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} = $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');
101 =item B<method_provider>
103 =item B<has_method_provider>
107 =item B<process_options_for_provides>
109 Run before its superclass method.
111 =item B<check_provides_values>
113 Run after its superclass method.
117 =head1 PROVIDED METHODS
119 It is important to note that all those methods do in place
120 modification of the value stored in the attribute.
126 Increments the value stored in this slot by 1.
130 Decrements the value stored in this slot by 1.
134 Resets the value stored in this slot to it's default value.
140 All complex software has bugs lurking in it, and this module is no
141 exception. If you find a bug please either email me, or add the bug
146 Stevan Little E<lt>stevan@iinteractive.comE<gt>
148 =head1 COPYRIGHT AND LICENSE
150 Copyright 2007 by Infinity Interactive, Inc.
152 L<http://www.iinteractive.com>
154 This library is free software; you can redistribute it and/or modify
155 it under the same terms as Perl itself.