Viewing file:  N3Serializer.py (3.24 KB) -rw-r--r--
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# rdflib/syntax/serializers/N3Serializer.py
from rdflib.syntax.serializers.TurtleSerializer import TurtleSerializer, SUBJECT, VERB, OBJECT
from rdflib.Graph import Graph
class N3Serializer(TurtleSerializer):
short_name = "n3"
def __init__(self, store, parent=None):
super(N3Serializer, self).__init__(store)
self.parent = parent
def reset(self):
super(N3Serializer, self).reset()
self._stores = {}
def getQName(self, uri):
qname = None
if self.parent is not None:
qname = self.parent.getQName(uri)
if qname is None:
qname = super(N3Serializer, self).getQName(uri)
return qname
def indent(self, modifier=0):
indent = super(N3Serializer, self).indent(modifier)
if self.parent is not None:
indent += self.parent.indent(modifier)
return indent
def p_clause(self, node, ignore=SUBJECT):
if isinstance(node, Graph):
self.subjectDone(node)
self.write(' {')
self.depth += 1
serializer = N3Serializer(node, parent=self)
serializer.serialize(self.stream)
self.depth -= 1
self.write('\n'+self.indent()+' }')
return True
else:
return False
def s_clause(self, subject):
if isinstance(subject, Graph):
self.write('\n'+self.indent())
self.p_clause(subject, SUBJECT)
self.predicateList(subject)
self.write('. ')
return True
else:
return False
def preprocessTriple(self, triple):
super(N3Serializer, self).preprocessTriple(triple)
if isinstance(triple[0], Graph):
for t in triple[0]:
self.preprocessTriple(t)
if isinstance(triple[2], Graph):
for t in triple[2]:
self.preprocessTriple(t)
def statement(self, subject):
self.subjectDone(subject)
properties = self.buildPredicateHash(subject)
if len(properties) == 0:
return
if not self.s_clause(subject):
super(N3Serializer, self).statement(subject)
def path(self, node, position):
if not self.p_clause(node, position):
super(N3Serializer, self).path(node, position)
def startDocument(self):
ns_list= list(self.namespaces.items())
ns_list.sort()
for prefix, uri in ns_list:
self.write('\n'+self.indent()+'@prefix %s: <%s>.'%(prefix, uri))
if len(ns_list) > 0:
self.write('\n')
#if not isinstance(self.store, N3Store):
# return
#all_list = [self.label(var) for var in self.store.get_universals(recurse=False)]
#all_list.sort()
#some_list = [self.label(var) for var in self.store.get_existentials(recurse=False)]
#some_list.sort()
#for var in all_list:
# self.write('\n'+self.indent()+'@forAll %s. '%var)
#for var in some_list:
# self.write('\n'+self.indent()+'@forSome %s. '%var)
#if (len(all_list) + len(some_list)) > 0:
# self.write('\n')
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