created Class TournamentDecorator.java

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/FXController.java

@@ -4,21 +4,34 @@ import javafx.scene.layout.Pane;
 
 public abstract class FXController {
     Tournament tournament;
+    TournamentDecorator tournamentDecorator;
     Factory factory;
     FileIO fileIO;
     Pane pane;
 
     public void setup(Tournament tournament, FileIO fileIO, Factory factory, Pane pane){
-        this.tournament = tournament;
+        setTournament(tournament);
         this.fileIO = fileIO;
         this.factory = factory;
         this.pane = pane;
+        tournamentDecorator = new TournamentDecorator(fileIO, tournament);
+        tournamentDecorator.addListener(new IsObserver() {
+            @Override
+            public void update() {
+                loadContent();
+            }
+        });
     }
 
     public abstract void loadContent();
 
-    protected Tournament getTournament() {
+    public void setTournament(Tournament tournament) {
-        return tournament;
+        this.tournament = tournament;
+        tournamentDecorator.setTournament(tournament);
+    }
+
+    protected TournamentDecorator getTournamentDecorator() {
+        return tournamentDecorator;
     }
 
     protected FileIO getFileIO() {

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/IsObservable.java

@@ -0,0 +1,19 @@
+package ch.zhaw.projekt2.turnierverwaltung;
+
+/**
+ * Most basic interface for observing an object
+ * @author bles
+ *
+ */
+public interface IsObservable {
+    /**
+     * Add an observer that listens for updates
+     * @param observer
+     */
+    void addListener(IsObserver observer);
+    /**
+     * Remove an observer from the list
+     * @param observer
+     */
+    void removeListener(IsObserver observer);
+}

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/IsObserver.java

@@ -0,0 +1,14 @@
+package ch.zhaw.projekt2.turnierverwaltung;
+
+/**
+ * Most basic interface for beeing an observer
+ * @author bles
+ *
+ */
+public interface IsObserver {
+    /**
+     * This method is always called when an observed object
+     * changes
+     */
+    void update();
+}

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/TournamentDecorator.java

@@ -0,0 +1,59 @@
+package ch.zhaw.projekt2.turnierverwaltung;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class TournamentDecorator implements IsObservable{
+    private Tournament tournament;
+    private FileIO fileIO;
+    private List<IsObserver> listener = new ArrayList<>();
+
+    public TournamentDecorator(FileIO fileIO, Tournament tournament){
+        setTournament(tournament);
+        setFileIO(fileIO);
+    }
+
+    public void setFileIO(FileIO fileIO) {
+        this.fileIO = fileIO;
+    }
+
+    public void setTournament(Tournament tournament) {
+        this.tournament = tournament;
+    }
+
+    @Override
+    public void addListener(IsObserver observer) {
+        listener.add(observer);
+    }
+
+    @Override
+    public void removeListener(IsObserver observer) {
+        listener.remove(observer);
+    }
+
+    public void createTournament(String name, Tournament.Type type){
+        if(fileIO.tournamentExists(name)){
+            System.out.println("Tournament with same name exists already.");
+            return; //TODO handle and logging
+        }
+        try {
+            Tournament tournament = new Tournament(name, type);
+            fileIO.saveTournament(tournament);
+            informListener();
+        } catch (Tournament.InvalidNameException e) {
+            e.printStackTrace(); //TODO handle and logging
+        } catch (Tournament.InvalidTypeException e) {
+            e.printStackTrace(); //TODO handle and logging
+        } catch (IOException e) {
+            e.printStackTrace(); //TODO handle and logging
+        }
+    }
+
+
+    public void informListener() {
+        for(IsObserver observer : listener) {
+            observer.update();
+        }
+    }
+}

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/main/tournamentList/TournamentListController.java

@@ -56,29 +56,13 @@ public class TournamentListController extends FXController {
 
     @FXML
     void createTournament(ActionEvent event) {
-        if(getFileIO().tournamentExists(tournamentNameField.getText())){
+        getTournamentDecorator().createTournament(tournamentNameField.getText(), modusChoiceBox.getValue());
-            System.out.println("Tournament with same name exists already.");
-            return; //TODO handle and logging
-        }
-        try {
-            Tournament tournament = new Tournament(tournamentNameField.getText(), modusChoiceBox.getValue());
-            getFileIO().saveTournament(tournament);
-            loadContent();
-            tournamentNameField.clear();
-        } catch (Tournament.InvalidNameException e) {
-            e.printStackTrace(); //TODO handle and logging
-        } catch (Tournament.InvalidTypeException e) {
-            e.printStackTrace(); //TODO handle and logging
-        } catch (IOException e) {
-            e.printStackTrace(); //TODO handle and logging
-        }
-
     }
 
     @FXML
     void openTournament(ActionEvent event) {
-        try {
         File tournamentFile = tournamentListView.getSelectionModel().getSelectedItems().get(0);
+        try {
             getFactory().setTournament(getFileIO().loadTournament(tournamentFile));
             getFactory().loadParticipantFormular((BorderPane) getPane()); //TODO load TournamentView instead of ParticipantFormular?
         } catch (IOException e) {
@@ -105,6 +89,7 @@ public class TournamentListController extends FXController {
     @Override
     public void loadContent() {
         tournamentListView.setItems(getFileIO().getList());
+        tournamentNameField.clear();
     }
 }