From 3a42436fc9ce52e9689adf7166a9c5698224ec40 Mon Sep 17 00:00:00 2001
From: Leif Åstrand <leif@vaadin.com>
Date: Sun, 15 Mar 2015 15:09:32 +0200
Subject: Don't allow null view providers (#17028)

Change-Id: I5ce4885f19aaac2d4454b5a368f3e58453cf76f9
---
 server/src/com/vaadin/navigator/Navigator.java | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'server/src')

diff --git a/server/src/com/vaadin/navigator/Navigator.java b/server/src/com/vaadin/navigator/Navigator.java
index 65b3fec488..bd2b5711f8 100644
--- a/server/src/com/vaadin/navigator/Navigator.java
+++ b/server/src/com/vaadin/navigator/Navigator.java
@@ -745,9 +745,15 @@ public class Navigator implements Serializable {
      * the requested view name is found.
      * 
      * @param provider
-     *            provider to register
+     *            provider to register, not <code>null</code>
+     * @throws IllegalArgumentException
+     *             if the provided view provider is <code>null</code>
      */
     public void addProvider(ViewProvider provider) {
+        if (provider == null) {
+            throw new IllegalArgumentException(
+                    "Cannot add a null view provider");
+        }
         providers.add(provider);
     }
 
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