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1 | package Moose::Meta::Role::Application::ToClass; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use metaclass; |
6 | |
7 | use Carp 'confess'; |
8 | use Scalar::Util 'blessed'; |
9 | |
10 | use Data::Dumper; |
11 | |
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12 | our $VERSION = '0.55_02'; |
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13 | $VERSION = eval $VERSION; |
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14 | our $AUTHORITY = 'cpan:STEVAN'; |
15 | |
16 | use base 'Moose::Meta::Role::Application'; |
17 | |
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18 | sub apply { |
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19 | my ($self, $role, $class) = @_; |
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20 | $self->SUPER::apply($role, $class); |
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21 | $class->add_role($role); |
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22 | } |
23 | |
24 | sub check_role_exclusions { |
25 | my ($self, $role, $class) = @_; |
26 | if ($class->excludes_role($role->name)) { |
27 | confess "Conflict detected: " . $class->name . " excludes role '" . $role->name . "'"; |
28 | } |
29 | foreach my $excluded_role_name ($role->get_excluded_roles_list) { |
30 | if ($class->does_role($excluded_role_name)) { |
31 | confess "The class " . $class->name . " does the excluded role '$excluded_role_name'"; |
32 | } |
33 | } |
34 | } |
35 | |
36 | sub check_required_methods { |
37 | my ($self, $role, $class) = @_; |
38 | # NOTE: |
39 | # we might need to move this down below the |
40 | # the attributes so that we can require any |
41 | # attribute accessors. However I am thinking |
42 | # that maybe those are somehow exempt from |
43 | # the require methods stuff. |
44 | foreach my $required_method_name ($role->get_required_method_list) { |
45 | |
3e19778d |
46 | if (!$class->find_method_by_name($required_method_name)) { |
47 | |
48 | next if $self->is_aliased_method($required_method_name); |
49 | |
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50 | confess "'" . $role->name . "' requires the method '$required_method_name' " . |
51 | "to be implemented by '" . $class->name . "'"; |
52 | } |
53 | else { |
54 | # NOTE: |
55 | # we need to make sure that the method is |
56 | # not a method modifier, because those do |
57 | # not satisfy the requirements ... |
58 | my $method = $class->find_method_by_name($required_method_name); |
59 | |
60 | # check if it is a generated accessor ... |
61 | (!$method->isa('Class::MOP::Method::Accessor')) |
62 | || confess "'" . $role->name . "' requires the method '$required_method_name' " . |
63 | "to be implemented by '" . $class->name . "', the method is only an attribute accessor"; |
64 | |
65 | # NOTE: |
66 | # All other tests here have been removed, they were tests |
67 | # for overriden methods and before/after/around modifiers. |
68 | # But we realized that for classes any overriden or modified |
69 | # methods would be backed by a real method of that name |
70 | # (and therefore meet the requirement). And for roles, the |
71 | # overriden and modified methods are "in statis" and so would |
72 | # not show up in this test anyway (and as a side-effect they |
73 | # would not fufill the requirement, which is exactly what we |
74 | # want them to do anyway). |
75 | # - SL |
76 | } |
77 | } |
78 | } |
79 | |
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80 | sub check_required_attributes { |
81 | |
82 | } |
83 | |
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84 | sub apply_attributes { |
85 | my ($self, $role, $class) = @_; |
86 | foreach my $attribute_name ($role->get_attribute_list) { |
87 | # it if it has one already |
88 | if ($class->has_attribute($attribute_name) && |
89 | # make sure we haven't seen this one already too |
90 | $class->get_attribute($attribute_name) != $role->get_attribute($attribute_name)) { |
91 | next; |
92 | } |
93 | else { |
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94 | $class->add_attribute( |
95 | $attribute_name, |
96 | $role->get_attribute($attribute_name) |
97 | ); |
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98 | } |
99 | } |
100 | } |
101 | |
102 | sub apply_methods { |
103 | my ($self, $role, $class) = @_; |
104 | foreach my $method_name ($role->get_method_list) { |
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105 | |
106 | next if $self->is_method_excluded($method_name); |
107 | |
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108 | # it if it has one already |
109 | if ($class->has_method($method_name) && |
110 | # and if they are not the same thing ... |
111 | $class->get_method($method_name)->body != $role->get_method($method_name)->body) { |
112 | next; |
113 | } |
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114 | else { |
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115 | # add it, although it could be overriden |
116 | $class->alias_method( |
117 | $method_name, |
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118 | $role->get_method($method_name) |
119 | ); |
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120 | } |
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121 | |
122 | if ($self->is_method_aliased($method_name)) { |
123 | my $aliased_method_name = $self->get_method_aliases->{$method_name}; |
124 | # it if it has one already |
125 | if ($class->has_method($aliased_method_name) && |
126 | # and if they are not the same thing ... |
127 | $class->get_method($aliased_method_name)->body != $role->get_method($method_name)->body) { |
128 | confess "Cannot create a method alias if a local method of the same name exists"; |
129 | } |
130 | $class->alias_method( |
131 | $aliased_method_name, |
132 | $role->get_method($method_name) |
133 | ); |
134 | } |
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135 | } |
136 | # we must reset the cache here since |
137 | # we are just aliasing methods, otherwise |
138 | # the modifiers go wonky. |
139 | $class->reset_package_cache_flag; |
140 | } |
141 | |
142 | sub apply_override_method_modifiers { |
143 | my ($self, $role, $class) = @_; |
144 | foreach my $method_name ($role->get_method_modifier_list('override')) { |
145 | # it if it has one already then ... |
146 | if ($class->has_method($method_name)) { |
147 | next; |
148 | } |
149 | else { |
150 | # if this is not a role, then we need to |
151 | # find the original package of the method |
152 | # so that we can tell the class were to |
153 | # find the right super() method |
154 | my $method = $role->get_override_method_modifier($method_name); |
155 | my ($package) = Class::MOP::get_code_info($method); |
156 | # if it is a class, we just add it |
157 | $class->add_override_method_modifier($method_name, $method, $package); |
158 | } |
159 | } |
160 | } |
161 | |
162 | sub apply_method_modifiers { |
163 | my ($self, $modifier_type, $role, $class) = @_; |
164 | my $add = "add_${modifier_type}_method_modifier"; |
165 | my $get = "get_${modifier_type}_method_modifiers"; |
166 | foreach my $method_name ($role->get_method_modifier_list($modifier_type)) { |
167 | $class->$add( |
168 | $method_name, |
169 | $_ |
170 | ) foreach $role->$get($method_name); |
171 | } |
172 | } |
173 | |
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174 | 1; |
175 | |
176 | __END__ |
177 | |
178 | =pod |
179 | |
180 | =head1 NAME |
181 | |
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182 | Moose::Meta::Role::Application::ToClass - Compose a role into a class |
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183 | |
184 | =head1 DESCRIPTION |
185 | |
186 | =head2 METHODS |
187 | |
188 | =over 4 |
189 | |
190 | =item B<new> |
191 | |
192 | =item B<meta> |
193 | |
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194 | =item B<apply> |
195 | |
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196 | =item B<check_role_exclusions> |
197 | |
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198 | =item B<check_required_methods> |
199 | |
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200 | =item B<check_required_attributes> |
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201 | |
202 | =item B<apply_attributes> |
203 | |
204 | =item B<apply_methods> |
205 | |
206 | =item B<apply_method_modifiers> |
207 | |
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208 | =item B<apply_override_method_modifiers> |
209 | |
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210 | =back |
211 | |
212 | =head1 BUGS |
213 | |
214 | All complex software has bugs lurking in it, and this module is no |
215 | exception. If you find a bug please either email me, or add the bug |
216 | to cpan-RT. |
217 | |
218 | =head1 AUTHOR |
219 | |
220 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
221 | |
222 | =head1 COPYRIGHT AND LICENSE |
223 | |
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224 | Copyright 2006-2008 by Infinity Interactive, Inc. |
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225 | |
226 | L<http://www.iinteractive.com> |
227 | |
228 | This library is free software; you can redistribute it and/or modify |
229 | it under the same terms as Perl itself. |
230 | |
231 | =cut |
232 | |