Linked Map

src/main/java/org/zipcoder/store/ListMap.java

@@ -1,7 +1,9 @@
 package org.zipcoder.store;
 
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 public class ListMap implements MyMap {
     // instance field that is intialize to an ArrayList
@@ -9,40 +11,71 @@ public class ListMap implements MyMap {
 
     @Override
     public int size() {
-        return -1;
+        return entries.size();
     }
 
     @Override
     public boolean isEmptry() {
-        return false;
+        return (this.size() == 0);
     }
 
     @Override
     public Cart get(User key) {
         // find the cart associate with the key
+
+            for (Entry e: entries) {
+                if (e.getKey().equals(key)) {
+                    return e.getValue();
+                }
+            }
         return null;
     }
 
     @Override
     public void put(User key, Cart value) {
-        // add the key, value entry to the entries list
+        if (get(key) == null) {
+            entries.add(new Entry(key, value));
+        } else {
+            for (Entry e: entries) {
+                if (e.getKey().equals(key)) {
+                    e.setValue(value);
+                }
+            }
+        }
     }
 
-
     @Override
     public List<User> getKeys() {
         // get all the keys in the map
-        return null;
+
+        List<User> idSet = new ArrayList<>();
+
+        for (Entry e:entries) {
+            idSet.add(e.getKey());
+        }
+        return idSet;
     }
 
     @Override
     public List<Cart> getValues() {
-        // get all the values in the map
-        return null;
+        List<Cart> valueSet = new ArrayList<>();
+        for (Entry e: entries) {
+            valueSet.add(e.getValue());
+        }
+        return valueSet;
     }
 
     @Override
     public Cart remove(User key) {
+        Entry eTemp = null;
+
+        for (Entry e: entries) {
+            if (e.getKey().equals(key)) {
+                eTemp = e;
+                entries.remove(e);
+                return eTemp.getValue();
+            }
+        }
         return null;
     }
 }

src/test/java/org/zipcoder/store/ListMapTest.java

@@ -174,58 +174,58 @@ public class ListMapTest {
         Assert.assertTrue(values.contains(cart2));
     }
 
-//    I commented this out because it takes a long time to run. Uncomment it when implement your put method, uncomment this test
-//    @Test
-//    public void testPutAndGet_WithManyItems(){
-//        // Given
-//        int numberOfEntries = 70000;
-//
-//        for (int i = 0; i < numberOfEntries; i++) {
-//            myMap.put(new User(i), new Cart(i));
-//        }
-//
-//
-//        for (int i = 0; i < numberOfEntries; i++) {
-//            // When
-//            Cart actualCart = myMap.get(new User(i));
-//            Cart expectedCart = new Cart(i);
-//
-//            // Then
-//            Assert.assertEquals(actualCart, expectedCart);
-//        }
-//    }
-
-//    BONUS
-//    @Test
-//    public void testRemove(){
-//        // Given
-//        User user1 = new User("Lena");
-//        Cart cart1 = new Cart(11);
-//
-//        User user2 = new User("Jamal");
-//        Cart cart2 = new Cart(21);
-//
-//        User user3 = new User("Kelvin");
-//        Cart cart3 = new Cart(31);
-//
-//        // When
-//        myMap.put(user1, cart1);
-//        myMap.put(user2, cart2);
-//        myMap.put(user3, cart3);
-//
-//        // Then
-//        Cart actualCart = myMap.remove(user2);
-//
-//        Assert.assertEquals(cart2, actualCart);
-//        Assert.assertNull(myMap.get(user2));
-//    }
-//
-//    @Test
-//    public void testRemove_CartNotInTheMap(){
-//        // Given
-//        User user1 = new User("Lena");
-//
-//        // When & Then
-//        Assert.assertNull(myMap.remove(user1));
-//    }
+    //I commented this out because it takes a long time to run. Uncomment it when implement your put method, uncomment this test
+    @Test
+    public void testPutAndGet_WithManyItems(){
+        // Given
+        int numberOfEntries = 70000;
+
+        for (int i = 0; i < numberOfEntries; i++) {
+            myMap.put(new User(i), new Cart(i));
+        }
+
+
+        for (int i = 0; i < numberOfEntries; i++) {
+            // When
+            Cart actualCart = myMap.get(new User(i));
+            Cart expectedCart = new Cart(i);
+
+            // Then
+            Assert.assertEquals(actualCart, expectedCart);
+        }
+    }
+
+    //BONUS
+    @Test
+    public void testRemove(){
+        // Given
+        User user1 = new User("Lena");
+        Cart cart1 = new Cart(11);
+
+        User user2 = new User("Jamal");
+        Cart cart2 = new Cart(21);
+
+        User user3 = new User("Kelvin");
+        Cart cart3 = new Cart(31);
+
+        // When
+        myMap.put(user1, cart1);
+        myMap.put(user2, cart2);
+        myMap.put(user3, cart3);
+
+        // Then
+        Cart actualCart = myMap.remove(user2);
+
+        Assert.assertEquals(cart2, actualCart);
+        Assert.assertNull(myMap.get(user2));
+    }
+
+    @Test
+    public void testRemove_CartNotInTheMap(){
+        // Given
+        User user1 = new User("Lena");
+
+        // When & Then
+        Assert.assertNull(myMap.remove(user1));
+    }
 }