-### $Id$
-### $URL$
-
+#
+# WARNING - This file should be soon deprecated in favor of sfa.util.xrn
+#
+#
+# WARNING - This file should be soon deprecated in favor of sfa.util.xrn
+#
+#
+# WARNING - This file should be soon deprecated in favor of sfa.util.xrn
+#
+#
+# WARNING - This file should be soon deprecated in favor of sfa.util.xrn
+#
+#
+# WARNING - This file should be soon deprecated in favor of sfa.util.xrn
+#
+#
+# WARNING - This file should be soon deprecated in favor of sfa.util.xrn
+#
+import re
from sfa.util.faults import *
URN_PREFIX = "urn:publicid:IDN"
+def __get_hierarchy_delim_indexes(hrn):
+ # find all non escaped '.'
+ hierarchy_delim = '([a-zA-Z0-9][\.])'
+ parts = re.findall(hierarchy_delim, hrn)
+ # list of indexes for every hierarchy delimieter
+ indexes = []
+ for part in parts:
+ indexes.append(hrn.index(part) + 1)
+ return indexes
+
def get_leaf(hrn):
- parts = hrn.split(".")
- return ".".join(parts[-1:])
+ delim_indexes = __get_hierarchy_delim_indexes(hrn)
+ if not delim_indexes:
+ return hrn
+
+ last_delim_index = delim_indexes[-1:][0] + 1
+ return hrn[last_delim_index:]
def get_authority(xrn):
hrn, type = urn_to_hrn(xrn)
if type and type == 'authority':
return hrn
+
+ delim_indexes = __get_hierarchy_delim_indexes(hrn)
+ if not delim_indexes:
+ return ''
+ last_delim_index = delim_indexes[-1:][0]
+ return hrn[:last_delim_index]
- parts = hrn.split(".")
- return ".".join(parts[:-1])
-
def hrn_to_pl_slicename(hrn):
+ # remove any escaped no alpah numeric characters
+ #hrn = re.sub('\\\[^a-zA-Z0-9]', '', hrn)
+ hrn = re.sub(r'\\(.)', '', hrn)
parts = hrn.split(".")
return parts[-2] + "_" + parts[-1]
# assuming hrn is the hrn of an authority, return the plc authority name
def hrn_to_pl_authname(hrn):
+ # remove any escaped no alpah numeric characters
+ hrn = re.sub(r'\\(.)', '', hrn)
parts = hrn.split(".")
return parts[-1]
# assuming hrn is the hrn of an authority, return the plc login_base
def hrn_to_pl_login_base(hrn):
+ # remove any escaped no alpah numeric characters
+ hrn = re.sub(r'\\(.)', '', hrn)
return hrn_to_pl_authname(hrn)
def hostname_to_hrn(auth_hrn, login_base, hostname):
return urn, None
name = urn[len(URN_PREFIX):]
- hrn_parts = name.split("+")
-
- # type is always the second to last element in the list
- type = hrn_parts.pop(-2)
-
- # convert hrn_parts (list) into hrn (str) by doing the following
- # remove blank elements
- # replace ':' with '.'
- # join list elements using '.'
- hrn = '.'.join([part.replace(':', '.') for part in hrn_parts if part])
+ urn_parts = name.split("+")
+ type = urn_parts.pop(2)
+
# Remove the authority name (e.g. '.sa')
if type == 'authority':
- hrn = hrn[:hrn.rindex('.')]
-
+ urn_parts = urn_parts[:-1]
+
+ # convert hrn_parts (list) into hrn (str) by doing the following
+ # 1. remove blank elements
+ # 2. escape all non alpha numeric chars (excluding ':')
+ # 3. replace ':' with '.' (':' is the urn hierarchy delimiter)
+ # 4. join list elements using '.'
+ #hrn = '.'.join([part.replace('.', '\\.').replace(':', '.') for part in hrn_parts if part])
+ hrn = '.'.join([re.sub(r'([^a-zA-Z0-9\:])', r'\\\1', part).replace(':', '.') for part in urn_parts if part])
+
return str(hrn), str(type)
if not hrn or hrn.startswith(URN_PREFIX):
return hrn
- authority = get_authority(hrn)
- name = get_leaf(hrn)
-
if type == 'authority':
authority = hrn
name = 'sa'
+ else:
+ authority = get_authority(hrn)
+ name = get_leaf(hrn)
+
+ # convert from hierarchy delimiter from '.' to ':'
+ authority = re.sub(r'([a-zA-Z0-9])[\.]', r'\1:', authority)
+ # unescape escaped characters
+ authority = re.sub(r'\\(.)', r'\1', authority)
- if authority.startswith("plc"):
- if type == None:
- urn = "+".join(['',authority.replace('.',':'),name])
- else:
- urn = "+".join(['',authority.replace('.',':'),type,name])
-
+ if type == None:
+ urn = "+".join(['',authority,name])
else:
urn = "+".join(['',authority,type,name])
+
return URN_PREFIX + urn