add TP03 SCR

DEV/DEV3.1/TP01/Exercise1/Database.java

@@ -3,18 +3,10 @@ import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.util.ArrayList;
 
 public class Database {
     
-    //Countries
-    public static String COUNTRY_ID = "id";
-    public static String COUNTRY_NAME = "name";
-
-    //Votes table 
-    public static String VOTES_COMPETITOR_ID = "competitor_id";
-    public static String VOTES_VOTER_ID = "voter_id";
-    public static String VOTES_POINTS = "points";
-    
     private Connection connection; 
 
     public Database() {
@@ -33,13 +25,23 @@ public class Database {
         }
     }
 
-    public ResultSet getVotesFromCompetitor(String country) {
+    public Votes getVotesFromCompetitor(String country) {
         try {
             PreparedStatement query = this.connection.prepareStatement(
-                "SELECT Countries.name, Countries.points FROM Votes INNER JOIN Countries ON Votes.competitor_id = Countries.id WHERE Votes.competitor_id = Countries.id"
+                "SELECT Voters.name, Votes.points " +
+                "FROM Votes " +
+                "JOIN Countries AS Competitors ON Votes.competitor_id = Competitors.id " +
+                "JOIN Countries AS Voters ON Votes.voter_id = Voters.id " +
+                "WHERE Competitors.name = ?;"
             );
+            query.setString(1, country);
 
             ResultSet result = query.executeQuery();
+            ArrayList<Vote> voteList = new ArrayList<>();
+
+            while(result.next()) {
+                voteList.add(new Vote(result.getString("name"), result.getInt("points")));
+            }
 
             try {
                 query.close();
@@ -47,9 +49,9 @@ public class Database {
                 System.err.println("Error while trying to close the query.");
             }
 
-            return result;
+            return new Votes(country, voteList);
         } catch(SQLException exception) {
-            System.err.println("Error while trying to prepare or execute the query.");
+            System.err.println("Error while trying to prepare or execute the query (" + exception.getMessage() + ").");
         }
 
         return null; 

DEV/DEV3.1/TP01/Exercise1/Main.java

@@ -1,26 +1,18 @@
-import java.sql.ResultSet;
-import java.sql.SQLException;
-
 public class Main {
 
     public static void main(String[] args) {
         Database database = new Database();
 
-        String country = "France";
+        Votes votesForItaly = database.getVotesFromCompetitor("Pays-Bas");
-        ResultSet result = database.getVotesFromCompetitor(country);
         
-        try {
+        System.out.println("Vote " + votesForItaly.getCompetitorName() + " :");
-            while(result.next()) {
+        for(Vote vote : votesForItaly.getVoters()) {
-                System.out.println(country + " -> " + result.getString("name") + " : " + result.getInt("points"));
+            System.out.println(vote.getVoterName() + " " + vote.getPoints());
-            }
-        } catch(SQLException exception) {
-            System.err.println("Error while read the data from the result.");
         }
 
-        try {
+        System.out.println("-------------------");
-            result.close();
+        System.out.println("Total " + votesForItaly.getTotalPoints());
-        } catch(SQLException exception) {
+
-            System.err.println("Error while trying to close the result.");
+        database.close();
-        }
     }
 }

DEV/DEV3.1/TP01/Exercise1/Vote.java

@@ -0,0 +1,18 @@
+public class Vote {
+    
+    private String voter; 
+    private int points; 
+
+    public Vote(String voter, int points) {
+        this.voter = voter;
+        this.points = points;
+    }
+
+    public String getVoterName() {
+        return this.voter;
+    }
+
+    public int getPoints() {
+        return this.points;
+    }
+}

DEV/DEV3.1/TP01/Exercise1/Votes.java

@@ -0,0 +1,30 @@
+import java.util.ArrayList;
+
+public class Votes {
+    
+    private String competitor; 
+    private ArrayList<Vote> voters;
+
+    public Votes(String competitor, ArrayList<Vote> voters) {
+        this.competitor = competitor;
+        this.voters = voters; 
+    }
+
+    public String getCompetitorName() {
+        return this.competitor;
+    }
+
+    public ArrayList<Vote> getVoters() {
+        return this.voters;
+    }
+
+    public int getTotalPoints() {
+        int sum = 0;
+
+        for(Vote vote : this.voters) {
+            sum += vote.getPoints();
+        }
+
+        return sum; 
+    }
+}

DEV/DEV3.1/TP01/Exercise1/start.sh

@@ -1,2 +1,3 @@
+rm -rf *.class
 javac Main.java;
-java -cp "/export/documents/mariadb-client.jar" Main;
+java -cp ".:/export/documents/mariadb-client.jar" Main;

DEV/DEV3.1/TP01/Exercise2/Database.java

@@ -0,0 +1,68 @@
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+
+public class Database {
+    
+    private Connection connection; 
+
+    public Database() {
+        try {
+            Class.forName("org.mariadb.jdbc.Driver");
+
+            this.connection = DriverManager.getConnection(
+                "jdbc:mariadb://dwarves.iut-fbleau.fr/baudrier",
+                "baudrier",
+                "baudrier"
+            );
+        } catch(ClassNotFoundException exception) {
+            System.err.println("Class 'org.mariadb.jdbc.Driver' not found.");
+        } catch(SQLException exception) {
+            System.err.println("Error while trying to connect to the database");
+        }
+    }
+
+
+    public Votes getVotesFromCompetitor(String country) {
+        try {
+            PreparedStatement query = this.connection.prepareStatement(
+                "SELECT VoterVotes.points " +
+                "FROM Votes " +
+                "JOIN Countries AS Competitors ON Votes.competitor_id = Competitors.id " +
+                "JOIN Countries AS Voters ON Votes.voter_id = Voters.id " +
+                "WHERE Competitors.name = ?;"
+            );
+            query.setString(1, country);
+
+            ResultSet result = query.executeQuery();
+            ArrayList<Vote> voteList = new ArrayList<>();
+
+            while(result.next()) {
+                voteList.add(new Vote(result.getString("name"), result.getInt("points")));
+            }
+
+            try {
+                query.close();
+            } catch(SQLException exception) {
+                System.err.println("Error while trying to close the query.");
+            }
+
+            return new Votes(country, voteList);
+        } catch(SQLException exception) {
+            System.err.println("Error while trying to prepare or execute the query (" + exception.getMessage() + ").");
+        }
+
+        return null; 
+    }
+
+    public void close() {
+        try {
+            this.connection.close();
+        } catch(SQLException exception) {
+            System.err.println("Error while trying to close the connection.");
+        }
+    }
+}

DEV/DEV3.1/TP01/Exercise2/Main.java

@@ -1,5 +1,3 @@
-package Part2;
-
 public class Main {
     
 }

DEV/DEV3.1/TP01/Exercise2/ScoreBoardWindow.java

@@ -0,0 +1,5 @@
+import javax.swing.JFrame;
+
+public class ScoreBoardWindow extends JFrame {
+    
+}

DEV/DEV3.1/TP02/Exercise1/Part1/ImageWindow.java

@@ -1,87 +0,0 @@
-import java.io.File;
-
-import javax.swing.ImageIcon;
-import javax.swing.JFrame;
-import javax.swing.JLabel;
-
-public class ImageWindow extends JFrame {
-
-    private ImageIcon[] images; 
-    private int cursor;
-
-    private JLabel label; 
-    
-    public ImageWindow() {
-        this.setSize(1024, 1024);
-        this.setLocationRelativeTo(null);
-        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-
-        File resourcesDirectory = new File("../resources/");
-
-        if(resourcesDirectory.exists() && resourcesDirectory.isDirectory()) {
-            File[] files = resourcesDirectory.listFiles();
-
-            if(files != null) {
-                this.images = new ImageIcon[files.length];
-                this.cursor = 0;
-
-                for(File file : files) {
-                    this.images[this.cursor] = new ImageIcon(file.getPath());
-                    this.cursor++;
-                }
-            }
-        }
-
-        this.addMouseListener(new ClickSwapImageEvent(this));
-
-        this.cursor = 0;
-
-        this.nextImage();
-    }
-
-    public void nextImage() {
-        if(this.images.length == 0) return;
-
-        if(this.label != null) {
-            this.remove(this.label);
-        }
-
-        this.label = new JLabel(this.images[cursor]);
-        this.label.setVerticalAlignment(JLabel.CENTER);
-        this.label.setHorizontalAlignment(JLabel.CENTER);
-
-        if(this.cursor + 1 >= this.images.length) {
-            this.cursor = 0;
-        } else {
-            this.cursor++;
-        }
-
-        System.out.println(this.cursor);
-
-        this.add(label);
-        this.revalidate();
-    }
-
-    public void lastImage() {
-        if(this.images.length == 0) return;
-
-        if(this.label != null) {
-            this.remove(this.label);
-        }
-
-        this.label = new JLabel(this.images[cursor]);
-        this.label.setVerticalAlignment(JLabel.CENTER);
-        this.label.setHorizontalAlignment(JLabel.CENTER);
-
-        if(this.cursor - 1 < 0) {
-            this.cursor = this.images.length - 1;
-        } else {
-            this.cursor--;
-        }
-
-        System.out.println(this.cursor);
-
-        this.add(label);
-        this.revalidate();
-    }
-}

DEV/DEV3.1/TP02/Exercise1/Part2/ClickSwapImageEvent.java

@@ -1,5 +0,0 @@
-package Part2;
-
-public class ClickSwapImageEvent {
-    
-}

DEV/DEV3.1/TP02/Exercise1/Part2/ImageWindow.java

@@ -1,26 +0,0 @@
-import java.io.File;
-
-import java.awt.CardLayout;
-
-import javax.swing.ImageIcon;
-import javax.swing.JFrame;
-
-public class ImageWindow extends JFrame {
-
-    private CardLayout card; 
-    
-    public ImageWindow() {
-        this.card = new CardLayout();
-
-        File resourcesDirectory = new File("../resources/");
-
-        if(resourcesDirectory.exists() && resourcesDirectory.isDirectory()) {
-            File[] files = resourcesDirectory.listFiles();
-
-            if(files != null) {
-                for(File file : files) {
-                }
-            }
-        }
-    }
-}

DEV/DEV3.1/TP02/Part1/ClickSwapImageEvent.java

@@ -0,0 +1,23 @@
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+public class ClickSwapImageEvent extends MouseAdapter {
+
+    private ImageWindow window;
+    
+    public ClickSwapImageEvent(ImageWindow window) {
+        this.window = window;
+    }
+
+    public void mouseClicked(MouseEvent event) {
+        System.out.println(this.window.manager.cursor);
+        if(event.getX() > this.window.getWidth() / 2) {
+            this.window.nextImage();
+            System.out.println(this.window.manager.cursor);
+            return; 
+        }
+
+        this.window.previousImage();
+        System.out.println(this.window.manager.cursor);
+    }
+}

DEV/DEV3.1/TP02/Part1/ImageManager.java

@@ -0,0 +1,49 @@
+import java.io.File;
+
+import javax.swing.ImageIcon;
+
+public class ImageManager {
+
+    private ImageIcon[] images; 
+    public int cursor;
+    
+    public ImageManager() {
+        File resourcesDirectory = new File("../resources/");
+
+        if(resourcesDirectory.exists() && resourcesDirectory.isDirectory()) {
+            File[] files = resourcesDirectory.listFiles();
+
+            if(files != null) {
+                this.images = new ImageIcon[files.length];
+                this.cursor = 0;
+
+                for(File file : files) {
+                    this.images[this.cursor] = new ImageIcon(file.getPath());
+                    this.cursor++;
+                }
+
+                this.cursor = 0;
+            }
+        }
+    }
+
+    public ImageIcon getNextImage() {
+        if(this.cursor >= this.images.length - 1) {
+            this.cursor = 0;
+        } else {
+            this.cursor++;
+        }
+
+        return this.images[this.cursor];
+    }
+
+    public ImageIcon getPreviousImage() {
+        if(this.cursor <= 0) {
+            this.cursor = this.images.length - 1;
+        } else {
+            this.cursor--;
+        }
+
+        return this.images[this.cursor];
+    }
+}

DEV/DEV3.1/TP02/Part1/ImageWindow.java

@@ -0,0 +1,46 @@
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+
+public class ImageWindow extends JFrame {
+
+    public ImageManager manager; 
+    private JLabel label; 
+    
+    public ImageWindow() {
+        this.manager = new ImageManager();
+
+        this.setSize(1024, 1024);
+        this.setLocationRelativeTo(null);
+        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+
+        this.addMouseListener(new ClickSwapImageEvent(this));
+
+        this.nextImage();
+    }
+
+    public void nextImage() {
+        if(this.label != null) {
+            this.remove(this.label);
+        }
+
+        this.label = new JLabel(this.manager.getNextImage());
+        this.label.setVerticalAlignment(JLabel.CENTER);
+        this.label.setHorizontalAlignment(JLabel.CENTER);
+
+        this.add(label);
+        this.revalidate();
+    }
+
+    public void previousImage() {
+        if(this.label != null) {
+            this.remove(this.label);
+        }
+
+        this.label = new JLabel(this.manager.getPreviousImage());
+        this.label.setVerticalAlignment(JLabel.CENTER);
+        this.label.setHorizontalAlignment(JLabel.CENTER);
+
+        this.add(label);
+        this.revalidate();
+    }
+}

DEV/DEV3.1/TP02/Part2/ApprovedButtonPressedEvent.java

@@ -0,0 +1,19 @@
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.JDialog;
+
+public class ApprovedButtonPressedEvent implements ActionListener{
+
+    private JDialog dialog;
+
+    public ApprovedButtonPressedEvent(JDialog dialog) {
+        this.dialog = dialog;
+    }
+    
+    @Override
+    public void actionPerformed(ActionEvent event) {
+        this.dialog.dispose();
+        this.dialog.getOwner().dispose();
+    }
+}

DEV/DEV3.1/TP02/Part2/CancelButtonPressedEvent.java

@@ -0,0 +1,18 @@
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.JDialog;
+
+public class CancelButtonPressedEvent implements ActionListener{
+
+    private JDialog dialog;
+
+    public CancelButtonPressedEvent(JDialog dialog) {
+        this.dialog = dialog;
+    }
+    
+    @Override
+    public void actionPerformed(ActionEvent event) {
+        this.dialog.dispose();
+    }
+}

DEV/DEV3.1/TP02/Part2/CloseVerificationWindow.java

@@ -0,0 +1,37 @@
+import java.awt.BorderLayout;
+import java.awt.GridLayout;
+
+import javax.swing.JButton;
+import javax.swing.JDialog;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+public class CloseVerificationWindow extends JDialog {
+    
+    public CloseVerificationWindow(ImageWindow parent) {
+        super(parent, true);
+
+        this.setSize(parent.getWidth() / 3, parent.getHeight() / 3);
+        this.setLocationRelativeTo(parent);
+        this.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
+        this.setLayout(new GridLayout(2, 1));
+
+        JLabel text = new JLabel("Are you sure you want to close the window?");
+        text.setVerticalAlignment(JLabel.CENTER);
+        text.setHorizontalAlignment(JLabel.CENTER);
+        this.add(text);
+
+        JPanel panel = new JPanel();
+        panel.setLayout(new BorderLayout());
+        
+        JButton approveButton = new JButton("Yes");
+        approveButton.addActionListener(new ApprovedButtonPressedEvent(this));
+        panel.add(approveButton, BorderLayout.WEST);
+
+        JButton cancelButton = new JButton("No");
+        cancelButton.addActionListener(new CancelButtonPressedEvent(this));
+        panel.add(cancelButton, BorderLayout.EAST);
+
+        this.add(panel);
+    }
+}

DEV/DEV3.1/TP02/Part2/ImageWindow.java

@@ -0,0 +1,55 @@
+import java.io.File;
+
+import java.awt.CardLayout;
+
+import javax.swing.ImageIcon;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+public class ImageWindow extends JFrame {
+
+    private CardLayout cards; 
+    private JPanel imagePanel; 
+    
+    public ImageWindow() {
+        this.setSize(1024, 1024);
+        this.setLocationRelativeTo(null);
+        this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
+
+        File resourcesDirectory = new File("../resources/");
+
+        if(resourcesDirectory.exists() && resourcesDirectory.isDirectory()) {
+            File[] files = resourcesDirectory.listFiles();
+
+            if(files != null) {
+
+                this.cards = new CardLayout(); 
+                this.imagePanel = new JPanel();
+                this.imagePanel.setLayout(this.cards);
+
+                for(File file : files) {
+                    JLabel label = new JLabel(new ImageIcon(file.getPath()));
+                    label.setHorizontalAlignment(JLabel.CENTER);
+                    label.setVerticalAlignment(JLabel.CENTER);
+                    this.imagePanel.add(new JLabel(new ImageIcon(file.getPath())), file.getName());
+                }
+
+                this.add(this.imagePanel);
+
+                this.addMouseListener(new ClickSwapImageEvent(this));
+                this.addWindowListener(new WindowClosedEvent(this));
+
+                this.nextImage();
+            }
+        }
+    }
+
+    public void nextImage() {
+        this.cards.next(this.imagePanel);
+    }
+
+    public void lastImage() {
+        this.cards.previous(this.imagePanel);
+    }
+}

DEV/DEV3.1/TP02/Part2/Main.java

@@ -0,0 +1,6 @@
+public class Main {
+    public static void main(String[] args) {
+        ImageWindow window = new ImageWindow();
+        window.setVisible(true);
+    }
+}

DEV/DEV3.1/TP02/Part2/WindowClosedEvent.java

@@ -0,0 +1,16 @@
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
+public class WindowClosedEvent extends WindowAdapter {
+
+    private ImageWindow window;
+
+    public WindowClosedEvent(ImageWindow window) {
+        this.window = window;
+    }
+    
+    @Override
+    public void windowClosing(WindowEvent event) {
+        (new CloseVerificationWindow(this.window)).setVisible(true);
+    }
+}

DEV/DEV3.1/TP02/Part2/start.sh

@@ -0,0 +1,3 @@
+rm -rf *.class
+javac Main.java
+java Main

DEV/DEV3.1/TP03/Exercise1/GridWindow.java

@@ -0,0 +1,86 @@
+import java.awt.Dimension;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+
+public class GridWindow extends JFrame {
+    
+    public GridWindow() {
+        this.setSize(200, 200);
+        this.setLocationRelativeTo(null);
+        this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
+
+        this.getContentPane().setLayout(new GridBagLayout());
+
+        this.placeButtons();
+
+        this.addWindowListener(new GridWindowClosedEvent(this));
+    }
+
+    private void placeButtons() {
+        GridBagConstraints constraints = new GridBagConstraints();
+
+        JButton one = new JButton("1");
+        constraints.gridx = 0; 
+        constraints.gridy = 0;
+        constraints.gridwidth = 2; 
+        constraints.gridheight = 1;
+        constraints.fill = GridBagConstraints.BOTH;
+        constraints.insets = new Insets(0, 0, 0, 0);
+        constraints.weightx = 1.0;
+        constraints.weighty = 1.0;
+
+        this.getContentPane().add(one, constraints);
+
+        JButton two = new JButton("2");
+        constraints.gridx = 2; 
+        constraints.gridy = 0;
+        constraints.gridwidth = 1; 
+        constraints.gridheight = 2;
+        constraints.fill = GridBagConstraints.BOTH;
+        constraints.insets = new Insets(0, 0, 0, 0);
+        constraints.weightx = 1.0;
+        constraints.weighty = 1.0;
+
+        this.getContentPane().add(two, constraints);
+
+        JButton three = new JButton("3");
+        constraints.gridx = 1; 
+        constraints.gridy = 2;
+        constraints.gridwidth = 2; 
+        constraints.gridheight = 1;
+        constraints.fill = GridBagConstraints.BOTH;
+        constraints.insets = new Insets(0, 0, 0, 0);
+        constraints.weightx = 1.0;
+        constraints.weighty = 1.0;
+
+        this.getContentPane().add(three, constraints);
+
+        JButton four = new JButton("4");
+        constraints.gridx = 0; 
+        constraints.gridy = 1;
+        constraints.gridwidth = 1; 
+        constraints.gridheight = 2;
+        constraints.fill = GridBagConstraints.BOTH;
+        constraints.insets = new Insets(0, 0, 0, 0);
+        constraints.weightx = 1.0;
+        constraints.weighty = 1.0;
+
+        this.getContentPane().add(four, constraints);
+
+        JButton five = new JButton("5");
+        constraints.gridx = 1; 
+        constraints.gridy = 1;
+        constraints.gridwidth = 1; 
+        constraints.gridheight = 1;
+        constraints.fill = GridBagConstraints.NONE;
+        constraints.insets = new Insets(0, 0, 0, 0);
+        constraints.weightx = 0.0;
+        constraints.weighty = 0.0;
+
+        this.getContentPane().add(five, constraints);
+    }
+}

DEV/DEV3.1/TP03/Exercise1/GridWindowClosedEvent.java

@@ -0,0 +1,19 @@
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
+import javax.swing.JOptionPane;
+
+public class GridWindowClosedEvent extends WindowAdapter {
+
+    private GridWindow window;
+
+    public GridWindowClosedEvent(GridWindow window) {
+        this.window = window;
+    }
+    
+    @Override
+    public void windowClosing(WindowEvent event) {
+        int result = JOptionPane.showConfirmDialog(this.window, "Are you sure you want to close this window?", "Close current window", JOptionPane.YES_NO_OPTION);
+        if(result == JOptionPane.YES_OPTION) this.window.dispose();
+    }
+}

DEV/DEV3.1/TP03/Exercise1/Main.java

@@ -0,0 +1,7 @@
+public class Main {
+
+    public static void main(String[] args) {
+        GridWindow window = new GridWindow();
+        window.setVisible(true);
+    }
+}

DEV/DEV3.1/TP03/Exercise2/Champ.java

@@ -0,0 +1,18 @@
+public class Champ {
+    
+    private String code; 
+    private String[] modules; 
+
+    public Champ(String code, String[] modules) {
+        this.code = code; 
+        this.modules = modules;
+    }
+
+    public String getCode() {
+        return this.code;
+    }
+
+    public String[] getModules() {
+        return this.modules;
+    }
+}

DEV/DEV3.1/TP03/Exercise2/Database.java

@@ -0,0 +1,44 @@
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+
+public class Database {
+    
+    private Connection connection; 
+
+    public Database() {
+        try {
+            Class.forName("org.mariadb.jdbc.Driver");
+
+            this.connection = DriverManager.getConnection(
+                "jdbc:mariadb://dwarves.iut-fbleau.fr/baudrier",
+                "baudrier",
+                "baudrier"
+            );
+        } catch(ClassNotFoundException exception) {
+            System.err.println("Class 'org.mariadb.jdbc.Driver' not found.");
+        } catch(SQLException exception) {
+            System.err.println("Error while trying to connect to the database");
+        }
+    }
+
+    public Champ[] getAllData() {
+        PreparedStatement query = this.connection.prepareStatement("SELECT id, code FROM Champ");
+        ResultSet result = query.executeQuery();
+
+        while(result.next()) {
+            query = this.connection.prepareStatement("SELECT code FROM Modules WHERE champId = " + result.getInt("id"));
+        }
+    } 
+
+    public void close() {
+        try {
+            this.connection.close();
+        } catch(SQLException exception) {
+            System.err.println("Error while trying to close the connection.");
+        }
+    }
+}

DEV/DEV3.1/TP03/Exercise2/Main.java

@@ -0,0 +1 @@
+

DEV/DEV3.1/TP03/Exercise2/schema.sql

@@ -0,0 +1,21 @@
+CREATE TABLE Champ (
+    id INT PRIMARY KEY AUTO_INCREMENT,
+    code VARCHAR(20)
+);
+
+CREATE TABLE Module (
+    id INT PRIMARY KEY AUTO_INCREMENT,
+    champId INT REFERENCES Champ(id),
+    code VARCHAR(20)
+);
+
+INSERT INTO Champ(code) VALUES ("APL");
+INSERT INTO Champ(code) VALUES ("WIM");
+
+INSERT INTO Module(champId, code) VALUES (1, "M1102");
+INSERT INTO Module(champId, code) VALUES (1, "M1103");
+INSERT INTO Module(champId, code) VALUES (1, "M3103");
+INSERT INTO Module(champId, code) VALUES (2, "M1105");
+INSERT INTO Module(champId, code) VALUES (2, "M3104");
+INSERT INTO Module(champId, code) VALUES (2, "M4103C");
+INSERT INTO Module(champId, code) VALUES (2, "M4104C");

SCR/SCR3.1/TP02/Exercise1/answer.txt

@@ -0,0 +1,11 @@
+Explications techniques
+
+    Fonctions standards (fopen, fread, fwrite) :
+        Ces fonctions utilisent une mémoire tampon (buffer) en interne. Même si tu demandes de lire/écrire un octet à la fois, 
+        la bibliothèque C va lire ou écrire plusieurs octets (souvent 4096, la taille d’un bloc) d’un coup en interne, 
+        ce qui réduit le nombre d’appels système réels et accélère le programme.
+        Vérifie avec strace : un seul appel read ou write pour plusieurs appels fread/fwrite d’un octet !
+
+    Appels systèmes (open, read, write, close) :
+        Ici, chaque appel à read() ou write() provoque un appel système pour chaque octet. 
+        Le passage du mode utilisateur au noyau (syscall) est coûteux, donc le programme est beaucoup plus lent.

SCR/SCR3.1/TP03/Exercise1/answer.txt

@@ -0,0 +1,10 @@
+  PID    PPID COMMAND         S
+   4331    1423 bash            S
+   4732    4331  \_ a.out       S
+   4733    4732      \_ a.out   S
+   4736    4733      |   \_ a.o S
+   4737    4733      |   \_ a.o S
+   4734    4732      \_ a.out   S
+   4735    4732      \_ a.out   S
+
+-> Il y aura donc 6 appels à a.out.

SCR/SCR3.1/TP03/Exercise1/main.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+# include <sys/types.h>
+# include <unistd.h>
+
+int main() {
+	fork();
+
+	if (fork()){
+		fork();
+	}
+
+	printf("A\n");
+
+    sleep(20);
+}

SCR/SCR3.1/TP03/Exercise2/answer.txt

@@ -0,0 +1,6 @@
+[baudrier@salle229-06 Exercise2]$ gcc ex1-stdio.c 
+[baudrier@salle229-06 Exercise2]$ ./a.out
+NONOUI
+NON[baudrier@salle229-06 Exercise2]$ gcc ex1-syscall.c 
+[baudrier@salle229-06 Exercise2]$ ./a.out
+NONOUI

SCR/SCR3.1/TP03/Exercise2/ex1-stdio.c

@@ -0,0 +1,12 @@
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+
+
+int main(){
+
+	printf("NON");
+	if (fork()) {
+		printf("OUI\n");
+	}
+}

SCR/SCR3.1/TP03/Exercise2/ex1-syscall.c

@@ -0,0 +1,14 @@
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+
+
+int main(){
+
+	//printf("NON");
+	write(STDOUT_FILENO,"NON",3);
+	if (fork()) {
+		//printf("OUI\n");
+	write(STDOUT_FILENO,"OUI\n",4);
+	}
+}

SCR/SCR3.1/TP03/Exercise3/answer.txt

@@ -0,0 +1,15 @@
+-> Le code de cet exercice permet de copier le contenu d'un fichier dans un autre fichier.
+
+-> Quand on décommente le fork(), il y a des entrelacements possibles duent à l'exécution simultanée des processus.
+
+Lecture Père = LP
+Ecriture Père = EP
+
+Lecture Fils = LF
+Ecriture Fils = EF
+
+Il y a plusieurs combinaisons possibles qui peuvent arriver : 
+
+- LP (a) -> LF (b) -> EF (b) -> EP (a)
+- LP (a) -> EP (a) -> LF (b) -> EF (b)
+- etc...

SCR/SCR3.1/TP03/Exercise3/copy1byte.c

@@ -0,0 +1,45 @@
+#include <sys/types.h>
+#include <unistd.h>
+#include<stdio.h>
+#include <stdlib.h>
+#include<assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+
+#define msg1 "je suis le pere"
+#define msg2 "je suis le fils !!!"
+
+int main(int argc,char * argv[]){
+
+	int infd,outfd;
+	ssize_t nbread;
+	char buf[1];
+	pid_t p;
+
+	if (argc != 3){
+
+		printf("%s infile outfile\n",argv[0]);
+		exit(1);
+	}
+
+	infd = open(argv[1],O_RDONLY);
+	assert(infd >= 0);
+	outfd = open(argv[2],O_WRONLY|O_CREAT|O_TRUNC,0644);
+	assert(outfd >= 0);
+
+	p=fork(); // <- decommentez cette ligne
+
+	while(1){
+	
+	nbread=read(infd,buf,sizeof(buf));
+	if (nbread <=0 ) break;
+	write(outfd,buf,sizeof(buf));
+
+	}
+
+
+	close(infd);
+	close(outfd);
+}

SCR/SCR3.1/TP03/Exercise3/test

@@ -0,0 +1 @@
+je m'appelle nathan

SCR/SCR3.1/TP03/Exercise3/testdetest

@@ -0,0 +1 @@
+je map'pelle nathan

SCR/SCR3.1/TP03/Exercise4/rebours.c

@@ -0,0 +1,12 @@
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(int argc, char* argv[]) {
+	assert(argc == 2);
+
+    long i = strtol(argv[1], NULL, 10);
+
+	return EXIT_SUCCESS;
+}