NAME Object::Attribute::Cached - cache complex object attributes SYNOPSIS use Object::Attribute::Cached attribute1 => sub { shift->some_complex_task }, squared => sub { shift->{num} ** 2 }, uptosquare => sub { 1 .. shift->squared }, squaredsquared => sub { map $_ ** 2, shift->uptosquare }; DESCRIPTION This provides a simple interface to writing simple caching attribute methods. It avoids having to write code like: sub parsed_query { my $self = shift; $self->{_cached_parsed_query} ||= $self->parse_the_query; return $self->{_cached_parsed_query}; } Instead you can just declare: use Object::Attribute::Cached parsed_query => sub { shift->parse_the_query }; CAVEATS We try to allow an attribute to be a lists or hash and examine caller() to try to do the right thing. This will work for simple cases, but if you're running into problems, or trying to do something more complex, it's always safer to use references instead. AUTHOR Tony Bowden BUGS and QUERIES Please direct all correspondence regarding this module to: bug-Object-Attribute-Cached@rt.cpan.org COPYRIGHT AND LICENSE Copyright (C) 2003-2005 Kasei This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License; either version 2 of the License, or (at your option) any later version. This program 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.