1 package Moose::Meta::Role::Application::ToClass;
8 use Scalar::Util 'blessed';
12 our $VERSION = '0.55_03';
13 $VERSION = eval $VERSION;
14 our $AUTHORITY = 'cpan:STEVAN';
16 use base 'Moose::Meta::Role::Application';
19 my ($self, $role, $class) = @_;
20 $self->SUPER::apply($role, $class);
21 $class->add_role($role);
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 . "'";
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'";
36 sub check_required_methods {
37 my ($self, $role, $class) = @_;
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) {
46 if (!$class->find_method_by_name($required_method_name)) {
48 next if $self->is_aliased_method($required_method_name);
50 confess "'" . $role->name . "' requires the method '$required_method_name' " .
51 "to be implemented by '" . $class->name . "'";
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);
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 '" . $class->name . "', the method is only an attribute accessor";
66 # All other tests here have been removed, they were tests
67 # for overriden methods and before/after/around modifiers.
68 # But we realized that for classes any overriden or modified
69 # methods would be backed by a real method of that name
70 # (and therefore meet the requirement). And for roles, the
71 # overriden and modified methods are "in statis" and so would
72 # not show up in this test anyway (and as a side-effect they
73 # would not fufill the requirement, which is exactly what we
74 # want them to do anyway).
80 sub check_required_attributes {
84 sub apply_attributes {
85 my ($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)) {
94 $class->add_attribute(
96 $role->get_attribute($attribute_name)
103 my ($self, $role, $class) = @_;
104 foreach my $method_name ($role->get_method_list) {
106 next if $self->is_method_excluded($method_name);
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) {
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.