-import re
-
-from sfa.util.faults import *
-
-# for convenience and smoother translation - we should get rid of these functions eventually
-def get_leaf(hrn): return Xrn(hrn).get_leaf()
-def get_authority(hrn): return Xrn(hrn).get_authority_hrn()
-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 urn_to_sliver_id(urn, slice_id, node_id, index=0):
- urn = urn.replace('+slice+', '+sliver+')
- return ":".join([urn, str(slice_id), str(node_id), str(index)])
-
-class Xrn:
-
- ########## basic tools on HRNs
- # split a HRN-like string into pieces
- # this is like split('.') except for escaped (backslashed) dots
- # e.g. hrn_split ('a\.b.c.d') -> [ 'a\.b','c','d']
- @staticmethod
- def hrn_split(hrn):
- return [ x.replace('--sep--','\\.') for x in hrn.replace('\\.','--sep--').split('.') ]
-
- # e.g. hrn_leaf ('a\.b.c.d') -> 'd'
- @staticmethod
- def hrn_leaf(hrn): return Xrn.hrn_split(hrn)[-1]
-
- # e.g. hrn_auth_list ('a\.b.c.d') -> ['a\.b', 'c']
- @staticmethod
- def hrn_auth_list(hrn): return Xrn.hrn_split(hrn)[0:-1]
-
- # e.g. hrn_auth ('a\.b.c.d') -> 'a\.b.c'
- @staticmethod
- def hrn_auth(hrn): return '.'.join(Xrn.hrn_auth_list(hrn))
-
- # e.g. escape ('a.b') -> 'a\.b'
- @staticmethod
- def escape(token): return re.sub(r'([^\\])\.', r'\1\.', token)
- # e.g. unescape ('a\.b') -> 'a.b'
- @staticmethod
- def unescape(token): return token.replace('\\.','.')
-
- URN_PREFIX = "urn:publicid:IDN"
-
- ########## basic tools on URNs
- @staticmethod
- def urn_full (urn):
- if urn.startswith(Xrn.URN_PREFIX): return urn
- else: return Xrn.URN_PREFIX+URN
- @staticmethod
- def urn_meaningful (urn):
- if urn.startswith(Xrn.URN_PREFIX): return urn[len(Xrn.URN_PREFIX):]
- else: return urn
- @staticmethod
- def urn_split (urn):
- return Xrn.urn_meaningful(urn).split('+')
-
- ####################
- # the local fields that are kept consistent
- # self.urn
- # self.hrn
- # self.type
- # self.path
- # provide either urn, or (hrn + type)
- def __init__ (self, xrn, type=None):
- if not xrn: xrn = ""
- # user has specified xrn : guess if urn or hrn
- if xrn.startswith(Xrn.URN_PREFIX):
- self.hrn=None
- self.urn=xrn
- self.urn_to_hrn()
- else:
- self.urn=None
- self.hrn=xrn
- self.type=type
- self.hrn_to_urn()
-# happens all the time ..
-# if not type:
-# debug_logger.debug("type-less Xrn's are not safe")
-
- def get_urn(self): return self.urn
- def get_hrn(self): return self.hrn
- def get_type(self): return self.type
- def get_hrn_type(self): return (self.hrn, self.type)
-
- def _normalize(self):
- if self.hrn is None: raise SfaAPIError, "Xrn._normalize"
- if not hasattr(self,'leaf'):
- self.leaf=Xrn.hrn_split(self.hrn)[-1]
- # self.authority keeps a list
- if not hasattr(self,'authority'):
- self.authority=Xrn.hrn_auth_list(self.hrn)
-
- def get_leaf(self):
- self._normalize()
- return self.leaf
-
- def get_authority_hrn(self):
- self._normalize()
- return '.'.join( self.authority )
-
- def get_authority_urn(self):
- self._normalize()
- return ':'.join( [Xrn.unescape(x) for x in self.authority] )
-
- def urn_to_hrn(self):
- """
- compute tuple (hrn, type) from urn
- """
-
-# if not self.urn or not self.urn.startswith(Xrn.URN_PREFIX):
- if not self.urn.startswith(Xrn.URN_PREFIX):
- raise SfaAPIError, "Xrn.urn_to_hrn"
-
- parts = Xrn.urn_split(self.urn)
- type=parts.pop(2)
- # Remove the authority name (e.g. '.sa')
- if type == 'authority':
- name = parts.pop()
- # Drop the sa. This is a bad hack, but its either this
- # or completely change how record types are generated/stored
- if name != 'sa':
- type = type + "+" + name
-
- # convert parts (list) into hrn (str) by doing the following
- # 1. remove blank parts
- # 2. escape dots inside parts
- # 3. replace ':' with '.' inside parts
- # 3. join parts using '.'
- hrn = '.'.join([Xrn.escape(part).replace(':','.') for part in parts if part])
-
- self.hrn=str(hrn)
- self.type=str(type)
-
- def hrn_to_urn(self):
- """
- compute urn from (hrn, type)
- """
-
-# if not self.hrn or self.hrn.startswith(Xrn.URN_PREFIX):
- if self.hrn.startswith(Xrn.URN_PREFIX):
- raise SfaAPIError, "Xrn.hrn_to_urn, hrn=%s"%self.hrn
-
- if self.type and self.type.startswith('authority'):
- self.authority = Xrn.hrn_split(self.hrn)
- type_parts = self.type.split("+")
- self.type = type_parts[0]
- name = 'sa'
- if len(type_parts) > 1:
- name = type_parts[1]
- else:
- self.authority = Xrn.hrn_auth_list(self.hrn)
- name = Xrn.hrn_leaf(self.hrn)
-
- authority_string = self.get_authority_urn()
-
- if self.type == None:
- urn = "+".join(['',authority_string,Xrn.unescape(name)])
- else:
- urn = "+".join(['',authority_string,self.type,Xrn.unescape(name)])
-
- self.urn = Xrn.URN_PREFIX + urn
-
- def dump_string(self):
- result="-------------------- XRN\n"
- result += "URN=%s\n"%self.urn
- result += "HRN=%s\n"%self.hrn
- result += "TYPE=%s\n"%self.type
- result += "LEAF=%s\n"%self.get_leaf()
- result += "AUTH(hrn format)=%s\n"%self.get_authority_hrn()
- result += "AUTH(urn format)=%s\n"%self.get_authority_urn()
- return result
-
+#----------------------------------------------------------------------\r
+# Copyright (c) 2008 Board of Trustees, Princeton University\r
+#\r
+# Permission is hereby granted, free of charge, to any person obtaining\r
+# a copy of this software and/or hardware specification (the "Work") to\r
+# deal in the Work without restriction, including without limitation the\r
+# rights to use, copy, modify, merge, publish, distribute, sublicense,\r
+# and/or sell copies of the Work, and to permit persons to whom the Work\r
+# is furnished to do so, subject to the following conditions:\r
+#\r
+# The above copyright notice and this permission notice shall be\r
+# included in all copies or substantial portions of the Work.\r
+#\r
+# THE WORK IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS \r
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF \r
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND \r
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT \r
+# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, \r
+# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, \r
+# OUT OF OR IN CONNECTION WITH THE WORK OR THE USE OR OTHER DEALINGS \r
+# IN THE WORK.\r
+#----------------------------------------------------------------------\r
+\r
+import re\r
+\r
+from sfa.util.faults import *\r
+\r
+# for convenience and smoother translation - we should get rid of these functions eventually \r
+def get_leaf(hrn): return Xrn(hrn).get_leaf()\r
+def get_authority(hrn): return Xrn(hrn).get_authority_hrn()\r
+def urn_to_hrn(urn): xrn=Xrn(urn); return (xrn.hrn, xrn.type)\r
+def hrn_to_urn(hrn,type): return Xrn(hrn, type=type).urn\r
+def hrn_authfor_hrn(parenthrn, hrn): return Xrn.hrn_is_auth_for_hrn(parenthrn, hrn)\r
+\r
+class Xrn:\r
+\r
+ ########## basic tools on HRNs\r
+ # split a HRN-like string into pieces\r
+ # this is like split('.') except for escaped (backslashed) dots\r
+ # e.g. hrn_split ('a\.b.c.d') -> [ 'a\.b','c','d']\r
+ @staticmethod\r
+ def hrn_split(hrn):\r
+ return [ x.replace('--sep--','\\.') for x in hrn.replace('\\.','--sep--').split('.') ]\r
+\r
+ # e.g. hrn_leaf ('a\.b.c.d') -> 'd'\r
+ @staticmethod\r
+ def hrn_leaf(hrn): return Xrn.hrn_split(hrn)[-1]\r
+\r
+ # e.g. hrn_auth_list ('a\.b.c.d') -> ['a\.b', 'c']\r
+ @staticmethod\r
+ def hrn_auth_list(hrn): return Xrn.hrn_split(hrn)[0:-1]\r
+ \r
+ # e.g. hrn_auth ('a\.b.c.d') -> 'a\.b.c'\r
+ @staticmethod\r
+ def hrn_auth(hrn): return '.'.join(Xrn.hrn_auth_list(hrn))\r
+ \r
+ # e.g. escape ('a.b') -> 'a\.b'\r
+ @staticmethod\r
+ def escape(token): return re.sub(r'([^\\])\.', r'\1\.', token)\r
+\r
+ # e.g. unescape ('a\.b') -> 'a.b'\r
+ @staticmethod\r
+ def unescape(token): return token.replace('\\.','.')\r
+\r
+ # Return the HRN authority chain from top to bottom.\r
+ # e.g. hrn_auth_chain('a\.b.c.d') -> ['a\.b', 'a\.b.c']\r
+ @staticmethod\r
+ def hrn_auth_chain(hrn):\r
+ parts = Xrn.hrn_auth_list(hrn)\r
+ chain = []\r
+ for i in range(len(parts)):\r
+ chain.append('.'.join(parts[:i+1]))\r
+ # Include the HRN itself?\r
+ #chain.append(hrn)\r
+ return chain\r
+\r
+ # Is the given HRN a true authority over the namespace of the other\r
+ # child HRN?\r
+ # A better alternative than childHRN.startswith(parentHRN)\r
+ # e.g. hrn_is_auth_for_hrn('a\.b', 'a\.b.c.d') -> True,\r
+ # but hrn_is_auth_for_hrn('a', 'a\.b.c.d') -> False\r
+ # Also hrn_is_uauth_for_hrn('a\.b.c.d', 'a\.b.c.d') -> True\r
+ @staticmethod\r
+ def hrn_is_auth_for_hrn(parenthrn, hrn):\r
+ if parenthrn == hrn:\r
+ return True\r
+ for auth in Xrn.hrn_auth_chain(hrn):\r
+ if parenthrn == auth:\r
+ return True\r
+ return False\r
+\r
+ URN_PREFIX = "urn:publicid:IDN"\r
+\r
+ ########## basic tools on URNs\r
+ @staticmethod\r
+ def urn_full (urn):\r
+ if urn.startswith(Xrn.URN_PREFIX): return urn\r
+ else: return Xrn.URN_PREFIX+URN\r
+ @staticmethod\r
+ def urn_meaningful (urn):\r
+ if urn.startswith(Xrn.URN_PREFIX): return urn[len(Xrn.URN_PREFIX):]\r
+ else: return urn\r
+ @staticmethod\r
+ def urn_split (urn):\r
+ return Xrn.urn_meaningful(urn).split('+')\r
+\r
+ ####################\r
+ # the local fields that are kept consistent\r
+ # self.urn\r
+ # self.hrn\r
+ # self.type\r
+ # self.path\r
+ # provide either urn, or (hrn + type)\r
+ def __init__ (self, xrn, type=None):\r
+ if not xrn: xrn = ""\r
+ # user has specified xrn : guess if urn or hrn\r
+ if xrn.startswith(Xrn.URN_PREFIX):\r
+ self.hrn=None\r
+ self.urn=xrn\r
+ self.urn_to_hrn()\r
+ else:\r
+ self.urn=None\r
+ self.hrn=xrn\r
+ self.type=type\r
+ self.hrn_to_urn()\r
+# happens all the time ..\r
+# if not type:\r
+# debug_logger.debug("type-less Xrn's are not safe")\r
+\r
+ def get_urn(self): return self.urn\r
+ def get_hrn(self): return self.hrn\r
+ def get_type(self): return self.type\r
+ def get_hrn_type(self): return (self.hrn, self.type)\r
+\r
+ def _normalize(self):\r
+ if self.hrn is None: raise SfaAPIError, "Xrn._normalize"\r
+ if not hasattr(self,'leaf'): \r
+ self.leaf=Xrn.hrn_split(self.hrn)[-1]\r
+ # self.authority keeps a list\r
+ if not hasattr(self,'authority'): \r
+ self.authority=Xrn.hrn_auth_list(self.hrn)\r
+\r
+ def get_leaf(self):\r
+ self._normalize()\r
+ return self.leaf\r
+\r
+ def get_authority_hrn(self): \r
+ self._normalize()\r
+ return '.'.join( self.authority )\r
+ \r
+ def get_authority_urn(self): \r
+ self._normalize()\r
+ return ':'.join( [Xrn.unescape(x) for x in self.authority] )\r
+ \r
+ def urn_to_hrn(self):\r
+ """\r
+ compute tuple (hrn, type) from urn\r
+ """\r
+ \r
+# if not self.urn or not self.urn.startswith(Xrn.URN_PREFIX):\r
+ if not self.urn.startswith(Xrn.URN_PREFIX):\r
+ raise SfaAPIError, "Xrn.urn_to_hrn"\r
+\r
+ parts = Xrn.urn_split(self.urn)\r
+ type=parts.pop(2)\r
+ # Remove the authority name (e.g. '.sa')\r
+ if type == 'authority':\r
+ name = parts.pop()\r
+ # Drop the sa. This is a bad hack, but its either this\r
+ # or completely change how record types are generated/stored \r
+ if name != 'sa':\r
+ type = type + "+" + name\r
+\r
+ # convert parts (list) into hrn (str) by doing the following\r
+ # 1. remove blank parts\r
+ # 2. escape dots inside parts\r
+ # 3. replace ':' with '.' inside parts\r
+ # 3. join parts using '.' \r
+ hrn = '.'.join([Xrn.escape(part).replace(':','.') for part in parts if part]) \r
+\r
+ self.hrn=str(hrn)\r
+ self.type=str(type)\r
+ \r
+ def hrn_to_urn(self):\r
+ """\r
+ compute urn from (hrn, type)\r
+ """\r
+\r
+# if not self.hrn or self.hrn.startswith(Xrn.URN_PREFIX):\r
+ if self.hrn.startswith(Xrn.URN_PREFIX):\r
+ raise SfaAPIError, "Xrn.hrn_to_urn, hrn=%s"%self.hrn\r
+\r
+ if self.type and self.type.startswith('authority'):\r
+ self.authority = Xrn.hrn_split(self.hrn)\r
+ type_parts = self.type.split("+")\r
+ self.type = type_parts[0]\r
+ name = 'sa'\r
+ if len(type_parts) > 1:\r
+ name = type_parts[1]\r
+ else:\r
+ self.authority = Xrn.hrn_auth_list(self.hrn)\r
+ name = Xrn.hrn_leaf(self.hrn)\r
+\r
+ authority_string = self.get_authority_urn()\r
+\r
+ if self.type == None:\r
+ urn = "+".join(['',authority_string,Xrn.unescape(name)])\r
+ else:\r
+ urn = "+".join(['',authority_string,self.type,Xrn.unescape(name)])\r
+ \r
+ self.urn = Xrn.URN_PREFIX + urn\r
+\r
+ def dump_string(self):\r
+ result="-------------------- XRN\n"\r
+ result += "URN=%s\n"%self.urn\r
+ result += "HRN=%s\n"%self.hrn\r
+ result += "TYPE=%s\n"%self.type\r
+ result += "LEAF=%s\n"%self.get_leaf()\r
+ result += "AUTH(hrn format)=%s\n"%self.get_authority_hrn()\r
+ result += "AUTH(urn format)=%s\n"%self.get_authority_urn()\r
+ return result\r
+ \r
git://git.onelab.eu / sfa.git / blobdiff