get_association (OpenID::Store::Filesystem)

    # File lib/openid/store/filesystem.rb, line 80
          def get_association(server_url, handle=nil)
            # the filename with empty handle is the prefix for the associations
            # for a given server url
            filename = get_association_filename(server_url, handle)
            if handle
              return _get_association(filename)
            end
            assoc_filenames = Dir.glob(filename.to_s + '*')

            assocs = assoc_filenames.collect do |f|
              _get_association(f)
            end

            assocs = assocs.find_all { |a| not a.nil? }
            assocs = assocs.sort_by { |a| a.issued }

            return nil if assocs.empty?
            return assocs[-1]
          end