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# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2019 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""An :class:`.Enum` class with additional features."""
from __future__ import absolute_import
__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "29/04/2019"
import enum
class Enum(enum.Enum):
"""Enum with additional class methods."""
@classmethod
def from_value(cls, value):
"""Convert a value to corresponding Enum member
:param value: The value to compare to Enum members
If it is already a member of Enum, it is returned directly.
:return: The corresponding enum member
:rtype: Enum
:raise ValueError: In case the conversion is not possible
"""
if isinstance(value, cls):
return value
for member in cls:
if value == member.value:
return member
raise ValueError("Cannot convert: %s" % value)
@classmethod
def members(cls):
"""Returns a tuple of all members.
:rtype: Tuple[Enum]
"""
return tuple(member for member in cls)
@classmethod
def names(cls):
"""Returns a tuple of all member names.
:rtype: Tuple[str]
"""
return tuple(member.name for member in cls)
@classmethod
def values(cls):
"""Returns a tuple of all member values.
:rtype: Tuple
"""
return tuple(member.value for member in cls)
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