Create ObjectCache

src/main/java/net/minestom/server/utils/ObjectCache.java

@@ -0,0 +1,28 @@
+package net.minestom.server.utils;
+
+import java.util.function.Supplier;
+
+/**
+ * Used to cache objects
+ *
+ * @param <T> type of the object
+ */
+public final class ObjectCache<T> {
+    private final Supplier<T> supplier;
+    private T obj;
+
+    public ObjectCache(Supplier<T> supplier) {
+        this.supplier = supplier;
+    }
+
+    public void invalidate() {
+        obj = null;
+    }
+
+    public T get() {
+        if (obj == null) {
+            obj = supplier.get();
+        }
+        return obj;
+    }
+}