Submit the Design Patterns Course Assignments (#1)

* Submit the Ungraded Assignment on Adapter Pattern

* Submit the Ungraded Assignment on Composite Pattern

* Submit the Capstone Assignment on Command Pattern

* Submit the Ungraded Assignment on Observer Pattern

* Submit the Ungraded Assignment on MVC Pattern

* Submit the Capstone Assignment on MVC Pattern

* Submit the Capstone Assignment on Code Smells [Part 1]

* Submit the Capstone Assignment on Code Smells [Part 2]

Author: subhatav

src/course/week1/ungraded/adapter/CoffeeMachineInterface.java

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+package course.week1.ungraded.adapter;
+
+public interface CoffeeMachineInterface {
+
+  void chooseFirstSelection();
+
+  void chooseSecondSelection();
+}

src/course/week1/ungraded/adapter/CoffeeTouchscreenAdapter.java

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+package course.week1.ungraded.adapter;
+
+public class CoffeeTouchscreenAdapter implements CoffeeMachineInterface {
+
+  private final OldCoffeeMachine adaptedMachine;
+
+  public CoffeeTouchscreenAdapter(final OldCoffeeMachine vendingMachine) {
+
+    adaptedMachine = vendingMachine;
+  }
+
+  @Override
+  public void chooseFirstSelection() {
+
+    adaptedMachine.pressFirstButton();
+  }
+
+  @Override
+  public void chooseSecondSelection() {
+
+    adaptedMachine.pressSecondButton();
+  }
+}

src/course/week1/ungraded/adapter/OldCoffeeMachine.java

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+package course.week1.ungraded.adapter;
+
+public class OldCoffeeMachine {
+
+  public void pressFirstButton() {
+
+    // Original Machine - Button `1` Logic
+  }
+
+  public void pressSecondButton() {
+
+    // Original Machine - Button `2` Logic
+  }
+}

src/course/week1/ungraded/composite/IComponent.java

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+package course.week1.ungraded.composite;
+
+public interface IComponent {
+
+  void setSpeed(final float speed);
+
+  void play();
+
+  String getName();
+}

src/course/week1/ungraded/composite/Playlist.java

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+package course.week1.ungraded.composite;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Playlist implements IComponent {
+
+  private final String name;
+
+  private final List<IComponent> songs = new ArrayList<>();
+
+  public Playlist(final String name) {
+
+    this.name = name;
+  }
+
+  @Override
+  public void setSpeed(final float speed) {
+
+    for (final IComponent song : songs) {
+
+      song.setSpeed(speed);
+    }
+  }
+
+  @Override
+  public void play() {
+
+    for (final IComponent song : songs) {
+
+      song.play();
+    }
+  }
+
+  @Override
+  public String getName() {
+
+    return name;
+  }
+
+  public void insert(final IComponent song) {
+
+    songs.add(song);
+  }
+
+  public void delete(final IComponent song) {
+
+    songs.remove(song);
+  }
+}

src/course/week1/ungraded/composite/Program.java

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+package course.week1.ungraded.composite;
+
+public class Program {
+
+  public static void main(String[] args) {
+
+    final Playlist studyPlaylist = new Playlist("Study");
+
+    final Playlist synthPopPlaylist = new Playlist("Synth Pop");
+
+    final Song synthPopSong1 = new Song("Girl Like You", "Toro Y Moi");
+    final Song synthPopSong2 = new Song("Outside", "TOPS");
+
+    synthPopPlaylist.insert(synthPopSong1);
+    synthPopPlaylist.insert(synthPopSong2);
+
+    final Playlist experimentalPlaylist = new Playlist("Experimental");
+
+    final Song experimentalSong1 = new Song("About you", "XXYYXX");
+    final Song experimentalSong2 = new Song("Motivation", "Clams Casino");
+    final Song experimentalSong3 = new Song("Computer Vision", "Oneohtrix Point Never");
+
+    experimentalPlaylist.insert(experimentalSong1);
+    experimentalPlaylist.insert(experimentalSong2);
+    experimentalPlaylist.insert(experimentalSong3);
+
+    experimentalPlaylist.setSpeed(0.5f);
+    experimentalPlaylist.insert(synthPopPlaylist);
+    studyPlaylist.insert(experimentalPlaylist);
+
+    final Song glitchSong = new Song("Textuell", "Oval");
+
+    glitchSong.setSpeed(1.25f);
+    glitchSong.play();
+
+    System.out.printf("Song Name = [%s].%n", glitchSong.getName());
+    System.out.printf("Song Artist = [%s.]%n", glitchSong.getArtist());
+
+    studyPlaylist.insert(glitchSong);
+    studyPlaylist.play();
+
+    System.out.printf("Playlist Name = [%s].%n", studyPlaylist.getName());
+  }
+}

src/course/week1/ungraded/composite/Song.java

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+package course.week1.ungraded.composite;
+
+public class Song implements IComponent {
+
+  private final String name;
+  private final String artist;
+
+  private float speed = 1f;
+
+  public Song(final String name, final String artist) {
+
+    this.name = name;
+    this.artist = artist;
+  }
+
+  @Override
+  public void setSpeed(final float speed) {
+
+    this.speed = speed;
+  }
+
+  @Override
+  public void play() {
+
+    System.out.printf("Playing `%s` by `%s`, at %.2fx Speed...%n", name, artist, speed);
+  }
+
+  @Override
+  public String getName() {
+
+    return name;
+  }
+
+  public String getArtist() {
+
+    return artist;
+  }
+}

src/course/week2/capstone/command/AddContactActivity.java

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+package com.example.sharingapp;
+
+import android.content.Context;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.EditText;
+import javafx.scene.web.HTMLEditorSkin.Command;
+
+public class AddContactActivity extends AppCompatActivity {
+
+  private Context context;
+
+  private EditText username;
+  private EditText email;
+
+  private ContactList contactList = new ContactList();
+
+  @Override
+  protected void onCreate(final Bundle savedInstanceState) {
+
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.activity_add_contact);
+
+    username = (EditText) findViewById(R.id.username);
+    email = (EditText) findViewById(R.id.email);
+
+    context = getApplicationContext();
+    contactList.loadContacts(context);
+  }
+
+  public void saveContact(final View view) {
+
+    final String usernameStr = username.getText().toString();
+    final String emailStr = email.getText().toString();
+
+    if (usernameStr.equals("")) {
+
+      username.setError("Empty field!");
+      return;
+    }
+
+    if (emailStr.equals("")) {
+
+      email.setError("Empty field!");
+      return;
+    }
+
+    if (!emailStr.contains("@")) {
+
+      email.setError("Must be an email address!");
+      return;
+    }
+
+    if (!contactList.isUsernameAvailable(usernameStr)) {
+
+      username.setError("Username already taken!");
+      return;
+    }
+
+    final Contact contact = new Contact(usernameStr, emailStr, null);
+    final Command command = new AddContactCommand(contactList, contact, context);
+
+    command.execute();
+
+    if (!command.isExecuted()) {
+
+      return;
+    }
+
+    finish();
+  }
+}
+

src/course/week2/capstone/command/AddContactCommand.java

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+package com.example.sharingapp;
+
+import android.content.Context;
+
+public class AddContactCommand extends Command {
+
+  private final ContactList contactList;
+
+  private final Contact contact;
+  private final Context context;
+
+  public AddContactCommand(final ContactList contactList,
+            final Contact contact, final Context context) {
+
+    this.contactList = contactList;
+
+    this.contact = contact;
+    this.context = context;
+  }
+
+  @Override
+  public void execute() {
+
+    contactList.addContact(contact);
+    setIsExecuted(contactList.saveContacts(context));
+  }
+}

src/course/week2/capstone/command/DeleteContactCommand.java

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+package com.example.sharingapp;
+
+import android.content.Context;
+
+public class DeleteContactCommand extends Command {
+
+  private final ContactList contactList;
+
+  private final Contact contact;
+  private final Context context;
+
+  public DeleteContactCommand(final ContactList contactList,
+               final Contact contact, final Context context) {
+
+    this.contactList = contactList;
+
+    this.contact = contact;
+    this.context = context;
+  }
+
+  @Override
+  public void execute() {
+
+    contactList.deleteContact(contact);
+    setIsExecuted(contactList.saveContacts(context));
+  }
+}