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 ); |
349cda54 |
11 | use List::MoreUtils qw( any all uniq first_index ); |
21f1e231 |
12 | use Scalar::Util 'weaken', 'blessed'; |
a15dff8d |
13 | |
e3d94ac0 |
14 | our $VERSION = '0.82'; |
e606ae5f |
15 | $VERSION = eval $VERSION; |
d44714be |
16 | our $AUTHORITY = 'cpan:STEVAN'; |
bc1e29b5 |
17 | |
74862722 |
18 | use Moose::Meta::Method::Overridden; |
3f9e4b0a |
19 | use Moose::Meta::Method::Augmented; |
bf6fa6b3 |
20 | use Moose::Error::Default; |
0fa70d03 |
21 | use Moose::Meta::Class::Immutable::Trait; |
22 | use Moose::Meta::Method::Constructor; |
23 | use Moose::Meta::Method::Destructor; |
8ee73eeb |
24 | |
c0e30cf5 |
25 | use base 'Class::MOP::Class'; |
26 | |
598340d5 |
27 | __PACKAGE__->meta->add_attribute('roles' => ( |
ef333f17 |
28 | reader => 'roles', |
29 | default => sub { [] } |
30 | )); |
31 | |
a9b63d79 |
32 | __PACKAGE__->meta->add_attribute('role_applications' => ( |
639f9a1a |
33 | reader => '_get_role_applications', |
a9b63d79 |
34 | default => sub { [] } |
35 | )); |
36 | |
0fa70d03 |
37 | __PACKAGE__->meta->add_attribute( |
38 | Class::MOP::Attribute->new('immutable_trait' => ( |
39 | accessor => "immutable_trait", |
40 | default => 'Moose::Meta::Class::Immutable::Trait', |
41 | )) |
42 | ); |
43 | |
e606ae5f |
44 | __PACKAGE__->meta->add_attribute('constructor_class' => ( |
45 | accessor => 'constructor_class', |
e0001338 |
46 | default => 'Moose::Meta::Method::Constructor', |
e606ae5f |
47 | )); |
48 | |
49 | __PACKAGE__->meta->add_attribute('destructor_class' => ( |
50 | accessor => 'destructor_class', |
e0001338 |
51 | default => 'Moose::Meta::Method::Destructor', |
e606ae5f |
52 | )); |
53 | |
11c86f15 |
54 | __PACKAGE__->meta->add_attribute('error_class' => ( |
bf6fa6b3 |
55 | accessor => 'error_class', |
56 | default => 'Moose::Error::Default', |
11c86f15 |
57 | )); |
58 | |
590868a3 |
59 | sub initialize { |
60 | my $class = shift; |
61 | my $pkg = shift; |
d03bd989 |
62 | return Class::MOP::get_metaclass_by_name($pkg) |
685f7e44 |
63 | || $class->SUPER::initialize($pkg, |
64 | 'attribute_metaclass' => 'Moose::Meta::Attribute', |
65 | 'method_metaclass' => 'Moose::Meta::Method', |
66 | 'instance_metaclass' => 'Moose::Meta::Instance', |
67 | @_ |
d03bd989 |
68 | ); |
ac2dc464 |
69 | } |
590868a3 |
70 | |
0fa70d03 |
71 | sub _immutable_options { |
72 | my ( $self, @args ) = @_; |
73 | |
74 | $self->SUPER::_immutable_options( |
75 | inline_destructor => 1, |
76 | |
77 | # Moose always does this when an attribute is created |
78 | inline_accessors => 0, |
79 | |
80 | @args, |
81 | ); |
82 | } |
83 | |
61bdd94f |
84 | sub create { |
85 | my ($self, $package_name, %options) = @_; |
d03bd989 |
86 | |
61bdd94f |
87 | (ref $options{roles} eq 'ARRAY') |
11c86f15 |
88 | || $self->throw_error("You must pass an ARRAY ref of roles", data => $options{roles}) |
61bdd94f |
89 | if exists $options{roles}; |
310ba883 |
90 | my $roles = delete $options{roles}; |
dd37a5be |
91 | |
61bdd94f |
92 | my $class = $self->SUPER::create($package_name, %options); |
dd37a5be |
93 | |
310ba883 |
94 | if ($roles) { |
95 | Moose::Util::apply_all_roles( $class, @$roles ); |
61bdd94f |
96 | } |
d03bd989 |
97 | |
61bdd94f |
98 | return $class; |
99 | } |
100 | |
6a4a7c31 |
101 | sub _check_metaclass_compatibility { |
2b72f3b4 |
102 | my $self = shift; |
103 | |
104 | if ( my @supers = $self->superclasses ) { |
105 | $self->_fix_metaclass_incompatibility(@supers); |
106 | } |
107 | |
6a4a7c31 |
108 | $self->SUPER::_check_metaclass_compatibility(@_); |
2b72f3b4 |
109 | } |
110 | |
17594769 |
111 | my %ANON_CLASSES; |
112 | |
113 | sub create_anon_class { |
114 | my ($self, %options) = @_; |
115 | |
116 | my $cache_ok = delete $options{cache}; |
d03bd989 |
117 | |
17594769 |
118 | # something like Super::Class|Super::Class::2=Role|Role::1 |
119 | my $cache_key = join '=' => ( |
11aaed6c |
120 | join('|', @{$options{superclasses} || []}), |
121 | join('|', sort @{$options{roles} || []}), |
17594769 |
122 | ); |
d03bd989 |
123 | |
6d5cbd2b |
124 | if ($cache_ok && defined $ANON_CLASSES{$cache_key}) { |
17594769 |
125 | return $ANON_CLASSES{$cache_key}; |
126 | } |
d03bd989 |
127 | |
17594769 |
128 | my $new_class = $self->SUPER::create_anon_class(%options); |
129 | |
6d5cbd2b |
130 | $ANON_CLASSES{$cache_key} = $new_class |
131 | if $cache_ok; |
17594769 |
132 | |
133 | return $new_class; |
134 | } |
135 | |
ef333f17 |
136 | sub add_role { |
137 | my ($self, $role) = @_; |
138 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
11c86f15 |
139 | || $self->throw_error("Roles must be instances of Moose::Meta::Role", data => $role); |
ef333f17 |
140 | push @{$self->roles} => $role; |
141 | } |
142 | |
639f9a1a |
143 | sub role_applications { |
144 | my ($self) = @_; |
145 | |
146 | return @{$self->_get_role_applications}; |
147 | } |
148 | |
a9b63d79 |
149 | sub add_role_application { |
150 | my ($self, $application) = @_; |
151 | (blessed($application) && $application->isa('Moose::Meta::Role::Application::ToClass')) |
152 | || $self->throw_error("Role applications must be instances of Moose::Meta::Role::Application::ToClass", data => $application); |
639f9a1a |
153 | push @{$self->_get_role_applications} => $application; |
a9b63d79 |
154 | } |
155 | |
b8aeb4dc |
156 | sub calculate_all_roles { |
157 | my $self = shift; |
158 | my %seen; |
159 | grep { !$seen{$_->name}++ } map { $_->calculate_all_roles } @{ $self->roles }; |
160 | } |
161 | |
ef333f17 |
162 | sub does_role { |
163 | my ($self, $role_name) = @_; |
322abb07 |
164 | |
ef333f17 |
165 | (defined $role_name) |
11c86f15 |
166 | || $self->throw_error("You must supply a role name to look for"); |
322abb07 |
167 | |
9c429218 |
168 | foreach my $class ($self->class_precedence_list) { |
322abb07 |
169 | my $meta = Class::MOP::class_of($class); |
3d0f5a27 |
170 | # when a Moose metaclass is itself extended with a role, |
171 | # this check needs to be done since some items in the |
172 | # class_precedence_list might in fact be Class::MOP |
173 | # based still. |
322abb07 |
174 | next unless $meta && $meta->can('roles'); |
175 | foreach my $role (@{$meta->roles}) { |
9c429218 |
176 | return 1 if $role->does_role($role_name); |
177 | } |
ef333f17 |
178 | } |
179 | return 0; |
180 | } |
181 | |
d79e62fd |
182 | sub excludes_role { |
183 | my ($self, $role_name) = @_; |
ebfc4d0f |
184 | |
d79e62fd |
185 | (defined $role_name) |
11c86f15 |
186 | || $self->throw_error("You must supply a role name to look for"); |
ebfc4d0f |
187 | |
ac2dc464 |
188 | foreach my $class ($self->class_precedence_list) { |
ebfc4d0f |
189 | my $meta = Class::MOP::class_of($class); |
190 | # when a Moose metaclass is itself extended with a role, |
191 | # this check needs to be done since some items in the |
192 | # class_precedence_list might in fact be Class::MOP |
193 | # based still. |
194 | next unless $meta && $meta->can('roles'); |
195 | foreach my $role (@{$meta->roles}) { |
9c429218 |
196 | return 1 if $role->excludes_role($role_name); |
197 | } |
d79e62fd |
198 | } |
199 | return 0; |
200 | } |
201 | |
8c9d74e7 |
202 | sub new_object { |
1308deb4 |
203 | my $class = shift; |
e606ae5f |
204 | my $params = @_ == 1 ? $_[0] : {@_}; |
1308deb4 |
205 | my $self = $class->SUPER::new_object($params); |
206 | |
b2df9268 |
207 | foreach my $attr ( $class->get_all_attributes() ) { |
1308deb4 |
208 | |
209 | next unless $attr->can('has_trigger') && $attr->has_trigger; |
210 | |
211 | my $init_arg = $attr->init_arg; |
212 | |
213 | next unless defined $init_arg; |
214 | |
215 | next unless exists $params->{$init_arg}; |
216 | |
217 | $attr->trigger->( |
218 | $self, |
219 | ( |
220 | $attr->should_coerce |
221 | ? $attr->get_read_method_ref->($self) |
222 | : $params->{$init_arg} |
223 | ), |
1308deb4 |
224 | ); |
8c9d74e7 |
225 | } |
1308deb4 |
226 | |
ac2dc464 |
227 | return $self; |
8c9d74e7 |
228 | } |
229 | |
e2eef3a5 |
230 | sub superclasses { |
231 | my $self = shift; |
232 | my @supers = @_; |
233 | foreach my $super (@supers) { |
c8d9f1e2 |
234 | Class::MOP::load_class($super); |
235 | my $meta = Class::MOP::class_of($super); |
e2eef3a5 |
236 | Moose->throw_error("You cannot inherit from a Moose Role ($super)") |
237 | if $meta && $meta->isa('Moose::Meta::Role') |
238 | } |
239 | return $self->SUPER::superclasses(@supers); |
240 | } |
241 | |
093b12c2 |
242 | ### --------------------------------------------- |
243 | |
a2eec5e7 |
244 | sub add_attribute { |
245 | my $self = shift; |
e472c9a5 |
246 | $self->SUPER::add_attribute( |
247 | (blessed $_[0] && $_[0]->isa('Class::MOP::Attribute') |
d03bd989 |
248 | ? $_[0] |
249 | : $self->_process_attribute(@_)) |
e472c9a5 |
250 | ); |
a2eec5e7 |
251 | } |
252 | |
78cd1d3b |
253 | sub add_override_method_modifier { |
254 | my ($self, $name, $method, $_super_package) = @_; |
18c2ec0e |
255 | |
d05cd563 |
256 | (!$self->has_method($name)) |
11c86f15 |
257 | || $self->throw_error("Cannot add an override method if a local method is already present"); |
18c2ec0e |
258 | |
74862722 |
259 | $self->add_method($name => Moose::Meta::Method::Overridden->new( |
3f9e4b0a |
260 | method => $method, |
261 | class => $self, |
262 | package => $_super_package, # need this for roles |
263 | name => $name, |
18c2ec0e |
264 | )); |
78cd1d3b |
265 | } |
266 | |
267 | sub add_augment_method_modifier { |
ac2dc464 |
268 | my ($self, $name, $method) = @_; |
d05cd563 |
269 | (!$self->has_method($name)) |
11c86f15 |
270 | || $self->throw_error("Cannot add an augment method if a local method is already present"); |
3f9e4b0a |
271 | |
272 | $self->add_method($name => Moose::Meta::Method::Augmented->new( |
273 | method => $method, |
274 | class => $self, |
275 | name => $name, |
276 | )); |
78cd1d3b |
277 | } |
278 | |
1341f10c |
279 | ## Private Utility methods ... |
280 | |
05d9eaf6 |
281 | sub _find_next_method_by_name_which_is_not_overridden { |
282 | my ($self, $name) = @_; |
68efb014 |
283 | foreach my $method ($self->find_all_methods_by_name($name)) { |
ac2dc464 |
284 | return $method->{code} |
74862722 |
285 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overridden'); |
05d9eaf6 |
286 | } |
287 | return undef; |
288 | } |
289 | |
41419b9e |
290 | sub _fix_metaclass_incompatibility { |
1341f10c |
291 | my ($self, @superclasses) = @_; |
e606ae5f |
292 | |
1341f10c |
293 | foreach my $super (@superclasses) { |
349cda54 |
294 | my $meta = Class::MOP::Class->initialize($super); |
295 | |
296 | my @all_supers = $meta->linearized_isa; |
cb311121 |
297 | shift @all_supers; |
298 | |
299 | my @super_metas_to_fix = ($meta); |
300 | |
301 | # We need to check & fix the immediate superclass. If its @ISA |
302 | # contains a class without a metaclass instance, followed by a |
303 | # class _with_ a metaclass instance, init a metaclass instance |
304 | # for classes without one and fix compat up to and including |
305 | # the class which was already initialized. |
349cda54 |
306 | my $idx = first_index { Class::MOP::class_of($_) } @all_supers; |
cb311121 |
307 | |
308 | push @super_metas_to_fix, |
309 | map { Class::MOP::Class->initialize($_) } @all_supers[ 0 .. $idx ] |
310 | if $idx >= 0; |
349cda54 |
311 | |
312 | foreach my $super_meta (@super_metas_to_fix) { |
313 | $self->_fix_one_incompatible_metaclass($super_meta); |
1341f10c |
314 | } |
349cda54 |
315 | } |
316 | } |
317 | |
318 | sub _fix_one_incompatible_metaclass { |
319 | my ($self, $meta) = @_; |
e606ae5f |
320 | |
349cda54 |
321 | return if $self->_superclass_meta_is_compatible($meta); |
322 | |
323 | unless ( $self->is_pristine ) { |
324 | $self->throw_error( |
325 | "Cannot attempt to reinitialize metaclass for " |
326 | . $self->name |
327 | . ", it isn't pristine" ); |
f8b6827f |
328 | } |
cb311121 |
329 | |
349cda54 |
330 | $self->_reconcile_with_superclass_meta($meta); |
f8b6827f |
331 | } |
332 | |
333 | sub _superclass_meta_is_compatible { |
349cda54 |
334 | my ($self, $super_meta) = @_; |
f8b6827f |
335 | |
336 | next unless $super_meta->isa("Class::MOP::Class"); |
337 | |
338 | my $super_meta_name |
339 | = $super_meta->is_immutable |
340 | ? $super_meta->get_mutable_metaclass_name |
341 | : ref($super_meta); |
342 | |
343 | return 1 |
344 | if $self->isa($super_meta_name) |
345 | and |
346 | $self->instance_metaclass->isa( $super_meta->instance_metaclass ); |
347 | } |
348 | |
349 | # I don't want to have to type this >1 time |
350 | my @MetaClassTypes = |
3e334262 |
351 | qw( attribute_metaclass |
352 | method_metaclass |
353 | wrapped_method_metaclass |
354 | instance_metaclass |
355 | constructor_class |
356 | destructor_class |
357 | error_class ); |
f8b6827f |
358 | |
359 | sub _reconcile_with_superclass_meta { |
349cda54 |
360 | my ($self, $super_meta) = @_; |
f8b6827f |
361 | |
dd37a5be |
362 | my $super_meta_name |
f8b6827f |
363 | = $super_meta->is_immutable |
364 | ? $super_meta->get_mutable_metaclass_name |
365 | : ref($super_meta); |
e606ae5f |
366 | |
f8b6827f |
367 | my $self_metaclass = ref $self; |
368 | |
369 | # If neither of these is true we have a more serious |
370 | # incompatibility that we just cannot fix (yet?). |
dd37a5be |
371 | if ( $super_meta_name->isa( ref $self ) |
f8b6827f |
372 | && all { $super_meta->$_->isa( $self->$_ ) } @MetaClassTypes ) { |
0635500e |
373 | $self->_reinitialize_with($super_meta); |
f8b6827f |
374 | } |
375 | elsif ( $self->_all_metaclasses_differ_by_roles_only($super_meta) ) { |
0635500e |
376 | $self->_reconcile_role_differences($super_meta); |
1341f10c |
377 | } |
1341f10c |
378 | } |
379 | |
f8b6827f |
380 | sub _reinitialize_with { |
381 | my ( $self, $new_meta ) = @_; |
382 | |
0635500e |
383 | my $new_self = $new_meta->reinitialize( |
f8b6827f |
384 | $self->name, |
385 | attribute_metaclass => $new_meta->attribute_metaclass, |
386 | method_metaclass => $new_meta->method_metaclass, |
387 | instance_metaclass => $new_meta->instance_metaclass, |
388 | ); |
389 | |
8b1d510f |
390 | $new_self->$_( $new_meta->$_ ) |
391 | for qw( constructor_class destructor_class error_class ); |
f8b6827f |
392 | |
0635500e |
393 | %$self = %$new_self; |
394 | |
395 | bless $self, ref $new_self; |
396 | |
4c5fcc12 |
397 | # We need to replace the cached metaclass instance or else when it |
398 | # goes out of scope Class::MOP::Class destroy's the namespace for |
399 | # the metaclass's class, causing much havoc. |
0635500e |
400 | Class::MOP::store_metaclass_by_name( $self->name, $self ); |
4c5fcc12 |
401 | Class::MOP::weaken_metaclass( $self->name ) if $self->is_anon_class; |
f8b6827f |
402 | } |
403 | |
404 | # In the more complex case, we share a common ancestor with our |
405 | # superclass's metaclass, but each metaclass (ours and the parent's) |
406 | # has a different set of roles applied. We reconcile this by first |
407 | # reinitializing into the parent class, and _then_ applying our own |
408 | # roles. |
409 | sub _all_metaclasses_differ_by_roles_only { |
410 | my ($self, $super_meta) = @_; |
411 | |
412 | for my $pair ( |
413 | [ ref $self, ref $super_meta ], |
414 | map { [ $self->$_, $super_meta->$_ ] } @MetaClassTypes |
415 | ) { |
416 | |
417 | next if $pair->[0] eq $pair->[1]; |
418 | |
419 | my $self_meta_meta = Class::MOP::Class->initialize( $pair->[0] ); |
420 | my $super_meta_meta = Class::MOP::Class->initialize( $pair->[1] ); |
421 | |
422 | my $common_ancestor |
423 | = _find_common_ancestor( $self_meta_meta, $super_meta_meta ); |
424 | |
425 | return unless $common_ancestor; |
426 | |
427 | return |
428 | unless _is_role_only_subclass_of( |
429 | $self_meta_meta, |
430 | $common_ancestor, |
431 | ) |
432 | && _is_role_only_subclass_of( |
433 | $super_meta_meta, |
434 | $common_ancestor, |
435 | ); |
436 | } |
437 | |
438 | return 1; |
439 | } |
440 | |
441 | # This, and some other functions, could be called as methods, but |
442 | # they're not for two reasons. One, we just end up ignoring the first |
443 | # argument, because we can't call these directly on one of the real |
444 | # arguments, because one of them could be a Class::MOP::Class object |
445 | # and not a Moose::Meta::Class. Second, only a completely insane |
446 | # person would attempt to subclass this stuff! |
447 | sub _find_common_ancestor { |
448 | my ($meta1, $meta2) = @_; |
449 | |
450 | # FIXME? This doesn't account for multiple inheritance (not sure |
451 | # if it needs to though). For example, is somewhere in $meta1's |
db9fda52 |
452 | # history it inherits from both ClassA and ClassB, and $meta2 |
f8b6827f |
453 | # inherits from ClassB & ClassA, does it matter? And what crazy |
454 | # fool would do that anyway? |
455 | |
456 | my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa; |
457 | |
458 | return first { $meta1_parents{$_} } $meta2->linearized_isa; |
459 | } |
460 | |
461 | sub _is_role_only_subclass_of { |
462 | my ($meta, $ancestor) = @_; |
463 | |
464 | return 1 if $meta->name eq $ancestor; |
465 | |
466 | my @roles = _all_roles_until( $meta, $ancestor ); |
467 | |
468 | my %role_packages = map { $_->name => 1 } @roles; |
469 | |
470 | my $ancestor_meta = Class::MOP::Class->initialize($ancestor); |
471 | |
472 | my %shared_ancestors = map { $_ => 1 } $ancestor_meta->linearized_isa; |
473 | |
474 | for my $method ( $meta->get_all_methods() ) { |
475 | next if $method->name eq 'meta'; |
476 | next if $method->can('associated_attribute'); |
477 | |
478 | next |
479 | if $role_packages{ $method->original_package_name } |
480 | || $shared_ancestors{ $method->original_package_name }; |
481 | |
482 | return 0; |
483 | } |
484 | |
485 | # FIXME - this really isn't right. Just because an attribute is |
486 | # defined in a role doesn't mean it isn't _also_ defined in the |
487 | # subclass. |
488 | for my $attr ( $meta->get_all_attributes ) { |
489 | next if $shared_ancestors{ $attr->associated_class->name }; |
490 | |
491 | next if any { $_->has_attribute( $attr->name ) } @roles; |
492 | |
493 | return 0; |
494 | } |
495 | |
496 | return 1; |
497 | } |
498 | |
499 | sub _all_roles { |
500 | my $meta = shift; |
501 | |
502 | return _all_roles_until($meta); |
503 | } |
504 | |
505 | sub _all_roles_until { |
506 | my ($meta, $stop_at_class) = @_; |
507 | |
508 | return unless $meta->can('calculate_all_roles'); |
509 | |
510 | my @roles = $meta->calculate_all_roles; |
511 | |
512 | for my $class ( $meta->linearized_isa ) { |
513 | last if $stop_at_class && $stop_at_class eq $class; |
514 | |
515 | my $meta = Class::MOP::Class->initialize($class); |
516 | last unless $meta->can('calculate_all_roles'); |
517 | |
518 | push @roles, $meta->calculate_all_roles; |
519 | } |
520 | |
8b1d510f |
521 | return uniq @roles; |
f8b6827f |
522 | } |
523 | |
524 | sub _reconcile_role_differences { |
525 | my ($self, $super_meta) = @_; |
526 | |
3897e146 |
527 | my $self_meta = Class::MOP::class_of($self); |
f8b6827f |
528 | |
529 | my %roles; |
530 | |
531 | if ( my @roles = map { $_->name } _all_roles($self_meta) ) { |
532 | $roles{metaclass_roles} = \@roles; |
533 | } |
534 | |
535 | for my $thing (@MetaClassTypes) { |
536 | my $name = $self->$thing(); |
537 | |
538 | my $thing_meta = Class::MOP::Class->initialize($name); |
539 | |
540 | my @roles = map { $_->name } _all_roles($thing_meta) |
541 | or next; |
542 | |
543 | $roles{ $thing . '_roles' } = \@roles; |
544 | } |
545 | |
2b72f3b4 |
546 | $self->_reinitialize_with($super_meta); |
f8b6827f |
547 | |
548 | Moose::Util::MetaRole::apply_metaclass_roles( |
549 | for_class => $self->name, |
550 | %roles, |
551 | ); |
552 | |
553 | return $self; |
554 | } |
555 | |
1341f10c |
556 | sub _process_attribute { |
a3738e5b |
557 | my ( $self, $name, @args ) = @_; |
7e59b803 |
558 | |
559 | @args = %{$args[0]} if scalar @args == 1 && ref($args[0]) eq 'HASH'; |
d9bb6c63 |
560 | |
f9b5f5f8 |
561 | if (($name || '') =~ /^\+(.*)/) { |
7e59b803 |
562 | return $self->_process_inherited_attribute($1, @args); |
1341f10c |
563 | } |
564 | else { |
7e59b803 |
565 | return $self->_process_new_attribute($name, @args); |
566 | } |
567 | } |
568 | |
569 | sub _process_new_attribute { |
570 | my ( $self, $name, @args ) = @_; |
7e59b803 |
571 | |
d5c30e52 |
572 | $self->attribute_metaclass->interpolate_class_and_new($name, @args); |
1341f10c |
573 | } |
574 | |
575 | sub _process_inherited_attribute { |
576 | my ($self, $attr_name, %options) = @_; |
577 | my $inherited_attr = $self->find_attribute_by_name($attr_name); |
578 | (defined $inherited_attr) |
329c5dd4 |
579 | || $self->throw_error("Could not find an attribute by the name of '$attr_name' to inherit from in ${\$self->name}", data => $attr_name); |
1341f10c |
580 | if ($inherited_attr->isa('Moose::Meta::Attribute')) { |
d7d8a8c7 |
581 | return $inherited_attr->clone_and_inherit_options(%options); |
1341f10c |
582 | } |
583 | else { |
584 | # NOTE: |
585 | # kind of a kludge to handle Class::MOP::Attributes |
d7d8a8c7 |
586 | return $inherited_attr->Moose::Meta::Attribute::clone_and_inherit_options(%options); |
ac2dc464 |
587 | } |
1341f10c |
588 | } |
589 | |
5cf3dbcf |
590 | ## ------------------------------------------------- |
591 | |
bf6fa6b3 |
592 | our $error_level; |
11c86f15 |
593 | |
594 | sub throw_error { |
595 | my ( $self, @args ) = @_; |
bf6fa6b3 |
596 | local $error_level = ($error_level || 0) + 1; |
11c86f15 |
597 | $self->raise_error($self->create_error(@args)); |
598 | } |
599 | |
600 | sub raise_error { |
601 | my ( $self, @args ) = @_; |
602 | die @args; |
603 | } |
604 | |
605 | sub create_error { |
606 | my ( $self, @args ) = @_; |
607 | |
18748ad6 |
608 | require Carp::Heavy; |
609 | |
bf6fa6b3 |
610 | local $error_level = ($error_level || 0 ) + 1; |
18748ad6 |
611 | |
11c86f15 |
612 | if ( @args % 2 == 1 ) { |
613 | unshift @args, "message"; |
614 | } |
615 | |
fcab1742 |
616 | my %args = ( metaclass => $self, last_error => $@, @args ); |
11c86f15 |
617 | |
bf6fa6b3 |
618 | $args{depth} += $error_level; |
11c86f15 |
619 | |
bf6fa6b3 |
620 | my $class = ref $self ? $self->error_class : "Moose::Error::Default"; |
11c86f15 |
621 | |
a810a01f |
622 | Class::MOP::load_class($class); |
623 | |
11c86f15 |
624 | $class->new( |
bf6fa6b3 |
625 | Carp::caller_info($args{depth}), |
626 | %args |
11c86f15 |
627 | ); |
628 | } |
629 | |
c0e30cf5 |
630 | 1; |
631 | |
632 | __END__ |
633 | |
634 | =pod |
635 | |
636 | =head1 NAME |
637 | |
e522431d |
638 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
639 | |
c0e30cf5 |
640 | =head1 DESCRIPTION |
641 | |
70bb0f97 |
642 | This class is a subclass of L<Class::MOP::Class> that provides |
643 | additional Moose-specific functionality. |
e522431d |
644 | |
7854b409 |
645 | To really understand this class, you will need to start with the |
646 | L<Class::MOP::Class> documentation. This class can be understood as a |
647 | set of additional features on top of the basic feature provided by |
648 | that parent class. |
6ba6d68c |
649 | |
d4b1449e |
650 | =head1 INHERITANCE |
651 | |
652 | C<Moose::Meta::Class> is a subclass of L<Class::MOP::Class>. |
653 | |
c0e30cf5 |
654 | =head1 METHODS |
655 | |
656 | =over 4 |
657 | |
70bb0f97 |
658 | =item B<< Moose::Meta::Class->initialize($package_name, %options) >> |
590868a3 |
659 | |
70bb0f97 |
660 | This overrides the parent's method in order to provide its own |
661 | defaults for the C<attribute_metaclass>, C<instance_metaclass>, and |
662 | C<method_metaclass> options. |
61bdd94f |
663 | |
70bb0f97 |
664 | These all default to the appropriate Moose class. |
61bdd94f |
665 | |
70bb0f97 |
666 | =item B<< Moose::Meta::Class->create($package_name, %options) >> |
17594769 |
667 | |
70bb0f97 |
668 | This overrides the parent's method in order to accept a C<roles> |
669 | option. This should be an array reference containing one more roles |
670 | that the class does. |
17594769 |
671 | |
70bb0f97 |
672 | my $metaclass = Moose::Meta::Class->create( 'New::Class', roles => [...] ); |
17594769 |
673 | |
70bb0f97 |
674 | =item B<< Moose::Meta::Class->create_anon_class >> |
17594769 |
675 | |
70bb0f97 |
676 | This overrides the parent's method to accept a C<roles> option, just |
677 | as C<create> does. |
5cf3dbcf |
678 | |
70bb0f97 |
679 | It also accepts a C<cache> option. If this is true, then the anonymous |
680 | class will be cached based on its superclasses and roles. If an |
681 | existing anonymous class in the cache has the same superclasses and |
682 | roles, it will be reused. |
ac2dc464 |
683 | |
70bb0f97 |
684 | my $metaclass = Moose::Meta::Class->create_anon_class( |
685 | superclasses => ['Foo'], |
686 | roles => [qw/Some Roles Go Here/], |
687 | cache => 1, |
688 | ); |
ac2dc464 |
689 | |
70bb0f97 |
690 | =item B<< $metaclass->make_immutable(%options) >> |
ac2dc464 |
691 | |
70bb0f97 |
692 | This overrides the parent's method to add a few options. Specifically, |
693 | it uses the Moose-specific constructor and destructor classes, and |
694 | enables inlining the destructor. |
8c9d74e7 |
695 | |
70bb0f97 |
696 | Also, since Moose always inlines attributes, it sets the |
697 | C<inline_accessors> option to false. |
02a0fb52 |
698 | |
70bb0f97 |
699 | =item B<< $metaclass->new_object(%params) >> |
a15dff8d |
700 | |
70bb0f97 |
701 | This overrides the parent's method in order to add support for |
702 | attribute triggers. |
6ba6d68c |
703 | |
70bb0f97 |
704 | =item B<< $metaclass->add_override_method_modifier($name, $sub) >> |
ef1d5f4b |
705 | |
70bb0f97 |
706 | This adds an C<override> method modifier to the package. |
e9ec68d6 |
707 | |
70bb0f97 |
708 | =item B<< $metaclass->add_augment_method_modifier($name, $sub) >> |
e9ec68d6 |
709 | |
70bb0f97 |
710 | This adds an C<augment> method modifier to the package. |
78cd1d3b |
711 | |
70bb0f97 |
712 | =item B<< $metaclass->calculate_all_roles >> |
02a0fb52 |
713 | |
70bb0f97 |
714 | This will return a unique array of C<Moose::Meta::Role> instances |
715 | which are attached to this class. |
78cd1d3b |
716 | |
70bb0f97 |
717 | =item B<< $metaclass->add_role($role) >> |
02a0fb52 |
718 | |
70bb0f97 |
719 | This takes a L<Moose::Meta::Role> object, and adds it to the class's |
720 | list of roles. This I<does not> actually apply the role to the class. |
2b14ac61 |
721 | |
b90dd4ef |
722 | =item B<< $metaclass->role_applications >> |
723 | |
639f9a1a |
724 | Returns a list of L<Moose::Meta::Role::Application::ToClass> |
b90dd4ef |
725 | objects, which contain the arguments to role application. |
726 | |
727 | =item B<< $metaclass->add_role_application($application) >> |
728 | |
729 | This takes a L<Moose::Meta::Role::Application::ToClass> object, and |
730 | adds it to the class's list of role applications. This I<does not> |
731 | actually apply any role to the class; it is only for tracking role |
732 | applications. |
733 | |
70bb0f97 |
734 | =item B<< $metaclass->does_role($role_name) >> |
ef333f17 |
735 | |
70bb0f97 |
736 | This returns a boolean indicating whether or not the class does the |
737 | specified role. This tests both the class and its parents. |
02a0fb52 |
738 | |
70bb0f97 |
739 | =item B<< $metaclass->excludes_role($role_name) >> |
ef333f17 |
740 | |
70bb0f97 |
741 | A class excludes a role if it has already composed a role which |
742 | excludes the named role. This tests both the class and its parents. |
02a0fb52 |
743 | |
70bb0f97 |
744 | =item B<< $metaclass->add_attribute($attr_name, %params|$params) >> |
ef333f17 |
745 | |
70bb0f97 |
746 | This overrides the parent's method in order to allow the parameters to |
747 | be provided as a hash reference. |
02a0fb52 |
748 | |
70bb0f97 |
749 | =item B<< $metaclass->constructor_class ($class_name) >> |
d79e62fd |
750 | |
70bb0f97 |
751 | =item B<< $metaclass->destructor_class ($class_name) >> |
e606ae5f |
752 | |
753 | These are the names of classes used when making a class |
754 | immutable. These default to L<Moose::Meta::Method::Constructor> and |
755 | L<Moose::Meta::Method::Destructor> respectively. These accessors are |
756 | read-write, so you can use them to change the class name. |
757 | |
70bb0f97 |
758 | =item B<< $metaclass->error_class($class_name) >> |
8b1d510f |
759 | |
70bb0f97 |
760 | The name of the class used to throw errors. This defaults to |
8b1d510f |
761 | L<Moose::Error::Default>, which generates an error with a stacktrace |
762 | just like C<Carp::confess>. |
763 | |
70bb0f97 |
764 | =item B<< $metaclass->throw_error($message, %extra) >> |
11c86f15 |
765 | |
766 | Throws the error created by C<create_error> using C<raise_error> |
767 | |
c0e30cf5 |
768 | =back |
769 | |
770 | =head1 BUGS |
771 | |
ac2dc464 |
772 | All complex software has bugs lurking in it, and this module is no |
c0e30cf5 |
773 | exception. If you find a bug please either email me, or add the bug |
774 | to cpan-RT. |
775 | |
c0e30cf5 |
776 | =head1 AUTHOR |
777 | |
778 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
779 | |
780 | =head1 COPYRIGHT AND LICENSE |
781 | |
2840a3b2 |
782 | Copyright 2006-2009 by Infinity Interactive, Inc. |
c0e30cf5 |
783 | |
784 | L<http://www.iinteractive.com> |
785 | |
786 | This library is free software; you can redistribute it and/or modify |
ac2dc464 |
787 | it under the same terms as Perl itself. |
c0e30cf5 |
788 | |
8a7a9c53 |
789 | =cut |
1a563243 |
790 | |