From 7ce72ca7fadf35a249427ecb836b22abb04ab653 Mon Sep 17 00:00:00 2001
From: Jim Procter <jprocter@compbio.dundee.ac.uk>
Date: Sun, 7 Jul 2013 12:42:59 +0100
Subject: [PATCH] JAL-1332 make SSM context discovery safer (particularly in
 plugin context)

---
 src/jalview/structure/StructureSelectionManager.java |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/jalview/structure/StructureSelectionManager.java b/src/jalview/structure/StructureSelectionManager.java
index e598120..7415712 100644
--- a/src/jalview/structure/StructureSelectionManager.java
+++ b/src/jalview/structure/StructureSelectionManager.java
@@ -57,6 +57,10 @@ public class StructureSelectionManager
   public static StructureSelectionManager getStructureSelectionManager(
           StructureSelectionManagerProvider context)
   {
+    if (context==null)
+    {
+      throw new Error("Implementation error. Structure selection manager's context is 'null'", new NullPointerException("SSM context is null"));
+    }
     if (instances == null)
     {
       instances = new java.util.IdentityHashMap<StructureSelectionManagerProvider, StructureSelectionManager>();
-- 
1.7.10.2