-- This file is part of Liberty Eiffel.
--
-- Liberty Eiffel 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, version 3 of the License.
--
-- Liberty Eiffel 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 Liberty Eiffel.  If not, see <http://www.gnu.org/licenses/>.
--
class LIBERTY_ETC_NEEDS

create {LIBERTY_ETC_VISITOR_IMPL}
   make

feature {ANY}
   cluster: LIBERTY_ETC_CLUSTER

feature {LIBERTY_ETC_CLUSTER}
   check_validity (all_clusters: MAP[LIBERTY_ETC_CLUSTER, FIXED_STRING]) is
      require
         all_clusters /= Void
      do
         if cluster = Void then
            cluster := all_clusters.fast_reference_at(cluster_name)
            if cluster = Void then
               std_error.put_line("Unknown cluster: " + cluster_name)
               die_with_code(1)
            end
         else
            check
               cluster = all_clusters.fast_at(cluster_name)
            end
         end
         constraints.do_all(agent {LIBERTY_ETC_CONSTRAINT}.check_validity(cluster))
      end

   in_cycle: BOOLEAN

   set_in_cycle is
      do
         in_cycle := True
      ensure
         in_cycle
      end

feature {}
   make (a_cluster_name: like cluster_name; a_cluster: like cluster; a_constraints: like constraints) is
      require
         a_cluster_name /= Void
         a_constraints /= Void
      do
         cluster_name := a_cluster_name
         cluster := a_cluster
         constraints := a_constraints
      ensure
         cluster_name = a_cluster_name
         cluster = a_cluster
         constraints = a_constraints
      end

   cluster_name: FIXED_STRING
   constraints: TRAVERSABLE[LIBERTY_ETC_CONSTRAINT]

invariant
   cluster_name /= Void
   constraints /= Void

end -- class LIBERTY_ETC_NEEDS