X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fnet%2Fpterodactylus%2Fsone%2Fnotify%2FListNotification.java;h=0c9e50435fc53226de929e5ca4fa530d3c492a27;hb=15975fffc055e2acfa129ce5821d2aa0cc045717;hp=039639eb176ee92e96b63d507067d9fca4f1f516;hpb=62573c314957b1851f4fbe693b8746686caa940a;p=Sone.git

diff --git a/src/main/java/net/pterodactylus/sone/notify/ListNotification.java b/src/main/java/net/pterodactylus/sone/notify/ListNotification.java
index 039639e..0c9e504 100644
--- a/src/main/java/net/pterodactylus/sone/notify/ListNotification.java
+++ b/src/main/java/net/pterodactylus/sone/notify/ListNotification.java
@@ -1,5 +1,5 @@
 /*
- * Sone - ListNotification.java - Copyright © 2010–2016 David Roden
+ * Sone - ListNotification.java - Copyright © 2010–2019 David Roden
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -37,7 +37,7 @@ public class ListNotification<T> extends TemplateNotification {
 	private final String key;
 
 	/** The list of new elements. */
-	private final List<T> elements = new CopyOnWriteArrayList<T>();
+	private final List<T> elements = new CopyOnWriteArrayList<>();
 
 	/**
 	 * Creates a new list notification.
@@ -96,7 +96,7 @@ public class ListNotification<T> extends TemplateNotification {
 	 * @return The current list of elements
 	 */
 	public List<T> getElements() {
-		return new ArrayList<T>(elements);
+		return new ArrayList<>(elements);
 	}
 
 	/**
@@ -129,8 +129,10 @@ public class ListNotification<T> extends TemplateNotification {
 	 *            The new element
 	 */
 	public void add(T element) {
-		elements.add(element);
-		touch();
+		if (!elements.contains(element)) {
+			elements.add(element);
+			touch();
+		}
 	}
 
 	/**