focal (3) TM::Synchronizable::MapSphere.3pm.gz

NAME

       TM::Synchronizable::MapSphere - Topic Maps, trait for a syncing a hierarchical TM repository

SYNOPSIS

          use TM;
          use base qw(TM);
          use Class::Trait ('TM::MapSphere',
                            'TM::Synchronizable::MLDBM' => {
                                exclude => [ "sync_in", "sync_out" ]
                            },
                            'TM::Synchronizable::MapSphere');

DESCRIPTION

       This trait adds "sync_in" and "sync_out" functionality to a map sphere. The point here is that embedded
       child maps are also synced out or in.

   Map Meta Data

INTERFACE

   Methods
       sync_in
           $ms->sync_in ($path)

           A whole subtree of the map repository can be sync'ed in, i.e. synchronized with contents in an
           associated resource. If this method is triggered with a particular path, then the map there will be
           (a) synced in, (b) queried for sub-maps and (c) these sub-maps will be instantiated.  Recursively,
           these submaps will be sync'ed in, etc. All these sub maps will be mounted under this branch of the
           tree.

           When a map is instantiated, its implementation package will be extracted from the parent map using a
           "implementation" characteristic. The resource URL will be determined from one of the subject
           indicators, the base URI will be determined from the subject address of the map topic. If any of
           these are missing, this particular sub-map is ignored.

           Example: Let us assume that a map has a "baseuri" "http://whatever/" and a resource URL
           "http://example.org/here.xtm". It is a materialized map using the XTM driver. If this map is mounted
           into a root map under "/foo/", then the entry will take the form (using AsTMa= 2.0 as notation):

              foo isa topicmap
              ~ http://example.org/here.xtm
              = http://whatever/
              implementation: TM::Materialized::XTM

           @@@ TODO: no path @@@@?

       sync_out
           $ms->sync_out ([ $path ], [ $depth ])

           This method syncs out not only the root map sphere object (at least if the resource "mtime" is
           earlier that any change on the map sphere). The method also consults the mount tab to find child maps
           and will sync them out as well.

           The optional "path" parameter controls which subtree should be synced out. It defaults to "/".

           The optional $depth controls how deep the subtree should be followed downwards. Default is
           "MAX_DEPTH" (see the source).

AUTHOR

       Robert Barta, <drrho@cpan.org>

COPYRIGHT AND LICENSE

       Copyright (C) 200[67] by Robert Barta

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl
       itself, either Perl version 5.8.4 or, at your option, any later version of Perl 5 you may have available.