Subject.java

package Classes;
    
import java.util.ArrayList;
import java.util.List;
import org.bson.Document;
import com.mongodb.client.MongoClient;
import com.mongodb.client.MongoClients;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.FindIterable;

public class Subject {
    private String SubjectCode;
    private String Description;
    private int Units;

    public Subject() {}

    public Subject(String SubjectCode, String Description, int Units) {
        this.SubjectCode = SubjectCode;
        this.Description = Description;
        this.Units = Units;
    }

    public String getSubjectCode() {
        return SubjectCode;
    }

    public void setSubjectCode(String SubjectCode) {
        this.SubjectCode = SubjectCode;
    }

    public String getDescription() {
        return Description;
    }

    public void setDescription(String Description) {
        this.Description = Description;
    }

    public int getUnits() {
        return Units;
    }

    public void setUnits(int Units) {
        this.Units = Units;
    }

    public static MongoDatabase connectToDatabase() {
        String uri = "mongodb://localhost:27017";
        MongoClient mongoClient = MongoClients.create(uri);
        MongoDatabase database = mongoClient.getDatabase("Enrollment"); // Change to the correct database name
        System.out.println("Connected to database: " + database.getName());
        return database;
    }

    public static List<Subject> getAllSubjectsFromDB(MongoDatabase database) {
        MongoCollection<Document> subjectCollection = database.getCollection("Subject"); // Access the 'Subject' collection
        
        List<Subject> subjects = new ArrayList<>();

        // Fetch all subject documents
        FindIterable<Document> subjectIterable = subjectCollection.find();
        for (Document subjectDoc : subjectIterable) {
            String SubjectCode = subjectDoc.getString("SubjectCode");
            String Description = subjectDoc.getString("Description");
            int Units = subjectDoc.getInteger("Units");
            
            // Create a Subject object with the fetched data
            Subject subject = new Subject(SubjectCode, Description, Units);
            subjects.add(subject);
        }
        return subjects;
    }
    public static void printSubjects(List<Subject> subjects) {
        if (subjects == null || subjects.isEmpty()) {
            System.out.println("No students found.");
        } else {
            for (Subject subject : subjects) {
                System.out.println("ID: " + subject.getSubjectCode());
                System.out.println("Name: " + subject.getDescription());
                System.out.println("Course: " + subject.getUnits());
                System.out.println("---------------------------");
            }
        }
    }
}