add 'authority' param to urn_to_sliver_id()

diff --git a/sfa/util/xrn.py b/sfa/util/xrn.py
index f48a377..c38fff5 100644 (file)
--- a/sfa/util/xrn.py
+++ b/sfa/util/xrn.py
@@ -32,8 +32,8 @@ def urn_to_hrn(urn): xrn=Xrn(urn); return (xrn.hrn, xrn.type)
 def hrn_to_urn(hrn,type): return Xrn(hrn, type=type).urn
 def hrn_authfor_hrn(parenthrn, hrn): return Xrn.hrn_is_auth_for_hrn(parenthrn, hrn)
 
-def urn_to_sliver_id(urn, slice_id, node_id, index=0):
-    return Xrn(urn).get_sliver_id(slice_id, node_id, index)
+def urn_to_sliver_id(urn, slice_id, node_id, index=0, authority=None):
+    return Xrn(urn).get_sliver_id(slice_id, node_id, index, authority)
 
 class Xrn:
 
@@ -162,9 +162,13 @@ class Xrn:
         self._normalize()
         return ':'.join( [Xrn.unescape(x) for x in self.authority] )
    
-    def get_sliver_id(self, slice_id, node_id, index=0):
+    def get_sliver_id(self, slice_id, node_id, index=0, authority=None):
         self._normalize()
-        return ":".join(map(str, [self.get_urn(), slice_id, node_id, index])) 
+        urn = self.get_urn()
+        if authority:
+            tmp_hrn = ".".join([authority,self.get_authority_hrn(), self.get_leaf()])
+            urn = Xrn(tmp_hrn, self.get_type()).get_urn()
+        return ":".join(map(str, [urn, slice_id, node_id, index])) 
  
     def urn_to_hrn(self):
         """