def _turtle_to_ntriples(self, data):
# Turtle syntax is not supported by allegro graph
# HACK workaround using redland
import RDF
model = RDF.Model()
parser = RDF.TurtleParser()
try:
parser.parse_string_into_model(model, data.read(), '-')
except RDF.RedlandError, err:
raise TripleStoreError(err)
def _parse(self, file, format, base_uri=None):
if format == 'turtle':
parser = RDF.TurtleParser()
else:
parser = RDF.Parser(format)
if isinstance(base_uri, unicode):
base_uri = base_uri.encode('utf8')
data = file.read()
file.close()
try:
stream = parser.parse_string_as_stream(data, base_uri)
except RDF.RedlandError, err:
raise TripleStoreError(err)
def get_parser(url, format=None):
if format is None:
format = get_format(url)
if format == 'ttl':
parser = RDF.TurtleParser()
elif format == 'nt' or format == 'n3': # FIXME: this probably won't do for n3
parser = RDF.NTriplesParser()
elif format == 'nq':
parser = RDF.Parser(name='nquads')
elif format == 'rdf':
parser = RDF.Parser(name="rdfxml")
elif format == 'sparql':
return None
elif format == 'sitemap':
return None
else:
raise NameError("unsupported format")
return parser
if opt in ("-i", "--input"):
inputUri = "file:" + arg
elif opt in ("-o", "--output"):
outputUri = arg
elif opt in ("-h", "--help"):
help()
sys.exit(0)
if (inputUri == None):
sys.stderr.write("\nNo input file given.\n")
help()
sys.exit(1)
sys.stderr.write("Input: " + inputUri + "\n")
ttlParser = RDF.TurtleParser()
inStream = ttlParser.parse_as_stream(inputUri)
namespaces = ttlParser.namespaces_seen()
ntrSerializer = RDF.NTriplesSerializer()
string = ntrSerializer.serialize_stream_to_string(inStream)
bnode = re.compile(r'_(:[r0-9]+)')
string = re.sub(bnode, r'bnode\1', string)
string = "@prefix " + bnodePrefix + ": <" + bnodeNamespace + "> .\n" + string
outStream = ttlParser.parse_string_as_stream(string, inputUri)
ttlSerializer = RDF.Serializer(name="turtle")
