[신예진] 1차 과제 제출

Java/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

Java/src/main/java/com/gildedrose/GildedRose.java

@@ -1,62 +1,21 @@
 package com.gildedrose;
 
+import com.gildedrose.update.UpdateLogic;
+import com.gildedrose.update.UpdateLogicFactory;
+
 class GildedRose {
     Item[] items;
+    UpdateLogicFactory updateLogicFactory;
 
     public GildedRose(Item[] items) {
         this.items = items;
+        updateLogicFactory = new UpdateLogicFactory();
     }
 
     public void updateQuality() {
-        for (int i = 0; i < items.length; i++) {
-            if (!items[i].name.equals("Aged Brie")
-                    && !items[i].name.equals("Backstage passes to a TAFKAL80ETC concert")) {
-                if (items[i].quality > 0) {
-                    if (!items[i].name.equals("Sulfuras, Hand of Ragnaros")) {
-                        items[i].quality = items[i].quality - 1;
-                    }
-                }
-            } else {
-                if (items[i].quality < 50) {
-                    items[i].quality = items[i].quality + 1;
-
-                    if (items[i].name.equals("Backstage passes to a TAFKAL80ETC concert")) {
-                        if (items[i].sellIn < 11) {
-                            if (items[i].quality < 50) {
-                                items[i].quality = items[i].quality + 1;
-                            }
-                        }
-
-                        if (items[i].sellIn < 6) {
-                            if (items[i].quality < 50) {
-                                items[i].quality = items[i].quality + 1;
-                            }
-                        }
-                    }
-                }
-            }
-
-            if (!items[i].name.equals("Sulfuras, Hand of Ragnaros")) {
-                items[i].sellIn = items[i].sellIn - 1;
-            }
-
-            if (items[i].sellIn < 0) {
-                if (!items[i].name.equals("Aged Brie")) {
-                    if (!items[i].name.equals("Backstage passes to a TAFKAL80ETC concert")) {
-                        if (items[i].quality > 0) {
-                            if (!items[i].name.equals("Sulfuras, Hand of Ragnaros")) {
-                                items[i].quality = items[i].quality - 1;
-                            }
-                        }
-                    } else {
-                        items[i].quality = items[i].quality - items[i].quality;
-                    }
-                } else {
-                    if (items[i].quality < 50) {
-                        items[i].quality = items[i].quality + 1;
-                    }
-                }
-            }
+        for (Item item : items) {
+            UpdateLogic updateLogic = updateLogicFactory.getUpdateLogic(item);
+            updateLogic.update(item);
         }
     }
 }

Java/src/main/java/com/gildedrose/update/AgedBrie.java

@@ -0,0 +1,19 @@
+package com.gildedrose.update;
+
+import static com.gildedrose.update.ItemConstants.*;
+
+import com.gildedrose.Item;
+
+public class AgedBrie extends UpdateLogic {
+
+    @Override
+    public void update(Item item) {
+
+        increaseQuality(item, DEFAULT_QUALITY_INCREMENT);
+        decreaseSellIn(item);
+
+        if (item.sellIn < QUALITY_MIN) {
+            increaseQuality(item, DEFAULT_QUALITY_INCREMENT);
+        }
+    }
+}

Java/src/main/java/com/gildedrose/update/BackstagePass.java

@@ -0,0 +1,33 @@
+package com.gildedrose.update;
+
+import static com.gildedrose.update.ItemConstants.*;
+
+import com.gildedrose.Item;
+
+public class BackstagePass extends UpdateLogic {
+
+    private static final int BACKSTAGE_SELL_IN_THRESHOLD_10 = 10;
+    private static final int BACKSTAGE_SELL_IN_THRESHOLD_5 = 5;
+
+    @Override
+    public void update(Item item) {
+
+        // 판매 기한이 10일 이하일 때 품질 1 증가
+        if (item.sellIn <= BACKSTAGE_SELL_IN_THRESHOLD_10) {
+            increaseQuality(item, DEFAULT_QUALITY_INCREMENT);
+        }
+
+        // 판매 기한이 5일 이하일 때 추가로 품질 1 증가
+        if (item.sellIn <= BACKSTAGE_SELL_IN_THRESHOLD_5) {
+            increaseQuality(item, DEFAULT_QUALITY_INCREMENT);
+        }
+
+        // 판매 기한 1일 감소
+        decreaseSellIn(item);
+
+        // 판매 기한이 지난 경우 품질을 0으로 설정
+        if (item.sellIn < QUALITY_MIN) {
+            item.quality = QUALITY_MIN;
+        }
+    }
+}

Java/src/main/java/com/gildedrose/update/Conjured.java

@@ -0,0 +1,25 @@
+package com.gildedrose.update;
+
+import static com.gildedrose.update.ItemConstants.*;
+
+import com.gildedrose.Item;
+
+public class Conjured extends UpdateLogic {
+
+    @Override
+    public void update(Item item) {
+
+        //"Conjured" 아이템은 일반 아이템의 2배의 속도로 품질(Quality)이 저하
+        decreaseQuality(item, QUALITY_DECREMENT_MULTIPLIER);
+        decreaseSellIn(item);
+
+        // 판매 기한이 0일 이하인 경우, 품질(Quality)을 추가로 2배 감소
+        if (item.sellIn < QUALITY_MIN && item.quality > QUALITY_MIN) {
+            item.quality -= QUALITY_DECREMENT_MULTIPLIER;
+        }
+
+        if (item.quality < QUALITY_MIN) {
+            item.quality = QUALITY_MIN;
+        }
+    }
+}

Java/src/main/java/com/gildedrose/update/DefaultItem.java

@@ -0,0 +1,19 @@
+package com.gildedrose.update;
+
+import static com.gildedrose.update.ItemConstants.*;
+
+import com.gildedrose.Item;
+
+public class DefaultItem extends UpdateLogic{
+
+    @Override
+    public void update(Item item) {
+
+        decreaseQuality(item, DEFAULT_QUALITY_DECREMENT);
+        decreaseSellIn(item);
+
+        if (item.sellIn < 0) {
+            decreaseQuality(item, DEFAULT_QUALITY_DECREMENT);
+        }
+    }
+}

Java/src/main/java/com/gildedrose/update/ItemConstants.java

@@ -0,0 +1,9 @@
+package com.gildedrose.update;
+
+public class ItemConstants {
+    public static final int QUALITY_MAX = 50;
+    public static final int QUALITY_MIN = 0;
+    public static final int DEFAULT_QUALITY_INCREMENT = 1;
+    public static final int DEFAULT_QUALITY_DECREMENT = 1;
+    public static final int QUALITY_DECREMENT_MULTIPLIER = 2;
+}

Java/src/main/java/com/gildedrose/update/Sulfuras.java

@@ -0,0 +1,10 @@
+package com.gildedrose.update;
+
+import com.gildedrose.Item;
+
+public class Sulfuras extends UpdateLogic {
+    @Override
+    public void update(Item item) {
+
+    }
+}

Java/src/main/java/com/gildedrose/update/UpdateLogic.java

@@ -0,0 +1,25 @@
+package com.gildedrose.update;
+
+import static com.gildedrose.update.ItemConstants.*;
+
+import com.gildedrose.Item;
+
+public abstract class UpdateLogic {
+
+    //판매일(SellIn) 감소
+    public void decreaseSellIn(Item item) {
+        item.sellIn--;
+    }
+
+    //품질(Quality)를 지정한 increment만큼 증가
+    public void increaseQuality(Item item, int increment) {
+        item.quality = Math.min(item.quality + increment, QUALITY_MAX);  // QUALITY_MAX 이상으로 증가하지 않음
+    }
+
+    //품질(Quality)를 지정한 decrement만큼 감소
+    public void decreaseQuality(Item item, int decrement) {
+        item.quality = Math.max(item.quality - decrement, QUALITY_MIN);  // QUALITY_MIN 이하로 감소하지 않음
+    }
+
+    public abstract void update(Item item);
+}

Java/src/main/java/com/gildedrose/update/UpdateLogicFactory.java

@@ -0,0 +1,20 @@
+package com.gildedrose.update;
+
+import com.gildedrose.Item;
+
+public class UpdateLogicFactory {
+    public static UpdateLogic getUpdateLogic(Item item){
+        switch (item.name) {
+            case "Aged Brie":
+                return new AgedBrie();
+            case "Backstage passes to a TAFKAL80ETC concert":
+                return new BackstagePass();
+            case "Sulfuras, Hand of Ragnaros":
+                return new Sulfuras();
+            case "Conjured Mana Cake":
+                return new Conjured();
+            default:
+                return new DefaultItem();
+        }
+    }
+}