add a model to manage data

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

@@ -28,10 +28,13 @@ public class Database {
     public Votes getVotesFromCompetitor(String country) {
         try {
             PreparedStatement query = this.connection.prepareStatement(
-                "SELECT Countries.name Votes.points" + 
-                "FROM Votes JOIN Countries ON Votes.competitor_id = Countries.id" + 
-                "WHERE Countries.name = " + country
+                "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<>();
@@ -48,7 +51,7 @@ public class Database {
 
             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

@@ -3,7 +3,7 @@ public class Main {
     public static void main(String[] args) {
         Database database = new Database();
 
-        Votes votesForItaly = database.getVotesFromCompetitor("Italie");
+        Votes votesForItaly = database.getVotesFromCompetitor("Pays-Bas");
         
         System.out.println("Vote " + votesForItaly.getCompetitorName() + " :");
         for(Vote vote : votesForItaly.getVoters()) {
@@ -12,5 +12,7 @@ public class Main {
 
         System.out.println("-------------------");
         System.out.println("Total " + votesForItaly.getTotalPoints());
+
+        database.close();
     }
 }

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;