1 package Moose::Meta::Role::Application::ToClass;
7 use Moose::Util 'english_list';
8 use Scalar::Util 'blessed';
10 our $VERSION = '0.77';
11 $VERSION = eval $VERSION;
12 our $AUTHORITY = 'cpan:STEVAN';
14 use base 'Moose::Meta::Role::Application';
16 __PACKAGE__->meta->add_attribute('role' => (
21 __PACKAGE__->meta->add_attribute('class' => (
23 writer => 'set_class',
27 my ($self, $role, $class) = @_;
29 $self->set_role($role);
30 $self->set_class($class);
32 $self->SUPER::apply($role, $class);
34 $class->add_role($role);
35 $class->add_role_application($self);
38 sub check_role_exclusions {
39 my ($self, $role, $class) = @_;
40 if ($class->excludes_role($role->name)) {
41 $class->throw_error("Conflict detected: " . $class->name . " excludes role '" . $role->name . "'");
43 foreach my $excluded_role_name ($role->get_excluded_roles_list) {
44 if ($class->does_role($excluded_role_name)) {
45 $class->throw_error("The class " . $class->name . " does the excluded role '$excluded_role_name'");
50 sub check_required_methods {
51 my ($self, $role, $class) = @_;
57 # we might need to move this down below the
58 # the attributes so that we can require any
59 # attribute accessors. However I am thinking
60 # that maybe those are somehow exempt from
61 # the require methods stuff.
62 foreach my $required_method_name ($role->get_required_method_list) {
64 if (!$class->find_method_by_name($required_method_name)) {
66 next if $self->is_aliased_method($required_method_name);
68 push @missing, $required_method_name;
72 return unless @missing;
77 my $noun = @missing == 1 ? 'method' : 'methods';
80 = Moose::Util::english_list( map { q{'} . $_ . q{'} } @missing );
85 . "' requires the $noun $list "
86 . "to be implemented by '"
87 . $class->name . q{'};
90 $class->throw_error($error);
93 sub check_required_attributes {
97 sub apply_attributes {
98 my ($self, $role, $class) = @_;
99 foreach my $attribute_name ($role->get_attribute_list) {
100 # it if it has one already
101 if ($class->has_attribute($attribute_name) &&
102 # make sure we haven't seen this one already too
103 $class->get_attribute($attribute_name) != $role->get_attribute($attribute_name)) {
107 $class->add_attribute(
109 $role->get_attribute($attribute_name)
116 my ($self, $role, $class) = @_;
117 foreach my $method_name ($role->get_method_list) {
119 unless ($self->is_method_excluded($method_name)) {
120 # it if it has one already
121 if ($class->has_method($method_name) &&
122 # and if they are not the same thing ...
123 $class->get_method($method_name)->body != $role->get_method($method_name)->body) {
127 # add it, although it could be overridden
130 $role->get_method($method_name)
135 if ($self->is_method_aliased($method_name)) {
136 my $aliased_method_name = $self->get_method_aliases->{$method_name};
137 # it if it has one already
138 if ($class->has_method($aliased_method_name) &&
139 # and if they are not the same thing ...
140 $class->get_method($aliased_method_name)->body != $role->get_method($method_name)->body) {
141 $class->throw_error("Cannot create a method alias if a local method of the same name exists");
144 $aliased_method_name,
145 $role->get_method($method_name)
149 # we must reset the cache here since
150 # we are just aliasing methods, otherwise
151 # the modifiers go wonky.
152 $class->reset_package_cache_flag;
155 sub apply_override_method_modifiers {
156 my ($self, $role, $class) = @_;
157 foreach my $method_name ($role->get_method_modifier_list('override')) {
158 # it if it has one already then ...
159 if ($class->has_method($method_name)) {
163 # if this is not a role, then we need to
164 # find the original package of the method
165 # so that we can tell the class were to
166 # find the right super() method
167 my $method = $role->get_override_method_modifier($method_name);
168 my ($package) = Class::MOP::get_code_info($method);
169 # if it is a class, we just add it
170 $class->add_override_method_modifier($method_name, $method, $package);
175 sub apply_method_modifiers {
176 my ($self, $modifier_type, $role, $class) = @_;
177 my $add = "add_${modifier_type}_method_modifier";
178 my $get = "get_${modifier_type}_method_modifiers";
179 foreach my $method_name ($role->get_method_modifier_list($modifier_type)) {
183 ) foreach $role->$get($method_name);
195 Moose::Meta::Role::Application::ToClass - Compose a role into a class
209 =item B<check_role_exclusions>
211 =item B<check_required_methods>
213 =item B<check_required_attributes>
215 =item B<apply_attributes>
217 =item B<apply_methods>
219 =item B<apply_method_modifiers>
221 =item B<apply_override_method_modifiers>
227 All complex software has bugs lurking in it, and this module is no
228 exception. If you find a bug please either email me, or add the bug
233 Stevan Little E<lt>stevan@iinteractive.comE<gt>
235 =head1 COPYRIGHT AND LICENSE
237 Copyright 2006-2009 by Infinity Interactive, Inc.
239 L<http://www.iinteractive.com>
241 This library is free software; you can redistribute it and/or modify
242 it under the same terms as Perl itself.