From 867eb7d9c7d082959ec947c81d7bdae96da0a7cc Mon Sep 17 00:00:00 2001
From: Celestino Bellone <3385346+cbellone@users.noreply.github.com>
Date: Fri, 3 May 2024 19:03:58 +0200
Subject: [PATCH] prevent NPE when loading metadata

---
 .../java/alfio/model/system/command/InvalidateAccess.java     | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/alfio/model/system/command/InvalidateAccess.java b/src/main/java/alfio/model/system/command/InvalidateAccess.java
index bbc6f0e3c..17cf0ae75 100644
--- a/src/main/java/alfio/model/system/command/InvalidateAccess.java
+++ b/src/main/java/alfio/model/system/command/InvalidateAccess.java
@@ -20,6 +20,8 @@
 import alfio.model.Ticket;
 import alfio.model.metadata.TicketMetadataContainer;
 
+import java.util.Objects;
+
 /**
  * Signals that access for the ticket must be invalidated on external systems
  */
@@ -39,7 +41,7 @@ public Ticket getTicket() {
     }
 
     public TicketMetadataContainer getTicketMetadataContainer() {
-        return ticketMetadataContainer;
+        return Objects.requireNonNullElseGet(ticketMetadataContainer, TicketMetadataContainer::empty);
     }
 
     public Event getEvent() {