Added entity type IDs as per vanilla spec.

By: Jeremy Wood <farachan@gmail.com>

paper-api/src/main/java/org/bukkit/entity/CreatureType.java

@@ -6,45 +6,50 @@ import java.util.Map;
 
 public enum CreatureType {
     // These strings MUST match the strings in nms.EntityTypes and are case sensitive.
-    CHICKEN("Chicken", Chicken.class),
+    CREEPER("Creeper", Creeper.class, 50),
-    COW("Cow", Cow.class),
+    SKELETON("Skeleton", Skeleton.class, 51),
-    CREEPER("Creeper", Creeper.class),
+    SPIDER("Spider", Spider.class, 52),
-    GHAST("Ghast", Ghast.class),
+    GIANT("Giant", Giant.class, 53),
-    GIANT("Giant", Giant.class),
+    ZOMBIE("Zombie", Zombie.class, 54),
-    MONSTER("Monster", Monster.class),
+    SLIME("Slime", Slime.class, 55),
-    PIG("Pig", Pig.class),
+    GHAST("Ghast", Ghast.class, 56),
-    PIG_ZOMBIE("PigZombie", PigZombie.class),
+    PIG_ZOMBIE("PigZombie", PigZombie.class, 57),
-    SHEEP("Sheep", Sheep.class),
+    ENDERMAN("Enderman", Enderman.class, 58),
-    SKELETON("Skeleton", Skeleton.class),
+    CAVE_SPIDER("CaveSpider", CaveSpider.class, 59),
-    SLIME("Slime", Slime.class),
+    SILVERFISH("Silverfish", Silverfish.class, 60),
-    SPIDER("Spider", Spider.class),
+    BLAZE("Blaze", Blaze.class, 61),
-    SQUID("Squid", Squid.class),
+    MAGMA_CUBE("LavaSlime", MagmaCube.class, 62),
-    ZOMBIE("Zombie", Zombie.class),
+    ENDER_DRAGON("EnderDragon", EnderDragon.class, 63),
-    WOLF("Wolf", Wolf.class),
+    PIG("Pig", Pig.class, 90),
-    CAVE_SPIDER("CaveSpider", CaveSpider.class),
+    SHEEP("Sheep", Sheep.class, 91),
-    ENDERMAN("Enderman", Enderman.class),
+    COW("Cow", Cow.class, 92),
-    SILVERFISH("Silverfish", Silverfish.class),
+    CHICKEN("Chicken", Chicken.class, 93),
-    ENDER_DRAGON("EnderDragon", EnderDragon.class),
+    SQUID("Squid", Squid.class, 94),
-    VILLAGER("Villager", Villager.class),
+    WOLF("Wolf", Wolf.class, 95),
-    BLAZE("Blaze", Blaze.class),
+    MUSHROOM_COW("MushroomCow", MushroomCow.class, 96),
-    MUSHROOM_COW("MushroomCow", MushroomCow.class),
+    SNOWMAN("SnowMan", Snowman.class, 97),
-    MAGMA_CUBE("LavaSlime", MagmaCube.class),
+    VILLAGER("Villager", Villager.class, 120);
-    SNOWMAN("SnowMan", Snowman.class);
 
     private String name;
     private Class<? extends Entity> clazz;
+    private short typeId;
 
-    private static final Map<String, CreatureType> mapping = new HashMap<String, CreatureType>();
+    private static final Map<String, CreatureType> NAME_MAP = new HashMap<String, CreatureType>();
+    private static final Map<Short, CreatureType> ID_MAP = new HashMap<Short, CreatureType>();
 
     static {
         for (CreatureType type : EnumSet.allOf(CreatureType.class)) {
-            mapping.put(type.name, type);
+            NAME_MAP.put(type.name, type);
+            if (type.typeId != 0) {
+                ID_MAP.put(type.typeId, type);
+            }
         }
     }
 
-    private CreatureType(String name, Class<? extends Entity> clazz) {
+    private CreatureType(String name, Class<? extends Entity> clazz, int typeId) {
         this.name = name;
         this.clazz = clazz;
+        this.typeId = (short) typeId;
     }
 
     public String getName() {
@@ -55,7 +60,18 @@ public enum CreatureType {
         return clazz;
     }
 
+    public short getTypeId() {
+        return typeId;
+    }
+
     public static CreatureType fromName(String name) {
-        return mapping.get(name);
+        return NAME_MAP.get(name);
+    }
+
+    public static CreatureType fromId(int id) {
+        if (id > Short.MAX_VALUE) {
+            return null;
+        }
+        return ID_MAP.get((short) id);
     }
 }