153 lines
5.4 KiB
Python
153 lines
5.4 KiB
Python
# Copyright 2014 IBM Corp.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import re
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from tempest import exceptions
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# Define the minimum and maximum version of the API across all of the
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# REST API. The format of the version is:
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# X.Y where:
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#
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# - X will only be changed if a significant backwards incompatible API
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# change is made which affects the API as whole. That is, something
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# that is only very very rarely incremented.
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#
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# - Y when you make any change to the API. Note that this includes
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# semantic changes which may not affect the input or output formats or
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# even originate in the API code layer. We are not distinguishing
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# between backwards compatible and backwards incompatible changes in
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# the versioning system. It must be made clear in the documentation as
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# to what is a backwards compatible change and what is a backwards
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# incompatible one.
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class APIVersionRequest(object):
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"""This class represents an API Version Request.
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This class provides convenience methods for manipulation
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and comparison of version numbers that we need to do to
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implement microversions.
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"""
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# NOTE: This 'latest' version is a magic number, we assume any
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# projects(Nova, etc.) never achieve this number.
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latest_ver_major = 99999
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latest_ver_minor = 99999
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def __init__(self, version_string=None):
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"""Create an API version request object.
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:param version_string: String representation of APIVersionRequest.
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Correct format is 'X.Y', where 'X' and 'Y' are int values.
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None value should be used to create Null APIVersionRequest,
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which is equal to 0.0
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"""
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self.ver_major = 0
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self.ver_minor = 0
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if version_string is not None:
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match = re.match(r"^([1-9]\d*)\.([1-9]\d*|0)$",
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version_string)
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if match:
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self.ver_major = int(match.group(1))
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self.ver_minor = int(match.group(2))
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elif version_string == 'latest':
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self.ver_major = self.latest_ver_major
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self.ver_minor = self.latest_ver_minor
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else:
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raise exceptions.InvalidAPIVersionString(
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version=version_string)
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def __str__(self):
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"""Debug/Logging representation of object."""
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return ("API Version Request: %s" % self.get_string())
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def is_null(self):
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return self.ver_major == 0 and self.ver_minor == 0
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def _format_type_error(self, other):
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return TypeError("'%(other)s' should be an instance of '%(cls)s'" %
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{"other": other, "cls": self.__class__})
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def __lt__(self, other):
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if not isinstance(other, APIVersionRequest):
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raise self._format_type_error(other)
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return ((self.ver_major, self.ver_minor) <
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(other.ver_major, other.ver_minor))
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def __eq__(self, other):
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if not isinstance(other, APIVersionRequest):
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raise self._format_type_error(other)
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return ((self.ver_major, self.ver_minor) ==
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(other.ver_major, other.ver_minor))
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def __gt__(self, other):
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if not isinstance(other, APIVersionRequest):
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raise self._format_type_error(other)
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return ((self.ver_major, self.ver_minor) >
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(other.ver_major, other.ver_minor))
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def __le__(self, other):
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return self < other or self == other
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def __ne__(self, other):
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return not self.__eq__(other)
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def __ge__(self, other):
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return self > other or self == other
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def matches(self, min_version, max_version):
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"""Matches the version object.
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Returns whether the version object represents a version
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greater than or equal to the minimum version and less than
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or equal to the maximum version.
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@param min_version: Minimum acceptable version.
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@param max_version: Maximum acceptable version.
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@returns: boolean
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If min_version is null then there is no minimum limit.
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If max_version is null then there is no maximum limit.
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If self is null then raise ValueError
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"""
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if self.is_null():
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raise ValueError
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if max_version.is_null() and min_version.is_null():
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return True
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elif max_version.is_null():
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return min_version <= self
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elif min_version.is_null():
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return self <= max_version
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else:
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return min_version <= self <= max_version
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def get_string(self):
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"""Version string representation.
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Converts object to string representation which if used to create
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an APIVersionRequest object results in the same version request.
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"""
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if self.is_null():
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return None
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if (self.ver_major == self.latest_ver_major and
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self.ver_minor == self.latest_ver_minor):
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return 'latest'
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return "%s.%s" % (self.ver_major, self.ver_minor)
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