Commit | Line | Data |
c0e30cf5 |
1 | |
2 | package Moose::Meta::Class; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
648e79ae |
7 | use Class::MOP; |
8 | |
6ba6d68c |
9 | use Carp 'confess'; |
54b1cdf0 |
10 | use Scalar::Util 'weaken', 'blessed', 'reftype'; |
a15dff8d |
11 | |
db1ab48d |
12 | our $VERSION = '0.06'; |
bc1e29b5 |
13 | |
c0e30cf5 |
14 | use base 'Class::MOP::Class'; |
15 | |
598340d5 |
16 | __PACKAGE__->meta->add_attribute('roles' => ( |
ef333f17 |
17 | reader => 'roles', |
18 | default => sub { [] } |
19 | )); |
20 | |
590868a3 |
21 | sub initialize { |
22 | my $class = shift; |
23 | my $pkg = shift; |
24 | $class->SUPER::initialize($pkg, |
25 | ':attribute_metaclass' => 'Moose::Meta::Attribute', |
ddd0ec20 |
26 | ':instance_metaclass' => 'Moose::Meta::Instance', |
590868a3 |
27 | @_); |
28 | } |
29 | |
ef333f17 |
30 | sub add_role { |
31 | my ($self, $role) = @_; |
32 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
33 | || confess "Roles must be instances of Moose::Meta::Role"; |
34 | push @{$self->roles} => $role; |
35 | } |
36 | |
37 | sub does_role { |
38 | my ($self, $role_name) = @_; |
39 | (defined $role_name) |
40 | || confess "You must supply a role name to look for"; |
9c429218 |
41 | foreach my $class ($self->class_precedence_list) { |
42 | foreach my $role (@{$class->meta->roles}) { |
43 | return 1 if $role->does_role($role_name); |
44 | } |
ef333f17 |
45 | } |
46 | return 0; |
47 | } |
48 | |
d79e62fd |
49 | sub excludes_role { |
50 | my ($self, $role_name) = @_; |
51 | (defined $role_name) |
52 | || confess "You must supply a role name to look for"; |
9c429218 |
53 | foreach my $class ($self->class_precedence_list) { |
54 | foreach my $role (@{$class->meta->roles}) { |
55 | return 1 if $role->excludes_role($role_name); |
56 | } |
d79e62fd |
57 | } |
58 | return 0; |
59 | } |
60 | |
8c9d74e7 |
61 | sub new_object { |
62 | my ($class, %params) = @_; |
63 | my $self = $class->SUPER::new_object(%params); |
64 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
5faf11bb |
65 | next unless $params{$attr->init_arg} && $attr->can('has_trigger') && $attr->has_trigger; |
66 | $attr->trigger->($self, $params{$attr->init_arg}, $attr); |
8c9d74e7 |
67 | } |
68 | return $self; |
69 | } |
70 | |
a15dff8d |
71 | sub construct_instance { |
72 | my ($class, %params) = @_; |
ddd0ec20 |
73 | my $meta_instance = $class->get_meta_instance; |
575db57d |
74 | # FIXME: |
75 | # the code below is almost certainly incorrect |
76 | # but this is foreign inheritence, so we might |
77 | # have to kludge it in the end. |
ddd0ec20 |
78 | my $instance = $params{'__INSTANCE__'} || $meta_instance->create_instance(); |
a15dff8d |
79 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
ddd0ec20 |
80 | $attr->initialize_instance_slot($meta_instance, $instance, \%params) |
a15dff8d |
81 | } |
82 | return $instance; |
83 | } |
84 | |
a7d0cd00 |
85 | sub has_method { |
86 | my ($self, $method_name) = @_; |
87 | (defined $method_name && $method_name) |
88 | || confess "You must define a method name"; |
89 | |
90 | my $sub_name = ($self->name . '::' . $method_name); |
91 | |
92 | no strict 'refs'; |
93 | return 0 if !defined(&{$sub_name}); |
94 | my $method = \&{$sub_name}; |
95 | |
96 | return 1 if blessed($method) && $method->isa('Moose::Meta::Role::Method'); |
97 | return $self->SUPER::has_method($method_name); |
98 | } |
99 | |
78cd1d3b |
100 | sub add_override_method_modifier { |
101 | my ($self, $name, $method, $_super_package) = @_; |
d05cd563 |
102 | (!$self->has_method($name)) |
103 | || confess "Cannot add an override method if a local method is already present"; |
78cd1d3b |
104 | # need this for roles ... |
105 | $_super_package ||= $self->name; |
106 | my $super = $self->find_next_method_by_name($name); |
107 | (defined $super) |
108 | || confess "You cannot override '$name' because it has no super method"; |
05d9eaf6 |
109 | $self->add_method($name => bless sub { |
78cd1d3b |
110 | my @args = @_; |
111 | no strict 'refs'; |
112 | no warnings 'redefine'; |
113 | local *{$_super_package . '::super'} = sub { $super->(@args) }; |
114 | return $method->(@args); |
05d9eaf6 |
115 | } => 'Moose::Meta::Method::Overriden'); |
78cd1d3b |
116 | } |
117 | |
118 | sub add_augment_method_modifier { |
05d9eaf6 |
119 | my ($self, $name, $method) = @_; |
d05cd563 |
120 | (!$self->has_method($name)) |
121 | || confess "Cannot add an augment method if a local method is already present"; |
78cd1d3b |
122 | my $super = $self->find_next_method_by_name($name); |
123 | (defined $super) |
05d9eaf6 |
124 | || confess "You cannot augment '$name' because it has no super method"; |
125 | my $_super_package = $super->package_name; |
126 | # BUT!,... if this is an overriden method .... |
127 | if ($super->isa('Moose::Meta::Method::Overriden')) { |
128 | # we need to be sure that we actually |
129 | # find the next method, which is not |
130 | # an 'override' method, the reason is |
131 | # that an 'override' method will not |
132 | # be the one calling inner() |
133 | my $real_super = $self->_find_next_method_by_name_which_is_not_overridden($name); |
134 | $_super_package = $real_super->package_name; |
135 | } |
78cd1d3b |
136 | $self->add_method($name => sub { |
137 | my @args = @_; |
138 | no strict 'refs'; |
139 | no warnings 'redefine'; |
05d9eaf6 |
140 | local *{$_super_package . '::inner'} = sub { $method->(@args) }; |
78cd1d3b |
141 | return $super->(@args); |
142 | }); |
143 | } |
144 | |
05d9eaf6 |
145 | sub _find_next_method_by_name_which_is_not_overridden { |
146 | my ($self, $name) = @_; |
147 | my @methods = $self->find_all_methods_by_name($name); |
148 | foreach my $method (@methods) { |
149 | return $method->{code} |
150 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overriden'); |
151 | } |
152 | return undef; |
153 | } |
154 | |
155 | package Moose::Meta::Method::Overriden; |
156 | |
157 | use strict; |
158 | use warnings; |
159 | |
160 | our $VERSION = '0.01'; |
161 | |
162 | use base 'Class::MOP::Method'; |
163 | |
c0e30cf5 |
164 | 1; |
165 | |
166 | __END__ |
167 | |
168 | =pod |
169 | |
170 | =head1 NAME |
171 | |
e522431d |
172 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
173 | |
c0e30cf5 |
174 | =head1 DESCRIPTION |
175 | |
e522431d |
176 | This is a subclass of L<Class::MOP::Class> with Moose specific |
177 | extensions. |
178 | |
6ba6d68c |
179 | For the most part, the only time you will ever encounter an |
180 | instance of this class is if you are doing some serious deep |
181 | introspection. To really understand this class, you need to refer |
182 | to the L<Class::MOP::Class> documentation. |
183 | |
c0e30cf5 |
184 | =head1 METHODS |
185 | |
186 | =over 4 |
187 | |
590868a3 |
188 | =item B<initialize> |
189 | |
8c9d74e7 |
190 | =item B<new_object> |
191 | |
02a0fb52 |
192 | We override this method to support the C<trigger> attribute option. |
193 | |
a15dff8d |
194 | =item B<construct_instance> |
195 | |
6ba6d68c |
196 | This provides some Moose specific extensions to this method, you |
197 | almost never call this method directly unless you really know what |
198 | you are doing. |
199 | |
200 | This method makes sure to handle the moose weak-ref, type-constraint |
201 | and type coercion features. |
ef1d5f4b |
202 | |
e9ec68d6 |
203 | =item B<has_method ($name)> |
204 | |
205 | This accomidates Moose::Meta::Role::Method instances, which are |
206 | aliased, instead of added, but still need to be counted as valid |
207 | methods. |
208 | |
78cd1d3b |
209 | =item B<add_override_method_modifier ($name, $method)> |
210 | |
02a0fb52 |
211 | This will create an C<override> method modifier for you, and install |
212 | it in the package. |
213 | |
78cd1d3b |
214 | =item B<add_augment_method_modifier ($name, $method)> |
215 | |
02a0fb52 |
216 | This will create an C<augment> method modifier for you, and install |
217 | it in the package. |
218 | |
ef333f17 |
219 | =item B<roles> |
220 | |
02a0fb52 |
221 | This will return an array of C<Moose::Meta::Role> instances which are |
222 | attached to this class. |
223 | |
ef333f17 |
224 | =item B<add_role ($role)> |
225 | |
02a0fb52 |
226 | This takes an instance of C<Moose::Meta::Role> in C<$role>, and adds it |
227 | to the list of associated roles. |
228 | |
ef333f17 |
229 | =item B<does_role ($role_name)> |
230 | |
02a0fb52 |
231 | This will test if this class C<does> a given C<$role_name>. It will |
232 | not only check it's local roles, but ask them as well in order to |
233 | cascade down the role hierarchy. |
234 | |
d79e62fd |
235 | =item B<excludes_role ($role_name)> |
236 | |
237 | This will test if this class C<excludes> a given C<$role_name>. It will |
238 | not only check it's local roles, but ask them as well in order to |
239 | cascade down the role hierarchy. |
240 | |
4e848edb |
241 | =item B<add_attribute $attr_name, %params> |
242 | |
243 | This method does the same thing as L<Class::MOP::Class/add_attribute>, but adds |
244 | suport for delegation. |
245 | |
246 | =back |
247 | |
248 | =head1 INTERNAL METHODS |
249 | |
250 | =over 4 |
251 | |
252 | =item compute_delegation |
253 | |
254 | =item generate_delegation_list |
255 | |
256 | =item generate_delgate_method |
257 | |
258 | =item get_delegatable_methods |
259 | |
ac1ef2f9 |
260 | =item filter_delegations |
261 | |
c0e30cf5 |
262 | =back |
263 | |
264 | =head1 BUGS |
265 | |
266 | All complex software has bugs lurking in it, and this module is no |
267 | exception. If you find a bug please either email me, or add the bug |
268 | to cpan-RT. |
269 | |
c0e30cf5 |
270 | =head1 AUTHOR |
271 | |
272 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
273 | |
274 | =head1 COPYRIGHT AND LICENSE |
275 | |
276 | Copyright 2006 by Infinity Interactive, Inc. |
277 | |
278 | L<http://www.iinteractive.com> |
279 | |
280 | This library is free software; you can redistribute it and/or modify |
281 | it under the same terms as Perl itself. |
282 | |
8a7a9c53 |
283 | =cut |
1a563243 |
284 | |