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Fixed duplicate creation of namespace prefixes #328

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Merged
merged 1 commit into from
Nov 7, 2013
Merged

Fixed duplicate creation of namespace prefixes #328

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11 changes: 11 additions & 0 deletions rdflib/namespace.py
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Original file line number Diff line number Diff line change
Expand Up @@ -351,6 +351,12 @@ def bind(self, prefix, namespace, override=True):
if prefix is None:
prefix = ''
bound_namespace = self.store.namespace(prefix)
# Check if the bound_namespace contains a URI
# and if so convert it into a URIRef for comparison
# This is to prevent duplicate namespaces with the
# same URI
if bound_namespace:
bound_namespace = URIRef(bound_namespace)
if bound_namespace and bound_namespace != namespace:
# prefix already in use for different namespace
#
Expand All @@ -361,6 +367,11 @@ def bind(self, prefix, namespace, override=True):
num = 1
while 1:
new_prefix = "%s%s" % (prefix, num)
tnamespace = self.store.namespace(new_prefix)
if tnamespace and namespace == URIRef(tnamespace):
# the prefix is already bound to the correct
# namespace
return
if not self.store.namespace(new_prefix):
break
num += 1
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