hi

src/main/java/sba/sms/models/Course.java

@@ -2,19 +2,119 @@
 
 import jakarta.persistence.*;
 import lombok.*;
-import lombok.experimental.FieldDefaults;
 
-import java.util.LinkedHashSet;
+import java.util.HashSet;
 import java.util.Objects;
 import java.util.Set;
 
 /**
  * Course is a POJO, configured as a persistent class that represents (or maps to) a table
  * name 'course' in the database. A Course object contains fields that represent course
- * information and a mapping of 'courses' that indicate an inverse or referencing side
+ * information and a mapping of  that indicate an inverse or referencing side
  * of the relationship. Implement Lombok annotations to eliminate boilerplate code.
  */
 
+@Entity
+
 public class Course {
 
-}
+    // Getter Setter methods
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id", nullable = false)
+    private int id;
+
+    @Column(name = "name", length = 50, nullable = false)
+    private String name;
+
+
+    @Column(name = "instructor", length = 50, nullable = false)
+    private String instructor;
+
+    @ManyToMany(mappedBy = "courses", fetch = FetchType.EAGER, cascade = {CascadeType.DETACH, CascadeType.REMOVE, CascadeType.MERGE, CascadeType.PERSIST})
+    private Set<Student> students = new HashSet<>();
+
+    public Course(){
+
+    }
+
+
+    public Course(int id, String name, String instructor, Set<Student> students){
+        this.id = id;
+        this.name = name;
+        this.instructor = instructor;
+        this.students = students;
+    }
+
+    // Required-args constructor
+    public Course(String name, String instructor){
+        this.name = name;
+        this.instructor = instructor;
+    }
+
+    public int getId(){
+        return id;
+    }
+
+    public void setId(int id){
+        this.id = id;
+    }
+
+    public String getName(){
+        return name;
+    }
+
+    public void setName(String name){
+        this.name = name;
+    }
+
+    public String getInstructor(){
+        return instructor;
+    }
+
+    public void setInstructor(String instructor){
+        this.instructor = instructor;
+    }
+
+    public Set<Student> getStudents(){
+        return students;
+    }
+
+    public void setStudents(Set<Student> students){
+        this.students = students;
+    }
+
+    // toString method
+    @Override
+    public String toString(){
+        return "Course{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", instructor='" + instructor + '\'' +
+                '}';
+
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Course course = (Course) o;
+        return id == course.id && Objects.equals(name, course.name) && Objects.equals(instructor, course.instructor) && Objects.equals(students, course.students);
+    }
+
+
+    // hash code method
+    @Override
+    public int hashCode(){
+        return Objects.hash(id, name ,instructor);
+    }
+
+    //Helper method
+    public boolean hasStudent(Student student){
+        return this.students.contains(student);
+    }
+
+
+
+}

src/main/java/sba/sms/models/Student.java

@@ -2,9 +2,8 @@
 
 import jakarta.persistence.*;
 import lombok.*;
-import lombok.experimental.FieldDefaults;
 
-import java.util.LinkedHashSet;
+import java.util.HashSet;
 import java.util.Objects;
 import java.util.Set;
 
@@ -13,14 +12,111 @@
  * Student is a POJO, configured as a persistent class that represents (or maps to) a table
  * name 'student' in the database. A Student object contains fields that represent student
  * login credentials and a join table containing a registered student's email and course(s)
- * data. The Student class can be viewed as the owner of the bi-directional relationship.
+ * data. The Student class can be viewed as the owner of the relationship.
  * Implement Lombok annotations to eliminate boilerplate code.
  */
+@NoArgsConstructor
 
+
+
+@Table (name = "student")
+@Entity
 public class Student {
+    // Getter Setters
+    @Id
+    @Column(name = "email", length = 50, nullable = false)
+    private String email;
+
+    @Column(name = "name", length = 50, nullable = false)
+    private String name;
+
+    @Column(name = "password", length = 50, nullable = false)
+    private String password;
+
+    @ManyToMany(fetch = FetchType.EAGER, cascade = {CascadeType.DETACH, CascadeType.REMOVE, CascadeType.MERGE, CascadeType.PERSIST})
+    @JoinTable(
+            name = "student_courses",
+            joinColumns = @JoinColumn(name = "student_email"),
+            inverseJoinColumns = @JoinColumn(name = "course_id")
+    )
+    private Set<Course> courses = new HashSet<>();
 
 
+    //
+    public Student(String email, String name, String password, Set<Course> courses){
+        this.email = email;
+        this.name = name;
+        this.password = password;
+        this.courses = courses;
+    }
+
+    public Student(String email, String name, String password) {
+        this.email = email;
+        this.name = name;
+        this.password = password;
+    }
+
+    public String getEmail(){
+        return email;
+    }
+
+    public void setEmail(String email){
+        this.email = email;
+    }
+
+    public String getName(){
+        return name;
+    }
+
+    public void setName(String name){
+        this.name = name;
+    }
+
+    public String getPassword(){
+        return password;
+    }
+
+    public void setPassword(String password){
+        this.password = password;
+    }
+
+    public Set<Course> getCourses(){
+        return courses;
+    }
+
+    public void setCourses(Set<Course> courses){
+        this.courses = courses;
+    }
+
+    public static void addCourse(Course courseById) {
+
+    }
+
+
+    @Override
+    public String toString(){
+        return "Student{" +
+                "email='" + email + '\'' +
+                ", name='" + name + '\'' +
+                ", password='" + password + '\'' +
+                '}';
+    }
+
+    @Override
+    public boolean equals(Object o){
+        if(this == o) return true;
+        if(o == null || getClass() != o.getClass()) return false;
+        Student student = (Student) o;
+        return Objects.equals(email, student.email) &&
+                Objects.equals(name, student.name) &&
+                Objects.equals(password, student.password);
+    }
+
+    @Override
+    public int hashCode(){
+        return Objects.hash(email, name, password);
     }
 
 
 
+}

src/main/java/sba/sms/services/CourseService.java

@@ -2,12 +2,14 @@
 
 import org.hibernate.HibernateException;
 import org.hibernate.Session;
+import org.hibernate.SessionFactory;
 import org.hibernate.Transaction;
 import org.hibernate.query.Query;
 import sba.sms.dao.CourseI;
 import sba.sms.models.Course;
 import sba.sms.utils.HibernateUtil;
 
+import javax.security.auth.login.Configuration;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -16,6 +18,62 @@
  * CourseI interface, overrides all abstract service methods and
  * provides implementation for each method.
  */
-public class CourseService {
+public class CourseService implements CourseI{
 
-}
+    @Override
+    public void createCourse(Course course) {
+        Session s = HibernateUtil.getSessionFactory().openSession();
+        Transaction tx = null;
+
+        try{
+            tx = s.beginTransaction();
+            s.persist(course);
+            tx.commit();
+        } catch (HibernateException exception){
+            if(tx != null) tx.rollback();
+        } finally {
+            s.close();
+        }
+    }
+
+    @Override
+    public Course getCourseById(int courseId) {
+        Session s = HibernateUtil.getSessionFactory().openSession();
+        Transaction tx = null;
+        Course course = new Course();
+
+        try{
+            tx = s.beginTransaction();
+            Query<Course> q = s.createQuery("from Course where id = :id", Course.class);
+            q.setParameter("id", courseId);
+            course = q.getSingleResult();
+            tx.commit();
+        } catch (HibernateException exception){
+            if(tx != null) tx.rollback();
+            exception.printStackTrace();
+        } finally {
+            s.close();
+        }
+        return course;
+    }
+
+    @Override
+    public List<Course> getAllCourses() {
+        Session s = HibernateUtil.getSessionFactory().openSession();
+        Transaction tx = null;
+        List<Course> courseList = new ArrayList<>();
+
+        try{
+            tx = s.beginTransaction();
+            Query<Course> q = s.createQuery("from Course", Course.class);
+            courseList = q.getResultList();
+            tx.commit();
+        } catch (HibernateException exception){
+            if(tx != null) tx.rollback();
+            exception.printStackTrace();
+        } finally {
+            s.close();
+        }
+        return courseList;
+    }
+}