From: Tony Mack <tmack@paris.CS.Princeton.EDU>
Date: Mon, 10 Sep 2012 19:08:49 +0000 (-0400)
Subject: updated set_authority
X-Git-Tag: sfa-2.1-14~8
X-Git-Url: http://git.onelab.eu/?a=commitdiff_plain;h=8f2102fc4f7ecf269bdf62480a63b9b044544098;p=sfa.git

updated set_authority
---

diff --git a/sfa/util/xrn.py b/sfa/util/xrn.py
index 2402de01..493cbba8 100644
--- a/sfa/util/xrn.py
+++ b/sfa/util/xrn.py
@@ -177,11 +177,9 @@ class Xrn:
         update the authority section of an existing urn
         """
         authority_hrn = self.get_authority_hrn()
-        old_hrn_parts = Xrn.hrn_split(self.hrn)
-        old_hrn_parts[0] = authority
-        hrn = ".".join(old_hrn_parts) 
-        self.hrn = hrn 
-        self.hrn_to_urn()
+        if not authority_hrn.startswith(authority+"."):
+            self.hrn = authority + "." + self.hrn
+            self.hrn_to_urn()
         self._normalize()
         
     def urn_to_hrn(self):