CORD Subscriber GUI - Plumbed through to XosManager - almost ready to wire up to RestClient code.

Change-Id: I3fc2aac924934489172abe67688e7166278c68ac
diff --git a/apps/demo/cord-gui/src/main/java/org/onosproject/cord/gui/model/UrlFilterFunction.java b/apps/demo/cord-gui/src/main/java/org/onosproject/cord/gui/model/UrlFilterFunction.java
index d1f8483..a2e2f2c 100644
--- a/apps/demo/cord-gui/src/main/java/org/onosproject/cord/gui/model/UrlFilterFunction.java
+++ b/apps/demo/cord-gui/src/main/java/org/onosproject/cord/gui/model/UrlFilterFunction.java
@@ -71,5 +71,16 @@
         public void setLevel(Level level) {
             this.level = level;
         }
+
+        public String level() {
+            return level.toString();
+        }
+    }
+
+    @Override
+    public String xosUrlApply(SubscriberUser user) {
+        XosFunctionDescriptor xfd = XosFunctionDescriptor.URL_FILTER;
+        UrlFilterMemento memo = (UrlFilterMemento) user.getMemento(xfd);
+        return xfd.id() + "/" + memo.level();
     }
 }