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−# copyright 2004-2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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−# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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−#
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−# This file is part of yams.
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−#
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−# yams is free software: you can redistribute it and/or modify it under the
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−# terms of the GNU Lesser General Public License as published by the Free
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−# Software Foundation, either version 2.1 of the License, or (at your option)
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−# any later version.
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−#
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−# yams is distributed in the hope that it will be useful, but WITHOUT ANY
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−# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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−# A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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−# details.
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−#
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−# You should have received a copy of the GNU Lesser General Public License along
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−# with yams. If not, see <http://www.gnu.org/licenses/>.
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−from yams.buildobjs import (EntityType, RelationType, RelationDefinition,
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−                            SubjectRelation, Int, String,  Boolean)
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−from yams.constraints import SizeConstraint, UniqueConstraint
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−
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−from __init__ import RESTRICTED_RTYPE_PERMS
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−
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−class State(EntityType):
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−    """used to associate simple states to an entity
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−    type and/or to define workflows
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−    """
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−    __permissions__ = {
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−        'read':   ('managers', 'users', 'guests',),
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−        'add':    ('managers', 'users',),
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−        'delete': ('managers', 'owners',),
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−        'update': ('managers', 'owners',),
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−        }
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−
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−    # attributes
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−    eid = Int(required=True, uid=True)
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−    name = String(required=True,
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−                  indexed=True, internationalizable=True,
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−                  constraints=[SizeConstraint(256)])
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−    description = String(fulltextindexed=True)
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−    # relations
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−    state_of = SubjectRelation('Eetype', cardinality='+*')
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−    next_state = SubjectRelation('State', cardinality='**')
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−
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−
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−class state_of(RelationType):
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−    """link a state to one or more entity type"""
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−    __permissions__ = RESTRICTED_RTYPE_PERMS
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−
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−class next_state(RelationType):
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−    """define a workflow by associating a state to possible following states
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−    """
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−    __permissions__ = RESTRICTED_RTYPE_PERMS
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−
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−class initial_state(RelationType):
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−    """indicate which state should be used by default when an entity using states
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−    is created
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−    """
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−    __permissions__ = {
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−        'read':   ('managers', 'users', 'guests',),
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−        'add':    ('managers', 'users',),
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−        'delete': ('managers', 'users',),
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−        }
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−    subject = 'Eetype'
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−    object = 'State'
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−    cardinality = '?*'
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−    inlined = True
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−
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−class Eetype(EntityType):
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−    """define an entity type, used to build the application schema"""
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−    __permissions__ = {
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−        'read':   ('managers', 'users', 'guests',),
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−        'add':    ('managers',),
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−        'delete': ('managers',),
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−        'update': ('managers', 'owners',),
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−        }
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−    name = String(required=True, indexed=True, internationalizable=True,
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−                  constraints=[UniqueConstraint(), SizeConstraint(64)])
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−    description = String(fulltextindexed=True)
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−    meta = Boolean()
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−    final = Boolean()