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1 | package Moose::Meta::Role::Composite; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use metaclass; |
6 | |
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7 | use Scalar::Util 'blessed'; |
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8 | |
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9 | our $VERSION = '0.77'; |
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10 | $VERSION = eval $VERSION; |
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11 | our $AUTHORITY = 'cpan:STEVAN'; |
12 | |
13 | use base 'Moose::Meta::Role'; |
14 | |
15 | # NOTE: |
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16 | # we need to override the ->name |
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17 | # method from Class::MOP::Package |
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18 | # since we don't have an actual |
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19 | # package for this. |
20 | # - SL |
21 | __PACKAGE__->meta->add_attribute('name' => (reader => 'name')); |
22 | |
23 | # NOTE: |
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24 | # Again, since we don't have a real |
25 | # package to store our methods in, |
26 | # we use a HASH ref instead. |
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27 | # - SL |
28 | __PACKAGE__->meta->add_attribute('methods' => ( |
29 | reader => 'get_method_map', |
30 | default => sub { {} } |
31 | )); |
32 | |
33 | sub new { |
34 | my ($class, %params) = @_; |
35 | # the roles param is required ... |
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36 | foreach ( @{$params{roles}} ) { |
37 | unless ( $_->isa('Moose::Meta::Role') ) { |
38 | require Moose; |
39 | Moose->throw_error("The list of roles must be instances of Moose::Meta::Role, not $_"); |
40 | } |
41 | } |
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42 | # and the name is created from the |
43 | # roles if one has not been provided |
44 | $params{name} ||= (join "|" => map { $_->name } @{$params{roles}}); |
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45 | $class->_new(\%params); |
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46 | } |
47 | |
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48 | # This is largely a cope of what's in Moose::Meta::Role (itself |
49 | # largely a copy of Class::MOP::Class). However, we can't actually |
50 | # call add_package_symbol, because there's no package to which which |
51 | # add the symbol. |
52 | sub add_method { |
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53 | my ($self, $method_name, $method) = @_; |
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54 | |
55 | unless ( defined $method_name && $method_name ) { |
56 | Moose->throw_error("You must define a method name"); |
57 | } |
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58 | |
59 | my $body; |
60 | if (blessed($method)) { |
61 | $body = $method->body; |
62 | if ($method->package_name ne $self->name) { |
63 | $method = $method->clone( |
64 | package_name => $self->name, |
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65 | name => $method_name |
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66 | ) if $method->can('clone'); |
67 | } |
68 | } |
69 | else { |
70 | $body = $method; |
71 | $method = $self->wrap_method_body( body => $body, name => $method_name ); |
72 | } |
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73 | |
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74 | $self->get_method_map->{$method_name} = $method; |
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75 | } |
76 | |
77 | 1; |
78 | |
79 | __END__ |
80 | |
81 | =pod |
82 | |
83 | =head1 NAME |
84 | |
85 | Moose::Meta::Role::Composite - An object to represent the set of roles |
86 | |
87 | =head1 DESCRIPTION |
88 | |
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89 | A composite is a role that consists of a set of two or more roles. |
90 | |
91 | The API of a composite role is almost identical to that of a regular |
92 | role. |
93 | |
94 | =head1 INHERITANCE |
95 | |
96 | C<Moose::Meta::Role::Composite> is a subclass of L<Moose::Meta::Role>. |
97 | |
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98 | =head2 METHODS |
99 | |
100 | =over 4 |
101 | |
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102 | =item B<< Moose::Meta::Role::Composite->new(%options) >> |
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103 | |
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104 | This returns a new composite role object. It accepts the same |
105 | options as its parent class, with a few changes: |
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106 | |
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107 | =over 8 |
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108 | |
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109 | =item * roles |
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110 | |
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111 | This option is an array reference containing a list of |
112 | L<Moose::Meta::Role> object. This is a required option. |
113 | |
114 | =item * name |
115 | |
116 | If a name is not given, one is generated from the roles provided. |
117 | |
118 | =back |
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119 | |
120 | =back |
121 | |
122 | =head1 BUGS |
123 | |
124 | All complex software has bugs lurking in it, and this module is no |
125 | exception. If you find a bug please either email me, or add the bug |
126 | to cpan-RT. |
127 | |
128 | =head1 AUTHOR |
129 | |
130 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
131 | |
132 | =head1 COPYRIGHT AND LICENSE |
133 | |
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134 | Copyright 2006-2009 by Infinity Interactive, Inc. |
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135 | |
136 | L<http://www.iinteractive.com> |
137 | |
138 | This library is free software; you can redistribute it and/or modify |
139 | it under the same terms as Perl itself. |
140 | |
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141 | =cut |