added files.

src/main/java/it/ytnoos/lpx/adapter/LegacyInventoryViewAdapter.java

@@ -0,0 +1,40 @@
+package it.ytnoos.lpx.adapter;
+
+import it.ytnoos.lpx.api.adapter.InventoryViewAdapter;
+
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.InventoryView;
+
+public class LegacyInventoryViewAdapter implements InventoryViewAdapter {
+
+    private final InventoryView inventoryView;
+
+    public LegacyInventoryViewAdapter(Player player) {
+        this.inventoryView = player.getOpenInventory();
+    }
+
+    public boolean isNull() {
+        return this.inventoryView == null;
+    }
+
+    public String getType() {
+        return this.inventoryView.getType().name();
+    }
+
+    public Inventory getTopInventory() {
+        return this.inventoryView.getTopInventory();
+    }
+
+    public Inventory getBottomInventory() {
+        return this.inventoryView.getBottomInventory();
+    }
+
+    public int countSlots() {
+        return this.inventoryView.countSlots();
+    }
+
+    public int convertSlot(int value) {
+        return this.inventoryView.convertSlot(value);
+    }
+}