text: # Copyright (c) 2012 OpenStack, LLC.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #    http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  # implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import sqlalchemy as sa
  from sqlalchemy import orm
  
  from quantum.db import model_base
  
  
  class VlanID(model_base.BASEV2):
      """Represents a vlan_id usage"""
      __tablename__ = 'vlan_ids'
  
      vlan_id = sa.Column(sa.Integer, nullable=False, primary_key=True)
      vlan_used = sa.Column(sa.Boolean, nullable=False)
  
      def __init__(self, vlan_id):
          self.vlan_id = vlan_id
          self.vlan_used = False
  
      def __repr__(self):
          return "<VlanID(%d,%s)>" % (self.vlan_id, self.vlan_used)
  
  
  class VlanBinding(model_base.BASEV2):
      """Represents a binding of vlan_id to network_id"""
      __tablename__ = 'vlan_bindings'
  
      network_id = sa.Column(sa.String(36), sa.ForeignKey('networks.id'),
                             primary_key=True)
      vlan_id = sa.Column(sa.Integer, nullable=False)
  
      def __init__(self, vlan_id, network_id):
          self.vlan_id = vlan_id
          self.network_id = network_id
  
      def __repr__(self):
          return "<VlanBinding(%d,%s)>" % (self.vlan_id, self.network_id)
  