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 | |
92d82041 |
14 | our $VERSION = '0.87'; |
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; |
0fa70d03 |
20 | use Moose::Meta::Class::Immutable::Trait; |
21 | use Moose::Meta::Method::Constructor; |
22 | use Moose::Meta::Method::Destructor; |
8ee73eeb |
23 | |
c0e30cf5 |
24 | use base 'Class::MOP::Class'; |
25 | |
598340d5 |
26 | __PACKAGE__->meta->add_attribute('roles' => ( |
ef333f17 |
27 | reader => 'roles', |
28 | default => sub { [] } |
29 | )); |
30 | |
a9b63d79 |
31 | __PACKAGE__->meta->add_attribute('role_applications' => ( |
639f9a1a |
32 | reader => '_get_role_applications', |
a9b63d79 |
33 | default => sub { [] } |
34 | )); |
35 | |
0fa70d03 |
36 | __PACKAGE__->meta->add_attribute( |
37 | Class::MOP::Attribute->new('immutable_trait' => ( |
38 | accessor => "immutable_trait", |
39 | default => 'Moose::Meta::Class::Immutable::Trait', |
40 | )) |
41 | ); |
42 | |
e606ae5f |
43 | __PACKAGE__->meta->add_attribute('constructor_class' => ( |
44 | accessor => 'constructor_class', |
e0001338 |
45 | default => 'Moose::Meta::Method::Constructor', |
e606ae5f |
46 | )); |
47 | |
48 | __PACKAGE__->meta->add_attribute('destructor_class' => ( |
49 | accessor => 'destructor_class', |
e0001338 |
50 | default => 'Moose::Meta::Method::Destructor', |
e606ae5f |
51 | )); |
52 | |
11c86f15 |
53 | __PACKAGE__->meta->add_attribute('error_class' => ( |
bf6fa6b3 |
54 | accessor => 'error_class', |
55 | default => 'Moose::Error::Default', |
11c86f15 |
56 | )); |
57 | |
590868a3 |
58 | sub initialize { |
59 | my $class = shift; |
60 | my $pkg = shift; |
d03bd989 |
61 | return Class::MOP::get_metaclass_by_name($pkg) |
685f7e44 |
62 | || $class->SUPER::initialize($pkg, |
63 | 'attribute_metaclass' => 'Moose::Meta::Attribute', |
64 | 'method_metaclass' => 'Moose::Meta::Method', |
65 | 'instance_metaclass' => 'Moose::Meta::Instance', |
66 | @_ |
d03bd989 |
67 | ); |
ac2dc464 |
68 | } |
590868a3 |
69 | |
0fa70d03 |
70 | sub _immutable_options { |
71 | my ( $self, @args ) = @_; |
72 | |
73 | $self->SUPER::_immutable_options( |
74 | inline_destructor => 1, |
75 | |
76 | # Moose always does this when an attribute is created |
77 | inline_accessors => 0, |
78 | |
79 | @args, |
80 | ); |
81 | } |
82 | |
61bdd94f |
83 | sub create { |
84 | my ($self, $package_name, %options) = @_; |
d03bd989 |
85 | |
61bdd94f |
86 | (ref $options{roles} eq 'ARRAY') |
11c86f15 |
87 | || $self->throw_error("You must pass an ARRAY ref of roles", data => $options{roles}) |
61bdd94f |
88 | if exists $options{roles}; |
310ba883 |
89 | my $roles = delete $options{roles}; |
dd37a5be |
90 | |
61bdd94f |
91 | my $class = $self->SUPER::create($package_name, %options); |
dd37a5be |
92 | |
310ba883 |
93 | if ($roles) { |
94 | Moose::Util::apply_all_roles( $class, @$roles ); |
61bdd94f |
95 | } |
d03bd989 |
96 | |
61bdd94f |
97 | return $class; |
98 | } |
99 | |
6a4a7c31 |
100 | sub _check_metaclass_compatibility { |
2b72f3b4 |
101 | my $self = shift; |
102 | |
103 | if ( my @supers = $self->superclasses ) { |
104 | $self->_fix_metaclass_incompatibility(@supers); |
105 | } |
106 | |
6a4a7c31 |
107 | $self->SUPER::_check_metaclass_compatibility(@_); |
2b72f3b4 |
108 | } |
109 | |
17594769 |
110 | my %ANON_CLASSES; |
111 | |
112 | sub create_anon_class { |
113 | my ($self, %options) = @_; |
114 | |
115 | my $cache_ok = delete $options{cache}; |
d03bd989 |
116 | |
17594769 |
117 | # something like Super::Class|Super::Class::2=Role|Role::1 |
118 | my $cache_key = join '=' => ( |
11aaed6c |
119 | join('|', @{$options{superclasses} || []}), |
120 | join('|', sort @{$options{roles} || []}), |
17594769 |
121 | ); |
d03bd989 |
122 | |
6d5cbd2b |
123 | if ($cache_ok && defined $ANON_CLASSES{$cache_key}) { |
17594769 |
124 | return $ANON_CLASSES{$cache_key}; |
125 | } |
d03bd989 |
126 | |
17594769 |
127 | my $new_class = $self->SUPER::create_anon_class(%options); |
128 | |
6d5cbd2b |
129 | $ANON_CLASSES{$cache_key} = $new_class |
130 | if $cache_ok; |
17594769 |
131 | |
132 | return $new_class; |
133 | } |
134 | |
ef333f17 |
135 | sub add_role { |
136 | my ($self, $role) = @_; |
137 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
11c86f15 |
138 | || $self->throw_error("Roles must be instances of Moose::Meta::Role", data => $role); |
ef333f17 |
139 | push @{$self->roles} => $role; |
140 | } |
141 | |
639f9a1a |
142 | sub role_applications { |
143 | my ($self) = @_; |
144 | |
145 | return @{$self->_get_role_applications}; |
146 | } |
147 | |
a9b63d79 |
148 | sub add_role_application { |
149 | my ($self, $application) = @_; |
150 | (blessed($application) && $application->isa('Moose::Meta::Role::Application::ToClass')) |
151 | || $self->throw_error("Role applications must be instances of Moose::Meta::Role::Application::ToClass", data => $application); |
639f9a1a |
152 | push @{$self->_get_role_applications} => $application; |
a9b63d79 |
153 | } |
154 | |
b8aeb4dc |
155 | sub calculate_all_roles { |
156 | my $self = shift; |
157 | my %seen; |
158 | grep { !$seen{$_->name}++ } map { $_->calculate_all_roles } @{ $self->roles }; |
159 | } |
160 | |
ef333f17 |
161 | sub does_role { |
162 | my ($self, $role_name) = @_; |
322abb07 |
163 | |
ef333f17 |
164 | (defined $role_name) |
11c86f15 |
165 | || $self->throw_error("You must supply a role name to look for"); |
322abb07 |
166 | |
9c429218 |
167 | foreach my $class ($self->class_precedence_list) { |
322abb07 |
168 | my $meta = Class::MOP::class_of($class); |
3d0f5a27 |
169 | # when a Moose metaclass is itself extended with a role, |
170 | # this check needs to be done since some items in the |
171 | # class_precedence_list might in fact be Class::MOP |
172 | # based still. |
322abb07 |
173 | next unless $meta && $meta->can('roles'); |
174 | foreach my $role (@{$meta->roles}) { |
9c429218 |
175 | return 1 if $role->does_role($role_name); |
176 | } |
ef333f17 |
177 | } |
178 | return 0; |
179 | } |
180 | |
d79e62fd |
181 | sub excludes_role { |
182 | my ($self, $role_name) = @_; |
ebfc4d0f |
183 | |
d79e62fd |
184 | (defined $role_name) |
11c86f15 |
185 | || $self->throw_error("You must supply a role name to look for"); |
ebfc4d0f |
186 | |
ac2dc464 |
187 | foreach my $class ($self->class_precedence_list) { |
ebfc4d0f |
188 | my $meta = Class::MOP::class_of($class); |
189 | # when a Moose metaclass is itself extended with a role, |
190 | # this check needs to be done since some items in the |
191 | # class_precedence_list might in fact be Class::MOP |
192 | # based still. |
193 | next unless $meta && $meta->can('roles'); |
194 | foreach my $role (@{$meta->roles}) { |
9c429218 |
195 | return 1 if $role->excludes_role($role_name); |
196 | } |
d79e62fd |
197 | } |
198 | return 0; |
199 | } |
200 | |
8c9d74e7 |
201 | sub new_object { |
1308deb4 |
202 | my $class = shift; |
e606ae5f |
203 | my $params = @_ == 1 ? $_[0] : {@_}; |
1308deb4 |
204 | my $self = $class->SUPER::new_object($params); |
205 | |
b2df9268 |
206 | foreach my $attr ( $class->get_all_attributes() ) { |
1308deb4 |
207 | |
208 | next unless $attr->can('has_trigger') && $attr->has_trigger; |
209 | |
210 | my $init_arg = $attr->init_arg; |
211 | |
212 | next unless defined $init_arg; |
213 | |
214 | next unless exists $params->{$init_arg}; |
215 | |
216 | $attr->trigger->( |
217 | $self, |
218 | ( |
219 | $attr->should_coerce |
220 | ? $attr->get_read_method_ref->($self) |
221 | : $params->{$init_arg} |
222 | ), |
1308deb4 |
223 | ); |
8c9d74e7 |
224 | } |
1308deb4 |
225 | |
ac2dc464 |
226 | return $self; |
8c9d74e7 |
227 | } |
228 | |
e2eef3a5 |
229 | sub superclasses { |
230 | my $self = shift; |
231 | my @supers = @_; |
232 | foreach my $super (@supers) { |
c8d9f1e2 |
233 | Class::MOP::load_class($super); |
234 | my $meta = Class::MOP::class_of($super); |
e2eef3a5 |
235 | Moose->throw_error("You cannot inherit from a Moose Role ($super)") |
236 | if $meta && $meta->isa('Moose::Meta::Role') |
237 | } |
238 | return $self->SUPER::superclasses(@supers); |
239 | } |
240 | |
093b12c2 |
241 | ### --------------------------------------------- |
242 | |
a2eec5e7 |
243 | sub add_attribute { |
244 | my $self = shift; |
28af3424 |
245 | my $attr = |
e472c9a5 |
246 | (blessed $_[0] && $_[0]->isa('Class::MOP::Attribute') |
d03bd989 |
247 | ? $_[0] |
28af3424 |
248 | : $self->_process_attribute(@_)); |
249 | $self->SUPER::add_attribute($attr); |
250 | # it may be a Class::MOP::Attribute, theoretically, which doesn't have |
251 | # 'bare' and doesn't implement this method |
9340e346 |
252 | if ($attr->can('_check_associated_methods')) { |
253 | $attr->_check_associated_methods; |
28af3424 |
254 | } |
255 | return $attr; |
a2eec5e7 |
256 | } |
257 | |
78cd1d3b |
258 | sub add_override_method_modifier { |
259 | my ($self, $name, $method, $_super_package) = @_; |
18c2ec0e |
260 | |
d05cd563 |
261 | (!$self->has_method($name)) |
11c86f15 |
262 | || $self->throw_error("Cannot add an override method if a local method is already present"); |
18c2ec0e |
263 | |
74862722 |
264 | $self->add_method($name => Moose::Meta::Method::Overridden->new( |
3f9e4b0a |
265 | method => $method, |
266 | class => $self, |
267 | package => $_super_package, # need this for roles |
268 | name => $name, |
18c2ec0e |
269 | )); |
78cd1d3b |
270 | } |
271 | |
272 | sub add_augment_method_modifier { |
ac2dc464 |
273 | my ($self, $name, $method) = @_; |
d05cd563 |
274 | (!$self->has_method($name)) |
11c86f15 |
275 | || $self->throw_error("Cannot add an augment method if a local method is already present"); |
3f9e4b0a |
276 | |
277 | $self->add_method($name => Moose::Meta::Method::Augmented->new( |
278 | method => $method, |
279 | class => $self, |
280 | name => $name, |
281 | )); |
78cd1d3b |
282 | } |
283 | |
1341f10c |
284 | ## Private Utility methods ... |
285 | |
05d9eaf6 |
286 | sub _find_next_method_by_name_which_is_not_overridden { |
287 | my ($self, $name) = @_; |
68efb014 |
288 | foreach my $method ($self->find_all_methods_by_name($name)) { |
ac2dc464 |
289 | return $method->{code} |
74862722 |
290 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overridden'); |
05d9eaf6 |
291 | } |
292 | return undef; |
293 | } |
294 | |
41419b9e |
295 | sub _fix_metaclass_incompatibility { |
1341f10c |
296 | my ($self, @superclasses) = @_; |
e606ae5f |
297 | |
1341f10c |
298 | foreach my $super (@superclasses) { |
349cda54 |
299 | my $meta = Class::MOP::Class->initialize($super); |
300 | |
301 | my @all_supers = $meta->linearized_isa; |
cb311121 |
302 | shift @all_supers; |
303 | |
304 | my @super_metas_to_fix = ($meta); |
305 | |
306 | # We need to check & fix the immediate superclass. If its @ISA |
307 | # contains a class without a metaclass instance, followed by a |
308 | # class _with_ a metaclass instance, init a metaclass instance |
309 | # for classes without one and fix compat up to and including |
310 | # the class which was already initialized. |
349cda54 |
311 | my $idx = first_index { Class::MOP::class_of($_) } @all_supers; |
cb311121 |
312 | |
313 | push @super_metas_to_fix, |
314 | map { Class::MOP::Class->initialize($_) } @all_supers[ 0 .. $idx ] |
315 | if $idx >= 0; |
349cda54 |
316 | |
317 | foreach my $super_meta (@super_metas_to_fix) { |
318 | $self->_fix_one_incompatible_metaclass($super_meta); |
1341f10c |
319 | } |
349cda54 |
320 | } |
321 | } |
322 | |
323 | sub _fix_one_incompatible_metaclass { |
324 | my ($self, $meta) = @_; |
e606ae5f |
325 | |
349cda54 |
326 | return if $self->_superclass_meta_is_compatible($meta); |
327 | |
328 | unless ( $self->is_pristine ) { |
329 | $self->throw_error( |
330 | "Cannot attempt to reinitialize metaclass for " |
331 | . $self->name |
332 | . ", it isn't pristine" ); |
f8b6827f |
333 | } |
cb311121 |
334 | |
349cda54 |
335 | $self->_reconcile_with_superclass_meta($meta); |
f8b6827f |
336 | } |
337 | |
338 | sub _superclass_meta_is_compatible { |
349cda54 |
339 | my ($self, $super_meta) = @_; |
f8b6827f |
340 | |
341 | next unless $super_meta->isa("Class::MOP::Class"); |
342 | |
343 | my $super_meta_name |
344 | = $super_meta->is_immutable |
345 | ? $super_meta->get_mutable_metaclass_name |
346 | : ref($super_meta); |
347 | |
348 | return 1 |
349 | if $self->isa($super_meta_name) |
350 | and |
351 | $self->instance_metaclass->isa( $super_meta->instance_metaclass ); |
352 | } |
353 | |
354 | # I don't want to have to type this >1 time |
355 | my @MetaClassTypes = |
3e334262 |
356 | qw( attribute_metaclass |
357 | method_metaclass |
358 | wrapped_method_metaclass |
359 | instance_metaclass |
360 | constructor_class |
361 | destructor_class |
362 | error_class ); |
f8b6827f |
363 | |
364 | sub _reconcile_with_superclass_meta { |
349cda54 |
365 | my ($self, $super_meta) = @_; |
f8b6827f |
366 | |
dd37a5be |
367 | my $super_meta_name |
f8b6827f |
368 | = $super_meta->is_immutable |
369 | ? $super_meta->get_mutable_metaclass_name |
370 | : ref($super_meta); |
e606ae5f |
371 | |
f8b6827f |
372 | my $self_metaclass = ref $self; |
373 | |
374 | # If neither of these is true we have a more serious |
375 | # incompatibility that we just cannot fix (yet?). |
dd37a5be |
376 | if ( $super_meta_name->isa( ref $self ) |
f8b6827f |
377 | && all { $super_meta->$_->isa( $self->$_ ) } @MetaClassTypes ) { |
0635500e |
378 | $self->_reinitialize_with($super_meta); |
f8b6827f |
379 | } |
380 | elsif ( $self->_all_metaclasses_differ_by_roles_only($super_meta) ) { |
0635500e |
381 | $self->_reconcile_role_differences($super_meta); |
1341f10c |
382 | } |
1341f10c |
383 | } |
384 | |
f8b6827f |
385 | sub _reinitialize_with { |
386 | my ( $self, $new_meta ) = @_; |
387 | |
0635500e |
388 | my $new_self = $new_meta->reinitialize( |
f8b6827f |
389 | $self->name, |
390 | attribute_metaclass => $new_meta->attribute_metaclass, |
391 | method_metaclass => $new_meta->method_metaclass, |
392 | instance_metaclass => $new_meta->instance_metaclass, |
393 | ); |
394 | |
8b1d510f |
395 | $new_self->$_( $new_meta->$_ ) |
396 | for qw( constructor_class destructor_class error_class ); |
f8b6827f |
397 | |
0635500e |
398 | %$self = %$new_self; |
399 | |
400 | bless $self, ref $new_self; |
401 | |
4c5fcc12 |
402 | # We need to replace the cached metaclass instance or else when it |
403 | # goes out of scope Class::MOP::Class destroy's the namespace for |
404 | # the metaclass's class, causing much havoc. |
0635500e |
405 | Class::MOP::store_metaclass_by_name( $self->name, $self ); |
4c5fcc12 |
406 | Class::MOP::weaken_metaclass( $self->name ) if $self->is_anon_class; |
f8b6827f |
407 | } |
408 | |
409 | # In the more complex case, we share a common ancestor with our |
410 | # superclass's metaclass, but each metaclass (ours and the parent's) |
411 | # has a different set of roles applied. We reconcile this by first |
412 | # reinitializing into the parent class, and _then_ applying our own |
413 | # roles. |
414 | sub _all_metaclasses_differ_by_roles_only { |
415 | my ($self, $super_meta) = @_; |
416 | |
417 | for my $pair ( |
418 | [ ref $self, ref $super_meta ], |
419 | map { [ $self->$_, $super_meta->$_ ] } @MetaClassTypes |
420 | ) { |
421 | |
422 | next if $pair->[0] eq $pair->[1]; |
423 | |
424 | my $self_meta_meta = Class::MOP::Class->initialize( $pair->[0] ); |
425 | my $super_meta_meta = Class::MOP::Class->initialize( $pair->[1] ); |
426 | |
427 | my $common_ancestor |
428 | = _find_common_ancestor( $self_meta_meta, $super_meta_meta ); |
429 | |
430 | return unless $common_ancestor; |
431 | |
432 | return |
433 | unless _is_role_only_subclass_of( |
434 | $self_meta_meta, |
435 | $common_ancestor, |
436 | ) |
437 | && _is_role_only_subclass_of( |
438 | $super_meta_meta, |
439 | $common_ancestor, |
440 | ); |
441 | } |
442 | |
443 | return 1; |
444 | } |
445 | |
446 | # This, and some other functions, could be called as methods, but |
447 | # they're not for two reasons. One, we just end up ignoring the first |
448 | # argument, because we can't call these directly on one of the real |
449 | # arguments, because one of them could be a Class::MOP::Class object |
450 | # and not a Moose::Meta::Class. Second, only a completely insane |
451 | # person would attempt to subclass this stuff! |
452 | sub _find_common_ancestor { |
453 | my ($meta1, $meta2) = @_; |
454 | |
455 | # FIXME? This doesn't account for multiple inheritance (not sure |
456 | # if it needs to though). For example, is somewhere in $meta1's |
db9fda52 |
457 | # history it inherits from both ClassA and ClassB, and $meta2 |
f8b6827f |
458 | # inherits from ClassB & ClassA, does it matter? And what crazy |
459 | # fool would do that anyway? |
460 | |
461 | my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa; |
462 | |
463 | return first { $meta1_parents{$_} } $meta2->linearized_isa; |
464 | } |
465 | |
466 | sub _is_role_only_subclass_of { |
467 | my ($meta, $ancestor) = @_; |
468 | |
469 | return 1 if $meta->name eq $ancestor; |
470 | |
471 | my @roles = _all_roles_until( $meta, $ancestor ); |
472 | |
473 | my %role_packages = map { $_->name => 1 } @roles; |
474 | |
475 | my $ancestor_meta = Class::MOP::Class->initialize($ancestor); |
476 | |
477 | my %shared_ancestors = map { $_ => 1 } $ancestor_meta->linearized_isa; |
478 | |
479 | for my $method ( $meta->get_all_methods() ) { |
480 | next if $method->name eq 'meta'; |
481 | next if $method->can('associated_attribute'); |
482 | |
483 | next |
484 | if $role_packages{ $method->original_package_name } |
485 | || $shared_ancestors{ $method->original_package_name }; |
486 | |
487 | return 0; |
488 | } |
489 | |
490 | # FIXME - this really isn't right. Just because an attribute is |
491 | # defined in a role doesn't mean it isn't _also_ defined in the |
492 | # subclass. |
493 | for my $attr ( $meta->get_all_attributes ) { |
494 | next if $shared_ancestors{ $attr->associated_class->name }; |
495 | |
496 | next if any { $_->has_attribute( $attr->name ) } @roles; |
497 | |
498 | return 0; |
499 | } |
500 | |
501 | return 1; |
502 | } |
503 | |
504 | sub _all_roles { |
505 | my $meta = shift; |
506 | |
507 | return _all_roles_until($meta); |
508 | } |
509 | |
510 | sub _all_roles_until { |
511 | my ($meta, $stop_at_class) = @_; |
512 | |
513 | return unless $meta->can('calculate_all_roles'); |
514 | |
515 | my @roles = $meta->calculate_all_roles; |
516 | |
517 | for my $class ( $meta->linearized_isa ) { |
518 | last if $stop_at_class && $stop_at_class eq $class; |
519 | |
520 | my $meta = Class::MOP::Class->initialize($class); |
521 | last unless $meta->can('calculate_all_roles'); |
522 | |
523 | push @roles, $meta->calculate_all_roles; |
524 | } |
525 | |
8b1d510f |
526 | return uniq @roles; |
f8b6827f |
527 | } |
528 | |
529 | sub _reconcile_role_differences { |
530 | my ($self, $super_meta) = @_; |
531 | |
3897e146 |
532 | my $self_meta = Class::MOP::class_of($self); |
f8b6827f |
533 | |
534 | my %roles; |
535 | |
536 | if ( my @roles = map { $_->name } _all_roles($self_meta) ) { |
537 | $roles{metaclass_roles} = \@roles; |
538 | } |
539 | |
540 | for my $thing (@MetaClassTypes) { |
541 | my $name = $self->$thing(); |
542 | |
543 | my $thing_meta = Class::MOP::Class->initialize($name); |
544 | |
545 | my @roles = map { $_->name } _all_roles($thing_meta) |
546 | or next; |
547 | |
548 | $roles{ $thing . '_roles' } = \@roles; |
549 | } |
550 | |
2b72f3b4 |
551 | $self->_reinitialize_with($super_meta); |
f8b6827f |
552 | |
553 | Moose::Util::MetaRole::apply_metaclass_roles( |
554 | for_class => $self->name, |
555 | %roles, |
556 | ); |
557 | |
558 | return $self; |
559 | } |
560 | |
1341f10c |
561 | sub _process_attribute { |
a3738e5b |
562 | my ( $self, $name, @args ) = @_; |
7e59b803 |
563 | |
564 | @args = %{$args[0]} if scalar @args == 1 && ref($args[0]) eq 'HASH'; |
d9bb6c63 |
565 | |
f9b5f5f8 |
566 | if (($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) |
329c5dd4 |
584 | || $self->throw_error("Could not find an attribute by the name of '$attr_name' to inherit from in ${\$self->name}", 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 | |
bf6fa6b3 |
597 | our $error_level; |
11c86f15 |
598 | |
599 | sub throw_error { |
600 | my ( $self, @args ) = @_; |
bf6fa6b3 |
601 | local $error_level = ($error_level || 0) + 1; |
11c86f15 |
602 | $self->raise_error($self->create_error(@args)); |
603 | } |
604 | |
605 | sub raise_error { |
606 | my ( $self, @args ) = @_; |
607 | die @args; |
608 | } |
609 | |
610 | sub create_error { |
611 | my ( $self, @args ) = @_; |
612 | |
d4b0f089 |
613 | require Moose::Error::Default; |
18748ad6 |
614 | require Carp::Heavy; |
615 | |
bf6fa6b3 |
616 | local $error_level = ($error_level || 0 ) + 1; |
18748ad6 |
617 | |
11c86f15 |
618 | if ( @args % 2 == 1 ) { |
619 | unshift @args, "message"; |
620 | } |
621 | |
fcab1742 |
622 | my %args = ( metaclass => $self, last_error => $@, @args ); |
11c86f15 |
623 | |
bf6fa6b3 |
624 | $args{depth} += $error_level; |
11c86f15 |
625 | |
bf6fa6b3 |
626 | my $class = ref $self ? $self->error_class : "Moose::Error::Default"; |
11c86f15 |
627 | |
a810a01f |
628 | Class::MOP::load_class($class); |
629 | |
11c86f15 |
630 | $class->new( |
bf6fa6b3 |
631 | Carp::caller_info($args{depth}), |
632 | %args |
11c86f15 |
633 | ); |
634 | } |
635 | |
c0e30cf5 |
636 | 1; |
637 | |
638 | __END__ |
639 | |
640 | =pod |
641 | |
642 | =head1 NAME |
643 | |
e522431d |
644 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
645 | |
c0e30cf5 |
646 | =head1 DESCRIPTION |
647 | |
70bb0f97 |
648 | This class is a subclass of L<Class::MOP::Class> that provides |
649 | additional Moose-specific functionality. |
e522431d |
650 | |
7854b409 |
651 | To really understand this class, you will need to start with the |
652 | L<Class::MOP::Class> documentation. This class can be understood as a |
653 | set of additional features on top of the basic feature provided by |
654 | that parent class. |
6ba6d68c |
655 | |
d4b1449e |
656 | =head1 INHERITANCE |
657 | |
658 | C<Moose::Meta::Class> is a subclass of L<Class::MOP::Class>. |
659 | |
c0e30cf5 |
660 | =head1 METHODS |
661 | |
662 | =over 4 |
663 | |
70bb0f97 |
664 | =item B<< Moose::Meta::Class->initialize($package_name, %options) >> |
590868a3 |
665 | |
70bb0f97 |
666 | This overrides the parent's method in order to provide its own |
667 | defaults for the C<attribute_metaclass>, C<instance_metaclass>, and |
668 | C<method_metaclass> options. |
61bdd94f |
669 | |
70bb0f97 |
670 | These all default to the appropriate Moose class. |
61bdd94f |
671 | |
70bb0f97 |
672 | =item B<< Moose::Meta::Class->create($package_name, %options) >> |
17594769 |
673 | |
70bb0f97 |
674 | This overrides the parent's method in order to accept a C<roles> |
675 | option. This should be an array reference containing one more roles |
676 | that the class does. |
17594769 |
677 | |
70bb0f97 |
678 | my $metaclass = Moose::Meta::Class->create( 'New::Class', roles => [...] ); |
17594769 |
679 | |
70bb0f97 |
680 | =item B<< Moose::Meta::Class->create_anon_class >> |
17594769 |
681 | |
70bb0f97 |
682 | This overrides the parent's method to accept a C<roles> option, just |
683 | as C<create> does. |
5cf3dbcf |
684 | |
70bb0f97 |
685 | It also accepts a C<cache> option. If this is true, then the anonymous |
686 | class will be cached based on its superclasses and roles. If an |
687 | existing anonymous class in the cache has the same superclasses and |
688 | roles, it will be reused. |
ac2dc464 |
689 | |
70bb0f97 |
690 | my $metaclass = Moose::Meta::Class->create_anon_class( |
691 | superclasses => ['Foo'], |
692 | roles => [qw/Some Roles Go Here/], |
693 | cache => 1, |
694 | ); |
ac2dc464 |
695 | |
70bb0f97 |
696 | =item B<< $metaclass->make_immutable(%options) >> |
ac2dc464 |
697 | |
70bb0f97 |
698 | This overrides the parent's method to add a few options. Specifically, |
699 | it uses the Moose-specific constructor and destructor classes, and |
700 | enables inlining the destructor. |
8c9d74e7 |
701 | |
70bb0f97 |
702 | Also, since Moose always inlines attributes, it sets the |
703 | C<inline_accessors> option to false. |
02a0fb52 |
704 | |
70bb0f97 |
705 | =item B<< $metaclass->new_object(%params) >> |
a15dff8d |
706 | |
70bb0f97 |
707 | This overrides the parent's method in order to add support for |
708 | attribute triggers. |
6ba6d68c |
709 | |
70bb0f97 |
710 | =item B<< $metaclass->add_override_method_modifier($name, $sub) >> |
ef1d5f4b |
711 | |
70bb0f97 |
712 | This adds an C<override> method modifier to the package. |
e9ec68d6 |
713 | |
70bb0f97 |
714 | =item B<< $metaclass->add_augment_method_modifier($name, $sub) >> |
e9ec68d6 |
715 | |
70bb0f97 |
716 | This adds an C<augment> method modifier to the package. |
78cd1d3b |
717 | |
70bb0f97 |
718 | =item B<< $metaclass->calculate_all_roles >> |
02a0fb52 |
719 | |
70bb0f97 |
720 | This will return a unique array of C<Moose::Meta::Role> instances |
721 | which are attached to this class. |
78cd1d3b |
722 | |
70bb0f97 |
723 | =item B<< $metaclass->add_role($role) >> |
02a0fb52 |
724 | |
70bb0f97 |
725 | This takes a L<Moose::Meta::Role> object, and adds it to the class's |
726 | list of roles. This I<does not> actually apply the role to the class. |
2b14ac61 |
727 | |
b90dd4ef |
728 | =item B<< $metaclass->role_applications >> |
729 | |
639f9a1a |
730 | Returns a list of L<Moose::Meta::Role::Application::ToClass> |
b90dd4ef |
731 | objects, which contain the arguments to role application. |
732 | |
733 | =item B<< $metaclass->add_role_application($application) >> |
734 | |
735 | This takes a L<Moose::Meta::Role::Application::ToClass> object, and |
736 | adds it to the class's list of role applications. This I<does not> |
737 | actually apply any role to the class; it is only for tracking role |
738 | applications. |
739 | |
70bb0f97 |
740 | =item B<< $metaclass->does_role($role_name) >> |
ef333f17 |
741 | |
70bb0f97 |
742 | This returns a boolean indicating whether or not the class does the |
743 | specified role. This tests both the class and its parents. |
02a0fb52 |
744 | |
70bb0f97 |
745 | =item B<< $metaclass->excludes_role($role_name) >> |
ef333f17 |
746 | |
70bb0f97 |
747 | A class excludes a role if it has already composed a role which |
748 | excludes the named role. This tests both the class and its parents. |
02a0fb52 |
749 | |
70bb0f97 |
750 | =item B<< $metaclass->add_attribute($attr_name, %params|$params) >> |
ef333f17 |
751 | |
70bb0f97 |
752 | This overrides the parent's method in order to allow the parameters to |
753 | be provided as a hash reference. |
02a0fb52 |
754 | |
70bb0f97 |
755 | =item B<< $metaclass->constructor_class ($class_name) >> |
d79e62fd |
756 | |
70bb0f97 |
757 | =item B<< $metaclass->destructor_class ($class_name) >> |
e606ae5f |
758 | |
759 | These are the names of classes used when making a class |
760 | immutable. These default to L<Moose::Meta::Method::Constructor> and |
761 | L<Moose::Meta::Method::Destructor> respectively. These accessors are |
762 | read-write, so you can use them to change the class name. |
763 | |
70bb0f97 |
764 | =item B<< $metaclass->error_class($class_name) >> |
8b1d510f |
765 | |
70bb0f97 |
766 | The name of the class used to throw errors. This defaults to |
8b1d510f |
767 | L<Moose::Error::Default>, which generates an error with a stacktrace |
768 | just like C<Carp::confess>. |
769 | |
70bb0f97 |
770 | =item B<< $metaclass->throw_error($message, %extra) >> |
11c86f15 |
771 | |
772 | Throws the error created by C<create_error> using C<raise_error> |
773 | |
c0e30cf5 |
774 | =back |
775 | |
776 | =head1 BUGS |
777 | |
ac2dc464 |
778 | All complex software has bugs lurking in it, and this module is no |
c0e30cf5 |
779 | exception. If you find a bug please either email me, or add the bug |
780 | to cpan-RT. |
781 | |
c0e30cf5 |
782 | =head1 AUTHOR |
783 | |
784 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
785 | |
786 | =head1 COPYRIGHT AND LICENSE |
787 | |
2840a3b2 |
788 | Copyright 2006-2009 by Infinity Interactive, Inc. |
c0e30cf5 |
789 | |
790 | L<http://www.iinteractive.com> |
791 | |
792 | This library is free software; you can redistribute it and/or modify |
ac2dc464 |
793 | it under the same terms as Perl itself. |
c0e30cf5 |
794 | |
8a7a9c53 |
795 | =cut |
1a563243 |
796 | |