def __set__(self, obj, newvals):
log.debug("SET with descriptor value %s of type %s" % (newvals, type(newvals)))
if not isinstance(newvals, (list, tuple)):
raise AttributeError("to set a rdfList you must pass in a " + "list (it can be a list of one)")
try:
oldvals = obj.__dict__[self.name]
except KeyError:
oldvals = []
obj.__dict__[self.name] = oldvals
oldhead = obj.db.value(obj.resUri, self.pred)
# This is a stack style where retrevial is oppisite of how
# it starts out
# newnode = RDF.nil
# for value in newvals:
# almostnewnode = newnode
# newnode = BNode()
# obj.db.add((newnode, RDF.first, value2object(value)))
# obj.db.add((newnode, RDF.rest, almostnewnode))
if not newvals:
newhead = RDF.nil
else:
newhead = BNode()
newtail = newhead
oldtail = None
for value in newvals:
if oldtail:
obj.db.add((oldtail, RDF.rest, newtail))
obj.db.add((newtail, RDF.first, value2object(value)))
oldtail = newtail
newtail = BNode()
obj.db.add((oldtail, RDF.rest, RDF.nil))
obj.db.set((obj.resUri, self.pred, newhead))
if oldhead:
rdfSubject(oldhead)._remove(db=obj.db)
obj.__dict__[self.name] = copy(newvals)
def __set__(self, obj, newvals):
log.debug("SET with descriptor value %s of type %s" % (newvals, type(newvals)))
if not isinstance(newvals, (list, tuple)):
raise AttributeError("to set a rdfList you must pass in" + " a list (it can be a list of one)")
seq = obj.db.value(obj.resUri, self.pred)
if not seq:
seq = BNode()
obj.db.add((obj.resUri, self.pred, seq))
obj.db.add((seq, RDF.type, RDF.Seq))
for s, p, o in obj.db.triples((seq, None, None)):
if p.startswith(RDF["_"]):
obj.db.remove((s, p, o))
if isinstance(o, BNode) and o not in newvals:
rdfSubject(o)._remove(db=obj.db)
for i in range(len(newvals)):
obj.db.add((seq, RDF["_%i" % (i + 1)], value2object(newvals[i])))
obj.__dict__[self.name] = copy(newvals)
def __set__(self, obj, newvals):
log.debug("SET with descriptor value %s of type %s" %
(newvals, type(newvals)))
if not isinstance(newvals, (list, tuple)):
raise AttributeError("to set a rdfList you must pass in" +
" a list (it can be a list of one)")
seq = obj.db.value(obj.resUri, self.pred)
if not seq:
seq = BNode()
obj.db.add((obj.resUri, self.pred, seq))
obj.db.add((seq, RDF.type, RDF.Seq))
for s, p, o in obj.db.triples((seq, None, None)):
if p.startswith(RDF['_']):
obj.db.remove((s, p, o))
if isinstance(o, BNode) and o not in newvals:
rdfSubject(o)._remove(db=obj.db)
for i in range(len(newvals)):
obj.db.add((seq, RDF['_%i' % (i + 1)], value2object(newvals[i])))
obj.__dict__[self.name] = copy(newvals)
def _deserialize(self, data):
""" data has the pattern "<uri>" """
uri = data[1:-1]
# We have to retrieve the type to rebuild the object
attr = self.__dict__['field']
# Be careful when orig = None !!!!!
orig = getattr(attr.model, attr.name)
if None == orig:
return rdfSubject(rdflib.term.URIRef(uri))
elif isinstance(orig, list):
# rdfalchemy mapper gives me the solution
rt = attr.model.__class__.__dict__[attr.name].range_type
from rdfalchemy.orm import mapper
alch_map = mapper()
try:
cls = alch_map[str(rt)]
return cls(rdflib.term.URIRef(uri))
except:
rdfSubject(rdflib.term.URIRef(uri))
else:
return type(orig)(rdflib.term.URIRef(uri))
def _deserialize(self, data):
""" data has the pattern "<uri>" """
uri = data[1:-1]
# We have to retrieve the type to rebuild the object
attr = self.__dict__['field']
# Be careful when orig = None !!!!!
orig = getattr(attr.model, attr.name)
if None == orig:
return rdfSubject(rdflib.term.URIRef(uri))
elif isinstance(orig, list):
# rdfalchemy mapper gives me the solution
rt = attr.model.__class__.__dict__[attr.name].range_type
from rdfalchemy.orm import mapper
alch_map = mapper()
try:
cls = alch_map[str(rt)]
return cls(rdflib.term.URIRef(uri))
except:
rdfSubject(rdflib.term.URIRef(uri))
else:
return type(orig)(rdflib.term.URIRef(uri))
def __set__(self, obj, newvals):
log.debug("SET with descriptor value %s of type %s" %
(newvals, type(newvals)))
if not isinstance(newvals, (list, tuple)):
raise AttributeError("to set a rdfList you must pass in a " +
"list (it can be a list of one)")
try:
oldvals = obj.__dict__[self.name]
except KeyError:
oldvals = []
obj.__dict__[self.name] = oldvals
oldhead = obj.db.value(obj.resUri, self.pred)
# This is a stack style where retrevial is oppisite of how
# it starts out
# newnode = RDF.nil
# for value in newvals:
# almostnewnode = newnode
# newnode = BNode()
# obj.db.add((newnode, RDF.first, value2object(value)))
# obj.db.add((newnode, RDF.rest, almostnewnode))
if not newvals:
newhead = RDF.nil
else:
newhead = BNode()
newtail = newhead
oldtail = None
for value in newvals:
if oldtail:
obj.db.add((oldtail, RDF.rest, newtail))
obj.db.add((newtail, RDF.first, value2object(value)))
oldtail = newtail
newtail = BNode()
obj.db.add((oldtail, RDF.rest, RDF.nil))
obj.db.set((obj.resUri, self.pred, newhead))
if oldhead:
rdfSubject(oldhead)._remove(db=obj.db)
obj.__dict__[self.name] = copy(newvals)
