txt by id

Assessment · 5+ fields per line

`assessments.txt`#

One grade per line, keyed by student, course and exam type. Read by loadAssessments(), written by saveAssessments().

assessments.txtsample · 5 lines

2200000001|CS102|Quiz_1|88.0|Quiz_1
2200000001|CS102|Midterm_1|91.5|Midterm_1
2200000002|CS102|Quiz_1|76.0|Quiz_1
2200000001|MATH201|Quiz_1|69.0|Quiz_1
2200000003|ENG101|Project|94.0|Project

# Field Java type How it loads

0 studentId String parts[0]

1 courseCode String parts[1]

2 examType ExamType valueOf(parts[2])

3 score double Double.parseDouble(parts[3])

4 assessmentName String parts[4], the exam type's name when graded in the app

#	Field	Java type	How it loads
0	`studentId`	`String`	parts[0]
1	`courseCode`	`String`	parts[1]
2	`examType`	`ExamType`	valueOf(parts[2])
3	`score`	`double`	Double.parseDouble(parts[3])
4	`assessmentName`	`String`	parts[4], the exam type's name when graded in the app

studentId → students.txt by id
courseCode → courses.txt by code

How files connect#

students.txt#

instructors.txt#

administrators.txt#

courses.txt#

assessments.txt#

`students.txt`#

`instructors.txt`#

`administrators.txt`#

`courses.txt`#

`assessments.txt`#