Viewing file:  URIRef.py (2.38 KB) -rw-r--r--
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from sys import version_info
try:
from hashlib import md5
except ImportError:
from md5 import md5
if version_info[0:2] > (2, 2):
from unicodedata import normalize
else:
normalize = None
from urlparse import urlparse, urljoin, urldefrag
from rdflib.Identifier import Identifier
from rdflib.compat import rsplit
class URIRef(Identifier):
"""
RDF URI Reference: http://www.w3.org/TR/rdf-concepts/#section-Graph-URIref
"""
__slots__ = ()
def __new__(cls, value, base=None):
if base is not None:
ends_in_hash = value.endswith("#")
value = urljoin(base, value, allow_fragments=1)
if ends_in_hash:
if not value.endswith("#"):
value += "#"
#if normalize and value and value != normalize("NFC", value):
# raise Error("value must be in NFC normalized form.")
try:
rt = unicode.__new__(cls,value)
except UnicodeDecodeError:
rt = unicode.__new__(cls,value,'utf-8')
return rt
def n3(self):
return "<%s>" % self
def concrete(self):
if "#" in self:
return URIRef("/".join(rsplit(self, "#", 1)))
else:
return self
def abstract(self):
if "#" not in self:
scheme, netloc, path, params, query, fragment = urlparse(self)
if path:
return URIRef("#".join(rsplit(self, "/", 1)))
else:
if not self.endswith("#"):
return URIRef("%s#" % self)
else:
return self
else:
return self
def defrag(self):
if "#" in self:
url, frag = urldefrag(self)
return URIRef(url)
else:
return self
def __reduce__(self):
return (URIRef, (unicode(self),))
def __getnewargs__(self):
return (unicode(self), )
def __ne__(self, other):
return not self.__eq__(other)
def __eq__(self, other):
if isinstance(other, URIRef):
return unicode(self)==unicode(other)
else:
return False
def __str__(self):
return self.encode("unicode-escape")
def __repr__(self):
return """rdflib.URIRef('%s')""" % str(self)
def md5_term_hash(self):
d = md5(str(self))
d.update("U")
return d.hexdigest()
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