From a98d595162f42f45f716e10d1ea14eb88ab4fbea Mon Sep 17 00:00:00 2001
From: Petr Pchelko <pchelko@openjdk.org>
Date: Tue, 23 Jul 2013 13:09:44 +0400
Subject: [PATCH] 7184951: [macosx] Exception at java.awt.datatransfer on
 headless mode (only in GUI session)

Reviewed-by: art, anthony
---
 .../macosx/classes/sun/lwawt/macosx/CDataTransferer.java    | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/jdk/src/macosx/classes/sun/lwawt/macosx/CDataTransferer.java b/jdk/src/macosx/classes/sun/lwawt/macosx/CDataTransferer.java
index 35c6ef6d54d..b4f0f97823a 100644
--- a/jdk/src/macosx/classes/sun/lwawt/macosx/CDataTransferer.java
+++ b/jdk/src/macosx/classes/sun/lwawt/macosx/CDataTransferer.java
@@ -182,7 +182,11 @@ public class CDataTransferer extends DataTransferer {
         Long format = predefinedClipboardNameMap.get(str);
 
         if (format == null) {
-            format = new Long(registerFormatWithPasteboard(str));
+            if (java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment().isHeadlessInstance()) {
+                // Do not try to access native system for the unknown format
+                return -1L;
+            }
+            format = registerFormatWithPasteboard(str);
             predefinedClipboardNameMap.put(str, format);
             predefinedClipboardFormatMap.put(format, str);
         }