Merge branch 'MrShoco-master'

.gitignore

@@ -17,6 +17,8 @@ jars
 
 .classpath
 .project
+workbench.xmi
+*.swp
 
 .settings
 .checkstyle

src/ru/fizteh/fivt/students/mrshoco/filemap/FileMap.java

@@ -0,0 +1,57 @@
+import util.*;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Scanner;
+
+public final class FileMap {
+
+    public static void main(final String[] args) {
+        File fl = new File("db.dat"/*System.getProperty("db.file")*/);
+        HashMap<String, String> hm;
+        try {
+            hm = Data.load(fl);
+        } catch (FileNotFoundException e) {
+            System.out.println("File not found");
+            return;
+        } catch (IOException e) {
+            System.out.println("Error while reading file");
+            return;
+        }
+        Launcher lnch = new Launcher(hm);
+        if (args.length != 0) {
+            try {
+                lnch.run(args);
+            } catch (Exception e) {
+                System.out.println(e.getMessage());
+            }
+        } else {
+            Scanner sc = new Scanner(System.in);
+            while (true) {
+                try {
+                        System.out.print("$ ");
+                        String input = sc.nextLine().trim();
+                        lnch.run(input.split(" "));
+                } catch (IndexOutOfBoundsException e) {
+                    System.out.println(e.getMessage());
+                } catch (Exception e) {
+                    sc.close();
+                    System.out.println(e.getMessage());
+                    break;
+                }
+            }
+        }
+
+        try {
+            Data.save(fl, hm);
+        } catch (FileNotFoundException e) {
+            System.out.println("File not found");
+            return;
+        } catch (IOException e) {
+            System.out.println("Error while reading file");
+            return;
+        }
+    }
+}

src/ru/fizteh/fivt/students/mrshoco/filemap/util/Data.java

@@ -0,0 +1,47 @@
+package util;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+public class Data {
+    public static HashMap<String, String> load(File fl) throws 
+                                        IOException, FileNotFoundException {
+        HashMap<String, String> hm = new HashMap<String, String>();
+        DataInputStream dis = new DataInputStream(new FileInputStream(fl));
+
+        while (dis.available() > 0) {
+            int keyLen = dis.readInt();
+            String key = "";
+            for (int i = 0; i < keyLen; i++) {
+                key += dis.readChar();
+            }
+            int valLen = dis.readInt();
+            String val = "";
+            for (int i = 0; i < valLen; i++) {
+                val += dis.readChar();
+            }
+            hm.put(key, val);
+        }
+        dis.close();
+        return hm;
+    }
+
+    public static void save(File fl, HashMap<String, String> hm) throws 
+                                        IOException, FileNotFoundException {
+        DataOutputStream dos = new DataOutputStream(new FileOutputStream(fl));
+        for (Map.Entry<String, String> element : hm.entrySet()) {
+            dos.writeInt(element.getKey().length());
+            dos.writeChars(element.getKey());
+            dos.writeInt(element.getValue().length());
+            dos.writeChars(element.getValue());
+        }
+        dos.close();
+    }
+}

src/ru/fizteh/fivt/students/mrshoco/filemap/util/Launcher.java

@@ -0,0 +1,79 @@
+package util;
+
+import java.util.HashMap;
+
+public class Launcher {
+    HashMap<String, String> hashMap;
+
+    public Launcher(HashMap<String, String> hm) {
+        hashMap = hm;
+    }
+
+    public void run(String[] cmd) throws Exception {
+        switch (cmd[0]) {
+        case "put":
+            if (cmd.length != 3) {
+                throw new IndexOutOfBoundsException("Wrong number of arguments");
+            }
+            put(cmd[1], cmd[2]);
+            break;
+        case "get":
+            if (cmd.length != 2) {
+                throw new IndexOutOfBoundsException("Wrong number of arguments");
+            }
+            get(cmd[1]);
+            break;
+        case "remove":
+            if (cmd.length != 2) {
+                throw new IndexOutOfBoundsException("Wrong number of arguments");
+            }
+            remove(cmd[1]);
+            break;
+        case "list":
+            if (cmd.length != 1) {
+                throw new IndexOutOfBoundsException("Wrong number of arguments");
+            }
+            list();
+            break;
+        case "exit":
+            if (cmd.length != 1) {
+                throw new IndexOutOfBoundsException("Wrong number of arguments");
+            }
+            throw new Exception("Exit");
+        default:
+            System.out.println("Bad command");
+        }
+    }
+
+    private void put(String key, String value) {
+        if (hashMap.containsKey(key)) {
+            System.out.println("overwrite\nold value");
+        } else {
+            System.out.println("new");
+        }
+        hashMap.put(key, value);
+    }
+
+    private void get(String key) {
+        if (hashMap.containsKey(key)) {
+            System.out.println("found\n" + hashMap.get(key));
+        } else {
+            System.out.println("not found");
+        }
+    }
+
+    private void remove(String key) {
+        if (hashMap.containsKey(key)) {
+            System.out.println("removed");
+            hashMap.remove(key);
+        } else {
+            System.out.println("not found");
+        }
+    }
+
+    private void list() {
+        for (String key : hashMap.keySet()) {
+            System.out.println(key + " ");
+        }
+    }
+}