⚡ Moved class definitions out of methods

src/main/java/tech/sbdevelopment/mapreflectionapi/api/MapManager.java

@@ -31,7 +31,6 @@ import org.jetbrains.annotations.Nullable;
 import tech.sbdevelopment.mapreflectionapi.exceptions.MapLimitExceededException;
 
 import java.awt.image.BufferedImage;
-import java.lang.reflect.InvocationTargetException;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -40,24 +39,12 @@ import java.util.concurrent.CopyOnWriteArrayList;
 public class MapManager {
     protected final Set<Integer> OCCUPIED_IDS = new HashSet<>();
     private final List<MapWrapper> MANAGED_MAPS = new CopyOnWriteArrayList<>();
-    private final Class<?> wrapperClass;
 
     public MapManager(JavaPlugin plugin) throws IllegalStateException {
         String packageName = Bukkit.getServer().getClass().getPackage().getName();
         String version = packageName.substring(packageName.lastIndexOf('.') + 1);
 
         plugin.getLogger().info("Initializing the map manager for Minecraft version " + version + "...");
-
-        try {
-            final Class<?> clazz = Class.forName("tech.sbdevelopment.mapreflectionapi.nms.MapWrapper_" + version);
-            if (MapWrapper.class.isAssignableFrom(clazz)) {
-                wrapperClass = clazz;
-            } else {
-                throw new IllegalStateException("Plugin corrupted! Detected invalid MapWrapper class.");
-            }
-        } catch (Exception ex) {
-            throw new IllegalStateException("This Spigot version (" + version + ") is not supported! Contact the developer to get support.");
-        }
     }
 
     @Nullable
@@ -74,15 +61,9 @@ public class MapManager {
     }
 
     private MapWrapper wrapNewImage(ArrayImage image) {
-        try {
+        MapWrapper wrapper = new MapWrapper(image);
-            MapWrapper wrapper = (MapWrapper) wrapperClass.getDeclaredConstructor(ArrayImage.class).newInstance(image);
         MANAGED_MAPS.add(wrapper);
         return wrapper;
-        } catch (NoSuchMethodException | InstantiationException | IllegalAccessException |
-                 InvocationTargetException e) {
-            e.printStackTrace();
-            return null;
-        }
     }
 
     public void unwrapImage(MapWrapper wrapper) {

src/main/java/tech/sbdevelopment/mapreflectionapi/api/MapSender.java

@@ -63,6 +63,9 @@ public class MapSender {
         }, 0, 2);
     }
 
+    private static final Class<?> packetPlayOutMapClass = ReflectionUtils.getNMSClass("network.protocol.game", "PacketPlayOutMap");
+    private static final Class<?> worldMapData = ReflectionUtils.supports(17) ? ReflectionUtils.getNMSClass("world.level.saveddata.maps", "WorldMap") : null;
+
     public static void sendMap(final int id0, final ArrayImage content, final Player player) {
         if (player == null || !player.isOnline()) {
             List<QueuedMap> toRemove = new ArrayList<>();
@@ -79,12 +82,10 @@ public class MapSender {
             return;
         }
 
-        Class<?> packetClass = ReflectionUtils.getNMSClass("network.protocol.game", "PacketPlayOutMap");
         final int id = -id0;
         Object packet;
         if (ReflectionUtils.supports(17)) { //1.17+
-            Class<?> worldMapClass = ReflectionUtils.getNMSClass("world.level.saveddata.maps", "WorldMap");
+            Object updateData = ReflectionUtil.callConstructor(worldMapData,
-            Object updateData = ReflectionUtil.callConstructor(worldMapClass,
                     content.minX, //X pos
                     content.minY, //Y pos
                     content.maxX, //X size (2nd X pos)
@@ -92,7 +93,7 @@ public class MapSender {
                     content.array //Data
             );
 
-            packet = ReflectionUtil.callConstructor(packetClass,
+            packet = ReflectionUtil.callConstructor(packetPlayOutMapClass,
                     id, //ID
                     (byte) 0, //Scale
                     false, //Show icons
@@ -100,7 +101,7 @@ public class MapSender {
                     updateData
             );
         } else if (ReflectionUtils.supports(14)) { //1.16-1.14
-            packet = ReflectionUtil.callConstructor(packetClass,
+            packet = ReflectionUtil.callConstructor(packetPlayOutMapClass,
                     id, //ID
                     (byte) 0, //Scale
                     false, //Tracking position
@@ -113,7 +114,7 @@ public class MapSender {
                     content.maxY //Y size (2nd Y pos)
             );
         } else { //1.13-
-            packet = ReflectionUtil.callConstructor(packetClass,
+            packet = ReflectionUtil.callConstructor(packetPlayOutMapClass,
                     id, //ID
                     (byte) 0, //Scale
                     false, //???

src/main/java/tech/sbdevelopment/mapreflectionapi/api/MapWrapper.java

@@ -43,6 +43,15 @@ public class MapWrapper {
         this.content = image;
     }
 
+    private static final Class<?> craftStackClass = ReflectionUtils.getCraftClass("CraftItemStack");
+    private static final Class<?> setSlotPacketClass = ReflectionUtils.getNMSClass("network.protocol.game", "PacketPlayOutSetSlot");
+    private static final Class<?> tagCompoundClass = ReflectionUtils.getCraftClass("NBTTagCompound");
+    private static final Class<?> entityClass = ReflectionUtils.getNMSClass("world.entity", "Entity");
+    private static final Class<?> dataWatcherClass = ReflectionUtils.getNMSClass("network.syncher", "DataWatcher");
+    private static final Class<?> entityMetadataPacketClass = ReflectionUtils.getNMSClass("network.protocol.game", "PacketPlayOutEntityMetadata");
+    private static final Class<?> entityItemFrameClass = ReflectionUtils.getNMSClass("world.entity.decoration", "EntityItemFrame");
+    private static final Class<?> dataWatcherItemClass = ReflectionUtils.getNMSClass("network.syncher", "DataWatcher$Item");
+
     protected MapController controller = new MapController() {
         private final Map<UUID, Integer> viewers = new HashMap<>();
 
@@ -134,10 +143,8 @@ public class MapWrapper {
 
             ItemStack stack = new ItemStack(ReflectionUtils.supports(13) ? Material.FILLED_MAP : Material.MAP, 1);
 
-            Class<?> craftStackClass = ReflectionUtils.getCraftClass("CraftItemStack");
             Object nmsStack = ReflectionUtil.callMethod(craftStackClass, "asNMSCopy", stack);
 
-            Class<?> setSlotPacketClass = ReflectionUtils.getNMSClass("network.protocol.game", "PacketPlayOutSetSlot");
             Object packet;
             if (ReflectionUtils.supports(17)) { //1.17+
                 int stateId = (int) ReflectionUtil.callMethod(inventoryMenu, ReflectionUtils.supports(18) ? "j" : "getStateId");
@@ -240,26 +247,17 @@ public class MapWrapper {
         }
 
         private void sendItemFramePacket(Player player, int entityId, ItemStack stack, int mapId) {
-            Class<?> craftStackClass = ReflectionUtils.getCraftClass("CraftItemStack");
             Object nmsStack = ReflectionUtil.callMethod(craftStackClass, "asNMSCopy", stack);
-
             Object nbtObject = ReflectionUtil.callMethod(nmsStack, ReflectionUtils.supports(19) ? "v" : ReflectionUtils.supports(18) ? "u" : ReflectionUtils.supports(13) ? "getOrCreateTag" : "getTag");
 
             if (!ReflectionUtils.supports(13) && nbtObject == null) { //1.12 has no getOrCreate, call create if null!
-                Class<?> tagCompoundClass = ReflectionUtils.getCraftClass("NBTTagCompound");
                 Object tagCompound = ReflectionUtil.callConstructor(tagCompoundClass);
-
                 ReflectionUtil.callMethod(nbtObject, "setTag", tagCompound);
             }
 
             ReflectionUtil.callMethod(nbtObject, ReflectionUtils.supports(18) ? "a" : "setInt", "map", mapId);
-
-            Class<?> entityClass = ReflectionUtils.getNMSClass("world.entity", "Entity");
-
-            Class<?> dataWatcherClass = ReflectionUtils.getNMSClass("network.syncher", "DataWatcher");
             Object dataWatcher = ReflectionUtil.callConstructor(dataWatcherClass, entityClass.cast(null));
 
-            Class<?> entityMetadataPacketClass = ReflectionUtils.getNMSClass("network.protocol.game", "PacketPlayOutEntityMetadata");
             Object packet = ReflectionUtil.callConstructor(entityMetadataPacketClass,
                     entityId,
                     dataWatcher, //dummy watcher!
@@ -267,9 +265,7 @@ public class MapWrapper {
             );
 
             List<Object> list = new ArrayList<>();
-            Class<?> entityItemFrameClass = ReflectionUtils.getNMSClass("world.entity.decoration", "EntityItemFrame");
             Object dataWatcherObject = ReflectionUtil.getDeclaredField(entityItemFrameClass, ReflectionUtils.supports(17) ? "ao" : ReflectionUtils.supports(14) ? "ITEM" : ReflectionUtils.supports(13) ? "e" : "c");
-            Class<?> dataWatcherItemClass = ReflectionUtils.getNMSClass("network.syncher", "DataWatcher$Item");
             Object dataWatcherItem = ReflectionUtil.callConstructor(dataWatcherItemClass, dataWatcherObject, nmsStack);
             list.add(dataWatcherItem);
             ReflectionUtil.setDeclaredField(packet, "b", list);