entity type gui + command

src/main/java/me/unurled/sacredrealms/sr/data/gson/ItemStackSerializer.java

@@ -0,0 +1,32 @@
+package me.unurled.sacredrealms.sr.data.gson;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import org.bukkit.inventory.ItemStack;
+
+public class ItemStackSerializer implements JsonSerializer<ItemStack> {
+
+  /**
+   * Gson invokes this call-back method during serialization when it encounters a field of the
+   * specified type.
+   *
+   * <p>In the implementation of this call-back method, you should consider invoking {@link
+   * JsonSerializationContext#serialize(Object, Type)} method to create JsonElements for any
+   * non-trivial field of the {@code src} object. However, you should never invoke it on the {@code
+   * src} object itself since that will cause an infinite loop (Gson will call your call-back method
+   * again).
+   *
+   * @param src the object that needs to be converted to Json.
+   * @param typeOfSrc the actual type (fully genericized version) of the source object.
+   * @param context
+   * @return a JsonElement corresponding to the specified object.
+   */
+  @Override
+  public JsonElement serialize(ItemStack src, Type typeOfSrc, JsonSerializationContext context) {
+    return new JsonPrimitive(Arrays.toString(src.serializeAsBytes()));
+  }
+}