Commit | Line | Data |
e185c027 |
1 | |
2 | package Moose::Meta::Role; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | use metaclass; |
7 | |
21f1e231 |
8 | use Scalar::Util 'blessed'; |
b6a00b82 |
9 | use Carp 'confess'; |
bdabd620 |
10 | |
6302a7e8 |
11 | our $VERSION = '0.73_02'; |
e606ae5f |
12 | $VERSION = eval $VERSION; |
d44714be |
13 | our $AUTHORITY = 'cpan:STEVAN'; |
e185c027 |
14 | |
8ee73eeb |
15 | use Moose::Meta::Class; |
39b3bc94 |
16 | use Moose::Meta::Role::Method; |
d67145ed |
17 | use Moose::Meta::Role::Method::Required; |
8ee73eeb |
18 | |
68efb014 |
19 | use base 'Class::MOP::Module'; |
80572233 |
20 | |
fb1e11d5 |
21 | ## ------------------------------------------------------------------ |
22 | ## NOTE: |
23 | ## I normally don't do this, but I am doing |
24 | ## a whole bunch of meta-programmin in this |
25 | ## module, so it just makes sense. For a clearer |
26 | ## picture of what is going on in the next |
27 | ## several lines of code, look at the really |
28 | ## big comment at the end of this file (right |
29 | ## before the POD). |
30 | ## - SL |
31 | ## ------------------------------------------------------------------ |
80572233 |
32 | |
21716c07 |
33 | my $META = __PACKAGE__->meta; |
34 | |
35 | ## ------------------------------------------------------------------ |
36 | ## attributes ... |
e185c027 |
37 | |
21716c07 |
38 | # NOTE: |
39 | # since roles are lazy, we hold all the attributes |
fb1e11d5 |
40 | # of the individual role in 'statis' until which |
41 | # time when it is applied to a class. This means |
42 | # keeping a lot of things in hash maps, so we are |
21716c07 |
43 | # using a little of that meta-programmin' magic |
fb1e11d5 |
44 | # here an saving lots of extra typin. And since |
45 | # many of these attributes above require similar |
46 | # functionality to support them, so we again use |
47 | # the wonders of meta-programmin' to deliver a |
21716c07 |
48 | # very compact solution to this normally verbose |
49 | # problem. |
50 | # - SL |
51 | |
52 | foreach my $action ( |
fb1e11d5 |
53 | { |
54 | name => 'excluded_roles_map', |
55 | attr_reader => 'get_excluded_roles_map' , |
21716c07 |
56 | methods => { |
fb1e11d5 |
57 | add => 'add_excluded_roles', |
58 | get_list => 'get_excluded_roles_list', |
59 | existence => 'excludes_role', |
21716c07 |
60 | } |
61 | }, |
fb1e11d5 |
62 | { |
63 | name => 'required_methods', |
21716c07 |
64 | attr_reader => 'get_required_methods_map', |
65 | methods => { |
fb1e11d5 |
66 | add => 'add_required_methods', |
21716c07 |
67 | remove => 'remove_required_methods', |
68 | get_list => 'get_required_method_list', |
69 | existence => 'requires_method', |
70 | } |
709c321c |
71 | }, |
21716c07 |
72 | { |
fb1e11d5 |
73 | name => 'attribute_map', |
21716c07 |
74 | attr_reader => 'get_attribute_map', |
75 | methods => { |
76 | get => 'get_attribute', |
77 | get_list => 'get_attribute_list', |
78 | existence => 'has_attribute', |
79 | remove => 'remove_attribute', |
80 | } |
81 | } |
82 | ) { |
fb1e11d5 |
83 | |
21716c07 |
84 | my $attr_reader = $action->{attr_reader}; |
85 | my $methods = $action->{methods}; |
fb1e11d5 |
86 | |
87 | # create the attribute |
88 | $META->add_attribute($action->{name} => ( |
89 | reader => $attr_reader, |
90 | default => sub { {} } |
91 | )); |
92 | |
93 | # create some helper methods |
21716c07 |
94 | $META->add_method($methods->{add} => sub { |
95 | my ($self, @values) = @_; |
fb1e11d5 |
96 | $self->$attr_reader->{$_} = undef foreach @values; |
21716c07 |
97 | }) if exists $methods->{add}; |
fb1e11d5 |
98 | |
21716c07 |
99 | $META->add_method($methods->{get_list} => sub { |
100 | my ($self) = @_; |
fb1e11d5 |
101 | keys %{$self->$attr_reader}; |
102 | }) if exists $methods->{get_list}; |
103 | |
21716c07 |
104 | $META->add_method($methods->{get} => sub { |
105 | my ($self, $name) = @_; |
fb1e11d5 |
106 | $self->$attr_reader->{$name} |
107 | }) if exists $methods->{get}; |
108 | |
21716c07 |
109 | $META->add_method($methods->{existence} => sub { |
110 | my ($self, $name) = @_; |
fb1e11d5 |
111 | exists $self->$attr_reader->{$name} ? 1 : 0; |
112 | }) if exists $methods->{existence}; |
113 | |
21716c07 |
114 | $META->add_method($methods->{remove} => sub { |
115 | my ($self, @values) = @_; |
116 | delete $self->$attr_reader->{$_} foreach @values; |
fb1e11d5 |
117 | }) if exists $methods->{remove}; |
21716c07 |
118 | } |
d79e62fd |
119 | |
21716c07 |
120 | ## some things don't always fit, so they go here ... |
80572233 |
121 | |
21716c07 |
122 | sub add_attribute { |
123 | my $self = shift; |
124 | my $name = shift; |
70ea9161 |
125 | unless ( defined $name && $name ) { |
126 | require Moose; |
127 | Moose->throw_error("You must provide a name for the attribute"); |
128 | } |
21716c07 |
129 | my $attr_desc; |
130 | if (scalar @_ == 1 && ref($_[0]) eq 'HASH') { |
131 | $attr_desc = $_[0]; |
132 | } |
133 | else { |
134 | $attr_desc = { @_ }; |
135 | } |
136 | $self->get_attribute_map->{$name} = $attr_desc; |
137 | } |
e185c027 |
138 | |
21716c07 |
139 | ## ------------------------------------------------------------------ |
140 | ## method modifiers |
141 | |
21716c07 |
142 | # NOTE: |
fb1e11d5 |
143 | # the before/around/after method modifiers are |
21716c07 |
144 | # stored by name, but there can be many methods |
145 | # then associated with that name. So again we have |
146 | # lots of similar functionality, so we can do some |
147 | # meta-programmin' and save some time. |
148 | # - SL |
149 | |
150 | foreach my $modifier_type (qw[ before around after ]) { |
fb1e11d5 |
151 | |
152 | my $attr_reader = "get_${modifier_type}_method_modifiers_map"; |
21716c07 |
153 | |
fb1e11d5 |
154 | # create the attribute ... |
155 | $META->add_attribute("${modifier_type}_method_modifiers" => ( |
156 | reader => $attr_reader, |
157 | default => sub { {} } |
158 | )); |
159 | |
160 | # and some helper methods ... |
21716c07 |
161 | $META->add_method("get_${modifier_type}_method_modifiers" => sub { |
162 | my ($self, $method_name) = @_; |
fb1e11d5 |
163 | #return () unless exists $self->$attr_reader->{$method_name}; |
21716c07 |
164 | @{$self->$attr_reader->{$method_name}}; |
165 | }); |
fb1e11d5 |
166 | |
21716c07 |
167 | $META->add_method("has_${modifier_type}_method_modifiers" => sub { |
168 | my ($self, $method_name) = @_; |
169 | # NOTE: |
fb1e11d5 |
170 | # for now we assume that if it exists,.. |
21716c07 |
171 | # it has at least one modifier in it |
172 | (exists $self->$attr_reader->{$method_name}) ? 1 : 0; |
fb1e11d5 |
173 | }); |
174 | |
21716c07 |
175 | $META->add_method("add_${modifier_type}_method_modifier" => sub { |
176 | my ($self, $method_name, $method) = @_; |
fb1e11d5 |
177 | |
178 | $self->$attr_reader->{$method_name} = [] |
21716c07 |
179 | unless exists $self->$attr_reader->{$method_name}; |
fb1e11d5 |
180 | |
21716c07 |
181 | my $modifiers = $self->$attr_reader->{$method_name}; |
fb1e11d5 |
182 | |
21716c07 |
183 | # NOTE: |
fb1e11d5 |
184 | # check to see that we aren't adding the |
185 | # same code twice. We err in favor of the |
21716c07 |
186 | # first on here, this may not be as expected |
187 | foreach my $modifier (@{$modifiers}) { |
188 | return if $modifier == $method; |
189 | } |
fb1e11d5 |
190 | |
21716c07 |
191 | push @{$modifiers} => $method; |
192 | }); |
fb1e11d5 |
193 | |
21716c07 |
194 | } |
1331430a |
195 | |
21716c07 |
196 | ## ------------------------------------------------------------------ |
197 | ## override method mofidiers |
0558683c |
198 | |
fb1e11d5 |
199 | $META->add_attribute('override_method_modifiers' => ( |
200 | reader => 'get_override_method_modifiers_map', |
201 | default => sub { {} } |
202 | )); |
203 | |
21716c07 |
204 | # NOTE: |
fb1e11d5 |
205 | # these are a little different because there |
21716c07 |
206 | # can only be one per name, whereas the other |
207 | # method modifiers can have multiples. |
208 | # - SL |
0558683c |
209 | |
21716c07 |
210 | sub add_override_method_modifier { |
211 | my ($self, $method_name, $method) = @_; |
212 | (!$self->has_method($method_name)) |
c245d69b |
213 | || Moose->throw_error("Cannot add an override of method '$method_name' " . |
4c0b3599 |
214 | "because there is a local version of '$method_name'"); |
fb1e11d5 |
215 | $self->get_override_method_modifiers_map->{$method_name} = $method; |
21716c07 |
216 | } |
0558683c |
217 | |
21716c07 |
218 | sub has_override_method_modifier { |
219 | my ($self, $method_name) = @_; |
220 | # NOTE: |
fb1e11d5 |
221 | # for now we assume that if it exists,.. |
21716c07 |
222 | # it has at least one modifier in it |
fb1e11d5 |
223 | (exists $self->get_override_method_modifiers_map->{$method_name}) ? 1 : 0; |
21716c07 |
224 | } |
0558683c |
225 | |
21716c07 |
226 | sub get_override_method_modifier { |
227 | my ($self, $method_name) = @_; |
fb1e11d5 |
228 | $self->get_override_method_modifiers_map->{$method_name}; |
21716c07 |
229 | } |
0558683c |
230 | |
21716c07 |
231 | ## general list accessor ... |
80572233 |
232 | |
21716c07 |
233 | sub get_method_modifier_list { |
234 | my ($self, $modifier_type) = @_; |
fb1e11d5 |
235 | my $accessor = "get_${modifier_type}_method_modifiers_map"; |
21716c07 |
236 | keys %{$self->$accessor}; |
237 | } |
e185c027 |
238 | |
e606ae5f |
239 | sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef } |
240 | sub update_package_cache_flag { |
241 | my $self = shift; |
242 | $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name); |
243 | } |
244 | |
245 | |
246 | |
21716c07 |
247 | ## ------------------------------------------------------------------ |
80572233 |
248 | ## subroles |
249 | |
278ca49c |
250 | $META->add_attribute('roles' => ( |
21716c07 |
251 | reader => 'get_roles', |
252 | default => sub { [] } |
253 | )); |
254 | |
80572233 |
255 | sub add_role { |
256 | my ($self, $role) = @_; |
257 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
c245d69b |
258 | || Moose->throw_error("Roles must be instances of Moose::Meta::Role"); |
80572233 |
259 | push @{$self->get_roles} => $role; |
e606ae5f |
260 | $self->reset_package_cache_flag; |
80572233 |
261 | } |
262 | |
b8aeb4dc |
263 | sub calculate_all_roles { |
264 | my $self = shift; |
265 | my %seen; |
fb1e11d5 |
266 | grep { |
267 | !$seen{$_->name}++ |
268 | } ($self, map { |
269 | $_->calculate_all_roles |
270 | } @{ $self->get_roles }); |
b8aeb4dc |
271 | } |
272 | |
80572233 |
273 | sub does_role { |
274 | my ($self, $role_name) = @_; |
275 | (defined $role_name) |
c245d69b |
276 | || Moose->throw_error("You must supply a role name to look for"); |
bdabd620 |
277 | # if we are it,.. then return true |
278 | return 1 if $role_name eq $self->name; |
279 | # otherwise.. check our children |
80572233 |
280 | foreach my $role (@{$self->get_roles}) { |
bdabd620 |
281 | return 1 if $role->does_role($role_name); |
80572233 |
282 | } |
283 | return 0; |
284 | } |
285 | |
21716c07 |
286 | ## ------------------------------------------------------------------ |
fb1e11d5 |
287 | ## methods |
1331430a |
288 | |
21716c07 |
289 | sub method_metaclass { 'Moose::Meta::Role::Method' } |
80572233 |
290 | |
fb1e11d5 |
291 | sub get_method_map { |
093b12c2 |
292 | my $self = shift; |
e606ae5f |
293 | |
294 | my $current = Class::MOP::check_package_cache_flag($self->name); |
295 | |
296 | if (defined $self->{'_package_cache_flag'} && $self->{'_package_cache_flag'} == $current) { |
297 | return $self->{'methods'} ||= {}; |
298 | } |
299 | |
300 | $self->{_package_cache_flag} = $current; |
301 | |
302 | my $map = $self->{'methods'} ||= {}; |
fb1e11d5 |
303 | |
304 | my $role_name = $self->name; |
305 | my $method_metaclass = $self->method_metaclass; |
306 | |
534000fd |
307 | my $all_code = $self->get_all_package_symbols('CODE'); |
fb1e11d5 |
308 | |
534000fd |
309 | foreach my $symbol (keys %{ $all_code }) { |
310 | my $code = $all_code->{$symbol}; |
fb1e11d5 |
311 | |
e606ae5f |
312 | next if exists $map->{$symbol} && |
313 | defined $map->{$symbol} && |
314 | $map->{$symbol}->body == $code; |
315 | |
fb1e11d5 |
316 | my ($pkg, $name) = Class::MOP::get_code_info($code); |
e55d4727 |
317 | my $meta = Class::MOP::class_of($pkg); |
fb1e11d5 |
318 | |
e55d4727 |
319 | if ($meta && $meta->isa('Moose::Meta::Role')) { |
320 | my $role = $meta->name; |
fb1e11d5 |
321 | next unless $self->does_role($role); |
322 | } |
323 | else { |
2887c827 |
324 | # NOTE: |
325 | # in 5.10 constant.pm the constants show up |
326 | # as being in the right package, but in pre-5.10 |
327 | # they show up as constant::__ANON__ so we |
328 | # make an exception here to be sure that things |
329 | # work as expected in both. |
330 | # - SL |
331 | unless ($pkg eq 'constant' && $name eq '__ANON__') { |
332 | next if ($pkg || '') ne $role_name || |
333 | (($name || '') ne '__ANON__' && ($pkg || '') ne $role_name); |
334 | } |
fb1e11d5 |
335 | } |
c4538447 |
336 | |
1b2aea39 |
337 | $map->{$symbol} = $method_metaclass->wrap( |
338 | $code, |
339 | package_name => $role_name, |
340 | name => $name |
341 | ); |
fb1e11d5 |
342 | } |
343 | |
344 | return $map; |
093b12c2 |
345 | } |
346 | |
fb1e11d5 |
347 | sub get_method { |
348 | my ($self, $name) = @_; |
c4538447 |
349 | $self->get_method_map->{$name}; |
fb1e11d5 |
350 | } |
40e89659 |
351 | |
fb1e11d5 |
352 | sub has_method { |
353 | my ($self, $name) = @_; |
354 | exists $self->get_method_map->{$name} ? 1 : 0 |
e185c027 |
355 | } |
356 | |
8c5f7ce4 |
357 | # FIXME this is copy-pasted from Class::MOP::Class |
e606ae5f |
358 | # refactor to inherit from some common base |
359 | sub wrap_method_body { |
360 | my ( $self, %args ) = @_; |
361 | |
87e63626 |
362 | ('CODE' eq ref $args{body}) |
c245d69b |
363 | || Moose->throw_error("Your code block must be a CODE reference"); |
e606ae5f |
364 | |
87e63626 |
365 | $self->method_metaclass->wrap( |
e606ae5f |
366 | package_name => $self->name, |
367 | %args, |
87e63626 |
368 | ); |
e606ae5f |
369 | } |
370 | |
371 | sub add_method { |
372 | my ($self, $method_name, $method) = @_; |
373 | (defined $method_name && $method_name) |
c245d69b |
374 | || Moose->throw_error("You must define a method name"); |
e606ae5f |
375 | |
376 | my $body; |
377 | if (blessed($method)) { |
378 | $body = $method->body; |
87e63626 |
379 | if ($method->package_name ne $self->name) { |
e606ae5f |
380 | $method = $method->clone( |
381 | package_name => $self->name, |
87e63626 |
382 | name => $method_name |
e606ae5f |
383 | ) if $method->can('clone'); |
384 | } |
385 | } |
386 | else { |
387 | $body = $method; |
388 | $method = $self->wrap_method_body( body => $body, name => $method_name ); |
389 | } |
390 | |
391 | $method->attach_to_class($self); |
392 | |
393 | $self->get_method_map->{$method_name} = $method; |
394 | |
395 | my $full_method_name = ($self->name . '::' . $method_name); |
396 | $self->add_package_symbol( |
397 | { sigil => '&', type => 'CODE', name => $method_name }, |
398 | Class::MOP::subname($full_method_name => $body) |
399 | ); |
400 | |
401 | $self->update_package_cache_flag; # still valid, since we just added the method to the map, and if it was invalid before that then get_method_map updated it |
402 | } |
403 | |
1db8ecc7 |
404 | sub find_method_by_name { (shift)->get_method(@_) } |
093b12c2 |
405 | |
fb1e11d5 |
406 | sub get_method_list { |
407 | my $self = shift; |
408 | grep { !/^meta$/ } keys %{$self->get_method_map}; |
409 | } |
410 | |
411 | sub alias_method { |
8b7cb9ab |
412 | Carp::cluck("The alias_method method is deprecated. Use add_method instead.\n"); |
89e6757a |
413 | |
87e63626 |
414 | my $self = shift; |
fb1e11d5 |
415 | |
87e63626 |
416 | $self->add_method(@_); |
fb1e11d5 |
417 | } |
418 | |
21716c07 |
419 | ## ------------------------------------------------------------------ |
fb1e11d5 |
420 | ## role construction |
21716c07 |
421 | ## ------------------------------------------------------------------ |
e185c027 |
422 | |
21716c07 |
423 | sub apply { |
bca01282 |
424 | my ($self, $other, @args) = @_; |
425 | |
426 | (blessed($other)) |
c245d69b |
427 | || Moose->throw_error("You must pass in an blessed instance"); |
bca01282 |
428 | |
1c9db35c |
429 | if ($other->isa('Moose::Meta::Role')) { |
430 | require Moose::Meta::Role::Application::ToRole; |
709c321c |
431 | return Moose::Meta::Role::Application::ToRole->new(@args)->apply($self, $other); |
1c9db35c |
432 | } |
433 | elsif ($other->isa('Moose::Meta::Class')) { |
434 | require Moose::Meta::Role::Application::ToClass; |
709c321c |
435 | return Moose::Meta::Role::Application::ToClass->new(@args)->apply($self, $other); |
1c9db35c |
436 | } |
437 | else { |
438 | require Moose::Meta::Role::Application::ToInstance; |
709c321c |
439 | return Moose::Meta::Role::Application::ToInstance->new(@args)->apply($self, $other); |
1c9db35c |
440 | } |
0558683c |
441 | } |
442 | |
21716c07 |
443 | sub combine { |
a4e516f6 |
444 | my ($class, @role_specs) = @_; |
21716c07 |
445 | |
fb1e11d5 |
446 | require Moose::Meta::Role::Application::RoleSummation; |
a4e516f6 |
447 | require Moose::Meta::Role::Composite; |
448 | |
28412c0b |
449 | my (@roles, %role_params); |
450 | while (@role_specs) { |
451 | my ($role, $params) = @{ splice @role_specs, 0, 1 }; |
a83f867e |
452 | push @roles => Class::MOP::class_of($role); |
28412c0b |
453 | next unless defined $params; |
454 | $role_params{$role} = $params; |
455 | } |
21716c07 |
456 | |
fb1e11d5 |
457 | my $c = Moose::Meta::Role::Composite->new(roles => \@roles); |
a4e516f6 |
458 | Moose::Meta::Role::Application::RoleSummation->new( |
28412c0b |
459 | role_params => \%role_params |
a4e516f6 |
460 | )->apply($c); |
28412c0b |
461 | |
fb1e11d5 |
462 | return $c; |
0558683c |
463 | } |
464 | |
b6a00b82 |
465 | sub create { |
2d5f3fab |
466 | my ( $role, $package_name, %options ) = @_; |
b6a00b82 |
467 | |
2d5f3fab |
468 | $options{package} = $package_name; |
b6a00b82 |
469 | |
470 | (ref $options{attributes} eq 'HASH') |
471 | || confess "You must pass a HASH ref of attributes" |
472 | if exists $options{attributes}; |
473 | |
474 | (ref $options{methods} eq 'HASH') |
475 | || confess "You must pass a HASH ref of methods" |
476 | if exists $options{methods}; |
477 | |
2d5f3fab |
478 | my (%initialize_options) = %options; |
b6a00b82 |
479 | delete @initialize_options{qw( |
480 | package |
481 | attributes |
482 | methods |
483 | version |
484 | authority |
485 | )}; |
486 | |
487 | my $meta = $role->initialize( $package_name => %initialize_options ); |
488 | |
6a4a7c31 |
489 | $meta->_instantiate_module( $options{version}, $options{authority} ); |
490 | |
b6a00b82 |
491 | # FIXME totally lame |
492 | $meta->add_method('meta' => sub { |
493 | $role->initialize(ref($_[0]) || $_[0]); |
494 | }); |
495 | |
496 | if (exists $options{attributes}) { |
497 | foreach my $attribute_name (keys %{$options{attributes}}) { |
498 | my $attr = $options{attributes}->{$attribute_name}; |
499 | $meta->add_attribute($attribute_name => $attr); |
500 | } |
501 | } |
502 | |
503 | if (exists $options{methods}) { |
504 | foreach my $method_name (keys %{$options{methods}}) { |
505 | $meta->add_method($method_name, $options{methods}->{$method_name}); |
506 | } |
507 | } |
508 | |
d1765290 |
509 | Class::MOP::weaken_metaclass($meta->name) |
510 | if $meta->is_anon_role; |
511 | |
b6a00b82 |
512 | return $meta; |
513 | } |
514 | |
c9ee520d |
515 | # anonymous roles. most of it is copied straight out of Class::MOP::Class. |
516 | # an intrepid hacker might find great riches if he unifies this code with that |
517 | # code in Class::MOP::Module or Class::MOP::Package |
518 | { |
519 | # NOTE: |
520 | # this should be sufficient, if you have a |
521 | # use case where it is not, write a test and |
522 | # I will change it. |
523 | my $ANON_ROLE_SERIAL = 0; |
524 | |
525 | # NOTE: |
526 | # we need a sufficiently annoying prefix |
527 | # this should suffice for now, this is |
528 | # used in a couple of places below, so |
529 | # need to put it up here for now. |
530 | my $ANON_ROLE_PREFIX = 'Moose::Meta::Role::__ANON__::SERIAL::'; |
531 | |
532 | sub is_anon_role { |
533 | my $self = shift; |
534 | no warnings 'uninitialized'; |
535 | $self->name =~ /^$ANON_ROLE_PREFIX/; |
536 | } |
537 | |
538 | sub create_anon_role { |
539 | my ($role, %options) = @_; |
540 | my $package_name = $ANON_ROLE_PREFIX . ++$ANON_ROLE_SERIAL; |
541 | return $role->create($package_name, %options); |
542 | } |
543 | |
544 | # NOTE: |
545 | # this will only get called for |
546 | # anon-roles, all other calls |
547 | # are assumed to occur during |
548 | # global destruction and so don't |
549 | # really need to be handled explicitly |
550 | sub DESTROY { |
551 | my $self = shift; |
552 | |
553 | return if Class::MOP::in_global_destruction(); # it'll happen soon anyway and this just makes things more complicated |
554 | |
555 | no warnings 'uninitialized'; |
556 | return unless $self->name =~ /^$ANON_ROLE_PREFIX/; |
557 | |
558 | # XXX: is this necessary for us? I don't understand what it's doing |
559 | # -sartak |
560 | |
561 | # Moose does a weird thing where it replaces the metaclass for |
562 | # class when fixing metaclass incompatibility. In that case, |
563 | # we don't want to clean out the namespace now. We can detect |
564 | # that because Moose will explicitly update the singleton |
565 | # cache in Class::MOP. |
566 | #my $current_meta = Class::MOP::get_metaclass_by_name($self->name); |
567 | #return if $current_meta ne $self; |
568 | |
569 | my ($serial_id) = ($self->name =~ /^$ANON_ROLE_PREFIX(\d+)/); |
570 | no strict 'refs'; |
571 | foreach my $key (keys %{$ANON_ROLE_PREFIX . $serial_id}) { |
572 | delete ${$ANON_ROLE_PREFIX . $serial_id}{$key}; |
573 | } |
574 | delete ${'main::' . $ANON_ROLE_PREFIX}{$serial_id . '::'}; |
575 | } |
576 | } |
577 | |
fb1e11d5 |
578 | ##################################################################### |
579 | ## NOTE: |
580 | ## This is Moose::Meta::Role as defined by Moose (plus the use of |
581 | ## MooseX::AttributeHelpers module). It is here as a reference to |
582 | ## make it easier to see what is happening above with all the meta |
583 | ## programming. - SL |
584 | ##################################################################### |
585 | # |
586 | # has 'roles' => ( |
587 | # metaclass => 'Collection::Array', |
588 | # reader => 'get_roles', |
589 | # isa => 'ArrayRef[Moose::Meta::Roles]', |
590 | # default => sub { [] }, |
591 | # provides => { |
592 | # 'push' => 'add_role', |
593 | # } |
594 | # ); |
595 | # |
596 | # has 'excluded_roles_map' => ( |
597 | # metaclass => 'Collection::Hash', |
598 | # reader => 'get_excluded_roles_map', |
599 | # isa => 'HashRef[Str]', |
600 | # provides => { |
601 | # # Not exactly set, cause it sets multiple |
602 | # 'set' => 'add_excluded_roles', |
603 | # 'keys' => 'get_excluded_roles_list', |
604 | # 'exists' => 'excludes_role', |
605 | # } |
606 | # ); |
607 | # |
608 | # has 'attribute_map' => ( |
609 | # metaclass => 'Collection::Hash', |
610 | # reader => 'get_attribute_map', |
611 | # isa => 'HashRef[Str]', |
612 | # provides => { |
613 | # # 'set' => 'add_attribute' # has some special crap in it |
614 | # 'get' => 'get_attribute', |
615 | # 'keys' => 'get_attribute_list', |
616 | # 'exists' => 'has_attribute', |
617 | # # Not exactly delete, cause it sets multiple |
618 | # 'delete' => 'remove_attribute', |
619 | # } |
620 | # ); |
621 | # |
622 | # has 'required_methods' => ( |
623 | # metaclass => 'Collection::Hash', |
624 | # reader => 'get_required_methods_map', |
625 | # isa => 'HashRef[Str]', |
626 | # provides => { |
627 | # # not exactly set, or delete since it works for multiple |
628 | # 'set' => 'add_required_methods', |
629 | # 'delete' => 'remove_required_methods', |
630 | # 'keys' => 'get_required_method_list', |
631 | # 'exists' => 'requires_method', |
632 | # } |
633 | # ); |
634 | # |
635 | # # the before, around and after modifiers are |
636 | # # HASH keyed by method-name, with ARRAY of |
637 | # # CODE refs to apply in that order |
638 | # |
639 | # has 'before_method_modifiers' => ( |
640 | # metaclass => 'Collection::Hash', |
641 | # reader => 'get_before_method_modifiers_map', |
642 | # isa => 'HashRef[ArrayRef[CodeRef]]', |
643 | # provides => { |
644 | # 'keys' => 'get_before_method_modifiers', |
645 | # 'exists' => 'has_before_method_modifiers', |
646 | # # This actually makes sure there is an |
647 | # # ARRAY at the given key, and pushed onto |
648 | # # it. It also checks for duplicates as well |
649 | # # 'add' => 'add_before_method_modifier' |
650 | # } |
651 | # ); |
652 | # |
653 | # has 'after_method_modifiers' => ( |
654 | # metaclass => 'Collection::Hash', |
655 | # reader =>'get_after_method_modifiers_map', |
656 | # isa => 'HashRef[ArrayRef[CodeRef]]', |
657 | # provides => { |
658 | # 'keys' => 'get_after_method_modifiers', |
659 | # 'exists' => 'has_after_method_modifiers', |
660 | # # This actually makes sure there is an |
661 | # # ARRAY at the given key, and pushed onto |
662 | # # it. It also checks for duplicates as well |
663 | # # 'add' => 'add_after_method_modifier' |
664 | # } |
665 | # ); |
666 | # |
667 | # has 'around_method_modifiers' => ( |
668 | # metaclass => 'Collection::Hash', |
669 | # reader =>'get_around_method_modifiers_map', |
670 | # isa => 'HashRef[ArrayRef[CodeRef]]', |
671 | # provides => { |
672 | # 'keys' => 'get_around_method_modifiers', |
673 | # 'exists' => 'has_around_method_modifiers', |
674 | # # This actually makes sure there is an |
675 | # # ARRAY at the given key, and pushed onto |
676 | # # it. It also checks for duplicates as well |
677 | # # 'add' => 'add_around_method_modifier' |
678 | # } |
679 | # ); |
680 | # |
681 | # # override is similar to the other modifiers |
682 | # # except that it is not an ARRAY of code refs |
683 | # # but instead just a single name->code mapping |
684 | # |
685 | # has 'override_method_modifiers' => ( |
686 | # metaclass => 'Collection::Hash', |
687 | # reader =>'get_override_method_modifiers_map', |
688 | # isa => 'HashRef[CodeRef]', |
689 | # provides => { |
690 | # 'keys' => 'get_override_method_modifier', |
691 | # 'exists' => 'has_override_method_modifier', |
692 | # 'add' => 'add_override_method_modifier', # checks for local method .. |
693 | # } |
694 | # ); |
695 | # |
696 | ##################################################################### |
697 | |
698 | |
e185c027 |
699 | 1; |
700 | |
701 | __END__ |
702 | |
703 | =pod |
704 | |
705 | =head1 NAME |
706 | |
707 | Moose::Meta::Role - The Moose Role metaclass |
708 | |
709 | =head1 DESCRIPTION |
710 | |
705d4cfd |
711 | This class is a subclass of L<Class::MOP::Module> that provides |
712 | additional Moose-specific functionality. |
713 | |
714 | It's API looks a lot like L<Moose::Meta::Class>, but internally it |
715 | implements many things differently. This may change in the future. |
79592a54 |
716 | |
cf3bb5c5 |
717 | =head1 INHERITANCE |
718 | |
719 | C<Moose::Meta::Role> is a subclass of L<Class::MOP::Module>. |
720 | |
e185c027 |
721 | =head1 METHODS |
722 | |
705d4cfd |
723 | =head2 Construction |
724 | |
e185c027 |
725 | =over 4 |
726 | |
705d4cfd |
727 | =item B<< Moose::Meta::Role->initialize($role_name) >> |
e185c027 |
728 | |
705d4cfd |
729 | This method creates a new role object with the provided name. |
e185c027 |
730 | |
705d4cfd |
731 | =item B<< Moose::Meta::Role->combine( [ $role => { ... } ], [ $role ], ... ) >> |
78cd1d3b |
732 | |
705d4cfd |
733 | This method accepts a list of array references. Each array reference |
734 | should contain a role name as its first element. The second element is |
735 | an optional hash reference. The hash reference can contain C<exclude> |
736 | and C<alias> keys to control how methods are composed from the role. |
e606ae5f |
737 | |
705d4cfd |
738 | The return value is a new L<Moose::Meta::Role::Composite> that |
739 | represents the combined roles. |
db1ab48d |
740 | |
705d4cfd |
741 | =item B<< Moose::Meta::Role->create($name, %options) >> |
e185c027 |
742 | |
705d4cfd |
743 | This method is identical to the L<Moose::Meta::Class> C<create> |
744 | method. |
745 | |
746 | =item B<< Moose::Meta::Role->create_anon_role >> |
e185c027 |
747 | |
705d4cfd |
748 | This method is identical to the L<Moose::Meta::Class> |
749 | C<create_anon_class> method. |
e185c027 |
750 | |
705d4cfd |
751 | =item B<< $metarole->is_anon_role >> |
e185c027 |
752 | |
705d4cfd |
753 | Returns true if the role is an anonymous role. |
e185c027 |
754 | |
755 | =back |
756 | |
705d4cfd |
757 | =head2 Role application |
758 | |
e185c027 |
759 | =over 4 |
760 | |
705d4cfd |
761 | =item B<< $metarole->apply( $thing, @options ) >> |
80572233 |
762 | |
705d4cfd |
763 | This method applies a role to the given C<$thing>. That can be another |
764 | L<Moose::Meta::Role>, object, a L<Moose::Meta::Class> object, or a |
765 | (non-meta) object instance. |
80572233 |
766 | |
705d4cfd |
767 | The options are passed directly to the constructor for the appropriate |
768 | L<Moose::Meta::Role::Application> subclass. |
80572233 |
769 | |
770 | =back |
771 | |
705d4cfd |
772 | =head2 Roles and other roles |
773 | |
80572233 |
774 | =over 4 |
775 | |
705d4cfd |
776 | =item B<< $metarole->get_roles >> |
d79e62fd |
777 | |
705d4cfd |
778 | This returns an array reference of roles which this role does. This |
779 | list may include duplicates. |
d79e62fd |
780 | |
705d4cfd |
781 | =item B<< $metarole->calculate_all_roles >> |
d79e62fd |
782 | |
705d4cfd |
783 | This returns a I<unique> list of all roles that this role does, and |
784 | all the roles that its roles do. |
d79e62fd |
785 | |
705d4cfd |
786 | =item B<< $metarole->does_role($role_name) >> |
2b14ac61 |
787 | |
705d4cfd |
788 | Given a role I<name>, returns true if this role does the given |
789 | role. |
d79e62fd |
790 | |
705d4cfd |
791 | =item B<< $metarole->add_role($role) >> |
d79e62fd |
792 | |
705d4cfd |
793 | Given a L<Moose::Meta::Role> object, this adds the role to the list of |
794 | roles that the role does. |
68efb014 |
795 | |
705d4cfd |
796 | =item B<< $metarole->get_excluded_roles_list >> |
be4427d0 |
797 | |
705d4cfd |
798 | Returns a list of role names which this role excludes. |
e185c027 |
799 | |
705d4cfd |
800 | =item B<< $metarole->excludes_role($role_name) >> |
e185c027 |
801 | |
705d4cfd |
802 | Given a role I<name>, returns true if this role excludes the named |
803 | role. |
e606ae5f |
804 | |
705d4cfd |
805 | =item B<< $metarole->add_excluded_roles(@role_names) >> |
e606ae5f |
806 | |
705d4cfd |
807 | Given one or more role names, adds those roles to the list of excluded |
808 | roles. |
bdabd620 |
809 | |
705d4cfd |
810 | =back |
e185c027 |
811 | |
705d4cfd |
812 | =head2 Methods |
093b12c2 |
813 | |
705d4cfd |
814 | The methods for dealing with a role's methods are all identical in API |
815 | and behavior to the same methods in L<Class::MOP::Class>. |
638853cb |
816 | |
705d4cfd |
817 | =over 4 |
53dd42d8 |
818 | |
705d4cfd |
819 | =item B<< $metarole->method_metaclass >> |
e185c027 |
820 | |
705d4cfd |
821 | Returns the method metaclass name for the role. This defaults to |
822 | L<Moose::Meta::Role::Method>. |
e185c027 |
823 | |
705d4cfd |
824 | =item B<< $metarole->get_method($name) >> |
e185c027 |
825 | |
705d4cfd |
826 | =item B<< $metarole->has_method($name) >> |
e185c027 |
827 | |
705d4cfd |
828 | =item B<< $metarole->add_method( $name, $body ) >> |
e185c027 |
829 | |
705d4cfd |
830 | =item B<< $metarole->get_method_list >> |
e185c027 |
831 | |
705d4cfd |
832 | =item B<< $metarole->get_method_map >> |
e185c027 |
833 | |
705d4cfd |
834 | =item B<< $metarole->find_method_by_name($name) >> |
835 | |
836 | These methods are all identical to the methods of the same name in |
837 | L<Class::MOP::Class> |
e185c027 |
838 | |
839 | =back |
840 | |
705d4cfd |
841 | =head2 Attributes |
842 | |
843 | As with methods, the methods for dealing with a role's attribute are |
844 | all identical in API and behavior to the same methods in |
845 | L<Class::MOP::Class>. |
846 | |
847 | However, attributes stored in this class are I<not> stored as |
848 | objects. Rather, the attribute definition is stored as a hash |
849 | reference. When a role is composed into a class, this hash reference |
850 | is passed directly to the metaclass's C<add_attribute> method. |
851 | |
852 | This is quite likely to change in the future. |
853 | |
e185c027 |
854 | =over 4 |
855 | |
705d4cfd |
856 | =item B<< $metarole->get_attribute($attribute_name) >> |
857 | |
858 | =item B<< $metarole->has_attribute($attribute_name) >> |
1331430a |
859 | |
705d4cfd |
860 | =item B<< $metarole->get_attribute_map >> |
38f1204c |
861 | |
705d4cfd |
862 | =item B<< $metarole->get_attribute_list >> |
1331430a |
863 | |
705d4cfd |
864 | =item B<< $metarole->add_attribute($name, %options) >> |
1331430a |
865 | |
705d4cfd |
866 | =item B<< $metarole->remove_attribute($attribute_name) >> |
1331430a |
867 | |
868 | =back |
869 | |
705d4cfd |
870 | =head2 Required methods |
871 | |
0558683c |
872 | =over 4 |
873 | |
705d4cfd |
874 | =item B<< $metarole->get_required_method_list >> |
0558683c |
875 | |
705d4cfd |
876 | Returns the list of methods required by the role. |
0558683c |
877 | |
705d4cfd |
878 | =item B<< $metarole->requires_method($name) >> |
0558683c |
879 | |
705d4cfd |
880 | Returns true if the role requires the named method. |
0558683c |
881 | |
705d4cfd |
882 | =item B<< $metarole->add_required_methods(@names >> |
0558683c |
883 | |
705d4cfd |
884 | Adds the named methods to the roles list of required methods. |
0558683c |
885 | |
705d4cfd |
886 | =item B<< $metarole->remove_required_methods(@names) >> |
0558683c |
887 | |
705d4cfd |
888 | Removes the named methods to the roles list of required methods. |
0558683c |
889 | |
705d4cfd |
890 | =back |
891 | |
892 | =head2 Method modifiers |
0558683c |
893 | |
705d4cfd |
894 | These methods act like their counterparts in L<Class::Mop::Class> and |
895 | L<Moose::Meta::Class>. |
896 | |
897 | However, method modifiers are simply stored internally, and are not |
898 | applied until the role itself is applied to a class. |
0558683c |
899 | |
900 | =over 4 |
901 | |
705d4cfd |
902 | =item B<< $metarole->add_after_method_modifier($method_name, $method) >> |
0558683c |
903 | |
705d4cfd |
904 | =item B<< $metarole->add_around_method_modifier($method_name, $method) >> |
0558683c |
905 | |
705d4cfd |
906 | =item B<< $metarole->add_before_method_modifier($method_name, $method) >> |
0558683c |
907 | |
705d4cfd |
908 | =item B<< $metarole->add_override_method_modifier($method_name, $method) >> |
0558683c |
909 | |
705d4cfd |
910 | These methods all add an appropriate modifier to the internal list of |
911 | modifiers. |
0558683c |
912 | |
705d4cfd |
913 | =item B<< $metarole->has_after_method_modifiers >> |
0558683c |
914 | |
705d4cfd |
915 | =item B<< $metarole->has_around_method_modifiers >> |
916 | |
917 | =item B<< $metarole->has_before_method_modifiers >> |
918 | |
919 | =item B<< $metarole->has_override_method_modifier >> |
0558683c |
920 | |
705d4cfd |
921 | Return true if the role has any modifiers of the given type. |
0558683c |
922 | |
705d4cfd |
923 | =item B<< $metarole->get_after_method_modifiers($method_name) >> |
0558683c |
924 | |
705d4cfd |
925 | =item B<< $metarole->get_around_method_modifiers($method_name) >> |
0558683c |
926 | |
705d4cfd |
927 | =item B<< $metarole->get_before_method_modifiers($method_name) >> |
0558683c |
928 | |
705d4cfd |
929 | Given a method name, returns a list of the appropriate modifiers for |
930 | that method. |
931 | |
932 | =item B<< $metarole->get_override_method_modifier($method_name) >> |
933 | |
934 | Given a method name, returns the override method modifier for that |
935 | method, if it has one. |
0558683c |
936 | |
937 | =back |
938 | |
705d4cfd |
939 | =head2 Introspection |
505065c4 |
940 | |
705d4cfd |
941 | =over 4 |
505065c4 |
942 | |
705d4cfd |
943 | =item B<< Moose::Meta::Role->meta >> |
505065c4 |
944 | |
705d4cfd |
945 | This will return a L<Class::MOP::Class> instance for this class. |
505065c4 |
946 | |
947 | =back |
948 | |
e185c027 |
949 | =head1 BUGS |
950 | |
fb1e11d5 |
951 | All complex software has bugs lurking in it, and this module is no |
e185c027 |
952 | exception. If you find a bug please either email me, or add the bug |
953 | to cpan-RT. |
954 | |
955 | =head1 AUTHOR |
956 | |
957 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
958 | |
959 | =head1 COPYRIGHT AND LICENSE |
960 | |
2840a3b2 |
961 | Copyright 2006-2009 by Infinity Interactive, Inc. |
e185c027 |
962 | |
963 | L<http://www.iinteractive.com> |
964 | |
965 | This library is free software; you can redistribute it and/or modify |
fb1e11d5 |
966 | it under the same terms as Perl itself. |
e185c027 |
967 | |
b8aeb4dc |
968 | =cut |