package MooseX::AttributeHelpers::Counter;
use Moose;
-our $VERSION = '0.01';
+our $VERSION = '0.03';
our $AUTHORITY = 'cpan:STEVAN';
use MooseX::AttributeHelpers::MethodProvider::Counter;
);
sub helper_type { 'Num' }
+
+before 'process_options_for_provides' => sub {
+ my ($self, $options, $name) = @_;
+
+ # Set some default attribute options here unless already defined
+ if ((my $type = $self->helper_type) && !exists $options->{isa}){
+ $options->{isa} = $type;
+ }
+ $options->{is} = 'ro' unless exists $options->{is};
+ $options->{default} = 0 unless exists $options->{default};
+};
+
+after 'check_provides_values' => sub {
+ my $self = shift;
+ my $provides = $self->provides;
+
+ unless (scalar keys %$provides) {
+ my $method_constructors = $self->method_constructors;
+ my $attr_name = $self->name;
+
+ foreach my $method (keys %$method_constructors) {
+ $provides->{$method} = ($method . '_' . $attr_name);
+ }
+ }
+};
+
no Moose;
# register the alias ...
-package Moose::Meta::Attribute::Custom::Counter;
+package # hide me from search.cpan.org
+ Moose::Meta::Attribute::Custom::Counter;
sub register_implementation { 'MooseX::AttributeHelpers::Counter' }
1;
has 'counter' => (
metaclass => 'Counter',
- is => 'rw',
- isa => 'Int',
+ is => 'ro',
+ isa => 'Num',
default => sub { 0 },
provides => {
inc => 'inc_counter',
dec => 'dec_counter',
+ reset => 'reset_counter',
}
);
This module provides a simple counter attribute, which can be
incremented and decremeneted.
+If your attribute definition does not include any of I<is>, I<isa>,
+I<default> or I<provides> but does use the C<Counter> metaclass,
+then this module applies defaults as in the L</SYNOPSIS>
+above. This allows for a very basic counter definition:
+
+ has 'foo' => (metaclass => 'Counter');
+ $obj->inc_foo;
+
=head1 METHODS
=over 4
+=item B<meta>
+
=item B<method_provider>
=item B<has_method_provider>
=item B<helper_type>
+=item B<process_options_for_provides>
+
+Run before its superclass method.
+
+=item B<check_provides_values>
+
+Run after its superclass method.
+
+=back
+
+=head1 PROVIDED METHODS
+
+It is important to note that all those methods do in place
+modification of the value stored in the attribute.
+
+=over 4
+
+=item I<inc>
+
+Increments the value stored in this slot by 1.
+
+=item I<dec>
+
+Decrements the value stored in this slot by 1.
+
+=item I<reset>
+
+Resets the value stored in this slot to it's default value.
+
=back
=head1 BUGS
=head1 COPYRIGHT AND LICENSE
-Copyright 2007 by Infinity Interactive, Inc.
+Copyright 2007-2008 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
-=cut
\ No newline at end of file
+=cut