Remove references to
[gitmo/Moose.git] / lib / Moose / Meta / Role / Application / ToClass.pm
CommitLineData
fb1e11d5 1package Moose::Meta::Role::Application::ToClass;
2
3use strict;
4use warnings;
5use metaclass;
6
7use Carp 'confess';
8use Scalar::Util 'blessed';
9
a7e9b05b 10our $VERSION = '0.55_04';
75b95414 11$VERSION = eval $VERSION;
fb1e11d5 12our $AUTHORITY = 'cpan:STEVAN';
13
14use base 'Moose::Meta::Role::Application';
15
1c9db35c 16sub apply {
c4538447 17 my ($self, $role, $class) = @_;
1c9db35c 18 $self->SUPER::apply($role, $class);
c4538447 19 $class->add_role($role);
1c9db35c 20}
21
22sub check_role_exclusions {
23 my ($self, $role, $class) = @_;
24 if ($class->excludes_role($role->name)) {
25 confess "Conflict detected: " . $class->name . " excludes role '" . $role->name . "'";
26 }
27 foreach my $excluded_role_name ($role->get_excluded_roles_list) {
28 if ($class->does_role($excluded_role_name)) {
29 confess "The class " . $class->name . " does the excluded role '$excluded_role_name'";
30 }
31 }
32}
33
34sub check_required_methods {
35 my ($self, $role, $class) = @_;
36 # NOTE:
37 # we might need to move this down below the
38 # the attributes so that we can require any
39 # attribute accessors. However I am thinking
40 # that maybe those are somehow exempt from
41 # the require methods stuff.
42 foreach my $required_method_name ($role->get_required_method_list) {
43
3e19778d 44 if (!$class->find_method_by_name($required_method_name)) {
45
46 next if $self->is_aliased_method($required_method_name);
47
1c9db35c 48 confess "'" . $role->name . "' requires the method '$required_method_name' " .
49 "to be implemented by '" . $class->name . "'";
50 }
51 else {
52 # NOTE:
53 # we need to make sure that the method is
54 # not a method modifier, because those do
55 # not satisfy the requirements ...
56 my $method = $class->find_method_by_name($required_method_name);
57
58 # check if it is a generated accessor ...
59 (!$method->isa('Class::MOP::Method::Accessor'))
60 || confess "'" . $role->name . "' requires the method '$required_method_name' " .
61 "to be implemented by '" . $class->name . "', the method is only an attribute accessor";
62
63 # NOTE:
64 # All other tests here have been removed, they were tests
65 # for overriden methods and before/after/around modifiers.
66 # But we realized that for classes any overriden or modified
67 # methods would be backed by a real method of that name
68 # (and therefore meet the requirement). And for roles, the
69 # overriden and modified methods are "in statis" and so would
70 # not show up in this test anyway (and as a side-effect they
71 # would not fufill the requirement, which is exactly what we
72 # want them to do anyway).
73 # - SL
74 }
75 }
76}
77
709c321c 78sub check_required_attributes {
79
80}
81
1c9db35c 82sub apply_attributes {
83 my ($self, $role, $class) = @_;
84 foreach my $attribute_name ($role->get_attribute_list) {
85 # it if it has one already
86 if ($class->has_attribute($attribute_name) &&
87 # make sure we haven't seen this one already too
88 $class->get_attribute($attribute_name) != $role->get_attribute($attribute_name)) {
89 next;
90 }
91 else {
d7d8a8c7 92 $class->add_attribute(
93 $attribute_name,
94 $role->get_attribute($attribute_name)
95 );
1c9db35c 96 }
97 }
98}
99
100sub apply_methods {
101 my ($self, $role, $class) = @_;
102 foreach my $method_name ($role->get_method_list) {
c4538447 103
104 next if $self->is_method_excluded($method_name);
105
1c9db35c 106 # it if it has one already
107 if ($class->has_method($method_name) &&
108 # and if they are not the same thing ...
109 $class->get_method($method_name)->body != $role->get_method($method_name)->body) {
110 next;
111 }
620db045 112 else {
1c9db35c 113 # add it, although it could be overriden
114 $class->alias_method(
115 $method_name,
43a41ede 116 $role->get_method($method_name)
117 );
1c9db35c 118 }
43a41ede 119
120 if ($self->is_method_aliased($method_name)) {
121 my $aliased_method_name = $self->get_method_aliases->{$method_name};
122 # it if it has one already
123 if ($class->has_method($aliased_method_name) &&
124 # and if they are not the same thing ...
125 $class->get_method($aliased_method_name)->body != $role->get_method($method_name)->body) {
126 confess "Cannot create a method alias if a local method of the same name exists";
127 }
128 $class->alias_method(
129 $aliased_method_name,
130 $role->get_method($method_name)
131 );
132 }
1c9db35c 133 }
134 # we must reset the cache here since
135 # we are just aliasing methods, otherwise
136 # the modifiers go wonky.
137 $class->reset_package_cache_flag;
138}
139
140sub apply_override_method_modifiers {
141 my ($self, $role, $class) = @_;
142 foreach my $method_name ($role->get_method_modifier_list('override')) {
143 # it if it has one already then ...
144 if ($class->has_method($method_name)) {
145 next;
146 }
147 else {
148 # if this is not a role, then we need to
149 # find the original package of the method
150 # so that we can tell the class were to
151 # find the right super() method
152 my $method = $role->get_override_method_modifier($method_name);
153 my ($package) = Class::MOP::get_code_info($method);
154 # if it is a class, we just add it
155 $class->add_override_method_modifier($method_name, $method, $package);
156 }
157 }
158}
159
160sub apply_method_modifiers {
161 my ($self, $modifier_type, $role, $class) = @_;
162 my $add = "add_${modifier_type}_method_modifier";
163 my $get = "get_${modifier_type}_method_modifiers";
164 foreach my $method_name ($role->get_method_modifier_list($modifier_type)) {
165 $class->$add(
166 $method_name,
167 $_
168 ) foreach $role->$get($method_name);
169 }
170}
171
fb1e11d5 1721;
173
174__END__
175
176=pod
177
178=head1 NAME
179
ab76842e 180Moose::Meta::Role::Application::ToClass - Compose a role into a class
fb1e11d5 181
182=head1 DESCRIPTION
183
184=head2 METHODS
185
186=over 4
187
188=item B<new>
189
190=item B<meta>
191
1c9db35c 192=item B<apply>
193
709c321c 194=item B<check_role_exclusions>
195
1c9db35c 196=item B<check_required_methods>
197
709c321c 198=item B<check_required_attributes>
1c9db35c 199
200=item B<apply_attributes>
201
202=item B<apply_methods>
203
204=item B<apply_method_modifiers>
205
1c9db35c 206=item B<apply_override_method_modifiers>
207
fb1e11d5 208=back
209
210=head1 BUGS
211
212All complex software has bugs lurking in it, and this module is no
213exception. If you find a bug please either email me, or add the bug
214to cpan-RT.
215
216=head1 AUTHOR
217
218Stevan Little E<lt>stevan@iinteractive.comE<gt>
219
220=head1 COPYRIGHT AND LICENSE
221
778db3ac 222Copyright 2006-2008 by Infinity Interactive, Inc.
fb1e11d5 223
224L<http://www.iinteractive.com>
225
226This library is free software; you can redistribute it and/or modify
227it under the same terms as Perl itself.
228
229=cut
230