# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

from copy import deepcopy

class Attribute:

    def __init__(self, isa=None, private=False, default=None, required=False, listof=None, priority=0, class_type=None, always_post_validate=False, inherit=True):
    """
    :class:`Attribute` specifies constraints for attributes of objects which
    derive from playbook data.  The attributes of the object are basically
    a schema for the yaml playbook.

    :kwarg isa: The type of the attribute.  Allowable values are a string
        representation of any yaml basic datatype, python class, or percent.
        (Enforced at post-validation time).
    :kwarg private: (not used)
    :kwarg default: Default value if unspecified in the YAML document.
    :kwarg required: Whether or not the YAML document must contain this field.
        If the attribute is None when post-validated, an error will be raised.
    :kwarg listof: If isa is set to "list", this can optionally be set to
        ensure that all elements in the list are of the given type. Valid
        values here are the same as those for isa.
    :kwarg priority: The order in which the fields should be parsed. Generally
        this does not need to be set, it is for rare situations where another
        field depends on the fact that another field was parsed first.
    :kwarg class_type: If isa is set to “class”, this can be optionally set to
        a class (not a string name). The YAML data for this field will be
        passed to the __init__ method of that class during post validation and
        the field will be an instance of that class.
    :kwarg always_post_validate: Controls whether a field should be post
        validated or not (default: True).
    :kwarg inherit: A boolean value, which controls whether the object
        containing this field should attempt to inherit the value from its
        parent object if the local value is None.
        """

        self.isa = isa
        self.private = private
        self.default = default
        self.required = required
        self.listof = listof
        self.priority = priority
        self.class_type = class_type
        self.always_post_validate = always_post_validate
        self.inherit = inherit

        if default is not None and self.isa in ('list', 'dict', 'set'):
            self.default = deepcopy(default)
        else:
            self.default = default

    def __eq__(self, other):
        return other.priority == self.priority

    def __ne__(self, other):
        return other.priority != self.priority

    # NB: higher priority numbers sort first

    def __lt__(self, other):
        return other.priority < self.priority

    def __gt__(self, other):
        return other.priority > self.priority

    def __le__(self, other):
        return other.priority <= self.priority

    def __ge__(self, other):
        return other.priority >= self.priority


class FieldAttribute(Attribute):
    pass

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Fix indentation