-- Copyright 2003, Trustees of Indiana University
-- Please see the license in the file ../LICENSE

class ADJ_LIST_VERTEX_ITERATOR

inherit JITERATOR[INTEGER]

   create make_from_adjacency_list_impl

feature {NONE}
-- vertex_iter : LINEAR_ITERATOR[LINKED_LIST[INTEGER]]
   current_index : INTEGER
   container : ARRAYED_LIST[LINKED_LIST[INTEGER]]

feature {ADJACENCY_LIST}
   make_from_adjacency_list_impl (a: ARRAYED_LIST[LINKED_LIST[INTEGER]])
      is
      do
         container := a
      end

feature -- Access
-- sequence_is_empty : BOOLEAN
   
   start is
      do
         current_index := 0
      end

   item: INTEGER is
--    require else
--       current_index < container.count
      do
         Result := current_index
      end

   off : BOOLEAN is
      do
         Result := current_index >= container.count 
      end

   forth is
      do
         current_index := current_index + 1
      end
end -- ADJ_LIST_VERTEX_ITERATOR