Fix villager data breaking versions below 1.14

src/main/java/com/comphenix/protocol/utility/MinecraftReflection.java

@@ -2025,7 +2025,7 @@ public class MinecraftReflection {
 				.orElseThrow(() -> new RuntimeException("Failed to find NMS class: " + className));
 	}
 
-	static Class<?> getNullableNMS(String className) {
+	public static Class<?> getNullableNMS(String className) {
 		if (minecraftPackage == null)
 			minecraftPackage = new CachedPackage(getMinecraftPackage(), getClassSource());
 		return minecraftPackage.getPackageClass(className).orElse(null);

src/main/java/com/comphenix/protocol/wrappers/WrappedVillagerData.java

@@ -3,24 +3,32 @@ package com.comphenix.protocol.wrappers;
 import com.comphenix.protocol.reflect.EquivalentConverter;
 import com.comphenix.protocol.reflect.StructureModifier;
 import com.comphenix.protocol.reflect.accessors.Accessors;
+import com.comphenix.protocol.reflect.accessors.ConstructorAccessor;
 import com.comphenix.protocol.utility.MinecraftReflection;
 
 public class WrappedVillagerData extends AbstractWrapper implements ClonableWrapper {
-    private static final Class<?> NMS_CLASS = MinecraftReflection.getMinecraftClass("VillagerData");
-    private static final Class<?> TYPE_CLASS = MinecraftReflection.getMinecraftClass("VillagerType");
-    private static final Class<?> PROF_CLASS = MinecraftReflection.getMinecraftClass("VillagerProfession");
+    private static final Class<?> NMS_CLASS = MinecraftReflection.getNullableNMS("VillagerData");
+    private static final Class<?> TYPE_CLASS = MinecraftReflection.getNullableNMS("VillagerType");
+    private static final Class<?> PROF_CLASS = MinecraftReflection.getNullableNMS("VillagerProfession");
 
-    private static final EquivalentConverter<Type> TYPE_CONVERTER = new EnumWrappers.FauxEnumConverter<>(Type.class, TYPE_CLASS);
-    private static final EquivalentConverter<Profession> PROF_CONVERTER = new EnumWrappers.FauxEnumConverter<>(Profession.class, PROF_CLASS);
+    private static EquivalentConverter<Type> TYPE_CONVERTER;
+    private static EquivalentConverter<Profession> PROF_CONVERTER;
+
+    static {
+        if (NMS_CLASS != null) {
+            TYPE_CONVERTER = new EnumWrappers.FauxEnumConverter<>(Type.class, TYPE_CLASS);
+            PROF_CONVERTER = new EnumWrappers.FauxEnumConverter<>(Profession.class, PROF_CLASS);
+        }
+    }
 
     public enum Type {
-        DESERT, JUNGLE, PLAINS, SAVANNA, SNOW, SWAMP, TAIGA;
+        DESERT, JUNGLE, PLAINS, SAVANNA, SNOW, SWAMP, TAIGA
     }
 
     public enum Profession {
         NONE, ARMORER, BUTCHER, CARTOGRAPHER, CLERIC, FARMER, FISHERMAN,
         FLETCHER, LEATHERWORKER, LIBRARIAN, MASON, NITWIT, SHEPHERD,
-        TOOLSMITH, WEAPONSMITH;
+        TOOLSMITH, WEAPONSMITH
     }
 
     private StructureModifier<Object> modifier;
@@ -36,12 +44,17 @@ public class WrappedVillagerData extends AbstractWrapper implements ClonableWrap
         return new WrappedVillagerData(handle);
     }
 
+    private static ConstructorAccessor CONSTRUCTOR;
+
     public static WrappedVillagerData fromValues(Type type, Profession profession, int level) {
         Object genericType = TYPE_CONVERTER.getGeneric(type);
         Object genericProf = PROF_CONVERTER.getGeneric(profession);
 
-        Object handle = Accessors.getConstructorAccessor(NMS_CLASS, TYPE_CLASS, PROF_CLASS, int.class)
-                .invoke(genericType, genericProf, level);
+        if (CONSTRUCTOR == null) {
+            CONSTRUCTOR = Accessors.getConstructorAccessor(NMS_CLASS, TYPE_CLASS, PROF_CLASS, int.class);
+        }
+
+        Object handle = CONSTRUCTOR.invoke(genericType, genericProf, level);
         return fromHandle(handle);
     }