Commit | Line | Data |
c0e30cf5 |
1 | |
2 | package Moose::Meta::Class; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
0addec44 |
7 | use Class::MOP; |
648e79ae |
8 | |
11c86f15 |
9 | use Carp (); |
f8b6827f |
10 | use List::Util qw( first ); |
11 | use List::MoreUtils qw( any all ); |
21f1e231 |
12 | use Scalar::Util 'weaken', 'blessed'; |
a15dff8d |
13 | |
e606ae5f |
14 | our $VERSION = '0.57'; |
15 | $VERSION = eval $VERSION; |
d44714be |
16 | our $AUTHORITY = 'cpan:STEVAN'; |
bc1e29b5 |
17 | |
8ee73eeb |
18 | use Moose::Meta::Method::Overriden; |
3f9e4b0a |
19 | use Moose::Meta::Method::Augmented; |
bf6fa6b3 |
20 | use Moose::Error::Default; |
8ee73eeb |
21 | |
c0e30cf5 |
22 | use base 'Class::MOP::Class'; |
23 | |
598340d5 |
24 | __PACKAGE__->meta->add_attribute('roles' => ( |
ef333f17 |
25 | reader => 'roles', |
26 | default => sub { [] } |
27 | )); |
28 | |
e606ae5f |
29 | __PACKAGE__->meta->add_attribute('constructor_class' => ( |
30 | accessor => 'constructor_class', |
e0001338 |
31 | default => 'Moose::Meta::Method::Constructor', |
e606ae5f |
32 | )); |
33 | |
34 | __PACKAGE__->meta->add_attribute('destructor_class' => ( |
35 | accessor => 'destructor_class', |
e0001338 |
36 | default => 'Moose::Meta::Method::Destructor', |
e606ae5f |
37 | )); |
38 | |
11c86f15 |
39 | __PACKAGE__->meta->add_attribute('error_class' => ( |
bf6fa6b3 |
40 | accessor => 'error_class', |
41 | default => 'Moose::Error::Default', |
11c86f15 |
42 | )); |
43 | |
44 | |
590868a3 |
45 | sub initialize { |
46 | my $class = shift; |
47 | my $pkg = shift; |
685f7e44 |
48 | return Class::MOP::get_metaclass_by_name($pkg) |
49 | || $class->SUPER::initialize($pkg, |
50 | 'attribute_metaclass' => 'Moose::Meta::Attribute', |
51 | 'method_metaclass' => 'Moose::Meta::Method', |
52 | 'instance_metaclass' => 'Moose::Meta::Instance', |
53 | @_ |
54 | ); |
ac2dc464 |
55 | } |
590868a3 |
56 | |
61bdd94f |
57 | sub create { |
58 | my ($self, $package_name, %options) = @_; |
59 | |
60 | (ref $options{roles} eq 'ARRAY') |
11c86f15 |
61 | || $self->throw_error("You must pass an ARRAY ref of roles", data => $options{roles}) |
61bdd94f |
62 | if exists $options{roles}; |
dd37a5be |
63 | |
61bdd94f |
64 | my $class = $self->SUPER::create($package_name, %options); |
dd37a5be |
65 | |
48045612 |
66 | if (exists $options{roles}) { |
61bdd94f |
67 | Moose::Util::apply_all_roles($class, @{$options{roles}}); |
68 | } |
69 | |
70 | return $class; |
71 | } |
72 | |
2b72f3b4 |
73 | sub check_metaclass_compatibility { |
74 | my $self = shift; |
75 | |
76 | if ( my @supers = $self->superclasses ) { |
77 | $self->_fix_metaclass_incompatibility(@supers); |
78 | } |
79 | |
80 | $self->SUPER::check_metaclass_compatibility(@_); |
81 | } |
82 | |
17594769 |
83 | my %ANON_CLASSES; |
84 | |
85 | sub create_anon_class { |
86 | my ($self, %options) = @_; |
87 | |
88 | my $cache_ok = delete $options{cache}; |
17594769 |
89 | |
90 | # something like Super::Class|Super::Class::2=Role|Role::1 |
91 | my $cache_key = join '=' => ( |
6d5cbd2b |
92 | join('|', sort @{$options{superclasses} || []}), |
93 | join('|', sort @{$options{roles} || []}), |
17594769 |
94 | ); |
95 | |
6d5cbd2b |
96 | if ($cache_ok && defined $ANON_CLASSES{$cache_key}) { |
17594769 |
97 | return $ANON_CLASSES{$cache_key}; |
98 | } |
99 | |
100 | my $new_class = $self->SUPER::create_anon_class(%options); |
101 | |
6d5cbd2b |
102 | $ANON_CLASSES{$cache_key} = $new_class |
103 | if $cache_ok; |
17594769 |
104 | |
105 | return $new_class; |
106 | } |
107 | |
ef333f17 |
108 | sub add_role { |
109 | my ($self, $role) = @_; |
110 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
11c86f15 |
111 | || $self->throw_error("Roles must be instances of Moose::Meta::Role", data => $role); |
ef333f17 |
112 | push @{$self->roles} => $role; |
113 | } |
114 | |
b8aeb4dc |
115 | sub calculate_all_roles { |
116 | my $self = shift; |
117 | my %seen; |
118 | grep { !$seen{$_->name}++ } map { $_->calculate_all_roles } @{ $self->roles }; |
119 | } |
120 | |
ef333f17 |
121 | sub does_role { |
122 | my ($self, $role_name) = @_; |
123 | (defined $role_name) |
11c86f15 |
124 | || $self->throw_error("You must supply a role name to look for"); |
9c429218 |
125 | foreach my $class ($self->class_precedence_list) { |
81c3738f |
126 | next unless $class->can('meta') && $class->meta->can('roles'); |
9c429218 |
127 | foreach my $role (@{$class->meta->roles}) { |
128 | return 1 if $role->does_role($role_name); |
129 | } |
ef333f17 |
130 | } |
131 | return 0; |
132 | } |
133 | |
d79e62fd |
134 | sub excludes_role { |
135 | my ($self, $role_name) = @_; |
136 | (defined $role_name) |
11c86f15 |
137 | || $self->throw_error("You must supply a role name to look for"); |
ac2dc464 |
138 | foreach my $class ($self->class_precedence_list) { |
139 | next unless $class->can('meta'); |
5cb193ed |
140 | # NOTE: |
141 | # in the pretty rare instance when a Moose metaclass |
ac2dc464 |
142 | # is itself extended with a role, this check needs to |
5cb193ed |
143 | # be done since some items in the class_precedence_list |
ac2dc464 |
144 | # might in fact be Class::MOP based still. |
145 | next unless $class->meta->can('roles'); |
9c429218 |
146 | foreach my $role (@{$class->meta->roles}) { |
147 | return 1 if $role->excludes_role($role_name); |
148 | } |
d79e62fd |
149 | } |
150 | return 0; |
151 | } |
152 | |
8c9d74e7 |
153 | sub new_object { |
e606ae5f |
154 | my $class = shift; |
155 | my $params = @_ == 1 ? $_[0] : {@_}; |
156 | my $self = $class->SUPER::new_object($params); |
8c9d74e7 |
157 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
4078709c |
158 | # if we have a trigger, then ... |
159 | if ($attr->can('has_trigger') && $attr->has_trigger) { |
160 | # make sure we have an init-arg ... |
161 | if (defined(my $init_arg = $attr->init_arg)) { |
162 | # now make sure an init-arg was passes ... |
e606ae5f |
163 | if (exists $params->{$init_arg}) { |
4078709c |
164 | # and if get here, fire the trigger |
165 | $attr->trigger->( |
166 | $self, |
167 | # check if there is a coercion |
168 | ($attr->should_coerce |
169 | # and if so, we need to grab the |
170 | # value that is actually been stored |
171 | ? $attr->get_read_method_ref->($self) |
172 | # otherwise, just get the value from |
173 | # the constructor params |
e606ae5f |
174 | : $params->{$init_arg}), |
4078709c |
175 | $attr |
176 | ); |
177 | } |
178 | } |
625d571f |
179 | } |
8c9d74e7 |
180 | } |
ac2dc464 |
181 | return $self; |
8c9d74e7 |
182 | } |
183 | |
a15dff8d |
184 | sub construct_instance { |
e606ae5f |
185 | my $class = shift; |
186 | my $params = @_ == 1 ? $_[0] : {@_}; |
ddd0ec20 |
187 | my $meta_instance = $class->get_meta_instance; |
575db57d |
188 | # FIXME: |
189 | # the code below is almost certainly incorrect |
190 | # but this is foreign inheritence, so we might |
ac2dc464 |
191 | # have to kludge it in the end. |
e606ae5f |
192 | my $instance = $params->{'__INSTANCE__'} || $meta_instance->create_instance(); |
ac2dc464 |
193 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
e606ae5f |
194 | $attr->initialize_instance_slot($meta_instance, $instance, $params); |
a15dff8d |
195 | } |
196 | return $instance; |
197 | } |
198 | |
093b12c2 |
199 | # FIXME: |
200 | # This is ugly |
ac2dc464 |
201 | sub get_method_map { |
093b12c2 |
202 | my $self = shift; |
53dd42d8 |
203 | |
e606ae5f |
204 | my $current = Class::MOP::check_package_cache_flag($self->name); |
205 | |
206 | if (defined $self->{'_package_cache_flag'} && $self->{'_package_cache_flag'} == $current) { |
207 | return $self->{'methods'}; |
53dd42d8 |
208 | } |
209 | |
e606ae5f |
210 | $self->{_package_cache_flag} = $current; |
211 | |
212 | my $map = $self->{'methods'}; |
ac2dc464 |
213 | |
093b12c2 |
214 | my $class_name = $self->name; |
215 | my $method_metaclass = $self->method_metaclass; |
ac2dc464 |
216 | |
0addec44 |
217 | my %all_code = $self->get_all_package_symbols('CODE'); |
ac2dc464 |
218 | |
0addec44 |
219 | foreach my $symbol (keys %all_code) { |
220 | my $code = $all_code{$symbol}; |
ac2dc464 |
221 | |
222 | next if exists $map->{$symbol} && |
223 | defined $map->{$symbol} && |
224 | $map->{$symbol}->body == $code; |
225 | |
53dd42d8 |
226 | my ($pkg, $name) = Class::MOP::get_code_info($code); |
ac2dc464 |
227 | |
53dd42d8 |
228 | if ($pkg->can('meta') |
4f8f3aab |
229 | # NOTE: |
230 | # we don't know what ->meta we are calling |
53dd42d8 |
231 | # here, so we need to be careful cause it |
232 | # just might blow up at us, or just complain |
233 | # loudly (in the case of Curses.pm) so we |
4f8f3aab |
234 | # just be a little overly cautious here. |
235 | # - SL |
236 | && eval { no warnings; blessed($pkg->meta) } |
237 | && $pkg->meta->isa('Moose::Meta::Role')) { |
093b12c2 |
238 | #my $role = $pkg->meta->name; |
239 | #next unless $self->does_role($role); |
240 | } |
241 | else { |
2887c827 |
242 | |
243 | # NOTE: |
244 | # in 5.10 constant.pm the constants show up |
245 | # as being in the right package, but in pre-5.10 |
246 | # they show up as constant::__ANON__ so we |
247 | # make an exception here to be sure that things |
248 | # work as expected in both. |
249 | # - SL |
250 | unless ($pkg eq 'constant' && $name eq '__ANON__') { |
251 | next if ($pkg || '') ne $class_name || |
252 | (($name || '') ne '__ANON__' && ($pkg || '') ne $class_name); |
253 | } |
53dd42d8 |
254 | |
093b12c2 |
255 | } |
ac2dc464 |
256 | |
1b2aea39 |
257 | $map->{$symbol} = $method_metaclass->wrap( |
258 | $code, |
259 | package_name => $class_name, |
260 | name => $symbol |
261 | ); |
093b12c2 |
262 | } |
ac2dc464 |
263 | |
093b12c2 |
264 | return $map; |
a7d0cd00 |
265 | } |
266 | |
093b12c2 |
267 | ### --------------------------------------------- |
268 | |
a2eec5e7 |
269 | sub add_attribute { |
270 | my $self = shift; |
e472c9a5 |
271 | $self->SUPER::add_attribute( |
272 | (blessed $_[0] && $_[0]->isa('Class::MOP::Attribute') |
273 | ? $_[0] |
274 | : $self->_process_attribute(@_)) |
275 | ); |
a2eec5e7 |
276 | } |
277 | |
78cd1d3b |
278 | sub add_override_method_modifier { |
279 | my ($self, $name, $method, $_super_package) = @_; |
18c2ec0e |
280 | |
d05cd563 |
281 | (!$self->has_method($name)) |
11c86f15 |
282 | || $self->throw_error("Cannot add an override method if a local method is already present"); |
18c2ec0e |
283 | |
284 | $self->add_method($name => Moose::Meta::Method::Overriden->new( |
3f9e4b0a |
285 | method => $method, |
286 | class => $self, |
287 | package => $_super_package, # need this for roles |
288 | name => $name, |
18c2ec0e |
289 | )); |
78cd1d3b |
290 | } |
291 | |
292 | sub add_augment_method_modifier { |
ac2dc464 |
293 | my ($self, $name, $method) = @_; |
d05cd563 |
294 | (!$self->has_method($name)) |
11c86f15 |
295 | || $self->throw_error("Cannot add an augment method if a local method is already present"); |
3f9e4b0a |
296 | |
297 | $self->add_method($name => Moose::Meta::Method::Augmented->new( |
298 | method => $method, |
299 | class => $self, |
300 | name => $name, |
301 | )); |
78cd1d3b |
302 | } |
303 | |
1341f10c |
304 | ## Private Utility methods ... |
305 | |
05d9eaf6 |
306 | sub _find_next_method_by_name_which_is_not_overridden { |
307 | my ($self, $name) = @_; |
68efb014 |
308 | foreach my $method ($self->find_all_methods_by_name($name)) { |
ac2dc464 |
309 | return $method->{code} |
05d9eaf6 |
310 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overriden'); |
311 | } |
312 | return undef; |
313 | } |
314 | |
41419b9e |
315 | sub _fix_metaclass_incompatibility { |
1341f10c |
316 | my ($self, @superclasses) = @_; |
e606ae5f |
317 | |
1341f10c |
318 | foreach my $super (@superclasses) { |
f8b6827f |
319 | next if $self->_superclass_meta_is_compatible($super); |
e606ae5f |
320 | |
321 | unless ( $self->is_pristine ) { |
f8b6827f |
322 | $self->throw_error( |
323 | "Cannot attempt to reinitialize metaclass for " |
324 | . $self->name |
325 | . ", it isn't pristine" ); |
1341f10c |
326 | } |
e606ae5f |
327 | |
0635500e |
328 | $self->_reconcile_with_superclass_meta($super); |
f8b6827f |
329 | } |
f8b6827f |
330 | } |
331 | |
332 | sub _superclass_meta_is_compatible { |
333 | my ($self, $super) = @_; |
334 | |
335 | my $super_meta = Class::MOP::Class->initialize($super) |
336 | or return 1; |
337 | |
338 | next unless $super_meta->isa("Class::MOP::Class"); |
339 | |
340 | my $super_meta_name |
341 | = $super_meta->is_immutable |
342 | ? $super_meta->get_mutable_metaclass_name |
343 | : ref($super_meta); |
344 | |
345 | return 1 |
346 | if $self->isa($super_meta_name) |
347 | and |
348 | $self->instance_metaclass->isa( $super_meta->instance_metaclass ); |
349 | } |
350 | |
351 | # I don't want to have to type this >1 time |
352 | my @MetaClassTypes = |
353 | qw( attribute_metaclass method_metaclass instance_metaclass constructor_class destructor_class ); |
354 | |
355 | sub _reconcile_with_superclass_meta { |
356 | my ($self, $super) = @_; |
357 | |
358 | my $super_meta = $super->meta; |
359 | |
dd37a5be |
360 | my $super_meta_name |
f8b6827f |
361 | = $super_meta->is_immutable |
362 | ? $super_meta->get_mutable_metaclass_name |
363 | : ref($super_meta); |
e606ae5f |
364 | |
f8b6827f |
365 | my $self_metaclass = ref $self; |
366 | |
367 | # If neither of these is true we have a more serious |
368 | # incompatibility that we just cannot fix (yet?). |
dd37a5be |
369 | if ( $super_meta_name->isa( ref $self ) |
f8b6827f |
370 | && all { $super_meta->$_->isa( $self->$_ ) } @MetaClassTypes ) { |
0635500e |
371 | $self->_reinitialize_with($super_meta); |
f8b6827f |
372 | } |
373 | elsif ( $self->_all_metaclasses_differ_by_roles_only($super_meta) ) { |
0635500e |
374 | $self->_reconcile_role_differences($super_meta); |
1341f10c |
375 | } |
1341f10c |
376 | } |
377 | |
f8b6827f |
378 | sub _reinitialize_with { |
379 | my ( $self, $new_meta ) = @_; |
380 | |
0635500e |
381 | my $new_self = $new_meta->reinitialize( |
f8b6827f |
382 | $self->name, |
383 | attribute_metaclass => $new_meta->attribute_metaclass, |
384 | method_metaclass => $new_meta->method_metaclass, |
385 | instance_metaclass => $new_meta->instance_metaclass, |
386 | ); |
387 | |
0635500e |
388 | $new_self->$_( $new_meta->$_ ) for qw( constructor_class destructor_class ); |
f8b6827f |
389 | |
0635500e |
390 | %$self = %$new_self; |
391 | |
392 | bless $self, ref $new_self; |
393 | |
4c5fcc12 |
394 | # We need to replace the cached metaclass instance or else when it |
395 | # goes out of scope Class::MOP::Class destroy's the namespace for |
396 | # the metaclass's class, causing much havoc. |
0635500e |
397 | Class::MOP::store_metaclass_by_name( $self->name, $self ); |
4c5fcc12 |
398 | Class::MOP::weaken_metaclass( $self->name ) if $self->is_anon_class; |
f8b6827f |
399 | } |
400 | |
401 | # In the more complex case, we share a common ancestor with our |
402 | # superclass's metaclass, but each metaclass (ours and the parent's) |
403 | # has a different set of roles applied. We reconcile this by first |
404 | # reinitializing into the parent class, and _then_ applying our own |
405 | # roles. |
406 | sub _all_metaclasses_differ_by_roles_only { |
407 | my ($self, $super_meta) = @_; |
408 | |
409 | for my $pair ( |
410 | [ ref $self, ref $super_meta ], |
411 | map { [ $self->$_, $super_meta->$_ ] } @MetaClassTypes |
412 | ) { |
413 | |
414 | next if $pair->[0] eq $pair->[1]; |
415 | |
416 | my $self_meta_meta = Class::MOP::Class->initialize( $pair->[0] ); |
417 | my $super_meta_meta = Class::MOP::Class->initialize( $pair->[1] ); |
418 | |
419 | my $common_ancestor |
420 | = _find_common_ancestor( $self_meta_meta, $super_meta_meta ); |
421 | |
422 | return unless $common_ancestor; |
423 | |
424 | return |
425 | unless _is_role_only_subclass_of( |
426 | $self_meta_meta, |
427 | $common_ancestor, |
428 | ) |
429 | && _is_role_only_subclass_of( |
430 | $super_meta_meta, |
431 | $common_ancestor, |
432 | ); |
433 | } |
434 | |
435 | return 1; |
436 | } |
437 | |
438 | # This, and some other functions, could be called as methods, but |
439 | # they're not for two reasons. One, we just end up ignoring the first |
440 | # argument, because we can't call these directly on one of the real |
441 | # arguments, because one of them could be a Class::MOP::Class object |
442 | # and not a Moose::Meta::Class. Second, only a completely insane |
443 | # person would attempt to subclass this stuff! |
444 | sub _find_common_ancestor { |
445 | my ($meta1, $meta2) = @_; |
446 | |
447 | # FIXME? This doesn't account for multiple inheritance (not sure |
448 | # if it needs to though). For example, is somewhere in $meta1's |
449 | # history it inherits from both ClassA and ClassB, and $meta |
450 | # inherits from ClassB & ClassA, does it matter? And what crazy |
451 | # fool would do that anyway? |
452 | |
453 | my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa; |
454 | |
455 | return first { $meta1_parents{$_} } $meta2->linearized_isa; |
456 | } |
457 | |
458 | sub _is_role_only_subclass_of { |
459 | my ($meta, $ancestor) = @_; |
460 | |
461 | return 1 if $meta->name eq $ancestor; |
462 | |
463 | my @roles = _all_roles_until( $meta, $ancestor ); |
464 | |
465 | my %role_packages = map { $_->name => 1 } @roles; |
466 | |
467 | my $ancestor_meta = Class::MOP::Class->initialize($ancestor); |
468 | |
469 | my %shared_ancestors = map { $_ => 1 } $ancestor_meta->linearized_isa; |
470 | |
471 | for my $method ( $meta->get_all_methods() ) { |
472 | next if $method->name eq 'meta'; |
473 | next if $method->can('associated_attribute'); |
474 | |
475 | next |
476 | if $role_packages{ $method->original_package_name } |
477 | || $shared_ancestors{ $method->original_package_name }; |
478 | |
479 | return 0; |
480 | } |
481 | |
482 | # FIXME - this really isn't right. Just because an attribute is |
483 | # defined in a role doesn't mean it isn't _also_ defined in the |
484 | # subclass. |
485 | for my $attr ( $meta->get_all_attributes ) { |
486 | next if $shared_ancestors{ $attr->associated_class->name }; |
487 | |
488 | next if any { $_->has_attribute( $attr->name ) } @roles; |
489 | |
490 | return 0; |
491 | } |
492 | |
493 | return 1; |
494 | } |
495 | |
496 | sub _all_roles { |
497 | my $meta = shift; |
498 | |
499 | return _all_roles_until($meta); |
500 | } |
501 | |
502 | sub _all_roles_until { |
503 | my ($meta, $stop_at_class) = @_; |
504 | |
505 | return unless $meta->can('calculate_all_roles'); |
506 | |
507 | my @roles = $meta->calculate_all_roles; |
508 | |
509 | for my $class ( $meta->linearized_isa ) { |
510 | last if $stop_at_class && $stop_at_class eq $class; |
511 | |
512 | my $meta = Class::MOP::Class->initialize($class); |
513 | last unless $meta->can('calculate_all_roles'); |
514 | |
515 | push @roles, $meta->calculate_all_roles; |
516 | } |
517 | |
518 | return @roles; |
519 | } |
520 | |
521 | sub _reconcile_role_differences { |
522 | my ($self, $super_meta) = @_; |
523 | |
524 | my $self_meta = $self->meta; |
525 | |
526 | my %roles; |
527 | |
528 | if ( my @roles = map { $_->name } _all_roles($self_meta) ) { |
529 | $roles{metaclass_roles} = \@roles; |
530 | } |
531 | |
532 | for my $thing (@MetaClassTypes) { |
533 | my $name = $self->$thing(); |
534 | |
535 | my $thing_meta = Class::MOP::Class->initialize($name); |
536 | |
537 | my @roles = map { $_->name } _all_roles($thing_meta) |
538 | or next; |
539 | |
540 | $roles{ $thing . '_roles' } = \@roles; |
541 | } |
542 | |
2b72f3b4 |
543 | $self->_reinitialize_with($super_meta); |
f8b6827f |
544 | |
545 | Moose::Util::MetaRole::apply_metaclass_roles( |
546 | for_class => $self->name, |
547 | %roles, |
548 | ); |
549 | |
550 | return $self; |
551 | } |
552 | |
d7d8a8c7 |
553 | # NOTE: |
d9bb6c63 |
554 | # this was crap anyway, see |
555 | # Moose::Util::apply_all_roles |
d7d8a8c7 |
556 | # instead |
4498537c |
557 | sub _apply_all_roles { |
547dda77 |
558 | Carp::croak 'DEPRECATED: use Moose::Util::apply_all_roles($meta, @roles) instead' |
4498537c |
559 | } |
1341f10c |
560 | |
561 | sub _process_attribute { |
a3738e5b |
562 | my ( $self, $name, @args ) = @_; |
7e59b803 |
563 | |
564 | @args = %{$args[0]} if scalar @args == 1 && ref($args[0]) eq 'HASH'; |
d9bb6c63 |
565 | |
1341f10c |
566 | if ($name =~ /^\+(.*)/) { |
7e59b803 |
567 | return $self->_process_inherited_attribute($1, @args); |
1341f10c |
568 | } |
569 | else { |
7e59b803 |
570 | return $self->_process_new_attribute($name, @args); |
571 | } |
572 | } |
573 | |
574 | sub _process_new_attribute { |
575 | my ( $self, $name, @args ) = @_; |
7e59b803 |
576 | |
d5c30e52 |
577 | $self->attribute_metaclass->interpolate_class_and_new($name, @args); |
1341f10c |
578 | } |
579 | |
580 | sub _process_inherited_attribute { |
581 | my ($self, $attr_name, %options) = @_; |
582 | my $inherited_attr = $self->find_attribute_by_name($attr_name); |
583 | (defined $inherited_attr) |
11c86f15 |
584 | || $self->throw_error("Could not find an attribute by the name of '$attr_name' to inherit from", data => $attr_name); |
1341f10c |
585 | if ($inherited_attr->isa('Moose::Meta::Attribute')) { |
d7d8a8c7 |
586 | return $inherited_attr->clone_and_inherit_options(%options); |
1341f10c |
587 | } |
588 | else { |
589 | # NOTE: |
590 | # kind of a kludge to handle Class::MOP::Attributes |
d7d8a8c7 |
591 | return $inherited_attr->Moose::Meta::Attribute::clone_and_inherit_options(%options); |
ac2dc464 |
592 | } |
1341f10c |
593 | } |
594 | |
5cf3dbcf |
595 | ## ------------------------------------------------- |
596 | |
597 | use Moose::Meta::Method::Constructor; |
1f779926 |
598 | use Moose::Meta::Method::Destructor; |
5cf3dbcf |
599 | |
ac2dc464 |
600 | # This could be done by using SUPER and altering ->options |
601 | # I am keeping it this way to make it more explicit. |
602 | sub create_immutable_transformer { |
603 | my $self = shift; |
604 | my $class = Class::MOP::Immutable->new($self, { |
e606ae5f |
605 | read_only => [qw/superclasses/], |
606 | cannot_call => [qw/ |
607 | add_method |
608 | alias_method |
609 | remove_method |
610 | add_attribute |
611 | remove_attribute |
612 | remove_package_symbol |
613 | add_role |
614 | /], |
615 | memoize => { |
616 | class_precedence_list => 'ARRAY', |
617 | linearized_isa => 'ARRAY', # FIXME perl 5.10 memoizes this on its own, no need? |
618 | get_all_methods => 'ARRAY', |
619 | #get_all_attributes => 'ARRAY', # it's an alias, no need, but maybe in the future |
620 | compute_all_applicable_attributes => 'ARRAY', |
621 | get_meta_instance => 'SCALAR', |
622 | get_method_map => 'SCALAR', |
623 | calculate_all_roles => 'ARRAY', |
624 | }, |
625 | # NOTE: |
626 | # this is ugly, but so are typeglobs, |
627 | # so whattayahgonnadoboutit |
628 | # - SL |
629 | wrapped => { |
630 | add_package_symbol => sub { |
631 | my $original = shift; |
632 | $self->throw_error("Cannot add package symbols to an immutable metaclass") |
633 | unless (caller(2))[3] eq 'Class::MOP::Package::get_package_symbol'; |
634 | goto $original->body; |
635 | }, |
636 | }, |
ac2dc464 |
637 | }); |
638 | return $class; |
639 | } |
640 | |
641 | sub make_immutable { |
642 | my $self = shift; |
643 | $self->SUPER::make_immutable |
644 | ( |
e606ae5f |
645 | constructor_class => $self->constructor_class, |
646 | destructor_class => $self->destructor_class, |
ac2dc464 |
647 | inline_destructor => 1, |
648 | # NOTE: |
649 | # no need to do this, |
650 | # Moose always does it |
651 | inline_accessors => 0, |
652 | @_, |
653 | ); |
5cf3dbcf |
654 | } |
655 | |
bf6fa6b3 |
656 | our $error_level; |
11c86f15 |
657 | |
658 | sub throw_error { |
659 | my ( $self, @args ) = @_; |
bf6fa6b3 |
660 | local $error_level = ($error_level || 0) + 1; |
11c86f15 |
661 | $self->raise_error($self->create_error(@args)); |
662 | } |
663 | |
664 | sub raise_error { |
665 | my ( $self, @args ) = @_; |
666 | die @args; |
667 | } |
668 | |
669 | sub create_error { |
670 | my ( $self, @args ) = @_; |
671 | |
18748ad6 |
672 | require Carp::Heavy; |
673 | |
bf6fa6b3 |
674 | local $error_level = ($error_level || 0 ) + 1; |
18748ad6 |
675 | |
11c86f15 |
676 | if ( @args % 2 == 1 ) { |
677 | unshift @args, "message"; |
678 | } |
679 | |
fcab1742 |
680 | my %args = ( metaclass => $self, last_error => $@, @args ); |
11c86f15 |
681 | |
bf6fa6b3 |
682 | $args{depth} += $error_level; |
11c86f15 |
683 | |
bf6fa6b3 |
684 | my $class = ref $self ? $self->error_class : "Moose::Error::Default"; |
11c86f15 |
685 | |
a810a01f |
686 | Class::MOP::load_class($class); |
687 | |
11c86f15 |
688 | $class->new( |
bf6fa6b3 |
689 | Carp::caller_info($args{depth}), |
690 | %args |
11c86f15 |
691 | ); |
692 | } |
693 | |
c0e30cf5 |
694 | 1; |
695 | |
696 | __END__ |
697 | |
698 | =pod |
699 | |
700 | =head1 NAME |
701 | |
e522431d |
702 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
703 | |
c0e30cf5 |
704 | =head1 DESCRIPTION |
705 | |
ac2dc464 |
706 | This is a subclass of L<Class::MOP::Class> with Moose specific |
e522431d |
707 | extensions. |
708 | |
ac2dc464 |
709 | For the most part, the only time you will ever encounter an |
710 | instance of this class is if you are doing some serious deep |
711 | introspection. To really understand this class, you need to refer |
6ba6d68c |
712 | to the L<Class::MOP::Class> documentation. |
713 | |
c0e30cf5 |
714 | =head1 METHODS |
715 | |
716 | =over 4 |
717 | |
590868a3 |
718 | =item B<initialize> |
719 | |
61bdd94f |
720 | =item B<create> |
721 | |
17594769 |
722 | Overrides original to accept a list of roles to apply to |
61bdd94f |
723 | the created class. |
724 | |
17594769 |
725 | my $metaclass = Moose::Meta::Class->create( 'New::Class', roles => [...] ); |
726 | |
727 | =item B<create_anon_class> |
728 | |
729 | Overrides original to support roles and caching. |
730 | |
731 | my $metaclass = Moose::Meta::Class->create_anon_class( |
732 | superclasses => ['Foo'], |
733 | roles => [qw/Some Roles Go Here/], |
734 | cache => 1, |
735 | ); |
736 | |
5cf3dbcf |
737 | =item B<make_immutable> |
738 | |
ac2dc464 |
739 | Override original to add default options for inlining destructor |
740 | and altering the Constructor metaclass. |
741 | |
742 | =item B<create_immutable_transformer> |
743 | |
744 | Override original to lock C<add_role> and memoize C<calculate_all_roles> |
745 | |
8c9d74e7 |
746 | =item B<new_object> |
747 | |
02a0fb52 |
748 | We override this method to support the C<trigger> attribute option. |
749 | |
a15dff8d |
750 | =item B<construct_instance> |
751 | |
ac2dc464 |
752 | This provides some Moose specific extensions to this method, you |
753 | almost never call this method directly unless you really know what |
754 | you are doing. |
6ba6d68c |
755 | |
756 | This method makes sure to handle the moose weak-ref, type-constraint |
ac2dc464 |
757 | and type coercion features. |
ef1d5f4b |
758 | |
093b12c2 |
759 | =item B<get_method_map> |
e9ec68d6 |
760 | |
ac2dc464 |
761 | This accommodates Moose::Meta::Role::Method instances, which are |
762 | aliased, instead of added, but still need to be counted as valid |
e9ec68d6 |
763 | methods. |
764 | |
78cd1d3b |
765 | =item B<add_override_method_modifier ($name, $method)> |
766 | |
ac2dc464 |
767 | This will create an C<override> method modifier for you, and install |
02a0fb52 |
768 | it in the package. |
769 | |
78cd1d3b |
770 | =item B<add_augment_method_modifier ($name, $method)> |
771 | |
ac2dc464 |
772 | This will create an C<augment> method modifier for you, and install |
02a0fb52 |
773 | it in the package. |
774 | |
2b14ac61 |
775 | =item B<calculate_all_roles> |
776 | |
ef333f17 |
777 | =item B<roles> |
778 | |
ac2dc464 |
779 | This will return an array of C<Moose::Meta::Role> instances which are |
02a0fb52 |
780 | attached to this class. |
781 | |
ef333f17 |
782 | =item B<add_role ($role)> |
783 | |
ac2dc464 |
784 | This takes an instance of C<Moose::Meta::Role> in C<$role>, and adds it |
02a0fb52 |
785 | to the list of associated roles. |
786 | |
ef333f17 |
787 | =item B<does_role ($role_name)> |
788 | |
ac2dc464 |
789 | This will test if this class C<does> a given C<$role_name>. It will |
790 | not only check it's local roles, but ask them as well in order to |
02a0fb52 |
791 | cascade down the role hierarchy. |
792 | |
d79e62fd |
793 | =item B<excludes_role ($role_name)> |
794 | |
ac2dc464 |
795 | This will test if this class C<excludes> a given C<$role_name>. It will |
796 | not only check it's local roles, but ask them as well in order to |
d79e62fd |
797 | cascade down the role hierarchy. |
798 | |
9e93dd19 |
799 | =item B<add_attribute ($attr_name, %params|$params)> |
4e848edb |
800 | |
9e93dd19 |
801 | This method does the same thing as L<Class::MOP::Class::add_attribute>, but adds |
802 | support for taking the C<$params> as a HASH ref. |
ac1ef2f9 |
803 | |
e606ae5f |
804 | =item B<constructor_class ($class_name)> |
805 | |
806 | =item B<destructor_class ($class_name)> |
807 | |
808 | These are the names of classes used when making a class |
809 | immutable. These default to L<Moose::Meta::Method::Constructor> and |
810 | L<Moose::Meta::Method::Destructor> respectively. These accessors are |
811 | read-write, so you can use them to change the class name. |
812 | |
4fb87686 |
813 | =item B<check_metaclass_compatibility> |
814 | |
815 | Moose overrides this method from C<Class::MOP::Class> and attempts to |
816 | fix some incompatibilities before doing the check. |
817 | |
11c86f15 |
818 | =item B<throw_error $message, %extra> |
819 | |
820 | Throws the error created by C<create_error> using C<raise_error> |
821 | |
822 | =item B<create_error $message, %extra> |
823 | |
824 | Creates an error message or object. |
825 | |
826 | The default behavior is C<create_error_confess>. |
827 | |
828 | If C<error_class> is set uses C<create_error_object>. Otherwise uses |
829 | C<error_builder> (a code reference or variant name), and calls the appropriate |
830 | C<create_error_$builder> method. |
831 | |
832 | =item B<error_builder $builder_name> |
833 | |
834 | Get or set the error builder. Defaults to C<confess>. |
835 | |
836 | =item B<error_class $class_name> |
837 | |
838 | Get or set the error class. Has no default. |
839 | |
840 | =item B<create_error_confess %args> |
841 | |
842 | Creates an error using L<Carp/longmess> |
843 | |
844 | =item B<create_error_croak %args> |
845 | |
846 | Creates an error using L<Carp/shortmess> |
847 | |
848 | =item B<create_error_object %args> |
849 | |
850 | Calls C<new> on the C<class> parameter in C<%args>. Usable with C<error_class> |
851 | to support custom error objects for your meta class. |
852 | |
853 | =item B<raise_error $error> |
854 | |
855 | Dies with an error object or string. |
856 | |
c0e30cf5 |
857 | =back |
858 | |
859 | =head1 BUGS |
860 | |
ac2dc464 |
861 | All complex software has bugs lurking in it, and this module is no |
c0e30cf5 |
862 | exception. If you find a bug please either email me, or add the bug |
863 | to cpan-RT. |
864 | |
c0e30cf5 |
865 | =head1 AUTHOR |
866 | |
867 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
868 | |
869 | =head1 COPYRIGHT AND LICENSE |
870 | |
778db3ac |
871 | Copyright 2006-2008 by Infinity Interactive, Inc. |
c0e30cf5 |
872 | |
873 | L<http://www.iinteractive.com> |
874 | |
875 | This library is free software; you can redistribute it and/or modify |
ac2dc464 |
876 | it under the same terms as Perl itself. |
c0e30cf5 |
877 | |
8a7a9c53 |
878 | =cut |
1a563243 |
879 | |