Homework 01.12.21

NoteBook/src/info/istamendil/notebook/App.java

@@ -15,72 +15,71 @@
  *
  * Note Book. UserInteractor and DB modules.
  * @author Alexander Ferenets (Istamendil) <ist.kazan@gmail.com>
- * 
+ *
  * Code for studying purposes. Programming course. Kazan Federal University, ITIS.
  * http://study.istamendil.info/
  */
 public class App extends Application{
-
-  private static final String DB = "/tmp/db.txt";
-  private static final String PUNCH_CARD = "/tmp/card.txt";
-
-  protected UserInteractor terminal;
-  protected Db db;
 
-  /**
-   * @param args the command line arguments
-   */
-  public static void main(String[] args) {
-    App app = new App(args);
-  }
+    private static final String DB = "C:\\Users\\ICL\\Desktop\\data\\db.txt";
+    private static final String PUNCH_CARD = "C:\\Users\\ICL\\Desktop\\data\\card.txt";
+
+    protected UserInteractor terminal;
+    protected Db db;
 
-  public App(String[] args) {
-    super(args);
-  }
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String[] args) {
+        App app = new App(args);
+    }
 
-  @Override
-  public void init() {
-    try {
-      this.terminal = new PunchedCardUserInteractor(Paths.get(App.PUNCH_CARD));
-      this.db = new FileDb(App.DB);
-    } catch (UserInteractorException ex) {
-      System.out.println("Couldn't start application due error:");
-      System.err.println(ex.getMessage());
-      System.exit(1);
+    public App(String[] args) {
+        super(args);
     }
-  }
 
-  @Override
-  public void start() {
-    try {
-      String command;
-      while((command = this.terminal.readCommand()) != null){
-        switch(command){
-          case "readAll":
-            this.terminal.print(Arrays.toString(this.db.findAll()));
-            break;
-          case "save":
-            if((command = this.terminal.readCommand()) != null){
-              this.db.save(command);
+    @Override
+    public void init() {
+        try {
+            this.terminal = new PunchedCardUserInteractor();
+            this.db = new FileDb(App.DB);
+        } catch (UserInteractorException ex) {
+            System.out.println("Couldn't start application due error:");
+            System.err.println(ex.getMessage());
+            System.exit(1);
+        }
+    }
+
+    @Override
+    public void start() {
+        try {
+            String command;
+            while((command = this.terminal.readCommand()) != null){
+                switch(command){
+                    case "readAll":
+                        this.terminal.print(Arrays.toString(this.db.findAll()));
+                        break;
+                    case "save":
+                        if((command = this.terminal.readCommand()) != null){
+                            this.db.save(command);
+                        }
+                        break;
+                    default:
+                        this.terminal.print("Unknown command");
+                }
             }
-            break;
-          default:
-            this.terminal.print("Unkown command");
+        } catch (UserInteractorReadException ex) {
+            System.out.println("Can't read user input due error:");
+            System.err.println(ex.getMessage());
+            System.exit(1);
+        } catch (UserInteractorWriteException ex) {
+            System.out.println("Can't print data to user due error:");
+            System.err.println(ex.getMessage());
+            System.exit(1);
+        } catch (DbException ex) {
+            System.err.println(ex.getMessage());
+            System.exit(1);
         }
-//        this.terminal.print(command);
-      }
-    } catch (UserInteractorReadException ex) {
-      System.out.println("Can't read user input due error:");
-      System.err.println(ex.getMessage());
-      System.exit(1);
-    } catch (UserInteractorWriteException ex) {
-      System.out.println("Can't print data to user due error:");
-      System.err.println(ex.getMessage());
-      System.exit(1);
-    } catch (DbException ex) {
-      System.err.println(ex.getMessage());
-      System.exit(1);
     }
-  }
-
+
 }

NoteBook/src/info/istamendil/notebook/data/FileDb.java

@@ -11,6 +11,7 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Arrays;
 
 /**
  *
@@ -23,27 +24,38 @@
 public class FileDb implements Db {
 
     protected final String path;
+    private Object[] dataDb;
 
     public FileDb(String path) {
+        this.dataDb = new Object[0];
         this.path = path;
     }
 
     @Override
     public void save(Object obj) throws DbException {
         Object[] data = this.findAll();
-        try (FileOutputStream stream = new FileOutputStream(this.path)) {
+        Object[] newData = new Object[data.length + 1];
+        System.arraycopy(data, 0, newData, 0, data.length);
+        newData[newData.length - 1] = obj;
+        this.dataDb = newData;
+        /*try (FileOutputStream stream = new FileOutputStream(this.path)) {
             Object[] newData = new Object[data.length + 1];
             System.arraycopy(data, 0, newData, 0, data.length);
             newData[newData.length - 1] = obj;
             stream.write(this.convertToBytes(newData));
         } catch (IOException ex) {
             throw new DbException("DB error: " + ex.getMessage());
-        }
+        }*/
     }
-
+    
     @Override
     public Object[] findAll() throws DbException {
-        try {
+        if(this.dataDb.length > 0){
+            return this.dataDb;
+        }else{
+            return new Object[0];
+        }
+        /*try {
             Path path = Paths.get(this.path);
             byte[] data = Files.readAllBytes(path);
             if (data.length > 0) {
@@ -56,7 +68,7 @@ public Object[] findAll() throws DbException {
             throw new DbException("DB error: " + ex.getMessage());
         } catch (ClassNotFoundException ex) {
             throw new DbException("DB error: " + ex.getMessage());
-        }
+        }*/
     }
 
     private byte[] convertToBytes(Object object) throws IOException {

NoteBook/src/info/istamendil/notebook/utils/PunchedCardUserInteractor.java

@@ -3,7 +3,10 @@
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
+import java.util.Scanner;
 
 /**
  *
@@ -15,33 +18,40 @@
  */
 public class PunchedCardUserInteractor implements UserInteractor {
 
-  protected final String[] lines;
-  protected int currentLine = 0;
+    protected final String[] lines;
+    protected int currentLine = 0;
 
-  public PunchedCardUserInteractor(Path path) throws UserInteractorException {
-    try {
-      List<String> lines = Files.readAllLines(path);
-      this.lines = lines.toArray(new String[lines.size()]);
-      this.currentLine = 0;
-    } catch (IOException ex) {
-      throw new UserInteractorException("Can't load punched card.");
+    public PunchedCardUserInteractor() throws UserInteractorException {
+        List<String> lines = new ArrayList<>();
+
+        while(true){
+            UserReadCommandInteractor receiver = new UserReadCommandInteractor();
+            String command = receiver.readCommand();
+            if(command.equals("exit")) {
+                break;
+            } else {
+                lines.add(command);
+            }
+        }
+
+        this.lines = lines.toArray(new String[lines.size()]);
+        this.currentLine = 0;
     }
-  }
-
-  @Override
-  public String readCommand() throws UserInteractorReadException {
-    String command = null;
-    if(this.currentLine < this.lines.length){
-      command = this.lines[this.currentLine];
-      this.currentLine++;
-      System.out.println("<< " + command);
+
+    @Override
+    public String readCommand() throws UserInteractorReadException {
+        String command = null;
+        if(this.currentLine < this.lines.length){
+            command = this.lines[this.currentLine];
+            this.currentLine++;
+            System.out.println("<< " + command);
+        }
+        return command;
     }
-    return command;
-  }
 
-  @Override
-  public void print(String output) throws UserInteractorWriteException {
-    System.out.println(">> " + output);
-  }
+    @Override
+    public void print(String output) throws UserInteractorWriteException {
+        System.out.println(">> " + output);
+    }
 
 }

NoteBook/src/info/istamendil/notebook/utils/UserReadCommandInteractor.java

@@ -0,0 +1,18 @@
+package info.istamendil.notebook.utils;
+import java.util.Scanner;
+
+public class UserReadCommandInteractor implements UserInteractor {
+
+    @Override
+    public String readCommand() throws UserInteractorReadException {
+        Scanner sc = new Scanner(System.in);
+        System.out.println("Input next command: ");
+        String command = sc.nextLine();
+        return command;
+    }
+
+    @Override
+    public void print(String output) throws UserInteractorWriteException {
+        System.out.println(">> " + output);
+    }
+}