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# Software Management Providers
#
# Copyright (C) 2012-2013 Red Hat, Inc. All rights reserved.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Authors: Michal Minar <miminar@redhat.com>
#
"""
Common utilities for OpenLMI python providers.
"""
def parse_instance_id(instance_id, classname=None):
"""
Parse InstanceID, check it has LMI:<classname>:<ID> format and return
the ID. Return None if the format is bad.
:param instance_id: (``string``) String to parse.
:param classname: (``string``) Name of class, whose InstanceID we parse.
If the classname is None, it won't be checked.
:returns: ``string`` with the ID.
"""
parts = instance_id.split(":", 2)
if len(parts) != 3:
return None
if parts[0] != "LMI":
return None
real_classname = parts[1]
if classname and real_classname.lower() != classname.lower():
return None
return parts[2]
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