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);
33 $class->add_role($role);
36 sub check_role_exclusions {
37 my ($self, $role, $class) = @_;
38 if ($class->excludes_role($role->name)) {
39 $class->throw_error("Conflict detected: " . $class->name . " excludes role '" . $role->name . "'");
41 foreach my $excluded_role_name ($role->get_excluded_roles_list) {
42 if ($class->does_role($excluded_role_name)) {
43 $class->throw_error("The class " . $class->name . " does the excluded role '$excluded_role_name'");
48 sub check_required_methods {
49 my ($self, $role, $class) = @_;
55 # we might need to move this down below the
56 # the attributes so that we can require any
57 # attribute accessors. However I am thinking
58 # that maybe those are somehow exempt from
59 # the require methods stuff.
60 foreach my $required_method_name ($role->get_required_method_list) {
62 if (!$class->find_method_by_name($required_method_name)) {
64 next if $self->is_aliased_method($required_method_name);
66 push @missing, $required_method_name;
70 return unless @missing;
75 my $noun = @missing == 1 ? 'method' : 'methods';
78 = Moose::Util::english_list( map { q{'} . $_ . q{'} } @missing );
83 . "' requires the $noun $list "
84 . "to be implemented by '"
85 . $class->name . q{'};
88 $class->throw_error($error);
91 sub check_required_attributes {
95 sub apply_attributes {
96 my ($self, $role, $class) = @_;
97 foreach my $attribute_name ($role->get_attribute_list) {
98 # it if it has one already
99 if ($class->has_attribute($attribute_name) &&
100 # make sure we haven't seen this one already too
101 $class->get_attribute($attribute_name) != $role->get_attribute($attribute_name)) {
105 $class->add_attribute(
107 $role->get_attribute($attribute_name)
114 my ($self, $role, $class) = @_;
115 foreach my $method_name ($role->get_method_list) {
117 unless ($self->is_method_excluded($method_name)) {
118 # it if it has one already
119 if ($class->has_method($method_name) &&
120 # and if they are not the same thing ...
121 $class->get_method($method_name)->body != $role->get_method($method_name)->body) {
125 # add it, although it could be overridden
128 $role->get_method($method_name)
133 if ($self->is_method_aliased($method_name)) {
134 my $aliased_method_name = $self->get_method_aliases->{$method_name};
135 # it if it has one already
136 if ($class->has_method($aliased_method_name) &&
137 # and if they are not the same thing ...
138 $class->get_method($aliased_method_name)->body != $role->get_method($method_name)->body) {
139 $class->throw_error("Cannot create a method alias if a local method of the same name exists");
142 $aliased_method_name,
143 $role->get_method($method_name)
147 # we must reset the cache here since
148 # we are just aliasing methods, otherwise
149 # the modifiers go wonky.
150 $class->reset_package_cache_flag;
153 sub apply_override_method_modifiers {
154 my ($self, $role, $class) = @_;
155 foreach my $method_name ($role->get_method_modifier_list('override')) {
156 # it if it has one already then ...
157 if ($class->has_method($method_name)) {
161 # if this is not a role, then we need to
162 # find the original package of the method
163 # so that we can tell the class were to
164 # find the right super() method
165 my $method = $role->get_override_method_modifier($method_name);
166 my ($package) = Class::MOP::get_code_info($method);
167 # if it is a class, we just add it
168 $class->add_override_method_modifier($method_name, $method, $package);
173 sub apply_method_modifiers {
174 my ($self, $modifier_type, $role, $class) = @_;
175 my $add = "add_${modifier_type}_method_modifier";
176 my $get = "get_${modifier_type}_method_modifiers";
177 foreach my $method_name ($role->get_method_modifier_list($modifier_type)) {
181 ) foreach $role->$get($method_name);
193 Moose::Meta::Role::Application::ToClass - Compose a role into a class
207 =item B<check_role_exclusions>
209 =item B<check_required_methods>
211 =item B<check_required_attributes>
213 =item B<apply_attributes>
215 =item B<apply_methods>
217 =item B<apply_method_modifiers>
219 =item B<apply_override_method_modifiers>
225 All complex software has bugs lurking in it, and this module is no
226 exception. If you find a bug please either email me, or add the bug
231 Stevan Little E<lt>stevan@iinteractive.comE<gt>
233 =head1 COPYRIGHT AND LICENSE
235 Copyright 2006-2009 by Infinity Interactive, Inc.
237 L<http://www.iinteractive.com>
239 This library is free software; you can redistribute it and/or modify
240 it under the same terms as Perl itself.