def metadata_criterion(value):
"""
Return a Criterion which matches against metadata.
:param value: a dictionary, mapping a regular expression of a metadata key
to a regular expression describing a metadata value.
:type value: dict mapping unicode to unicode
"""
def predicate(attribute):
for k, v in value.items():
if not re.compile(v).match(attribute.get(k, "")):
return False
return True
return Criterion(name='metadata', predicate=predicate)
def tenant_id_criterion(value):
"""
Return a Criterion which matches the given regular expression string
against the ``"tenant_Id"`` attribute.
"""
return Criterion(name='tenant_id', predicate=regexp_predicate(value))
def username_criterion(value):
"""
Return a Criterion which matches the given regular expression string
against the ``"username"`` attribute.
"""
return Criterion(name='username', predicate=regexp_predicate(value))