first draft iterator

assignments/iterator_pattern/BreakfastMenu.java

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+package assignments.iterator_pattern;
+
+import java.util.List;
+
+//Concrete Iterable Menu w/ ArrayList
+public class BreakfastMenu implements Menu {
+    private List<MenuItem> items;
+
+    public BreakfastMenu(List<MenuItem> items) {
+        this.items = items;
+    }
+
+    @Override
+    public void addItem(String name, String description, boolean vegetarian, double price) {
+        MenuItem item = new MenuItem(name, description, vegetarian, price);
+        items.add(item);
+    }
+
+    @Override
+    public BreakfastMenuIterator createIterator() {
+        return new BreakfastMenuIterator(items);
+    }
+}

assignments/iterator_pattern/BreakfastMenuIterator.java

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+package assignments.iterator_pattern;
+
+import java.util.List;
+import java.util.NoSuchElementException;
+
+//Concrete Iterator for Breakfast
+public class BreakfastMenuIterator implements MyIterator {
+    private int currentIndex = 0;
+    private List<MenuItem> menuItems;
+
+    public BreakfastMenuIterator(List<MenuItem> menuItems) {
+        this.menuItems = menuItems;
+    }
+
+    @Override
+    public boolean hasNext() {
+        return currentIndex < menuItems.size();
+    }
+
+    @Override
+    public MenuItem next() {
+        if (!hasNext()) {
+            throw new NoSuchElementException();
+        }
+
+        return menuItems.get(currentIndex++);
+    }
+}

assignments/iterator_pattern/DinnerMenu.java

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+package assignments.iterator_pattern;
+
+//Concrete Iterable w/ Array
+public class DinnerMenu implements Menu {
+    private int capacity = 0;
+    private MenuItem[] items = new MenuItem[capacity];
+
+    public DinnerMenu(MenuItem[] items) {
+        this.items = items;
+    }
+
+    @Override
+    public void addItem(String name, String description, boolean vegetarian, double price) {
+        MenuItem item = new MenuItem(name, description, vegetarian, price);
+        MenuItem[] increase = new MenuItem[capacity + 1];
+
+        for (int i = 0; i < increase.length; i++) {
+            if (i != increase.length) {
+                increase[i] = items[i];
+            } else {
+                increase[i] = item;
+            }
+        }
+    }
+
+    @Override
+    public DinnerMenuIterator createIterator() {
+        return new DinnerMenuIterator(items);
+    }
+}

assignments/iterator_pattern/DinnerMenuIterator.java

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+package assignments.iterator_pattern;
+
+import java.util.NoSuchElementException;
+
+//Concrete Iterator for Dinner
+public class DinnerMenuIterator implements MyIterator {
+    private int currentIndex = 0;
+    private MenuItem[] menuItems;
+
+    public DinnerMenuIterator(MenuItem[] menuItems) {
+        this.menuItems = menuItems;
+    }
+
+    @Override
+    public boolean hasNext() {
+        return currentIndex < menuItems.length;
+    }
+
+    @Override
+    public MenuItem next() {
+        if (!hasNext()) {
+            throw new NoSuchElementException();
+        }
+
+        MenuItem returnItem = menuItems[currentIndex];
+
+        currentIndex += 1;
+
+        return returnItem;
+    }
+}

assignments/iterator_pattern/Menu.java

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+package assignments.iterator_pattern;
+
+//Menu Interface for Iterable Menus
+public interface Menu {
+    public void addItem(String name, String description, boolean vegetarian, double price);
+
+    public MyIterator createIterator();
+}

assignments/iterator_pattern/MenuItem.java

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+package assignments.iterator_pattern;
+
+//Class for menu item
+public class MenuItem {
+    String name;
+    String description;
+    boolean vegetarian;
+    double price;
+
+    public MenuItem(String name, String description, boolean vegetarian, double price) {
+        this.name = name;
+        this.description = description;
+        this.vegetarian = vegetarian;
+        this.price = price;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public boolean isVegertarian() {
+        return vegetarian;
+    }
+}

assignments/iterator_pattern/MenuTest.java

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+package assignments.iterator_pattern;
+
+import java.util.ArrayList;
+import java.util.List;
+
+//Main
+public class MenuTest {
+    public static void main(String[] args) {
+        List<MenuItem> breakfastList = new ArrayList<>();
+
+        breakfastList.add(new MenuItem("Pancakes", "Sweet Circle Bread", false, 10));
+        breakfastList.add(new MenuItem("Eggs", "Non-Meat Protein", false, 8));
+
+        Menu dinnerMenu = new DinnerMenu(new MenuItem[] {
+                new MenuItem("Sushi", "Fish", false, 10),
+                new MenuItem("Chicken Tenders", "Battered Chicken", false, 10)
+        });
+
+        Menu breakfastMenu = new BreakfastMenu(breakfastList);
+        Waiter waiter = new Waiter(breakfastMenu, dinnerMenu); // Client
+
+        waiter.printMenu();
+    }
+}

assignments/iterator_pattern/MyIterator.java

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+package assignments.iterator_pattern;
+
+//Iterator Interface
+public interface MyIterator {
+    public boolean hasNext();
+
+    public MenuItem next();
+}

assignments/iterator_pattern/Waiter.java

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+package assignments.iterator_pattern;
+
+// The Client
+public class Waiter {
+    private Menu breakfastMenu;
+    private Menu dinnerMenu;
+
+    public Waiter(Menu breakfastMenu, Menu dinnerMenu) {
+        this.breakfastMenu = breakfastMenu;
+        this.dinnerMenu = dinnerMenu;
+    }
+
+    public void printMenu() {
+        System.out.println("------ Breakfast ------");
+        printMenu(breakfastMenu.createIterator());
+        System.out.println("------ Dinner ------");
+        printMenu(dinnerMenu.createIterator());
+    }
+
+    public void printMenu(MyIterator myIterator) {
+        while (myIterator.hasNext()) {
+            MenuItem item = myIterator.next();
+            System.out.println("Item: " + item.getName());
+            System.out.println("Description: " + item.getDescription());
+            System.out.println("Price: $" + item.getPrice());
+            if (item.isVegertarian() == true) {
+                System.out.println("Vegetarian: Yes");
+            } else {
+                System.out.println("Vegetarian: No");
+            }
+            System.out.println();
+        }
+    }
+}