Configurations for individual item types

Java/src/main/java/com/gildedrose/config/ProductFactory.java

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+package com.gildedrose.config;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+
+import com.gildedrose.enums.ProductType;
+import com.gildedrose.generic.ItemType;
+import com.gildedrose.types.AgedBrie;
+import com.gildedrose.types.Backstage;
+import com.gildedrose.types.Others;
+import com.gildedrose.types.Sulfuras;
+
+/***
+ * ProductFactory defines the instance of each items based on description of the item
+ * @author VIJAY G
+ *
+ */
+public class ProductFactory {
+
+	@SuppressWarnings("rawtypes")
+	private static Map<ProductType, ItemType> productMap = new HashMap<>();
+	static {
+		productMap.put(ProductType.AGED_BRIE, new AgedBrie());
+		productMap.put(ProductType.SULFURAS, new Sulfuras());
+		productMap.put(ProductType.BACKSTAGE_PASSES, new Backstage());
+	}
+	
+	@SuppressWarnings("rawtypes")
+	public static ItemType get(ProductType productType) {
+		ItemType itemType = productMap.get(productType);
+		if(Objects.isNull(itemType)) {
+			return new Others();
+		}
+		return itemType;
+	}
+
+}

Java/src/main/java/com/gildedrose/enums/ProductType.java

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+package com.gildedrose.enums;
+
+/***
+ * ProductType describes the type of Items
+ * @author VIJAY G
+ *
+ */
+public enum ProductType {
+	
+	AGED_BRIE("Aged Brie"), 
+	BACKSTAGE_PASSES("Backstage passes to a TAFKAL80ETC concert"),
+	SULFURAS("Sulfuras, Hand of Ragnaros");
+	
+	private final String productName;
+	
+	private ProductType(String productName) {
+		this.productName = productName;
+	}
+
+	public static ProductType getEnumByString(String code){
+        for(ProductType e : ProductType.values()){
+            if(e.productName.equals(code)) return e.valueOf(e.name());
+        }
+        return null;
+    }
+
+}

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

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+package com.gildedrose.types;
+
+import com.gildedrose.Item;
+import com.gildedrose.enums.CountType;
+import com.gildedrose.generic.ItemType;
+
+/***
+ * "Aged Brie" actually increases in Quality the older it gets
+ * the Quality of an item is never more than 50
+ * @author VIJAY G
+ *
+ */
+public class AgedBrie extends ItemType<AgedBrie> {
+	
+	public AgedBrie() {
+		super(false, CountType.MINUS, CountType.PLUS);
+	}
+	
+	public int getIncrementor(Item item) {
+		return (item.sellIn <= 0) ? 2 : INCREMENTOR;
+	}
+
+}

Java/src/main/java/com/gildedrose/types/Backstage.java

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+package com.gildedrose.types;
+
+import com.gildedrose.Item;
+import com.gildedrose.enums.CountType;
+import com.gildedrose.generic.ItemType;
+
+/***
+ * "Backstage passes", like aged brie, increases in Quality as its SellIn value approaches;
+ * @author VIJAY G
+ *
+ */
+public class Backstage extends ItemType<Backstage> {
+	
+	public Backstage() {
+		super(true, CountType.MINUS, CountType.PLUS);
+	}
+	
+	public boolean isNeutralized(Item item) {
+		return (item.sellIn < 0) ? true : false;
+	}
+
+}

Java/src/main/java/com/gildedrose/types/Others.java

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+package com.gildedrose.types;
+
+import com.gildedrose.enums.CountType;
+import com.gildedrose.generic.ItemType;
+
+/***
+ * Once the sell by date has passed, Quality degrades twice as fast
+ * The Quality of an item is never negative
+ * @author VIJAY G
+ *
+ */
+public class Others extends ItemType<Others> {
+	
+	public Others() {
+		super(false, CountType.MINUS, CountType.MINUS);
+	}
+
+}

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

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+package com.gildedrose.types;
+
+import com.gildedrose.enums.CountType;
+import com.gildedrose.generic.ItemType;
+
+/***
+ * "Sulfuras", being a legendary item, never has to be sold or decreases in Quality
+ * @author VIJAY G
+ *
+ */
+public class Sulfuras extends ItemType<Sulfuras> {
+	
+	public Sulfuras() {
+		super(true, CountType.NONE, CountType.NONE);
+	}
+
+}