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1 | package MooseX::ClassAttribute; |
2 | |
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3 | use strict; |
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4 | use warnings; |
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5 | |
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6 | our $VERSION = '0.07'; |
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7 | our $AUTHORITY = 'cpan:DROLSKY'; |
8 | |
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9 | use Moose (); |
10 | use Moose::Exporter; |
11 | use MooseX::ClassAttribute::Role::Meta::Class; |
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12 | use MooseX::ClassAttribute::Role::Meta::Attribute; |
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13 | |
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14 | Moose::Exporter->setup_import_methods |
15 | ( with_caller => [ 'class_has' ] ); |
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16 | |
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17 | |
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18 | sub init_meta |
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19 | { |
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20 | shift; |
21 | my %p = @_; |
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22 | |
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23 | Moose->init_meta(%p); |
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24 | |
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25 | return |
26 | Moose::Util::MetaRole::apply_metaclass_roles |
27 | ( for_class => $p{for_class}, |
28 | metaclass_roles => [ 'MooseX::ClassAttribute::Role::Meta::Class' ], |
29 | ); |
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30 | } |
31 | |
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32 | sub class_has |
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33 | { |
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34 | my $caller = shift; |
35 | my $name = shift; |
36 | my %options = @_; |
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37 | |
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38 | my $attrs = ref $name eq 'ARRAY' ? $name : [$name]; |
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39 | |
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40 | Class::MOP::Class |
41 | ->initialize($caller) |
42 | ->add_class_attribute( $_, %options ) |
43 | for @{ $attrs }; |
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44 | } |
45 | |
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46 | 1; |
47 | |
48 | __END__ |
49 | |
50 | =pod |
51 | |
52 | =head1 NAME |
53 | |
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54 | MooseX::ClassAttribute - Declare class attributes Moose-style |
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55 | |
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56 | =head1 SYNOPSIS |
57 | |
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58 | package My::Class; |
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59 | |
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60 | use Moose; |
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61 | use MooseX::ClassAttribute; |
62 | |
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63 | class_has 'Cache' => |
64 | ( is => 'rw', |
65 | isa => 'HashRef', |
66 | default => sub { {} }, |
67 | ); |
68 | |
69 | __PACKAGE__->meta()->make_immutable(); |
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70 | |
71 | no Moose; |
72 | no MooseX::ClassAttribute; |
73 | |
74 | # then later ... |
75 | |
76 | My::Class->Cache()->{thing} = ...; |
77 | |
78 | |
79 | =head1 DESCRIPTION |
80 | |
81 | This module allows you to declare class attributes in exactly the same |
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82 | way as object attributes, using C<class_has()> instead of C<has()>. |
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83 | |
84 | You can use any feature of Moose's attribute declarations, including |
85 | overriding a parent's attributes, delegation (C<handles>), and |
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86 | attribute metaclasses, and it should just work. The one exception is |
87 | the "required" flag, which is not allowed for class attributes. |
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88 | |
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89 | The accessor methods for class attribute may be called on the class |
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90 | directly, or on objects of that class. Passing a class attribute to |
91 | the constructor will not set it. |
92 | |
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93 | =head1 FUNCTIONS |
94 | |
95 | This class exports one function when you use it, C<class_has()>. This |
96 | works exactly like Moose's C<has()>, but it declares class attributes. |
97 | |
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98 | One little nit is that if you include C<no Moose> in your class, you |
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99 | won't remove the C<class_has()> function. To do that you must include |
100 | C<no MooseX::ClassAttribute> as well. |
101 | |
102 | =head2 Implementation and Immutability |
103 | |
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104 | This module will add a role to your class's metaclass, See |
105 | L<MooseX::ClassAttribute::Role::Meta::Class> for details. This role |
106 | provides introspection methods for class attributes. |
107 | |
108 | Class attributes themselves do the |
109 | L<MooseX::ClassAttribute::Role::Meta::Attribute> role. |
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110 | |
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111 | There is also a L<MooseX::ClassAttribute::Meta::Method::Accessor> |
112 | which provides part of the inlining implementation for class |
113 | attributes. |
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114 | |
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115 | =head2 Cooperation with Metaclasses and Traits |
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116 | |
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117 | This module should work with most attribute metaclasses and traits, |
118 | but it's possible that conflicts could occur. This module has been |
119 | tested to work with C<MooseX::AttributeHelpers>. |
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120 | |
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121 | =head1 DONATIONS |
122 | |
123 | If you'd like to thank me for the work I've done on this module, |
124 | please consider making a "donation" to me via PayPal. I spend a lot of |
125 | free time creating free software, and would appreciate any support |
126 | you'd care to offer. |
127 | |
128 | Please note that B<I am not suggesting that you must do this> in order |
129 | for me to continue working on this particular software. I will |
130 | continue to do so, inasmuch as I have in the past, for as long as it |
131 | interests me. |
132 | |
133 | Similarly, a donation made in this way will probably not make me work |
134 | on this software much more, unless I get so many donations that I can |
135 | consider working on free software full time, which seems unlikely at |
136 | best. |
137 | |
138 | To donate, log into PayPal and send money to autarch@urth.org or use |
139 | the button on this page: |
140 | L<http://www.urth.org/~autarch/fs-donation.html> |
141 | |
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142 | =head1 AUTHOR |
143 | |
144 | Dave Rolsky, C<< <autarch@urth.org> >> |
145 | |
146 | =head1 BUGS |
147 | |
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148 | Please report any bugs or feature requests to |
149 | C<bug-moosex-classattribute@rt.cpan.org>, or through the web interface |
150 | at L<http://rt.cpan.org>. I will be notified, and then you'll |
151 | automatically be notified of progress on your bug as I make changes. |
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152 | |
153 | =head1 COPYRIGHT & LICENSE |
154 | |
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155 | Copyright 2007-2008 Dave Rolsky, All Rights Reserved. |
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156 | |
157 | This program is free software; you can redistribute it and/or modify |
158 | it under the same terms as Perl itself. |
159 | |
160 | =cut |