added files.

src/main/java/me/konsolas/aac/compat/nms/MinecraftReflection.java

@@ -0,0 +1,109 @@
+package me.konsolas.aac.compat.nms;
+
+import java.util.HashMap;
+import java.util.Map;
+import me.konsolas.aac.protocol.ProtocolVersion;
+import org.bukkit.Bukkit;
+
+public final class MinecraftReflection {
+
+    public static String craftBukkitPackage = Bukkit.getServer().getClass().getPackage().getName();
+
+    public static String minecraftPackage = craftBukkitPackage.replace("org.bukkit.craftbukkit", "net.minecraft.server");
+
+    private static final Map classCache = new HashMap();
+
+    private MinecraftReflection() {
+        throw new AssertionError();
+    }
+
+    private static Class resolveClass(String text) {
+        try {
+            if (classCache.containsKey(text)) {
+                return (Class) classCache.get(text);
+            } else {
+                Class classValue = Class.forName(text);
+                classCache.put(text, classValue);
+                return classValue;
+            }
+        } catch (ClassNotFoundException classNotFoundException) {
+            throw new IllegalArgumentException("Class not found: " + text, classNotFoundException);
+        }
+    }
+
+    public static Class getNmsClass(String text) {
+        String text2 = minecraftPackage + '.' + text;
+        String text3 = text2;
+        return resolveClass(text3);
+    }
+
+    public static Class getCraftClass(String text) {
+        String text2 = craftBukkitPackage + '.' + text;
+        String text3 = text2;
+        return resolveClass(text3);
+    }
+
+    public static Class getCraftPlayerClass() {
+        return getCraftClass((String) "entity.CraftPlayer");
+    }
+
+    public static Class getCraftWorldClass() {
+        return getCraftClass((String) "CraftWorld");
+    }
+
+    public static Class getCraftBlockClass() {
+        return getCraftClass((String) "block.CraftBlock");
+    }
+
+    public static Class getEntityClass() {
+        return getNmsClass((String) "Entity");
+    }
+
+    public static Class getEntityPlayerClass() {
+        return getNmsClass((String) "EntityPlayer");
+    }
+
+    public static Class getEntityHumanClass() {
+        return getNmsClass((String) "EntityHuman");
+    }
+
+    public static Class getWorldClass() {
+        return getNmsClass((String) "World");
+    }
+
+    public static Class getBlockClass() {
+        return getNmsClass((String) "Block");
+    }
+
+    public static Class getMovingObjectPositionClass() {
+        ProtocolVersion serverVersion = ProtocolVersion.getServerVersion();
+        ProtocolVersion version = ProtocolVersion.V1_14;
+        Class classValue;
+        if (serverVersion.isAtLeast(version)) {
+            classValue = getNmsClass((String) "MovingObjectPositionBlock");
+        } else {
+            classValue = getNmsClass((String) "MovingObjectPosition");
+        }
+        return classValue;
+    }
+
+    public static Class getBlockPositionClass() {
+        return getNmsClass((String) "BlockPosition");
+    }
+
+    public static Class getIBlockDataClass() {
+        return getNmsClass((String) "IBlockData");
+    }
+
+    public static Class getIBlockAccessClass() {
+        return getNmsClass((String) "IBlockAccess");
+    }
+
+    public static Class getVec3DClass() {
+        return getNmsClass((String) "Vec3D");
+    }
+
+    public static Class getVoxelShapeCollisionClass() {
+        return getNmsClass((String) "VoxelShapeCollision");
+    }
+}