# HG changeset patch
# User Andre Heinecke <aheinecke@intevation.de>
# Date 1369380215 -7200
# Node ID a596ddb42fb395f2d445402f61b3f7f6678be8f4
# Parent  806fa23dffb3276aa268cc630082d8b94601f144
Return an empty string for the NULL object.

    This makes it "disappear" if it is used as part of a
    description or info string

diff -r 806fa23dffb3 -r a596ddb42fb3 artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/StackFrames.java
--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/StackFrames.java	Fri May 24 09:22:39 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/StackFrames.java	Fri May 24 09:23:35 2013 +0200
@@ -31,7 +31,12 @@
 {
     private static Logger log = Logger.getLogger(StackFrames.class);
 
-    public static final Object NULL = new Object();
+    public static final Object NULL = new Object() {
+        @Override
+        public String toString() {
+            return "";
+        }
+    };
 
     /** The frames (used like a stack). */
     protected List<Map<String, Object>> frames;