perl-Data-Hierarchy

the Data::Hierarchy manpage provides a simple interface for manipulating
inheritable data attached to a hierarchical environment (like a
filesystem).
One use of the Data::Hierarchy manpage is to allow an application to
annotate paths in a real filesystem in a single compact data structure.
However, the hierarchy does not actually need to correspond to an actual
filesystem.
Paths in a hierarchy are referred to in a Unix-like syntax; '"/"' is the
root "directory". (You can specify a different separator character than the
slash when you construct a Data::Hierarchy object.) With the exception of
the root path, paths should never contain trailing slashes. You can
associate properties, which are arbitrary name/value pairs, with any path.
(Properties cannot contain the undefined value.) By default, properties are
inherited by child paths: thus, if you store some data at '/some/path':
$tree->store('/some/path', {color => 'red'});


you can fetch it again at a '/some/path/below/that':
print $tree->get('/some/path/below/that')->{'color'};



On the other hand, properties whose names begin with dots are uninherited,
or "sticky":
$tree->store('/some/path', {'.color' => 'blue'});
print $tree->get('/some/path')->{'.color'};            # prints blue
print $tree->get('/some/path/below/that')->{'.color'}; # undefined


Note that you do not need to (and in fact, cannot) explicitly add "files"
or "directories" to the hierarchy; you simply add and delete properties to
paths.

          

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License: Artistic-1.0 or GPL-1.0+
URL: http://search.cpan.org/dist/Data-Hierarchy/