Add backwards compatibility for 1.14

src/main/java/me/libraryaddict/disguise/LibsDisguises.java

@@ -6,6 +6,7 @@ import me.libraryaddict.disguise.utilities.LibsPremium;
 import me.libraryaddict.disguise.utilities.metrics.MetricsInitalizer;
 import me.libraryaddict.disguise.utilities.packets.PacketsManager;
 import me.libraryaddict.disguise.utilities.parser.DisguiseParser;
+import me.libraryaddict.disguise.utilities.reflection.NmsVersion;
 import me.libraryaddict.disguise.utilities.reflection.ReflectionManager;
 import org.apache.commons.lang.StringUtils;
 import org.bukkit.Bukkit;
@@ -54,7 +55,8 @@ public class LibsDisguises extends JavaPlugin {
         YamlConfiguration pluginYml = ReflectionManager.getPluginYaml(getClassLoader());
         buildNumber = StringUtils.stripToNull(pluginYml.getString("build-number"));
 
-        getLogger().info("Discovered nms version: " + ReflectionManager.getBukkitVersion());
+        getLogger().info("Discovered nms version: " + ReflectionManager.getBukkitVersion() + " | " +
+                ReflectionManager.getVersion());
 
         getLogger().info("Jenkins Build: " + (isNumberedBuild() ? "#" : "") + getBuildNo());
 
@@ -68,9 +70,9 @@ public class LibsDisguises extends JavaPlugin {
                             " Command " + "Blocks, Admins)");
         }
 
-        if (!ReflectionManager.getMinecraftVersion().startsWith("1.15")) {
+        if (ReflectionManager.getVersion() == null) {
             getLogger().severe("You're using the wrong version of Lib's Disguises for your server! This is " +
-                    "intended for 1.15!");
+                    "intended for 1.14 & 1.15!");
             getPluginLoader().disablePlugin(this);
             return;
         }
@@ -90,6 +92,8 @@ public class LibsDisguises extends JavaPlugin {
 
         listener = new DisguiseListener(this);
 
+        registerCommand("libsdisguises", new LibsDisguisesCommand());
+
         if (!DisguiseConfig.isDisableCommands()) {
             registerCommand("disguise", new DisguiseCommand());
             registerCommand("undisguise", new UndisguiseCommand());
@@ -101,7 +105,6 @@ public class LibsDisguises extends JavaPlugin {
             registerCommand("undisguiseradius", new UndisguiseRadiusCommand(getConfig().getInt("UndisguiseRadiusMax")));
             registerCommand("disguisehelp", new DisguiseHelpCommand());
             registerCommand("disguiseclone", new DisguiseCloneCommand());
-            registerCommand("libsdisguises", new LibsDisguisesCommand());
             registerCommand("disguiseviewself", new DisguiseViewSelfCommand());
             registerCommand("disguisemodify", new DisguiseModifyCommand());
             registerCommand("disguisemodifyentity", new DisguiseModifyEntityCommand());

src/main/java/me/libraryaddict/disguise/commands/DisguiseModifyRadiusCommand.java

@@ -64,6 +64,10 @@ public class DisguiseModifyRadiusCommand extends DisguiseBaseCommand implements
             ArrayList<String> classes = new ArrayList<>();
 
             for (DisguiseType type : DisguiseType.values()) {
+                if (type.getEntityType() == null) {
+                    continue;
+                }
+
                 classes.add(type.toReadable());
             }
 
@@ -79,6 +83,10 @@ public class DisguiseModifyRadiusCommand extends DisguiseBaseCommand implements
 
         if (!isInteger(args[0])) {
             for (DisguiseType t : DisguiseType.values()) {
+                if (t.getEntityType() == null) {
+                    continue;
+                }
+
                 if (t.toReadable().replaceAll(" ", "").equalsIgnoreCase(args[0].replaceAll("_", ""))) {
                     baseType = t;
                     starting = 1;
@@ -193,6 +201,10 @@ public class DisguiseModifyRadiusCommand extends DisguiseBaseCommand implements
 
         if (args.length == 0) {
             for (DisguiseType type : DisguiseType.values()) {
+                if (type.getEntityType() == null) {
+                    continue;
+                }
+
                 tabs.add(type.toReadable().replaceAll(" ", "_"));
             }
 
@@ -203,6 +215,10 @@ public class DisguiseModifyRadiusCommand extends DisguiseBaseCommand implements
 
         if (!isInteger(args[0])) {
             for (DisguiseType t : DisguiseType.values()) {
+                if (t.getEntityType() == null) {
+                    continue;
+                }
+
                 if (t.toReadable().replaceAll(" ", "").equalsIgnoreCase(args[0].replaceAll("_", ""))) {
                     starting = 2;
                     break;

src/main/java/me/libraryaddict/disguise/disguisetypes/DisguiseType.java

@@ -1,10 +1,11 @@
 package me.libraryaddict.disguise.disguisetypes;
 
+import me.libraryaddict.disguise.utilities.reflection.NmsAdded;
+import me.libraryaddict.disguise.utilities.reflection.NmsVersion;
 import me.libraryaddict.disguise.utilities.translations.TranslateType;
 import org.apache.commons.lang.StringUtils;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.EntityType;
-import org.omg.CORBA.UNKNOWN;
 
 public enum DisguiseType {
     AREA_EFFECT_CLOUD(3, 0),
@@ -15,7 +16,7 @@ public enum DisguiseType {
 
     BAT,
 
-    BEE,
+    @NmsAdded(added = NmsVersion.v1_15) BEE,
 
     BLAZE,
 
@@ -256,7 +257,11 @@ public enum DisguiseType {
             }
         }
 
-        setEntityType(EntityType.valueOf(name()));
+        try {
+            setEntityType(EntityType.valueOf(name()));
+        }
+        catch (Exception ex) {
+        }
     }
 
     public int getDefaultData() {
@@ -275,6 +280,10 @@ public enum DisguiseType {
         return entityType;
     }
 
+    private void setEntityType(EntityType entityType) {
+        this.entityType = entityType;
+    }
+
     /**
      * The object type send in packets when spawning a misc entity. Otherwise, -1.
      *
@@ -301,6 +310,10 @@ public enum DisguiseType {
         return watcherClass;
     }
 
+    public void setWatcherClass(Class<? extends FlagWatcher> c) {
+        watcherClass = c;
+    }
+
     public boolean isMisc() {
         return getEntityType() != null && !getEntityType().isAlive();
     }
@@ -317,14 +330,6 @@ public enum DisguiseType {
         return this == DisguiseType.UNKNOWN;
     }
 
-    private void setEntityType(EntityType entityType) {
-        this.entityType = entityType;
-    }
-
-    public void setWatcherClass(Class<? extends FlagWatcher> c) {
-        watcherClass = c;
-    }
-
     public String toReadable() {
         String[] split = name().split("_");
 

src/main/java/me/libraryaddict/disguise/disguisetypes/MetaIndex.java

@@ -7,6 +7,10 @@ import com.comphenix.protocol.wrappers.nbt.NbtFactory;
 import com.comphenix.protocol.wrappers.nbt.NbtType;
 import me.libraryaddict.disguise.disguisetypes.watchers.*;
 import me.libraryaddict.disguise.utilities.DisguiseUtilities;
+import me.libraryaddict.disguise.utilities.reflection.NmsAdded;
+import me.libraryaddict.disguise.utilities.reflection.NmsRemoved;
+import me.libraryaddict.disguise.utilities.reflection.NmsVersion;
+import me.libraryaddict.disguise.utilities.reflection.ReflectionManager;
 import me.libraryaddict.disguise.utilities.translations.LibsMsg;
 import org.bukkit.Color;
 import org.bukkit.Material;
@@ -108,8 +112,10 @@ public class MetaIndex<Y> {
      */
     public static MetaIndex<Byte> BAT_HANGING = new MetaIndex<>(BatWatcher.class, 0, (byte) 1);
 
+    @NmsAdded(added = NmsVersion.v1_15)
     public static MetaIndex<Byte> BEE_META = new MetaIndex<>(BeeWatcher.class, 0, (byte) 0);
 
+    @NmsAdded(added = NmsVersion.v1_15)
     public static MetaIndex<Integer> BEE_ANGER = new MetaIndex<>(BeeWatcher.class, 1, 0);
 
     /**
@@ -199,6 +205,7 @@ public class MetaIndex<Y> {
      */
     public static MetaIndex<Boolean> ENDERMAN_AGRESSIVE = new MetaIndex<>(EndermanWatcher.class, 1, false);
 
+    @NmsAdded(added = NmsVersion.v1_15)
     public static MetaIndex<Boolean> ENDERMAN_UNKNOWN = new MetaIndex<>(EndermanWatcher.class, 2, false);
 
     /**
@@ -351,6 +358,7 @@ public class MetaIndex<Y> {
     /**
      * How many bee stings does the entity have
      */
+    @NmsAdded(added = NmsVersion.v1_15)
     public static MetaIndex<Integer> LIVING_STINGS = new MetaIndex<>(LivingWatcher.class, 5, 0);
 
     public static MetaIndex<Optional<BlockPosition>> LIVING_BED_POSITION = new MetaIndex<>(LivingWatcher.class, 6,
@@ -488,6 +496,7 @@ public class MetaIndex<Y> {
 
     public static MetaIndex<Byte> TRIDENT_ENCHANTS = new MetaIndex<>(TridentWatcher.class, 0, (byte) 0);
 
+    @NmsAdded(added = NmsVersion.v1_15)
     public static MetaIndex<Boolean> TRIDENT_ENCHANTED = new MetaIndex<>(TridentWatcher.class, 1, false);
 
     public static MetaIndex<Integer> TROPICAL_FISH_VARIANT = new MetaIndex<>(TropicalFishWatcher.class, 0, 0);
@@ -525,9 +534,12 @@ public class MetaIndex<Y> {
 
     public static MetaIndex<Boolean> WITHER_SKULL_BLUE = new MetaIndex<>(WitherSkullWatcher.class, 0, false);
 
-    public static MetaIndex<Boolean> WOLF_BEGGING = new MetaIndex<>(WolfWatcher.class, 0, false);
+    public static MetaIndex<Boolean> WOLF_BEGGING = new MetaIndex<>(WolfWatcher.class, 1, false);
 
-    public static MetaIndex<Integer> WOLF_COLLAR = new MetaIndex<>(WolfWatcher.class, 1, 14);
+    @NmsRemoved(removed = NmsVersion.v1_15)
+    public static MetaIndex<Float> WOLF_DAMAGE = new MetaIndex<>(WolfWatcher.class, 0, 1F);
+
+    public static MetaIndex<Integer> WOLF_COLLAR = new MetaIndex<>(WolfWatcher.class, 2, 14);
 
     public static MetaIndex<Boolean> ZOMBIE_BABY = new MetaIndex<>(ZombieWatcher.class, 0, false);
 
@@ -545,6 +557,7 @@ public class MetaIndex<Y> {
 
     static {
         setValues();
+        eliminateBlankIndexes();
         orderMetaIndexes();
     }
 
@@ -826,6 +839,10 @@ public class MetaIndex<Y> {
                 if (field.getType() != MetaIndex.class)
                     continue;
 
+                if (!ReflectionManager.isSupported(field)) {
+                    continue;
+                }
+
                 MetaIndex index = (MetaIndex) field.get(null);
 
                 if (index == null)

src/main/java/me/libraryaddict/disguise/disguisetypes/watchers/TridentWatcher.java

@@ -2,6 +2,8 @@ package me.libraryaddict.disguise.disguisetypes.watchers;
 
 import me.libraryaddict.disguise.disguisetypes.Disguise;
 import me.libraryaddict.disguise.disguisetypes.MetaIndex;
+import me.libraryaddict.disguise.utilities.reflection.NmsAdded;
+import me.libraryaddict.disguise.utilities.reflection.NmsVersion;
 
 /**
  * Created by libraryaddict on 6/08/2018.
@@ -11,12 +13,14 @@ public class TridentWatcher extends ArrowWatcher {
         super(disguise);
     }
 
+    @NmsAdded(added = NmsVersion.v1_15)
+    public boolean isEnchanted() {
+        return getData(MetaIndex.TRIDENT_ENCHANTED);
+    }
+
+    @NmsAdded(added = NmsVersion.v1_15)
     public void setEnchanted(boolean enchanted) {
         setData(MetaIndex.TRIDENT_ENCHANTED, enchanted);
         sendData(MetaIndex.TRIDENT_ENCHANTED);
     }
-
-    public boolean isEnchanted() {
-        return getData(MetaIndex.TRIDENT_ENCHANTED);
-    }
 }

src/main/java/me/libraryaddict/disguise/disguisetypes/watchers/WolfWatcher.java

@@ -3,6 +3,8 @@ package me.libraryaddict.disguise.disguisetypes.watchers;
 import me.libraryaddict.disguise.disguisetypes.AnimalColor;
 import me.libraryaddict.disguise.disguisetypes.Disguise;
 import me.libraryaddict.disguise.disguisetypes.MetaIndex;
+import me.libraryaddict.disguise.utilities.reflection.NmsRemoved;
+import me.libraryaddict.disguise.utilities.reflection.NmsVersion;
 import org.bukkit.DyeColor;
 
 public class WolfWatcher extends TameableWatcher {
@@ -15,23 +17,6 @@ public class WolfWatcher extends TameableWatcher {
         return AnimalColor.getColorByWool(getData(MetaIndex.WOLF_COLLAR)).getDyeColor();
     }
 
-    public boolean isBegging() {
-        return getData(MetaIndex.WOLF_BEGGING);
-    }
-
-    public void setBegging(boolean begging) {
-        setData(MetaIndex.WOLF_BEGGING, begging);
-        sendData(MetaIndex.WOLF_BEGGING);
-    }
-
-    public boolean isAngry() {
-        return isTameableFlag(2);
-    }
-
-    public void setAngry(boolean angry) {
-        setTameableFlag(2, angry);
-    }
-
     @Deprecated
     public void setCollarColor(AnimalColor color) {
         setCollarColor(color.getDyeColor());
@@ -49,4 +34,42 @@ public class WolfWatcher extends TameableWatcher {
         setData(MetaIndex.WOLF_COLLAR, (int) newColor.getWoolData());
         sendData(MetaIndex.WOLF_COLLAR);
     }
+
+    public boolean isBegging() {
+        return getData(MetaIndex.WOLF_BEGGING);
+    }
+
+    public void setBegging(boolean begging) {
+        setData(MetaIndex.WOLF_BEGGING, begging);
+        sendData(MetaIndex.WOLF_BEGGING);
+    }
+
+    public boolean isAngry() {
+        return isTameableFlag(2);
+    }
+
+    public void setAngry(boolean angry) {
+        setTameableFlag(2, angry);
+    }
+
+    /**
+     * Used for tail rotation.
+     *
+     * @return
+     */
+    @NmsRemoved(removed = NmsVersion.v1_15)
+    public float getDamageTaken() {
+        return getData(MetaIndex.WOLF_DAMAGE);
+    }
+
+    /**
+     * Used for tail rotation.
+     *
+     * @param damage
+     */
+    @NmsRemoved(removed = NmsVersion.v1_15)
+    public void setDamageTaken(float damage) {
+        setData(MetaIndex.WOLF_DAMAGE, damage);
+        sendData(MetaIndex.WOLF_DAMAGE);
+    }
 }

src/main/java/me/libraryaddict/disguise/utilities/DisguiseSound.java

@@ -19,8 +19,8 @@ public enum DisguiseSound {
     BAT(Sound.ENTITY_BAT_HURT, null, Sound.ENTITY_BAT_DEATH, Sound.ENTITY_BAT_AMBIENT, Sound.ENTITY_PLAYER_SMALL_FALL,
             Sound.ENTITY_BAT_LOOP, Sound.ENTITY_PLAYER_BIG_FALL, Sound.ENTITY_BAT_TAKEOFF),
 
-    BEE(Sound.ENTITY_BEE_HURT, null, Sound.ENTITY_BEE_DEATH, null, Sound.ENTITY_BEE_LOOP,
+    BEE("ENTITY_BEE_HURT", null, "ENTITY_BEE_DEATH", null, "ENTITY_BEE_LOOP", "ENTITY_BEE_LOOP_AGGRESSIVE",
-            Sound.ENTITY_BEE_LOOP_AGGRESSIVE, Sound.ENTITY_BEE_POLLINATE, Sound.ENTITY_BEE_STING),
+            "ENTITY_BEE_POLLINATE", "ENTITY_BEE_STING"),
 
     BLAZE(Sound.ENTITY_BLAZE_HURT, null, Sound.ENTITY_BLAZE_DEATH, Sound.ENTITY_BLAZE_AMBIENT,
             Sound.ENTITY_PLAYER_SMALL_FALL, Sound.ENTITY_PLAYER_BIG_FALL, Sound.ENTITY_BLAZE_BURN,
@@ -249,28 +249,60 @@ public enum DisguiseSound {
     private float damageSoundVolume = 1F;
     private LinkedHashMap<Object, SoundType> disguiseSounds = new LinkedHashMap<>();
 
-    DisguiseSound(Object hurt, Object step, Object death, Object idle, Sound... sounds) {
+    DisguiseSound(Object hurt, Object step, Object death, Object idle, Object... sounds) {
         addSound(hurt, SoundType.HURT);
         addSound(step, SoundType.STEP);
         addSound(death, SoundType.DEATH);
         addSound(idle, SoundType.IDLE);
 
-        for (Sound obj : sounds) {
+        for (Object obj : sounds) {
             addSound(obj, SoundType.CANCEL);
         }
     }
 
+    private Sound parseSound(String name) {
+        try {
+            return Sound.valueOf(name);
+        }
+        catch (Exception ex) {
+        }
+
+        return null;
+    }
+
     private void addSound(Object sound, SoundType type) {
         if (sound == null) {
             return;
         }
 
-        if (sound instanceof Sound) {
+        if (sound instanceof String[]) {
-            addSound((Sound) sound, type);
+            for (String s : (String[]) sound) {
+                Sound so = parseSound(s);
+
+                if (so == null) {
+                    continue;
+                }
+
+                addSound(so, type);
+            }
+        } else if (sound instanceof String) {
+            Sound so = parseSound((String) sound);
+
+            if (so == null) {
+                return;
+            }
+
+            addSound(so, type);
         } else if (sound instanceof Sound[]) {
             for (Sound s : (Sound[]) sound) {
+                if (s == null) {
+                    continue;
+                }
+
                 addSound(s, type);
             }
+        } else if (sound instanceof Sound) {
+            addSound((Sound) sound, type);
         } else {
             throw new IllegalArgumentException("Was given an unknown object " + sound);
         }
@@ -290,6 +322,10 @@ public enum DisguiseSound {
         return damageSoundVolume;
     }
 
+    public void setDamageAndIdleSoundVolume(float strength) {
+        this.damageSoundVolume = strength;
+    }
+
     public Object getSound(SoundType type) {
         if (type == null) {
             return null;
@@ -334,8 +370,4 @@ public enum DisguiseSound {
     public boolean isCancelSound(String sound) {
         return getSound(sound) == SoundType.CANCEL;
     }
-
-    public void setDamageAndIdleSoundVolume(float strength) {
-        this.damageSoundVolume = strength;
-    }
 }

src/main/java/me/libraryaddict/disguise/utilities/packets/packethandlers/PacketHandlerSpawn.java

@@ -17,6 +17,7 @@ import me.libraryaddict.disguise.utilities.packets.IPacketHandler;
 import me.libraryaddict.disguise.utilities.packets.LibsPackets;
 import me.libraryaddict.disguise.utilities.packets.PacketsHandler;
 import me.libraryaddict.disguise.utilities.reflection.DisguiseValues;
+import me.libraryaddict.disguise.utilities.reflection.NmsVersion;
 import me.libraryaddict.disguise.utilities.reflection.ReflectionManager;
 import org.bukkit.Art;
 import org.bukkit.Location;
@@ -224,11 +225,15 @@ public class PacketHandlerSpawn implements IPacketHandler {
 
             packets.addPacket(spawnPlayer);
 
-            PacketContainer metaPacket = ProtocolLibrary.getProtocolManager()
+            if (ReflectionManager.isSupported(NmsVersion.v1_15)) {
-                    .createPacketConstructor(PacketType.Play.Server.ENTITY_METADATA, entityId, newWatcher, true)
+                PacketContainer metaPacket = ProtocolLibrary.getProtocolManager()
-                    .createPacket(entityId, newWatcher, true);
+                        .createPacketConstructor(PacketType.Play.Server.ENTITY_METADATA, entityId, newWatcher, true)
+                        .createPacket(entityId, newWatcher, true);
 
-            packets.addPacket(metaPacket);
+                packets.addPacket(metaPacket);
+            } else {
+                spawnPlayer.getDataWatcherModifier().write(0, newWatcher);
+            }
 
             if (!selfDisguise) {
                 // Teleport the player back to where he's supposed to be
@@ -248,7 +253,7 @@ public class PacketHandlerSpawn implements IPacketHandler {
                 packets.addDelayedPacket(teleportPacket, 3);
 
                 // Send a metadata packet
-                metaPacket = new PacketContainer(PacketType.Play.Server.ENTITY_METADATA);
+                PacketContainer metaPacket = new PacketContainer(PacketType.Play.Server.ENTITY_METADATA);
 
                 newWatcher = DisguiseUtilities
                         .createSanitizedDataWatcher(WrappedDataWatcher.getEntityWatcher(disguisedEntity),
@@ -309,11 +314,15 @@ public class PacketHandlerSpawn implements IPacketHandler {
                     .createSanitizedDataWatcher(WrappedDataWatcher.getEntityWatcher(disguisedEntity),
                             disguise.getWatcher());
 
-            PacketContainer metaPacket = ProtocolLibrary.getProtocolManager()
+            if (ReflectionManager.isSupported(NmsVersion.v1_15)) {
-                    .createPacketConstructor(PacketType.Play.Server.ENTITY_METADATA, disguisedEntity.getEntityId(),
+                PacketContainer metaPacket = ProtocolLibrary.getProtocolManager()
-                            newWatcher, true).createPacket(disguisedEntity.getEntityId(), newWatcher, true);
+                        .createPacketConstructor(PacketType.Play.Server.ENTITY_METADATA, disguisedEntity.getEntityId(),
+                                newWatcher, true).createPacket(disguisedEntity.getEntityId(), newWatcher, true);
 
-            packets.addPacket(metaPacket);
+                packets.addPacket(metaPacket);
+            } else {
+                spawnEntity.getDataWatcherModifier().write(0, newWatcher);
+            }
         } else if (disguise.getType().isMisc()) {
             int data = ((MiscDisguise) disguise).getData();
             double x = loc.getX();

src/main/java/me/libraryaddict/disguise/utilities/parser/DisguiseParser.java

@@ -37,6 +37,10 @@ public class DisguiseParser {
     public static void createDefaultMethods() {
         try {
             for (DisguiseType type : DisguiseType.values()) {
+                if (type.getEntityType() == null) {
+                    continue;
+                }
+
                 Disguise disguise;
 
                 if (type.isMisc()) {
@@ -284,19 +288,21 @@ public class DisguiseParser {
     }
 
     public static DisguisePerm[] getDisguisePerms() {
-        DisguisePerm[] perms = new DisguisePerm[DisguiseType.values().length +
+        ArrayList<DisguisePerm> perms = new ArrayList<>();
-                DisguiseConfig.getCustomDisguises().size()];
-        int i = 0;
 
         for (DisguiseType disguiseType : DisguiseType.values()) {
-            perms[i++] = new DisguisePerm(disguiseType);
+            if (disguiseType.getEntityType() == null) {
+                continue;
+            }
+
+            perms.add(new DisguisePerm(disguiseType));
         }
 
         for (Entry<DisguisePerm, String> entry : DisguiseConfig.getCustomDisguises().entrySet()) {
-            perms[i++] = entry.getKey();
+            perms.add(entry.getKey());
         }
 
-        return perms;
+        return perms.toArray(new DisguisePerm[0]);
     }
 
     /**

src/main/java/me/libraryaddict/disguise/utilities/parser/params/ParamInfoManager.java

@@ -9,6 +9,7 @@ import me.libraryaddict.disguise.disguisetypes.watchers.PlayerWatcher;
 import me.libraryaddict.disguise.utilities.parser.DisguisePerm;
 import me.libraryaddict.disguise.utilities.parser.params.ParamInfo;
 import me.libraryaddict.disguise.utilities.parser.params.ParamInfoTypes;
+import me.libraryaddict.disguise.utilities.reflection.ReflectionManager;
 import org.bukkit.ChatColor;
 
 import javax.annotation.Nullable;
@@ -90,7 +91,9 @@ public class ParamInfoManager {
         while (itel.hasNext()) {
             Method method = itel.next();
 
-            if (method.getParameterTypes().length != 1) {
+            if (!ReflectionManager.isSupported(method)) {
+                itel.remove();
+            } else if (method.getParameterTypes().length != 1) {
                 itel.remove();
             } else if (method.getName().startsWith("get")) {
                 itel.remove();

src/main/java/me/libraryaddict/disguise/utilities/reflection/NmsAdded.java

@@ -0,0 +1,12 @@
+package me.libraryaddict.disguise.utilities.reflection;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Created by libraryaddict on 6/02/2020.
+ */
+@Retention(RetentionPolicy.RUNTIME)
+public @interface NmsAdded {
+    NmsVersion added();
+}

src/main/java/me/libraryaddict/disguise/utilities/reflection/NmsRemoved.java

@@ -0,0 +1,12 @@
+package me.libraryaddict.disguise.utilities.reflection;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Created by libraryaddict on 6/02/2020.
+ */
+@Retention(RetentionPolicy.RUNTIME)
+public @interface NmsRemoved {
+    NmsVersion removed();
+}

src/main/java/me/libraryaddict/disguise/utilities/reflection/NmsVersion.java

@@ -0,0 +1,9 @@
+package me.libraryaddict.disguise.utilities.reflection;
+
+/**
+ * Created by libraryaddict on 6/02/2020.
+ */
+public enum NmsVersion {
+    v1_14,
+    v1_15;
+}

src/main/java/me/libraryaddict/disguise/utilities/reflection/ReflectionManager.java

@@ -5,6 +5,7 @@ import com.comphenix.protocol.wrappers.*;
 import com.comphenix.protocol.wrappers.EnumWrappers.Direction;
 import com.comphenix.protocol.wrappers.WrappedDataWatcher.WrappedDataWatcherObject;
 import com.comphenix.protocol.wrappers.nbt.NbtWrapper;
+import lombok.Getter;
 import me.libraryaddict.disguise.DisguiseConfig;
 import me.libraryaddict.disguise.LibsDisguises;
 import me.libraryaddict.disguise.disguisetypes.*;
@@ -47,6 +48,12 @@ public class ReflectionManager {
     private static Field chunkProviderField;
     private static Field entityTrackerField;
     private static Field trackedEntitiesField;
+    @Getter
+    private static NmsVersion version;
+
+    public static boolean isSupported(NmsVersion version) {
+        return getVersion().ordinal() >= version.ordinal();
+    }
 
     public static void init() {
         try {
@@ -96,6 +103,52 @@ public class ReflectionManager {
         entityCountField.setAccessible(true);
     }
 
+    public static boolean isSupported(AccessibleObject obj) {
+        if (obj.isAnnotationPresent(NmsAdded.class)) {
+            NmsAdded added = obj.getAnnotation(NmsAdded.class);
+
+            // If it was added after/on this version
+            if (!isSupported(added.added())) {
+                return false;
+            }
+        }
+
+        if (obj.isAnnotationPresent(NmsRemoved.class)) {
+            NmsRemoved removed = obj.getAnnotation(NmsRemoved.class);
+
+            if (isSupported(removed.removed())) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public static boolean isSupported(Class cl, String name) {
+        try {
+            for (Field field : cl.getFields()) {
+                if (!field.getName().equals(name)) {
+                    continue;
+                }
+
+                return isSupported(field);
+            }
+
+            for (Method method : cl.getMethods()) {
+                if (!method.getName().equals(name)) {
+                    continue;
+                }
+
+                return isSupported(method);
+            }
+        }
+        catch (Exception ex) {
+            ex.printStackTrace();
+        }
+
+        return true;
+    }
+
     public static YamlConfiguration getPluginYaml(ClassLoader loader) {
         try (InputStream stream = loader.getResourceAsStream("plugin.yml")) {
             YamlConfiguration config = new YamlConfiguration();
@@ -286,6 +339,15 @@ public class ReflectionManager {
     public static String getBukkitVersion() {
         if (bukkitVersion == null) {
             bukkitVersion = Bukkit.getServer().getClass().getName().split("\\.")[3];
+
+            for (NmsVersion v : NmsVersion.values()) {
+                if (!getBukkitVersion().startsWith(v.name())) {
+                    continue;
+                }
+
+                version = v;
+                break;
+            }
         }
 
         return bukkitVersion;

src/main/java/me/libraryaddict/disguise/utilities/translations/TranslateFiller.java

@@ -17,7 +17,8 @@ public class TranslateFiller {
         // Fill the configs
 
         for (ParamInfo info : ParamInfoManager.getParamInfos()) {
-            TranslateType.DISGUISE_OPTIONS_PARAMETERS.save(info.getRawName(), "A disguise option name, has description " + info.getDescription());
+            TranslateType.DISGUISE_OPTIONS_PARAMETERS
+                    .save(info.getRawName(), "A disguise option name, has description " + info.getDescription());
 
             if (!info.getRawName().equals(info.getRawDescriptiveName())) {
                 TranslateType.DISGUISE_OPTIONS_PARAMETERS
@@ -51,6 +52,10 @@ public class TranslateFiller {
 
             TranslateType.DISGUISES.save(StringUtils.join(split, " "), "Name for the " + type.name() + " disguise");
 
+            if (type.getEntityType() == null) {
+                continue;
+            }
+
             for (Method method : ParamInfoManager.getDisguiseWatcherMethods(type.getWatcherClass())) {
                 Class para = method.getParameterTypes()[0];
                 String className = method.getDeclaringClass().getSimpleName().replace("Watcher", "");