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 ); |
8b1d510f |
11 | use List::MoreUtils qw( any all uniq ); |
21f1e231 |
12 | use Scalar::Util 'weaken', 'blessed'; |
a15dff8d |
13 | |
f5bc97e5 |
14 | our $VERSION = '0.60'; |
e606ae5f |
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}; |
310ba883 |
63 | my $roles = delete $options{roles}; |
dd37a5be |
64 | |
61bdd94f |
65 | my $class = $self->SUPER::create($package_name, %options); |
dd37a5be |
66 | |
310ba883 |
67 | if ($roles) { |
68 | Moose::Util::apply_all_roles( $class, @$roles ); |
61bdd94f |
69 | } |
70 | |
71 | return $class; |
72 | } |
73 | |
2b72f3b4 |
74 | sub check_metaclass_compatibility { |
75 | my $self = shift; |
76 | |
77 | if ( my @supers = $self->superclasses ) { |
78 | $self->_fix_metaclass_incompatibility(@supers); |
79 | } |
80 | |
81 | $self->SUPER::check_metaclass_compatibility(@_); |
82 | } |
83 | |
17594769 |
84 | my %ANON_CLASSES; |
85 | |
86 | sub create_anon_class { |
87 | my ($self, %options) = @_; |
88 | |
89 | my $cache_ok = delete $options{cache}; |
17594769 |
90 | |
91 | # something like Super::Class|Super::Class::2=Role|Role::1 |
92 | my $cache_key = join '=' => ( |
6d5cbd2b |
93 | join('|', sort @{$options{superclasses} || []}), |
94 | join('|', sort @{$options{roles} || []}), |
17594769 |
95 | ); |
96 | |
6d5cbd2b |
97 | if ($cache_ok && defined $ANON_CLASSES{$cache_key}) { |
17594769 |
98 | return $ANON_CLASSES{$cache_key}; |
99 | } |
100 | |
101 | my $new_class = $self->SUPER::create_anon_class(%options); |
102 | |
6d5cbd2b |
103 | $ANON_CLASSES{$cache_key} = $new_class |
104 | if $cache_ok; |
17594769 |
105 | |
106 | return $new_class; |
107 | } |
108 | |
ef333f17 |
109 | sub add_role { |
110 | my ($self, $role) = @_; |
111 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
11c86f15 |
112 | || $self->throw_error("Roles must be instances of Moose::Meta::Role", data => $role); |
ef333f17 |
113 | push @{$self->roles} => $role; |
114 | } |
115 | |
b8aeb4dc |
116 | sub calculate_all_roles { |
117 | my $self = shift; |
118 | my %seen; |
119 | grep { !$seen{$_->name}++ } map { $_->calculate_all_roles } @{ $self->roles }; |
120 | } |
121 | |
ef333f17 |
122 | sub does_role { |
123 | my ($self, $role_name) = @_; |
124 | (defined $role_name) |
11c86f15 |
125 | || $self->throw_error("You must supply a role name to look for"); |
9c429218 |
126 | foreach my $class ($self->class_precedence_list) { |
81c3738f |
127 | next unless $class->can('meta') && $class->meta->can('roles'); |
9c429218 |
128 | foreach my $role (@{$class->meta->roles}) { |
129 | return 1 if $role->does_role($role_name); |
130 | } |
ef333f17 |
131 | } |
132 | return 0; |
133 | } |
134 | |
d79e62fd |
135 | sub excludes_role { |
136 | my ($self, $role_name) = @_; |
137 | (defined $role_name) |
11c86f15 |
138 | || $self->throw_error("You must supply a role name to look for"); |
ac2dc464 |
139 | foreach my $class ($self->class_precedence_list) { |
140 | next unless $class->can('meta'); |
5cb193ed |
141 | # NOTE: |
142 | # in the pretty rare instance when a Moose metaclass |
ac2dc464 |
143 | # is itself extended with a role, this check needs to |
5cb193ed |
144 | # be done since some items in the class_precedence_list |
ac2dc464 |
145 | # might in fact be Class::MOP based still. |
146 | next unless $class->meta->can('roles'); |
9c429218 |
147 | foreach my $role (@{$class->meta->roles}) { |
148 | return 1 if $role->excludes_role($role_name); |
149 | } |
d79e62fd |
150 | } |
151 | return 0; |
152 | } |
153 | |
8c9d74e7 |
154 | sub new_object { |
1308deb4 |
155 | my $class = shift; |
e606ae5f |
156 | my $params = @_ == 1 ? $_[0] : {@_}; |
1308deb4 |
157 | my $self = $class->SUPER::new_object($params); |
158 | |
159 | foreach my $attr ( $class->compute_all_applicable_attributes() ) { |
160 | |
161 | next unless $attr->can('has_trigger') && $attr->has_trigger; |
162 | |
163 | my $init_arg = $attr->init_arg; |
164 | |
165 | next unless defined $init_arg; |
166 | |
167 | next unless exists $params->{$init_arg}; |
168 | |
169 | $attr->trigger->( |
170 | $self, |
171 | ( |
172 | $attr->should_coerce |
173 | ? $attr->get_read_method_ref->($self) |
174 | : $params->{$init_arg} |
175 | ), |
176 | $attr |
177 | ); |
8c9d74e7 |
178 | } |
1308deb4 |
179 | |
ac2dc464 |
180 | return $self; |
8c9d74e7 |
181 | } |
182 | |
a15dff8d |
183 | sub construct_instance { |
e606ae5f |
184 | my $class = shift; |
185 | my $params = @_ == 1 ? $_[0] : {@_}; |
ddd0ec20 |
186 | my $meta_instance = $class->get_meta_instance; |
575db57d |
187 | # FIXME: |
188 | # the code below is almost certainly incorrect |
189 | # but this is foreign inheritence, so we might |
ac2dc464 |
190 | # have to kludge it in the end. |
e606ae5f |
191 | my $instance = $params->{'__INSTANCE__'} || $meta_instance->create_instance(); |
ac2dc464 |
192 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
e606ae5f |
193 | $attr->initialize_instance_slot($meta_instance, $instance, $params); |
a15dff8d |
194 | } |
195 | return $instance; |
196 | } |
197 | |
093b12c2 |
198 | # FIXME: |
199 | # This is ugly |
ac2dc464 |
200 | sub get_method_map { |
093b12c2 |
201 | my $self = shift; |
53dd42d8 |
202 | |
e606ae5f |
203 | my $current = Class::MOP::check_package_cache_flag($self->name); |
204 | |
205 | if (defined $self->{'_package_cache_flag'} && $self->{'_package_cache_flag'} == $current) { |
206 | return $self->{'methods'}; |
53dd42d8 |
207 | } |
208 | |
e606ae5f |
209 | $self->{_package_cache_flag} = $current; |
210 | |
211 | my $map = $self->{'methods'}; |
ac2dc464 |
212 | |
093b12c2 |
213 | my $class_name = $self->name; |
214 | my $method_metaclass = $self->method_metaclass; |
ac2dc464 |
215 | |
0addec44 |
216 | my %all_code = $self->get_all_package_symbols('CODE'); |
ac2dc464 |
217 | |
0addec44 |
218 | foreach my $symbol (keys %all_code) { |
219 | my $code = $all_code{$symbol}; |
ac2dc464 |
220 | |
221 | next if exists $map->{$symbol} && |
222 | defined $map->{$symbol} && |
223 | $map->{$symbol}->body == $code; |
224 | |
53dd42d8 |
225 | my ($pkg, $name) = Class::MOP::get_code_info($code); |
ac2dc464 |
226 | |
53dd42d8 |
227 | if ($pkg->can('meta') |
4f8f3aab |
228 | # NOTE: |
229 | # we don't know what ->meta we are calling |
53dd42d8 |
230 | # here, so we need to be careful cause it |
231 | # just might blow up at us, or just complain |
232 | # loudly (in the case of Curses.pm) so we |
4f8f3aab |
233 | # just be a little overly cautious here. |
234 | # - SL |
235 | && eval { no warnings; blessed($pkg->meta) } |
236 | && $pkg->meta->isa('Moose::Meta::Role')) { |
093b12c2 |
237 | #my $role = $pkg->meta->name; |
238 | #next unless $self->does_role($role); |
239 | } |
240 | else { |
2887c827 |
241 | |
242 | # NOTE: |
243 | # in 5.10 constant.pm the constants show up |
244 | # as being in the right package, but in pre-5.10 |
245 | # they show up as constant::__ANON__ so we |
246 | # make an exception here to be sure that things |
247 | # work as expected in both. |
248 | # - SL |
249 | unless ($pkg eq 'constant' && $name eq '__ANON__') { |
250 | next if ($pkg || '') ne $class_name || |
251 | (($name || '') ne '__ANON__' && ($pkg || '') ne $class_name); |
252 | } |
53dd42d8 |
253 | |
093b12c2 |
254 | } |
ac2dc464 |
255 | |
1b2aea39 |
256 | $map->{$symbol} = $method_metaclass->wrap( |
257 | $code, |
258 | package_name => $class_name, |
259 | name => $symbol |
260 | ); |
093b12c2 |
261 | } |
ac2dc464 |
262 | |
093b12c2 |
263 | return $map; |
a7d0cd00 |
264 | } |
265 | |
093b12c2 |
266 | ### --------------------------------------------- |
267 | |
a2eec5e7 |
268 | sub add_attribute { |
269 | my $self = shift; |
e472c9a5 |
270 | $self->SUPER::add_attribute( |
271 | (blessed $_[0] && $_[0]->isa('Class::MOP::Attribute') |
272 | ? $_[0] |
273 | : $self->_process_attribute(@_)) |
274 | ); |
a2eec5e7 |
275 | } |
276 | |
78cd1d3b |
277 | sub add_override_method_modifier { |
278 | my ($self, $name, $method, $_super_package) = @_; |
18c2ec0e |
279 | |
d05cd563 |
280 | (!$self->has_method($name)) |
11c86f15 |
281 | || $self->throw_error("Cannot add an override method if a local method is already present"); |
18c2ec0e |
282 | |
283 | $self->add_method($name => Moose::Meta::Method::Overriden->new( |
3f9e4b0a |
284 | method => $method, |
285 | class => $self, |
286 | package => $_super_package, # need this for roles |
287 | name => $name, |
18c2ec0e |
288 | )); |
78cd1d3b |
289 | } |
290 | |
291 | sub add_augment_method_modifier { |
ac2dc464 |
292 | my ($self, $name, $method) = @_; |
d05cd563 |
293 | (!$self->has_method($name)) |
11c86f15 |
294 | || $self->throw_error("Cannot add an augment method if a local method is already present"); |
3f9e4b0a |
295 | |
296 | $self->add_method($name => Moose::Meta::Method::Augmented->new( |
297 | method => $method, |
298 | class => $self, |
299 | name => $name, |
300 | )); |
78cd1d3b |
301 | } |
302 | |
1341f10c |
303 | ## Private Utility methods ... |
304 | |
05d9eaf6 |
305 | sub _find_next_method_by_name_which_is_not_overridden { |
306 | my ($self, $name) = @_; |
68efb014 |
307 | foreach my $method ($self->find_all_methods_by_name($name)) { |
ac2dc464 |
308 | return $method->{code} |
05d9eaf6 |
309 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overriden'); |
310 | } |
311 | return undef; |
312 | } |
313 | |
41419b9e |
314 | sub _fix_metaclass_incompatibility { |
1341f10c |
315 | my ($self, @superclasses) = @_; |
e606ae5f |
316 | |
1341f10c |
317 | foreach my $super (@superclasses) { |
f8b6827f |
318 | next if $self->_superclass_meta_is_compatible($super); |
e606ae5f |
319 | |
320 | unless ( $self->is_pristine ) { |
f8b6827f |
321 | $self->throw_error( |
322 | "Cannot attempt to reinitialize metaclass for " |
323 | . $self->name |
324 | . ", it isn't pristine" ); |
1341f10c |
325 | } |
e606ae5f |
326 | |
0635500e |
327 | $self->_reconcile_with_superclass_meta($super); |
f8b6827f |
328 | } |
f8b6827f |
329 | } |
330 | |
331 | sub _superclass_meta_is_compatible { |
332 | my ($self, $super) = @_; |
333 | |
334 | my $super_meta = Class::MOP::Class->initialize($super) |
335 | or return 1; |
336 | |
337 | next unless $super_meta->isa("Class::MOP::Class"); |
338 | |
339 | my $super_meta_name |
340 | = $super_meta->is_immutable |
341 | ? $super_meta->get_mutable_metaclass_name |
342 | : ref($super_meta); |
343 | |
344 | return 1 |
345 | if $self->isa($super_meta_name) |
346 | and |
347 | $self->instance_metaclass->isa( $super_meta->instance_metaclass ); |
348 | } |
349 | |
350 | # I don't want to have to type this >1 time |
351 | my @MetaClassTypes = |
8b1d510f |
352 | qw( attribute_metaclass method_metaclass instance_metaclass |
353 | constructor_class destructor_class error_class ); |
f8b6827f |
354 | |
355 | sub _reconcile_with_superclass_meta { |
356 | my ($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 | |
8b1d510f |
388 | $new_self->$_( $new_meta->$_ ) |
389 | for qw( constructor_class destructor_class error_class ); |
f8b6827f |
390 | |
0635500e |
391 | %$self = %$new_self; |
392 | |
393 | bless $self, ref $new_self; |
394 | |
4c5fcc12 |
395 | # We need to replace the cached metaclass instance or else when it |
396 | # goes out of scope Class::MOP::Class destroy's the namespace for |
397 | # the metaclass's class, causing much havoc. |
0635500e |
398 | Class::MOP::store_metaclass_by_name( $self->name, $self ); |
4c5fcc12 |
399 | Class::MOP::weaken_metaclass( $self->name ) if $self->is_anon_class; |
f8b6827f |
400 | } |
401 | |
402 | # In the more complex case, we share a common ancestor with our |
403 | # superclass's metaclass, but each metaclass (ours and the parent's) |
404 | # has a different set of roles applied. We reconcile this by first |
405 | # reinitializing into the parent class, and _then_ applying our own |
406 | # roles. |
407 | sub _all_metaclasses_differ_by_roles_only { |
408 | my ($self, $super_meta) = @_; |
409 | |
410 | for my $pair ( |
411 | [ ref $self, ref $super_meta ], |
412 | map { [ $self->$_, $super_meta->$_ ] } @MetaClassTypes |
413 | ) { |
414 | |
415 | next if $pair->[0] eq $pair->[1]; |
416 | |
417 | my $self_meta_meta = Class::MOP::Class->initialize( $pair->[0] ); |
418 | my $super_meta_meta = Class::MOP::Class->initialize( $pair->[1] ); |
419 | |
420 | my $common_ancestor |
421 | = _find_common_ancestor( $self_meta_meta, $super_meta_meta ); |
422 | |
423 | return unless $common_ancestor; |
424 | |
425 | return |
426 | unless _is_role_only_subclass_of( |
427 | $self_meta_meta, |
428 | $common_ancestor, |
429 | ) |
430 | && _is_role_only_subclass_of( |
431 | $super_meta_meta, |
432 | $common_ancestor, |
433 | ); |
434 | } |
435 | |
436 | return 1; |
437 | } |
438 | |
439 | # This, and some other functions, could be called as methods, but |
440 | # they're not for two reasons. One, we just end up ignoring the first |
441 | # argument, because we can't call these directly on one of the real |
442 | # arguments, because one of them could be a Class::MOP::Class object |
443 | # and not a Moose::Meta::Class. Second, only a completely insane |
444 | # person would attempt to subclass this stuff! |
445 | sub _find_common_ancestor { |
446 | my ($meta1, $meta2) = @_; |
447 | |
448 | # FIXME? This doesn't account for multiple inheritance (not sure |
449 | # if it needs to though). For example, is somewhere in $meta1's |
450 | # history it inherits from both ClassA and ClassB, and $meta |
451 | # inherits from ClassB & ClassA, does it matter? And what crazy |
452 | # fool would do that anyway? |
453 | |
454 | my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa; |
455 | |
456 | return first { $meta1_parents{$_} } $meta2->linearized_isa; |
457 | } |
458 | |
459 | sub _is_role_only_subclass_of { |
460 | my ($meta, $ancestor) = @_; |
461 | |
462 | return 1 if $meta->name eq $ancestor; |
463 | |
464 | my @roles = _all_roles_until( $meta, $ancestor ); |
465 | |
466 | my %role_packages = map { $_->name => 1 } @roles; |
467 | |
468 | my $ancestor_meta = Class::MOP::Class->initialize($ancestor); |
469 | |
470 | my %shared_ancestors = map { $_ => 1 } $ancestor_meta->linearized_isa; |
471 | |
472 | for my $method ( $meta->get_all_methods() ) { |
473 | next if $method->name eq 'meta'; |
474 | next if $method->can('associated_attribute'); |
475 | |
476 | next |
477 | if $role_packages{ $method->original_package_name } |
478 | || $shared_ancestors{ $method->original_package_name }; |
479 | |
480 | return 0; |
481 | } |
482 | |
483 | # FIXME - this really isn't right. Just because an attribute is |
484 | # defined in a role doesn't mean it isn't _also_ defined in the |
485 | # subclass. |
486 | for my $attr ( $meta->get_all_attributes ) { |
487 | next if $shared_ancestors{ $attr->associated_class->name }; |
488 | |
489 | next if any { $_->has_attribute( $attr->name ) } @roles; |
490 | |
491 | return 0; |
492 | } |
493 | |
494 | return 1; |
495 | } |
496 | |
497 | sub _all_roles { |
498 | my $meta = shift; |
499 | |
500 | return _all_roles_until($meta); |
501 | } |
502 | |
503 | sub _all_roles_until { |
504 | my ($meta, $stop_at_class) = @_; |
505 | |
506 | return unless $meta->can('calculate_all_roles'); |
507 | |
508 | my @roles = $meta->calculate_all_roles; |
509 | |
510 | for my $class ( $meta->linearized_isa ) { |
511 | last if $stop_at_class && $stop_at_class eq $class; |
512 | |
513 | my $meta = Class::MOP::Class->initialize($class); |
514 | last unless $meta->can('calculate_all_roles'); |
515 | |
516 | push @roles, $meta->calculate_all_roles; |
517 | } |
518 | |
8b1d510f |
519 | return uniq @roles; |
f8b6827f |
520 | } |
521 | |
522 | sub _reconcile_role_differences { |
523 | my ($self, $super_meta) = @_; |
524 | |
525 | my $self_meta = $self->meta; |
526 | |
527 | my %roles; |
528 | |
529 | if ( my @roles = map { $_->name } _all_roles($self_meta) ) { |
530 | $roles{metaclass_roles} = \@roles; |
531 | } |
532 | |
533 | for my $thing (@MetaClassTypes) { |
534 | my $name = $self->$thing(); |
535 | |
536 | my $thing_meta = Class::MOP::Class->initialize($name); |
537 | |
538 | my @roles = map { $_->name } _all_roles($thing_meta) |
539 | or next; |
540 | |
541 | $roles{ $thing . '_roles' } = \@roles; |
542 | } |
543 | |
2b72f3b4 |
544 | $self->_reinitialize_with($super_meta); |
f8b6827f |
545 | |
546 | Moose::Util::MetaRole::apply_metaclass_roles( |
547 | for_class => $self->name, |
548 | %roles, |
549 | ); |
550 | |
551 | return $self; |
552 | } |
553 | |
d7d8a8c7 |
554 | # NOTE: |
d9bb6c63 |
555 | # this was crap anyway, see |
556 | # Moose::Util::apply_all_roles |
d7d8a8c7 |
557 | # instead |
4498537c |
558 | sub _apply_all_roles { |
547dda77 |
559 | Carp::croak 'DEPRECATED: use Moose::Util::apply_all_roles($meta, @roles) instead' |
4498537c |
560 | } |
1341f10c |
561 | |
562 | sub _process_attribute { |
a3738e5b |
563 | my ( $self, $name, @args ) = @_; |
7e59b803 |
564 | |
565 | @args = %{$args[0]} if scalar @args == 1 && ref($args[0]) eq 'HASH'; |
d9bb6c63 |
566 | |
f9b5f5f8 |
567 | if (($name || '') =~ /^\+(.*)/) { |
7e59b803 |
568 | return $self->_process_inherited_attribute($1, @args); |
1341f10c |
569 | } |
570 | else { |
7e59b803 |
571 | return $self->_process_new_attribute($name, @args); |
572 | } |
573 | } |
574 | |
575 | sub _process_new_attribute { |
576 | my ( $self, $name, @args ) = @_; |
7e59b803 |
577 | |
d5c30e52 |
578 | $self->attribute_metaclass->interpolate_class_and_new($name, @args); |
1341f10c |
579 | } |
580 | |
581 | sub _process_inherited_attribute { |
582 | my ($self, $attr_name, %options) = @_; |
583 | my $inherited_attr = $self->find_attribute_by_name($attr_name); |
584 | (defined $inherited_attr) |
11c86f15 |
585 | || $self->throw_error("Could not find an attribute by the name of '$attr_name' to inherit from", data => $attr_name); |
1341f10c |
586 | if ($inherited_attr->isa('Moose::Meta::Attribute')) { |
d7d8a8c7 |
587 | return $inherited_attr->clone_and_inherit_options(%options); |
1341f10c |
588 | } |
589 | else { |
590 | # NOTE: |
591 | # kind of a kludge to handle Class::MOP::Attributes |
d7d8a8c7 |
592 | return $inherited_attr->Moose::Meta::Attribute::clone_and_inherit_options(%options); |
ac2dc464 |
593 | } |
1341f10c |
594 | } |
595 | |
5cf3dbcf |
596 | ## ------------------------------------------------- |
597 | |
598 | use Moose::Meta::Method::Constructor; |
1f779926 |
599 | use Moose::Meta::Method::Destructor; |
5cf3dbcf |
600 | |
ac2dc464 |
601 | # This could be done by using SUPER and altering ->options |
602 | # I am keeping it this way to make it more explicit. |
603 | sub create_immutable_transformer { |
604 | my $self = shift; |
605 | my $class = Class::MOP::Immutable->new($self, { |
e606ae5f |
606 | read_only => [qw/superclasses/], |
607 | cannot_call => [qw/ |
608 | add_method |
609 | alias_method |
610 | remove_method |
611 | add_attribute |
612 | remove_attribute |
613 | remove_package_symbol |
614 | add_role |
615 | /], |
616 | memoize => { |
617 | class_precedence_list => 'ARRAY', |
618 | linearized_isa => 'ARRAY', # FIXME perl 5.10 memoizes this on its own, no need? |
619 | get_all_methods => 'ARRAY', |
620 | #get_all_attributes => 'ARRAY', # it's an alias, no need, but maybe in the future |
621 | compute_all_applicable_attributes => 'ARRAY', |
622 | get_meta_instance => 'SCALAR', |
623 | get_method_map => 'SCALAR', |
624 | calculate_all_roles => 'ARRAY', |
625 | }, |
626 | # NOTE: |
627 | # this is ugly, but so are typeglobs, |
628 | # so whattayahgonnadoboutit |
629 | # - SL |
630 | wrapped => { |
631 | add_package_symbol => sub { |
632 | my $original = shift; |
633 | $self->throw_error("Cannot add package symbols to an immutable metaclass") |
634 | unless (caller(2))[3] eq 'Class::MOP::Package::get_package_symbol'; |
635 | goto $original->body; |
636 | }, |
637 | }, |
ac2dc464 |
638 | }); |
639 | return $class; |
640 | } |
641 | |
642 | sub make_immutable { |
643 | my $self = shift; |
644 | $self->SUPER::make_immutable |
645 | ( |
e606ae5f |
646 | constructor_class => $self->constructor_class, |
647 | destructor_class => $self->destructor_class, |
ac2dc464 |
648 | inline_destructor => 1, |
649 | # NOTE: |
650 | # no need to do this, |
651 | # Moose always does it |
652 | inline_accessors => 0, |
653 | @_, |
654 | ); |
5cf3dbcf |
655 | } |
656 | |
bf6fa6b3 |
657 | our $error_level; |
11c86f15 |
658 | |
659 | sub throw_error { |
660 | my ( $self, @args ) = @_; |
bf6fa6b3 |
661 | local $error_level = ($error_level || 0) + 1; |
11c86f15 |
662 | $self->raise_error($self->create_error(@args)); |
663 | } |
664 | |
665 | sub raise_error { |
666 | my ( $self, @args ) = @_; |
667 | die @args; |
668 | } |
669 | |
670 | sub create_error { |
671 | my ( $self, @args ) = @_; |
672 | |
18748ad6 |
673 | require Carp::Heavy; |
674 | |
bf6fa6b3 |
675 | local $error_level = ($error_level || 0 ) + 1; |
18748ad6 |
676 | |
11c86f15 |
677 | if ( @args % 2 == 1 ) { |
678 | unshift @args, "message"; |
679 | } |
680 | |
fcab1742 |
681 | my %args = ( metaclass => $self, last_error => $@, @args ); |
11c86f15 |
682 | |
bf6fa6b3 |
683 | $args{depth} += $error_level; |
11c86f15 |
684 | |
bf6fa6b3 |
685 | my $class = ref $self ? $self->error_class : "Moose::Error::Default"; |
11c86f15 |
686 | |
a810a01f |
687 | Class::MOP::load_class($class); |
688 | |
11c86f15 |
689 | $class->new( |
bf6fa6b3 |
690 | Carp::caller_info($args{depth}), |
691 | %args |
11c86f15 |
692 | ); |
693 | } |
694 | |
c0e30cf5 |
695 | 1; |
696 | |
697 | __END__ |
698 | |
699 | =pod |
700 | |
701 | =head1 NAME |
702 | |
e522431d |
703 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
704 | |
c0e30cf5 |
705 | =head1 DESCRIPTION |
706 | |
ac2dc464 |
707 | This is a subclass of L<Class::MOP::Class> with Moose specific |
e522431d |
708 | extensions. |
709 | |
ac2dc464 |
710 | For the most part, the only time you will ever encounter an |
711 | instance of this class is if you are doing some serious deep |
712 | introspection. To really understand this class, you need to refer |
6ba6d68c |
713 | to the L<Class::MOP::Class> documentation. |
714 | |
c0e30cf5 |
715 | =head1 METHODS |
716 | |
717 | =over 4 |
718 | |
590868a3 |
719 | =item B<initialize> |
720 | |
61bdd94f |
721 | =item B<create> |
722 | |
17594769 |
723 | Overrides original to accept a list of roles to apply to |
61bdd94f |
724 | the created class. |
725 | |
17594769 |
726 | my $metaclass = Moose::Meta::Class->create( 'New::Class', roles => [...] ); |
727 | |
728 | =item B<create_anon_class> |
729 | |
730 | Overrides original to support roles and caching. |
731 | |
732 | my $metaclass = Moose::Meta::Class->create_anon_class( |
733 | superclasses => ['Foo'], |
734 | roles => [qw/Some Roles Go Here/], |
735 | cache => 1, |
736 | ); |
737 | |
5cf3dbcf |
738 | =item B<make_immutable> |
739 | |
ac2dc464 |
740 | Override original to add default options for inlining destructor |
741 | and altering the Constructor metaclass. |
742 | |
743 | =item B<create_immutable_transformer> |
744 | |
745 | Override original to lock C<add_role> and memoize C<calculate_all_roles> |
746 | |
8c9d74e7 |
747 | =item B<new_object> |
748 | |
02a0fb52 |
749 | We override this method to support the C<trigger> attribute option. |
750 | |
a15dff8d |
751 | =item B<construct_instance> |
752 | |
ac2dc464 |
753 | This provides some Moose specific extensions to this method, you |
754 | almost never call this method directly unless you really know what |
755 | you are doing. |
6ba6d68c |
756 | |
757 | This method makes sure to handle the moose weak-ref, type-constraint |
ac2dc464 |
758 | and type coercion features. |
ef1d5f4b |
759 | |
093b12c2 |
760 | =item B<get_method_map> |
e9ec68d6 |
761 | |
ac2dc464 |
762 | This accommodates Moose::Meta::Role::Method instances, which are |
763 | aliased, instead of added, but still need to be counted as valid |
e9ec68d6 |
764 | methods. |
765 | |
78cd1d3b |
766 | =item B<add_override_method_modifier ($name, $method)> |
767 | |
ac2dc464 |
768 | This will create an C<override> method modifier for you, and install |
02a0fb52 |
769 | it in the package. |
770 | |
78cd1d3b |
771 | =item B<add_augment_method_modifier ($name, $method)> |
772 | |
ac2dc464 |
773 | This will create an C<augment> method modifier for you, and install |
02a0fb52 |
774 | it in the package. |
775 | |
2b14ac61 |
776 | =item B<calculate_all_roles> |
777 | |
ef333f17 |
778 | =item B<roles> |
779 | |
ac2dc464 |
780 | This will return an array of C<Moose::Meta::Role> instances which are |
02a0fb52 |
781 | attached to this class. |
782 | |
ef333f17 |
783 | =item B<add_role ($role)> |
784 | |
ac2dc464 |
785 | This takes an instance of C<Moose::Meta::Role> in C<$role>, and adds it |
02a0fb52 |
786 | to the list of associated roles. |
787 | |
ef333f17 |
788 | =item B<does_role ($role_name)> |
789 | |
ac2dc464 |
790 | This will test if this class C<does> a given C<$role_name>. It will |
791 | not only check it's local roles, but ask them as well in order to |
02a0fb52 |
792 | cascade down the role hierarchy. |
793 | |
d79e62fd |
794 | =item B<excludes_role ($role_name)> |
795 | |
ac2dc464 |
796 | This will test if this class C<excludes> a given C<$role_name>. It will |
797 | not only check it's local roles, but ask them as well in order to |
d79e62fd |
798 | cascade down the role hierarchy. |
799 | |
9e93dd19 |
800 | =item B<add_attribute ($attr_name, %params|$params)> |
4e848edb |
801 | |
9e93dd19 |
802 | This method does the same thing as L<Class::MOP::Class::add_attribute>, but adds |
803 | support for taking the C<$params> as a HASH ref. |
ac1ef2f9 |
804 | |
e606ae5f |
805 | =item B<constructor_class ($class_name)> |
806 | |
807 | =item B<destructor_class ($class_name)> |
808 | |
809 | These are the names of classes used when making a class |
810 | immutable. These default to L<Moose::Meta::Method::Constructor> and |
811 | L<Moose::Meta::Method::Destructor> respectively. These accessors are |
812 | read-write, so you can use them to change the class name. |
813 | |
8b1d510f |
814 | =item B<error_class ($class_name)> |
815 | |
816 | The name of the class used to throw errors. This default to |
817 | L<Moose::Error::Default>, which generates an error with a stacktrace |
818 | just like C<Carp::confess>. |
819 | |
4fb87686 |
820 | =item B<check_metaclass_compatibility> |
821 | |
822 | Moose overrides this method from C<Class::MOP::Class> and attempts to |
823 | fix some incompatibilities before doing the check. |
824 | |
11c86f15 |
825 | =item B<throw_error $message, %extra> |
826 | |
827 | Throws the error created by C<create_error> using C<raise_error> |
828 | |
829 | =item B<create_error $message, %extra> |
830 | |
831 | Creates an error message or object. |
832 | |
833 | The default behavior is C<create_error_confess>. |
834 | |
835 | If C<error_class> is set uses C<create_error_object>. Otherwise uses |
836 | C<error_builder> (a code reference or variant name), and calls the appropriate |
837 | C<create_error_$builder> method. |
838 | |
839 | =item B<error_builder $builder_name> |
840 | |
841 | Get or set the error builder. Defaults to C<confess>. |
842 | |
843 | =item B<error_class $class_name> |
844 | |
50e9d6a5 |
845 | Get or set the error class. This defaults to L<Moose::Error::Default>. |
11c86f15 |
846 | |
847 | =item B<create_error_confess %args> |
848 | |
849 | Creates an error using L<Carp/longmess> |
850 | |
851 | =item B<create_error_croak %args> |
852 | |
853 | Creates an error using L<Carp/shortmess> |
854 | |
855 | =item B<create_error_object %args> |
856 | |
857 | Calls C<new> on the C<class> parameter in C<%args>. Usable with C<error_class> |
858 | to support custom error objects for your meta class. |
859 | |
860 | =item B<raise_error $error> |
861 | |
862 | Dies with an error object or string. |
863 | |
c0e30cf5 |
864 | =back |
865 | |
866 | =head1 BUGS |
867 | |
ac2dc464 |
868 | All complex software has bugs lurking in it, and this module is no |
c0e30cf5 |
869 | exception. If you find a bug please either email me, or add the bug |
870 | to cpan-RT. |
871 | |
c0e30cf5 |
872 | =head1 AUTHOR |
873 | |
874 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
875 | |
876 | =head1 COPYRIGHT AND LICENSE |
877 | |
778db3ac |
878 | Copyright 2006-2008 by Infinity Interactive, Inc. |
c0e30cf5 |
879 | |
880 | L<http://www.iinteractive.com> |
881 | |
882 | This library is free software; you can redistribute it and/or modify |
ac2dc464 |
883 | it under the same terms as Perl itself. |
c0e30cf5 |
884 | |
8a7a9c53 |
885 | =cut |
1a563243 |
886 | |