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 | |
df8260e9 |
14 | our $VERSION = '0.63'; |
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 | ### --------------------------------------------- |
199 | |
a2eec5e7 |
200 | sub add_attribute { |
201 | my $self = shift; |
e472c9a5 |
202 | $self->SUPER::add_attribute( |
203 | (blessed $_[0] && $_[0]->isa('Class::MOP::Attribute') |
204 | ? $_[0] |
205 | : $self->_process_attribute(@_)) |
206 | ); |
a2eec5e7 |
207 | } |
208 | |
78cd1d3b |
209 | sub add_override_method_modifier { |
210 | my ($self, $name, $method, $_super_package) = @_; |
18c2ec0e |
211 | |
d05cd563 |
212 | (!$self->has_method($name)) |
11c86f15 |
213 | || $self->throw_error("Cannot add an override method if a local method is already present"); |
18c2ec0e |
214 | |
215 | $self->add_method($name => Moose::Meta::Method::Overriden->new( |
3f9e4b0a |
216 | method => $method, |
217 | class => $self, |
218 | package => $_super_package, # need this for roles |
219 | name => $name, |
18c2ec0e |
220 | )); |
78cd1d3b |
221 | } |
222 | |
223 | sub add_augment_method_modifier { |
ac2dc464 |
224 | my ($self, $name, $method) = @_; |
d05cd563 |
225 | (!$self->has_method($name)) |
11c86f15 |
226 | || $self->throw_error("Cannot add an augment method if a local method is already present"); |
3f9e4b0a |
227 | |
228 | $self->add_method($name => Moose::Meta::Method::Augmented->new( |
229 | method => $method, |
230 | class => $self, |
231 | name => $name, |
232 | )); |
78cd1d3b |
233 | } |
234 | |
1341f10c |
235 | ## Private Utility methods ... |
236 | |
05d9eaf6 |
237 | sub _find_next_method_by_name_which_is_not_overridden { |
238 | my ($self, $name) = @_; |
68efb014 |
239 | foreach my $method ($self->find_all_methods_by_name($name)) { |
ac2dc464 |
240 | return $method->{code} |
05d9eaf6 |
241 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overriden'); |
242 | } |
243 | return undef; |
244 | } |
245 | |
41419b9e |
246 | sub _fix_metaclass_incompatibility { |
1341f10c |
247 | my ($self, @superclasses) = @_; |
e606ae5f |
248 | |
1341f10c |
249 | foreach my $super (@superclasses) { |
f8b6827f |
250 | next if $self->_superclass_meta_is_compatible($super); |
e606ae5f |
251 | |
252 | unless ( $self->is_pristine ) { |
f8b6827f |
253 | $self->throw_error( |
254 | "Cannot attempt to reinitialize metaclass for " |
255 | . $self->name |
256 | . ", it isn't pristine" ); |
1341f10c |
257 | } |
e606ae5f |
258 | |
0635500e |
259 | $self->_reconcile_with_superclass_meta($super); |
f8b6827f |
260 | } |
f8b6827f |
261 | } |
262 | |
263 | sub _superclass_meta_is_compatible { |
264 | my ($self, $super) = @_; |
265 | |
266 | my $super_meta = Class::MOP::Class->initialize($super) |
267 | or return 1; |
268 | |
269 | next unless $super_meta->isa("Class::MOP::Class"); |
270 | |
271 | my $super_meta_name |
272 | = $super_meta->is_immutable |
273 | ? $super_meta->get_mutable_metaclass_name |
274 | : ref($super_meta); |
275 | |
276 | return 1 |
277 | if $self->isa($super_meta_name) |
278 | and |
279 | $self->instance_metaclass->isa( $super_meta->instance_metaclass ); |
280 | } |
281 | |
282 | # I don't want to have to type this >1 time |
283 | my @MetaClassTypes = |
8b1d510f |
284 | qw( attribute_metaclass method_metaclass instance_metaclass |
285 | constructor_class destructor_class error_class ); |
f8b6827f |
286 | |
287 | sub _reconcile_with_superclass_meta { |
288 | my ($self, $super) = @_; |
289 | |
290 | my $super_meta = $super->meta; |
291 | |
dd37a5be |
292 | my $super_meta_name |
f8b6827f |
293 | = $super_meta->is_immutable |
294 | ? $super_meta->get_mutable_metaclass_name |
295 | : ref($super_meta); |
e606ae5f |
296 | |
f8b6827f |
297 | my $self_metaclass = ref $self; |
298 | |
299 | # If neither of these is true we have a more serious |
300 | # incompatibility that we just cannot fix (yet?). |
dd37a5be |
301 | if ( $super_meta_name->isa( ref $self ) |
f8b6827f |
302 | && all { $super_meta->$_->isa( $self->$_ ) } @MetaClassTypes ) { |
0635500e |
303 | $self->_reinitialize_with($super_meta); |
f8b6827f |
304 | } |
305 | elsif ( $self->_all_metaclasses_differ_by_roles_only($super_meta) ) { |
0635500e |
306 | $self->_reconcile_role_differences($super_meta); |
1341f10c |
307 | } |
1341f10c |
308 | } |
309 | |
f8b6827f |
310 | sub _reinitialize_with { |
311 | my ( $self, $new_meta ) = @_; |
312 | |
0635500e |
313 | my $new_self = $new_meta->reinitialize( |
f8b6827f |
314 | $self->name, |
315 | attribute_metaclass => $new_meta->attribute_metaclass, |
316 | method_metaclass => $new_meta->method_metaclass, |
317 | instance_metaclass => $new_meta->instance_metaclass, |
318 | ); |
319 | |
8b1d510f |
320 | $new_self->$_( $new_meta->$_ ) |
321 | for qw( constructor_class destructor_class error_class ); |
f8b6827f |
322 | |
0635500e |
323 | %$self = %$new_self; |
324 | |
325 | bless $self, ref $new_self; |
326 | |
4c5fcc12 |
327 | # We need to replace the cached metaclass instance or else when it |
328 | # goes out of scope Class::MOP::Class destroy's the namespace for |
329 | # the metaclass's class, causing much havoc. |
0635500e |
330 | Class::MOP::store_metaclass_by_name( $self->name, $self ); |
4c5fcc12 |
331 | Class::MOP::weaken_metaclass( $self->name ) if $self->is_anon_class; |
f8b6827f |
332 | } |
333 | |
334 | # In the more complex case, we share a common ancestor with our |
335 | # superclass's metaclass, but each metaclass (ours and the parent's) |
336 | # has a different set of roles applied. We reconcile this by first |
337 | # reinitializing into the parent class, and _then_ applying our own |
338 | # roles. |
339 | sub _all_metaclasses_differ_by_roles_only { |
340 | my ($self, $super_meta) = @_; |
341 | |
342 | for my $pair ( |
343 | [ ref $self, ref $super_meta ], |
344 | map { [ $self->$_, $super_meta->$_ ] } @MetaClassTypes |
345 | ) { |
346 | |
347 | next if $pair->[0] eq $pair->[1]; |
348 | |
349 | my $self_meta_meta = Class::MOP::Class->initialize( $pair->[0] ); |
350 | my $super_meta_meta = Class::MOP::Class->initialize( $pair->[1] ); |
351 | |
352 | my $common_ancestor |
353 | = _find_common_ancestor( $self_meta_meta, $super_meta_meta ); |
354 | |
355 | return unless $common_ancestor; |
356 | |
357 | return |
358 | unless _is_role_only_subclass_of( |
359 | $self_meta_meta, |
360 | $common_ancestor, |
361 | ) |
362 | && _is_role_only_subclass_of( |
363 | $super_meta_meta, |
364 | $common_ancestor, |
365 | ); |
366 | } |
367 | |
368 | return 1; |
369 | } |
370 | |
371 | # This, and some other functions, could be called as methods, but |
372 | # they're not for two reasons. One, we just end up ignoring the first |
373 | # argument, because we can't call these directly on one of the real |
374 | # arguments, because one of them could be a Class::MOP::Class object |
375 | # and not a Moose::Meta::Class. Second, only a completely insane |
376 | # person would attempt to subclass this stuff! |
377 | sub _find_common_ancestor { |
378 | my ($meta1, $meta2) = @_; |
379 | |
380 | # FIXME? This doesn't account for multiple inheritance (not sure |
381 | # if it needs to though). For example, is somewhere in $meta1's |
382 | # history it inherits from both ClassA and ClassB, and $meta |
383 | # inherits from ClassB & ClassA, does it matter? And what crazy |
384 | # fool would do that anyway? |
385 | |
386 | my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa; |
387 | |
388 | return first { $meta1_parents{$_} } $meta2->linearized_isa; |
389 | } |
390 | |
391 | sub _is_role_only_subclass_of { |
392 | my ($meta, $ancestor) = @_; |
393 | |
394 | return 1 if $meta->name eq $ancestor; |
395 | |
396 | my @roles = _all_roles_until( $meta, $ancestor ); |
397 | |
398 | my %role_packages = map { $_->name => 1 } @roles; |
399 | |
400 | my $ancestor_meta = Class::MOP::Class->initialize($ancestor); |
401 | |
402 | my %shared_ancestors = map { $_ => 1 } $ancestor_meta->linearized_isa; |
403 | |
404 | for my $method ( $meta->get_all_methods() ) { |
405 | next if $method->name eq 'meta'; |
406 | next if $method->can('associated_attribute'); |
407 | |
408 | next |
409 | if $role_packages{ $method->original_package_name } |
410 | || $shared_ancestors{ $method->original_package_name }; |
411 | |
412 | return 0; |
413 | } |
414 | |
415 | # FIXME - this really isn't right. Just because an attribute is |
416 | # defined in a role doesn't mean it isn't _also_ defined in the |
417 | # subclass. |
418 | for my $attr ( $meta->get_all_attributes ) { |
419 | next if $shared_ancestors{ $attr->associated_class->name }; |
420 | |
421 | next if any { $_->has_attribute( $attr->name ) } @roles; |
422 | |
423 | return 0; |
424 | } |
425 | |
426 | return 1; |
427 | } |
428 | |
429 | sub _all_roles { |
430 | my $meta = shift; |
431 | |
432 | return _all_roles_until($meta); |
433 | } |
434 | |
435 | sub _all_roles_until { |
436 | my ($meta, $stop_at_class) = @_; |
437 | |
438 | return unless $meta->can('calculate_all_roles'); |
439 | |
440 | my @roles = $meta->calculate_all_roles; |
441 | |
442 | for my $class ( $meta->linearized_isa ) { |
443 | last if $stop_at_class && $stop_at_class eq $class; |
444 | |
445 | my $meta = Class::MOP::Class->initialize($class); |
446 | last unless $meta->can('calculate_all_roles'); |
447 | |
448 | push @roles, $meta->calculate_all_roles; |
449 | } |
450 | |
8b1d510f |
451 | return uniq @roles; |
f8b6827f |
452 | } |
453 | |
454 | sub _reconcile_role_differences { |
455 | my ($self, $super_meta) = @_; |
456 | |
457 | my $self_meta = $self->meta; |
458 | |
459 | my %roles; |
460 | |
461 | if ( my @roles = map { $_->name } _all_roles($self_meta) ) { |
462 | $roles{metaclass_roles} = \@roles; |
463 | } |
464 | |
465 | for my $thing (@MetaClassTypes) { |
466 | my $name = $self->$thing(); |
467 | |
468 | my $thing_meta = Class::MOP::Class->initialize($name); |
469 | |
470 | my @roles = map { $_->name } _all_roles($thing_meta) |
471 | or next; |
472 | |
473 | $roles{ $thing . '_roles' } = \@roles; |
474 | } |
475 | |
2b72f3b4 |
476 | $self->_reinitialize_with($super_meta); |
f8b6827f |
477 | |
478 | Moose::Util::MetaRole::apply_metaclass_roles( |
479 | for_class => $self->name, |
480 | %roles, |
481 | ); |
482 | |
483 | return $self; |
484 | } |
485 | |
d7d8a8c7 |
486 | # NOTE: |
d9bb6c63 |
487 | # this was crap anyway, see |
488 | # Moose::Util::apply_all_roles |
d7d8a8c7 |
489 | # instead |
4498537c |
490 | sub _apply_all_roles { |
547dda77 |
491 | Carp::croak 'DEPRECATED: use Moose::Util::apply_all_roles($meta, @roles) instead' |
4498537c |
492 | } |
1341f10c |
493 | |
494 | sub _process_attribute { |
a3738e5b |
495 | my ( $self, $name, @args ) = @_; |
7e59b803 |
496 | |
497 | @args = %{$args[0]} if scalar @args == 1 && ref($args[0]) eq 'HASH'; |
d9bb6c63 |
498 | |
f9b5f5f8 |
499 | if (($name || '') =~ /^\+(.*)/) { |
7e59b803 |
500 | return $self->_process_inherited_attribute($1, @args); |
1341f10c |
501 | } |
502 | else { |
7e59b803 |
503 | return $self->_process_new_attribute($name, @args); |
504 | } |
505 | } |
506 | |
507 | sub _process_new_attribute { |
508 | my ( $self, $name, @args ) = @_; |
7e59b803 |
509 | |
d5c30e52 |
510 | $self->attribute_metaclass->interpolate_class_and_new($name, @args); |
1341f10c |
511 | } |
512 | |
513 | sub _process_inherited_attribute { |
514 | my ($self, $attr_name, %options) = @_; |
515 | my $inherited_attr = $self->find_attribute_by_name($attr_name); |
516 | (defined $inherited_attr) |
11c86f15 |
517 | || $self->throw_error("Could not find an attribute by the name of '$attr_name' to inherit from", data => $attr_name); |
1341f10c |
518 | if ($inherited_attr->isa('Moose::Meta::Attribute')) { |
d7d8a8c7 |
519 | return $inherited_attr->clone_and_inherit_options(%options); |
1341f10c |
520 | } |
521 | else { |
522 | # NOTE: |
523 | # kind of a kludge to handle Class::MOP::Attributes |
d7d8a8c7 |
524 | return $inherited_attr->Moose::Meta::Attribute::clone_and_inherit_options(%options); |
ac2dc464 |
525 | } |
1341f10c |
526 | } |
527 | |
5cf3dbcf |
528 | ## ------------------------------------------------- |
529 | |
530 | use Moose::Meta::Method::Constructor; |
1f779926 |
531 | use Moose::Meta::Method::Destructor; |
5cf3dbcf |
532 | |
ac2dc464 |
533 | # This could be done by using SUPER and altering ->options |
534 | # I am keeping it this way to make it more explicit. |
535 | sub create_immutable_transformer { |
536 | my $self = shift; |
537 | my $class = Class::MOP::Immutable->new($self, { |
e606ae5f |
538 | read_only => [qw/superclasses/], |
539 | cannot_call => [qw/ |
540 | add_method |
541 | alias_method |
542 | remove_method |
543 | add_attribute |
544 | remove_attribute |
545 | remove_package_symbol |
546 | add_role |
547 | /], |
548 | memoize => { |
549 | class_precedence_list => 'ARRAY', |
550 | linearized_isa => 'ARRAY', # FIXME perl 5.10 memoizes this on its own, no need? |
551 | get_all_methods => 'ARRAY', |
552 | #get_all_attributes => 'ARRAY', # it's an alias, no need, but maybe in the future |
553 | compute_all_applicable_attributes => 'ARRAY', |
554 | get_meta_instance => 'SCALAR', |
555 | get_method_map => 'SCALAR', |
556 | calculate_all_roles => 'ARRAY', |
557 | }, |
558 | # NOTE: |
559 | # this is ugly, but so are typeglobs, |
560 | # so whattayahgonnadoboutit |
561 | # - SL |
562 | wrapped => { |
563 | add_package_symbol => sub { |
564 | my $original = shift; |
565 | $self->throw_error("Cannot add package symbols to an immutable metaclass") |
566 | unless (caller(2))[3] eq 'Class::MOP::Package::get_package_symbol'; |
567 | goto $original->body; |
568 | }, |
569 | }, |
ac2dc464 |
570 | }); |
571 | return $class; |
572 | } |
573 | |
574 | sub make_immutable { |
575 | my $self = shift; |
576 | $self->SUPER::make_immutable |
577 | ( |
e606ae5f |
578 | constructor_class => $self->constructor_class, |
579 | destructor_class => $self->destructor_class, |
ac2dc464 |
580 | inline_destructor => 1, |
581 | # NOTE: |
582 | # no need to do this, |
583 | # Moose always does it |
584 | inline_accessors => 0, |
585 | @_, |
586 | ); |
5cf3dbcf |
587 | } |
588 | |
bf6fa6b3 |
589 | our $error_level; |
11c86f15 |
590 | |
591 | sub throw_error { |
592 | my ( $self, @args ) = @_; |
bf6fa6b3 |
593 | local $error_level = ($error_level || 0) + 1; |
11c86f15 |
594 | $self->raise_error($self->create_error(@args)); |
595 | } |
596 | |
597 | sub raise_error { |
598 | my ( $self, @args ) = @_; |
599 | die @args; |
600 | } |
601 | |
602 | sub create_error { |
603 | my ( $self, @args ) = @_; |
604 | |
18748ad6 |
605 | require Carp::Heavy; |
606 | |
bf6fa6b3 |
607 | local $error_level = ($error_level || 0 ) + 1; |
18748ad6 |
608 | |
11c86f15 |
609 | if ( @args % 2 == 1 ) { |
610 | unshift @args, "message"; |
611 | } |
612 | |
fcab1742 |
613 | my %args = ( metaclass => $self, last_error => $@, @args ); |
11c86f15 |
614 | |
bf6fa6b3 |
615 | $args{depth} += $error_level; |
11c86f15 |
616 | |
bf6fa6b3 |
617 | my $class = ref $self ? $self->error_class : "Moose::Error::Default"; |
11c86f15 |
618 | |
a810a01f |
619 | Class::MOP::load_class($class); |
620 | |
11c86f15 |
621 | $class->new( |
bf6fa6b3 |
622 | Carp::caller_info($args{depth}), |
623 | %args |
11c86f15 |
624 | ); |
625 | } |
626 | |
c0e30cf5 |
627 | 1; |
628 | |
629 | __END__ |
630 | |
631 | =pod |
632 | |
633 | =head1 NAME |
634 | |
e522431d |
635 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
636 | |
c0e30cf5 |
637 | =head1 DESCRIPTION |
638 | |
ac2dc464 |
639 | This is a subclass of L<Class::MOP::Class> with Moose specific |
e522431d |
640 | extensions. |
641 | |
ac2dc464 |
642 | For the most part, the only time you will ever encounter an |
643 | instance of this class is if you are doing some serious deep |
644 | introspection. To really understand this class, you need to refer |
6ba6d68c |
645 | to the L<Class::MOP::Class> documentation. |
646 | |
c0e30cf5 |
647 | =head1 METHODS |
648 | |
649 | =over 4 |
650 | |
590868a3 |
651 | =item B<initialize> |
652 | |
61bdd94f |
653 | =item B<create> |
654 | |
17594769 |
655 | Overrides original to accept a list of roles to apply to |
61bdd94f |
656 | the created class. |
657 | |
17594769 |
658 | my $metaclass = Moose::Meta::Class->create( 'New::Class', roles => [...] ); |
659 | |
660 | =item B<create_anon_class> |
661 | |
662 | Overrides original to support roles and caching. |
663 | |
664 | my $metaclass = Moose::Meta::Class->create_anon_class( |
665 | superclasses => ['Foo'], |
666 | roles => [qw/Some Roles Go Here/], |
667 | cache => 1, |
668 | ); |
669 | |
5cf3dbcf |
670 | =item B<make_immutable> |
671 | |
ac2dc464 |
672 | Override original to add default options for inlining destructor |
673 | and altering the Constructor metaclass. |
674 | |
675 | =item B<create_immutable_transformer> |
676 | |
677 | Override original to lock C<add_role> and memoize C<calculate_all_roles> |
678 | |
8c9d74e7 |
679 | =item B<new_object> |
680 | |
02a0fb52 |
681 | We override this method to support the C<trigger> attribute option. |
682 | |
a15dff8d |
683 | =item B<construct_instance> |
684 | |
ac2dc464 |
685 | This provides some Moose specific extensions to this method, you |
686 | almost never call this method directly unless you really know what |
687 | you are doing. |
6ba6d68c |
688 | |
689 | This method makes sure to handle the moose weak-ref, type-constraint |
ac2dc464 |
690 | and type coercion features. |
ef1d5f4b |
691 | |
093b12c2 |
692 | =item B<get_method_map> |
e9ec68d6 |
693 | |
ac2dc464 |
694 | This accommodates Moose::Meta::Role::Method instances, which are |
695 | aliased, instead of added, but still need to be counted as valid |
e9ec68d6 |
696 | methods. |
697 | |
78cd1d3b |
698 | =item B<add_override_method_modifier ($name, $method)> |
699 | |
ac2dc464 |
700 | This will create an C<override> method modifier for you, and install |
02a0fb52 |
701 | it in the package. |
702 | |
78cd1d3b |
703 | =item B<add_augment_method_modifier ($name, $method)> |
704 | |
ac2dc464 |
705 | This will create an C<augment> method modifier for you, and install |
02a0fb52 |
706 | it in the package. |
707 | |
2b14ac61 |
708 | =item B<calculate_all_roles> |
709 | |
ef333f17 |
710 | =item B<roles> |
711 | |
ac2dc464 |
712 | This will return an array of C<Moose::Meta::Role> instances which are |
02a0fb52 |
713 | attached to this class. |
714 | |
ef333f17 |
715 | =item B<add_role ($role)> |
716 | |
ac2dc464 |
717 | This takes an instance of C<Moose::Meta::Role> in C<$role>, and adds it |
02a0fb52 |
718 | to the list of associated roles. |
719 | |
ef333f17 |
720 | =item B<does_role ($role_name)> |
721 | |
ac2dc464 |
722 | This will test if this class C<does> a given C<$role_name>. It will |
723 | not only check it's local roles, but ask them as well in order to |
02a0fb52 |
724 | cascade down the role hierarchy. |
725 | |
d79e62fd |
726 | =item B<excludes_role ($role_name)> |
727 | |
ac2dc464 |
728 | This will test if this class C<excludes> a given C<$role_name>. It will |
729 | not only check it's local roles, but ask them as well in order to |
d79e62fd |
730 | cascade down the role hierarchy. |
731 | |
9e93dd19 |
732 | =item B<add_attribute ($attr_name, %params|$params)> |
4e848edb |
733 | |
9e93dd19 |
734 | This method does the same thing as L<Class::MOP::Class::add_attribute>, but adds |
735 | support for taking the C<$params> as a HASH ref. |
ac1ef2f9 |
736 | |
e606ae5f |
737 | =item B<constructor_class ($class_name)> |
738 | |
739 | =item B<destructor_class ($class_name)> |
740 | |
741 | These are the names of classes used when making a class |
742 | immutable. These default to L<Moose::Meta::Method::Constructor> and |
743 | L<Moose::Meta::Method::Destructor> respectively. These accessors are |
744 | read-write, so you can use them to change the class name. |
745 | |
8b1d510f |
746 | =item B<error_class ($class_name)> |
747 | |
748 | The name of the class used to throw errors. This default to |
749 | L<Moose::Error::Default>, which generates an error with a stacktrace |
750 | just like C<Carp::confess>. |
751 | |
4fb87686 |
752 | =item B<check_metaclass_compatibility> |
753 | |
754 | Moose overrides this method from C<Class::MOP::Class> and attempts to |
755 | fix some incompatibilities before doing the check. |
756 | |
11c86f15 |
757 | =item B<throw_error $message, %extra> |
758 | |
759 | Throws the error created by C<create_error> using C<raise_error> |
760 | |
761 | =item B<create_error $message, %extra> |
762 | |
763 | Creates an error message or object. |
764 | |
765 | The default behavior is C<create_error_confess>. |
766 | |
767 | If C<error_class> is set uses C<create_error_object>. Otherwise uses |
768 | C<error_builder> (a code reference or variant name), and calls the appropriate |
769 | C<create_error_$builder> method. |
770 | |
771 | =item B<error_builder $builder_name> |
772 | |
773 | Get or set the error builder. Defaults to C<confess>. |
774 | |
775 | =item B<error_class $class_name> |
776 | |
50e9d6a5 |
777 | Get or set the error class. This defaults to L<Moose::Error::Default>. |
11c86f15 |
778 | |
779 | =item B<create_error_confess %args> |
780 | |
781 | Creates an error using L<Carp/longmess> |
782 | |
783 | =item B<create_error_croak %args> |
784 | |
785 | Creates an error using L<Carp/shortmess> |
786 | |
787 | =item B<create_error_object %args> |
788 | |
789 | Calls C<new> on the C<class> parameter in C<%args>. Usable with C<error_class> |
790 | to support custom error objects for your meta class. |
791 | |
792 | =item B<raise_error $error> |
793 | |
794 | Dies with an error object or string. |
795 | |
c0e30cf5 |
796 | =back |
797 | |
798 | =head1 BUGS |
799 | |
ac2dc464 |
800 | All complex software has bugs lurking in it, and this module is no |
c0e30cf5 |
801 | exception. If you find a bug please either email me, or add the bug |
802 | to cpan-RT. |
803 | |
c0e30cf5 |
804 | =head1 AUTHOR |
805 | |
806 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
807 | |
808 | =head1 COPYRIGHT AND LICENSE |
809 | |
778db3ac |
810 | Copyright 2006-2008 by Infinity Interactive, Inc. |
c0e30cf5 |
811 | |
812 | L<http://www.iinteractive.com> |
813 | |
814 | This library is free software; you can redistribute it and/or modify |
ac2dc464 |
815 | it under the same terms as Perl itself. |
c0e30cf5 |
816 | |
8a7a9c53 |
817 | =cut |
1a563243 |
818 | |