2 package MooseX::AttributeHelpers::Counter;
6 our $AUTHORITY = 'cpan:STEVAN';
8 use MooseX::AttributeHelpers::MethodProvider::Counter;
10 extends 'MooseX::AttributeHelpers::Base';
12 has '+method_provider' => (
13 default => 'MooseX::AttributeHelpers::MethodProvider::Counter'
16 sub helper_type { 'Num' }
18 before 'process_options_for_provides' => sub {
19 my ($self, $options, $name) = @_;
21 # Set some default attribute options here unless already defined
22 if (my $type = $self->helper_type && !exists $options->{isa}){
23 $options->{isa} = $self->helper_type;
26 $options->{is} = 'ro' unless exists $options->{is};
27 $options->{default} = 0 unless exists $options->{default};
30 after 'check_provides_values' => sub {
32 my $provides = $self->provides;
34 unless (scalar keys %$provides) {
35 my $method_constructors = $self->method_constructors;
36 my $attr_name = $self->name;
38 foreach my $method (keys %$method_constructors) {
39 $provides->{$method} = ($method . '_' . $attr_name);
46 # register the alias ...
47 package Moose::Meta::Attribute::Custom::Counter;
48 sub register_implementation { 'MooseX::AttributeHelpers::Counter' }
58 MooseX::AttributeHelpers::Counter
64 use MooseX::AttributeHelpers;
67 metaclass => 'Counter',
74 reset => 'reset_counter',
78 my $page = MyHomePage->new();
79 $page->inc_counter; # same as $page->counter($page->counter + 1);
80 $page->dec_counter; # same as $page->counter($page->counter - 1);
84 This module provides a simple counter attribute, which can be
85 incremented and decremeneted.
87 If your attribute definition does not include any of I<is>, I<isa>,
88 I<default> or I<provides> but does use the C<Counter> metaclass,
89 then this module applies defaults as in the L</SYNOPSIS>
90 above. This allows for a very basic counter definition:
92 has 'foo' => (metaclass => 'Counter');
99 =item B<method_provider>
101 =item B<has_method_provider>
105 =item B<process_options_for_provides>
107 Run before its superclass method.
109 =item B<check_provides_values>
111 Run after its superclass method.
115 =head1 PROVIDED METHODS
117 It is important to note that all those methods do in place
118 modification of the value stored in the attribute.
124 Increments the value stored in this slot by 1.
128 Decrements the value stored in this slot by 1.
132 Resets the value stored in this slot to it's default value.
138 All complex software has bugs lurking in it, and this module is no
139 exception. If you find a bug please either email me, or add the bug
144 Stevan Little E<lt>stevan@iinteractive.comE<gt>
146 =head1 COPYRIGHT AND LICENSE
148 Copyright 2007 by Infinity Interactive, Inc.
150 L<http://www.iinteractive.com>
152 This library is free software; you can redistribute it and/or modify
153 it under the same terms as Perl itself.