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

@@ -0,0 +1,113 @@
+package ch.zhaw.projekt2.turnierverwaltung;
+
+
+import java.io.*;
+import java.util.Arrays;
+import java.util.List;
+import java.util.logging.Logger;
+
+
+public class FileIO {
+    private File mainDir;
+    private File saves;
+
+    private static final Logger logger = Logger.getLogger(FileIO.class.getName());
+
+
+    public FileIO(String saveLocation) {
+        this.mainDir = new File(saveLocation);
+        if (!mainDir.exists()) {
+            logger.fine("Creating main directory in given path" + saveLocation);
+            mainDir.mkdir();
+        } else {
+            logger.finer("main directory already exists");
+        }
+
+        saves = new File(mainDir, "saves");
+        if (!saves.exists()) {
+            saves.mkdir();
+            logger.fine("Creating save directory");
+        } else {
+            logger.finer("save directory already exists");
+        }
+    }
+
+    public List<File> getList() {
+        logger.fine("Creating a List out of all Files in the save directory and returning it");
+        return Arrays.asList(saves.listFiles());
+    }
+
+    /**
+     * @param tournamentFile
+     * @return
+     * @throws ClassNotFoundException
+     * @throws IOException            File not found or not readable.
+     */
+    public Tournament loadTournament(File tournamentFile) throws IOException, ClassNotFoundException {
+        if (tournamentFile == null) {
+            logger.warning("Given tournament file is empty");
+            throw new IllegalArgumentException("Tournament File is null");
+        }
+        Tournament tournament;
+        logger.finer("Starting up Input Stream to read File");
+        ObjectInputStream in = null;
+        try {
+            logger.fine("Setting up input file and reading it");
+            FileInputStream fileInputStream = new FileInputStream(tournamentFile);
+            in = new ObjectInputStream(fileInputStream);
+            logger.finer("Starting to read tournament File");
+            tournament = (Tournament) in.readObject();
+        } catch (FileNotFoundException e) {
+            logger.severe("Could not find tournament File");
+            throw e;
+        } catch (IOException e) {
+            logger.severe("Failed to read File" + tournamentFile.getName());
+            throw new IOException("Error while reading File",e);
+        } catch (ClassNotFoundException e) {
+            logger.severe("No definition for the class with the specified name could be found");
+            throw new ClassNotFoundException("No definition for the class with the specified name could be found",e);
+        } finally {
+            if (in != null) {
+                try {
+                    logger.finer("Trying to close input stream");
+                    in.close();
+                } catch (IOException e) {
+                    logger.severe("Failed to close input stream");
+                    throw new IOException("Error while closing input stream",e);
+                }
+            }
+        }
+        return tournament;
+    }
+
+    public void saveTournament(Tournament tournament) {
+        if (tournament == null) {
+            logger.warning("Given tournament file is empty");
+            throw new IllegalArgumentException("Null tournament received");
+        }
+        File newSave = new File(saves, tournament.getName() + ".txt");
+        ObjectOutputStream out = null;
+
+        try {
+            newSave.createNewFile();
+            out = new ObjectOutputStream(new FileOutputStream(newSave));
+            out.writeObject(tournament);
+            System.out.println("Save File" + tournament.getName() + ".txt being saved to " + saves.getAbsolutePath());
+
+        } catch (FileNotFoundException e) {
+            throw new RuntimeException(e);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        } finally {
+            if (out != null) {
+                try {
+                    out.close();
+                } catch (IOException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+
+        }
+
+    }
+}

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

@@ -1,6 +1,8 @@
 package ch.zhaw.projekt2.turnierverwaltung;
 
-public class Tournament {
+import java.io.Serializable;
+
+public class Tournament implements Serializable {
     private String name;
 
     public Tournament(String name){

app/src/test/java/ch/zhaw/projekt2/turnierverwaltung/FileIOTest.java

@@ -0,0 +1,127 @@
+package ch.zhaw.projekt2.turnierverwaltung;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Comparator;
+import java.util.List;
+import java.util.logging.Logger;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class FileIOTest {
+
+    String RESOURCES_DIR = "./src/test/resources/ch/zhaw/projekt2/turnierverwaltung/";
+    String mainDir;
+    String saveDir;
+    FileIO io;
+
+    @Test
+    void FileIONewDir() throws IOException {
+        mainDir = RESOURCES_DIR + "FileIONew";
+        saveDir = mainDir + "/saves";
+        File mainDirFile = new File(mainDir);
+        File saveDirFile = new File(mainDir);
+        try{
+            Files.walk(mainDirFile.toPath())
+                    .sorted(Comparator.reverseOrder())
+                    .map(Path::toFile)
+                    .forEach(File::delete);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        assertFalse(mainDirFile.exists());
+        assertFalse(saveDirFile.exists());
+        io = new FileIO(mainDir);
+        assertTrue(mainDirFile.exists());
+        assertTrue(saveDirFile.exists());
+        Files.walk(mainDirFile.toPath())
+                .sorted(Comparator.reverseOrder())
+                .map(Path::toFile)
+                .forEach(File::delete);
+        assertFalse(mainDirFile.exists());
+        assertFalse(saveDirFile.exists());
+    }
+
+    @Nested
+    class Read{
+        @BeforeEach
+        void init() {
+            mainDir = RESOURCES_DIR + "FileIORead";
+            io = new FileIO(mainDir);
+        }
+
+        @Test
+        void getList() {
+            List<File> tournaments = io.getList();
+            assertEquals("empty.txt", tournaments.get(0).getName());
+            assertEquals("test1.txt", tournaments.get(1).getName());
+        }
+
+        @Test
+        void getListEmpty() {
+            mainDir = RESOURCES_DIR + "FileIOEmpty";
+            io = new FileIO(mainDir);
+            assertEquals(0, io.getList().size());
+        }
+
+        @Test
+        void loadTournament() throws IOException, ClassNotFoundException {
+            mainDir = RESOURCES_DIR + "FileIORead";
+            io = new FileIO(mainDir);
+            Tournament tournament = io.loadTournament(new File(mainDir + "/saves/test1.txt"));
+            assertEquals("test1", tournament.getName());
+        }
+
+        @Test
+        void loadTournamentNotExisting(){
+            io = new FileIO(mainDir);
+            assertThrows(FileNotFoundException.class, () -> io.loadTournament(new File("Not-existing-File")));
+        }
+
+        @Test
+        void loadTournamentEmpty(){
+            io = new FileIO(mainDir);
+            assertThrows(IOException.class, () -> io.loadTournament(new File(mainDir + "/saves/empty.txt")));
+        }
+
+        @Test
+        void loadTournamentFileNull(){
+            io = new FileIO(mainDir);
+            assertThrows(IllegalArgumentException.class, () -> io.loadTournament(null));
+        }
+    }
+
+    @Nested
+    class Save{
+        @BeforeEach
+        void setup(){
+            mainDir = RESOURCES_DIR + "FileIOSave";
+            io = new FileIO(mainDir);
+        }
+
+        @Test
+        void saveTournament() throws IOException {
+            Tournament tournament = new Tournament("test1");
+            io.saveTournament(tournament);
+            File file = new File(mainDir + "/saves/test1.txt");
+            if(file.exists()){
+                file.delete();
+            } else {
+                fail();
+            }
+        }
+
+        @Test
+        void saveTournamentNull(){
+            assertThrows(IllegalArgumentException.class, () -> io.saveTournament(null));
+        }
+    }
+}