Don't remove monster weapons.

Changes the way monster equipment is handled from clearing _all_ items to clearing just the armor contents. This means that monsters that naturally spawn with weapons won't need their weapons added back in.

It also means that monsters that _occasionally_ spawn naturally with weapons now may do that in arenas. This is deemed acceptable, because:

- occasional weapons don't have as much of an impact as occasional armor,
- the forwards compatibility aspect is too valuable to pass up on, and
- should occasional weapons become too much of an issue, they can be conditionally removed, i.e. we can implement the _inverse_ behavior of what we had previously.

Fixes #641
Fixes #686

Co-authored-by: Andreas Troelsen <garbagemule@gmail.com>

changelog.md

@@ -18,9 +18,11 @@ These changes will (most likely) be included in the next version.
 
 ### Changed
 - MobArena now targets the Minecraft 1.17 version of the Spigot API (but still works on 1.13-1.16). This should make it easier to tackle feature requests and bug reports related to modern Minecraft.
+- Monsters are no longer stripped of the _weapons_ they spawn with naturally, only their _armor_. This should improve forwards compatibility with new weapon-reliant monsters.
 - The regex pattern for the player list command is now less greedy, so it will only match on `/ma players`, `/ma playerlist`, and `/ma player-list`. The previous pattern matched on anything that starts with `player`, which rendered the `/ma player-stats` command in MobArenaStats impossible to invoke.
 
 ### Fixed
+- Pillagers and vindicators no longer spawn without their much-needed weapons.
 - Reward groups with `nothing` in them no longer cause errors when earned/granted.
 
 ## [0.106] - 2021-05-09

src/main/java/com/garbagemule/MobArena/waves/MACreature.java

@@ -30,6 +30,7 @@ public class MACreature {
 
     private static final Map<String,MACreature> map = new HashMap<>();
     private static final List<DyeColor> colors = Arrays.asList(DyeColor.values());
+    private static final ItemStack[] NO_ARMOR = new ItemStack[0];
 
     static {
         registerEntityTypeValues();
@@ -88,8 +89,8 @@ public class MACreature {
 
     public LivingEntity spawn(Arena arena, World world, Location loc) {
         LivingEntity e = (LivingEntity) world.spawnEntity(loc, type);
-        e.getEquipment().clear();
         e.setCanPickupItems(false);
+        e.getEquipment().setArmorContents(NO_ARMOR);
 
         switch (this.name) {
             case "sheep":
@@ -128,10 +129,6 @@ public class MACreature {
             case "magmacubehuge":
                 ((Slime) e).setSize(4);
                 break;
-            case "skeleton":
-            case "stray":
-                e.getEquipment().setItemInMainHand(new ItemStack(Material.BOW, 1));
-                break;
             case "babyzombievillager":
             case "babyzombie":
                 ((Zombie) e).setBaby(true);
@@ -149,9 +146,6 @@ public class MACreature {
             case "killerbunny":
                 ((Rabbit) e).setRabbitType(Rabbit.Type.THE_KILLER_BUNNY);
                 break;
-            case "witherskeleton":
-                e.getEquipment().setItemInMainHand(new ItemStack(Material.STONE_SWORD, 1));
-                break;
             default:
                 break;
         }