def traverse(self, name, furtherPath):
attr = getattr(self.context, name, _marker)
if attr is not _marker:
return attr
if hasattr(self.context, '__getitem__'):
try:
return self.context[name]
except KeyError:
pass
# Look for a sub-directory.
target_path = traversal_path(self.context, name)
for func, factory, setup in ((content_path, Directory,
metadata_setup), ):
path = isdir(func(target_path))
if path:
node = factory(path)
locate(node, self.context, name)
setup(node)
return node
# Look for content or metadata.
for func, factory, setup in ((content_path, Content, metadata_setup),
(metadata_path, Metadata,
metadata_setup)):
path = exists(func(target_path))
if path:
node = factory(path)
locate(node, self.context, name)
setup(node)
return node
raise TraversalError(self.context, name)
