1 package Moose::Meta::Role::Application::ToClass;
8 use Scalar::Util 'blessed';
12 our $VERSION = '0.01';
13 our $AUTHORITY = 'cpan:STEVAN';
15 use base 'Moose::Meta::Role::Application';
18 my ($self, $role, $class) = @_;
19 $self->SUPER::apply($role, $class);
20 $class->add_role($role);
23 sub check_role_exclusions {
24 my ($self, $role, $class) = @_;
25 if ($class->excludes_role($role->name)) {
26 confess "Conflict detected: " . $class->name . " excludes role '" . $role->name . "'";
28 foreach my $excluded_role_name ($role->get_excluded_roles_list) {
29 if ($class->does_role($excluded_role_name)) {
30 confess "The class " . $class->name . " does the excluded role '$excluded_role_name'";
35 sub check_required_methods {
36 my ($self, $role, $class) = @_;
38 # we might need to move this down below the
39 # the attributes so that we can require any
40 # attribute accessors. However I am thinking
41 # that maybe those are somehow exempt from
42 # the require methods stuff.
43 foreach my $required_method_name ($role->get_required_method_list) {
45 if (!$class->find_method_by_name($required_method_name)) {
47 next if $self->is_aliased_method($required_method_name);
49 confess "'" . $role->name . "' requires the method '$required_method_name' " .
50 "to be implemented by '" . $class->name . "'";
54 # we need to make sure that the method is
55 # not a method modifier, because those do
56 # not satisfy the requirements ...
57 my $method = $class->find_method_by_name($required_method_name);
59 # check if it is a generated accessor ...
60 (!$method->isa('Class::MOP::Method::Accessor'))
61 || confess "'" . $role->name . "' requires the method '$required_method_name' " .
62 "to be implemented by '" . $class->name . "', the method is only an attribute accessor";
65 # All other tests here have been removed, they were tests
66 # for overriden methods and before/after/around modifiers.
67 # But we realized that for classes any overriden or modified
68 # methods would be backed by a real method of that name
69 # (and therefore meet the requirement). And for roles, the
70 # overriden and modified methods are "in statis" and so would
71 # not show up in this test anyway (and as a side-effect they
72 # would not fufill the requirement, which is exactly what we
73 # want them to do anyway).
79 sub check_required_attributes {
83 sub apply_attributes {
84 my ($self, $role, $class) = @_;
85 foreach my $attribute_name ($role->get_attribute_list) {
86 # it if it has one already
87 if ($class->has_attribute($attribute_name) &&
88 # make sure we haven't seen this one already too
89 $class->get_attribute($attribute_name) != $role->get_attribute($attribute_name)) {
93 $class->add_attribute(
95 $role->get_attribute($attribute_name)
102 my ($self, $role, $class) = @_;
103 foreach my $method_name ($role->get_method_list) {
105 next if $self->is_method_excluded($method_name);
107 # it if it has one already
108 if ($class->has_method($method_name) &&
109 # and if they are not the same thing ...
110 $class->get_method($method_name)->body != $role->get_method($method_name)->body) {
115 # add it, although it could be overriden
116 $class->alias_method(
118 $role->get_method($method_name)
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";
130 $class->alias_method(
131 $aliased_method_name,
132 $role->get_method($method_name)
136 # we must reset the cache here since
137 # we are just aliasing methods, otherwise
138 # the modifiers go wonky.
139 $class->reset_package_cache_flag;
142 sub apply_override_method_modifiers {
143 my ($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)) {
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, $package);
162 sub apply_method_modifiers {
163 my ($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)) {
170 ) foreach $role->$get($method_name);
182 Moose::Meta::Role::Application::ToClass - Compose a role into a class
196 =item B<check_role_exclusions>
198 =item B<check_required_methods>
200 =item B<check_required_attributes>
202 =item B<apply_attributes>
204 =item B<apply_methods>
206 =item B<apply_method_modifiers>
208 =item B<apply_override_method_modifiers>
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
220 Stevan Little E<lt>stevan@iinteractive.comE<gt>
222 =head1 COPYRIGHT AND LICENSE
224 Copyright 2006-2008 by Infinity Interactive, Inc.
226 L<http://www.iinteractive.com>
228 This library is free software; you can redistribute it and/or modify
229 it under the same terms as Perl itself.