def _make_uriref(string):
"""
internal function which returns rdflib.term.URIRef if successful;
returns False otherwise
"""
uri_pattern = _rfc.format_patterns()["URI"]
match = _re.compile(uri_pattern).match(string)
if not match:
return False
return _rb.term.URIRef(string.decode("unicode-escape"))
def _make_literal(string):
"""
internal function which returns rdflib.term.Literal if successful;
returns False otherwise
"""
# for literal string without other info
lit_pattern = ur'([^"\\]+(?:\\.[^"\\]*)*)'
# for literal string with other info
litinfo_name_pattern = ur'"([^"\\]*(?:\\.[^"\\]*)*)"' # has double quote
litinfo_info_pattern = ur'(?:@([a-z]+(?:-[a-z0-9]+)*)|\^\^(' + \
_rfc.format_patterns()["URI"] + ur'))?'
litinfo_pattern = litinfo_name_pattern + litinfo_info_pattern
# try matching both patterns
match_lit = _re.compile(lit_pattern).match(string)
match_litinfo = _re.compile(litinfo_pattern).match(string)
if match_lit:
lit = match_lit.groups()[0]
lit = lit.decode("unicode-escape") # encoding is unicode
lang = None
dtype = None
elif match_litinfo:
lit, lang, dtype = match_litinfo.groups()
lit = lit.decode("unicode-escape") # encoding is unicode
if lang:
lang = lang.decode("unicode-escape")
else:
lang = None
if dtype:
dtype = dtype.decode("unicode-escape")
else:
dtype = None
else: # if no match
return False
return _rb.term.Literal(lit, lang, dtype)