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1 | package Mouse::Meta::Module; |
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2 | use Mouse::Util qw/:meta get_code_package get_code_ref not_supported/; # enables strict and warnings |
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3 | |
b397e301 |
4 | use Carp (); |
5 | use Scalar::Util (); |
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6 | |
fe1221ad |
7 | my %METAS; |
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8 | |
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9 | if(Mouse::Util::MOUSE_XS){ |
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10 | # register meta storage for performance |
11 | Mouse::Util::__register_metaclass_storage(\%METAS, 0); |
12 | |
13 | # ensure thread safety |
14 | *CLONE = sub { Mouse::Util::__register_metaclass_storage(\%METAS, 1) }; |
15 | } |
16 | |
deb9a0f3 |
17 | sub _metaclass_cache { # DEPRECATED |
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18 | my($self, $name) = @_; |
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19 | Carp::cluck('_metaclass_cache() has been deprecated. Use Mouse::Util::get_metaclass_by_name() instead'); |
fe1221ad |
20 | return $METAS{$name}; |
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21 | } |
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22 | |
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23 | sub initialize { |
24 | my($class, $package_name, @args) = @_; |
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25 | |
739525d0 |
26 | ($package_name && !ref($package_name)) |
27 | || $class->throw_error("You must pass a package name and it cannot be blessed"); |
8536d351 |
28 | |
fe1221ad |
29 | return $METAS{$package_name} |
739525d0 |
30 | ||= $class->_construct_meta(package => $package_name, @args); |
31 | } |
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32 | |
542f20ad |
33 | sub reinitialize { |
34 | my($class, $package_name, @args) = @_; |
35 | |
f87debb9 |
36 | $package_name = $package_name->name if ref $package_name; |
37 | |
542f20ad |
38 | ($package_name && !ref($package_name)) |
39 | || $class->throw_error("You must pass a package name and it cannot be blessed"); |
40 | |
902174eb |
41 | if(exists $METAS{$package_name}) { |
42 | unshift @args, %{ $METAS{$package_name} }; |
43 | } |
542f20ad |
44 | delete $METAS{$package_name}; |
45 | return $class->initialize($package_name, @args); |
46 | } |
47 | |
48 | sub _class_of{ |
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49 | my($class_or_instance) = @_; |
50 | return undef unless defined $class_or_instance; |
23274b88 |
51 | return $METAS{ ref($class_or_instance) || $class_or_instance }; |
8536d351 |
52 | } |
53 | |
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54 | # Means of accessing all the metaclasses that have |
55 | # been initialized thus far |
542f20ad |
56 | #sub _get_all_metaclasses { %METAS } |
57 | sub _get_all_metaclass_instances { values %METAS } |
58 | sub _get_all_metaclass_names { keys %METAS } |
59 | sub _get_metaclass_by_name { $METAS{$_[0]} } |
60 | #sub _store_metaclass_by_name { $METAS{$_[0]} = $_[1] } |
61 | #sub _weaken_metaclass { weaken($METAS{$_[0]}) } |
62 | #sub _does_metaclass_exist { defined $METAS{$_[0]} } |
63 | #sub _remove_metaclass_by_name { delete $METAS{$_[0]} } |
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64 | |
43165725 |
65 | sub name; |
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66 | |
2591e962 |
67 | sub namespace; |
68 | |
8536d351 |
69 | # add_attribute is an abstract method |
70 | |
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71 | sub get_attribute_map { # DEPRECATED |
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72 | Carp::cluck('get_attribute_map() has been deprecated. Use get_attribute_list() and get_attribute() instead'); |
3a683350 |
73 | return $_[0]->{attributes}; |
74 | } |
75 | |
8536d351 |
76 | sub has_attribute { exists $_[0]->{attributes}->{$_[1]} } |
77 | sub get_attribute { $_[0]->{attributes}->{$_[1]} } |
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78 | sub remove_attribute { delete $_[0]->{attributes}->{$_[1]} } |
23264b5b |
79 | |
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80 | sub get_attribute_list{ keys %{$_[0]->{attributes}} } |
81 | |
01afd8ff |
82 | # XXX: for backward compatibility |
83 | my %foreign = map{ $_ => undef } qw( |
84 | Mouse Mouse::Role Mouse::Util Mouse::Util::TypeConstraints |
81bc0675 |
85 | Carp Scalar::Util List::Util |
01afd8ff |
86 | ); |
87 | sub _code_is_mine{ |
81bc0675 |
88 | # my($self, $code) = @_; |
8e64d0fa |
89 | |
81bc0675 |
90 | return !exists $foreign{ get_code_package($_[1]) }; |
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91 | } |
92 | |
3e44140b |
93 | sub add_method; |
94 | |
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95 | sub has_method { |
96 | my($self, $method_name) = @_; |
97 | |
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98 | defined($method_name) |
99 | or $self->throw_error('You must define a method name'); |
100 | |
81bc0675 |
101 | return defined($self->{methods}{$method_name}) || do{ |
102 | my $code = get_code_ref($self->{package}, $method_name); |
103 | $code && $self->_code_is_mine($code); |
104 | }; |
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105 | } |
106 | |
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107 | sub get_method_body { |
71e7b544 |
108 | my($self, $method_name) = @_; |
109 | |
110 | defined($method_name) |
111 | or $self->throw_error('You must define a method name'); |
112 | |
113 | return $self->{methods}{$method_name} ||= do{ |
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114 | my $code = get_code_ref($self->{package}, $method_name); |
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115 | $code && $self->_code_is_mine($code) ? $code : undef; |
71e7b544 |
116 | }; |
117 | } |
118 | |
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119 | sub get_method{ |
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120 | my($self, $method_name) = @_; |
121 | |
81bc0675 |
122 | if(my $code = $self->get_method_body($method_name)){ |
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123 | return Mouse::Util::load_class($self->method_metaclass)->wrap( |
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124 | body => $code, |
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125 | name => $method_name, |
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126 | package => $self->name, |
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127 | associated_metaclass => $self, |
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128 | ); |
129 | } |
130 | |
131 | return undef; |
8536d351 |
132 | } |
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133 | |
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134 | sub get_method_list { |
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135 | my($self) = @_; |
8e64d0fa |
136 | |
137 | return grep { $self->has_method($_) } keys %{ $self->namespace }; |
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138 | } |
139 | |
013ee5f0 |
140 | sub _collect_methods { # Mouse specific |
141 | my($meta, @args) = @_; |
142 | |
143 | my @methods; |
144 | foreach my $arg(@args){ |
145 | if(my $type = ref $arg){ |
146 | if($type eq 'Regexp'){ |
147 | push @methods, grep { $_ =~ $arg } $meta->get_all_method_names; |
148 | } |
149 | elsif($type eq 'ARRAY'){ |
150 | push @methods, @{$arg}; |
151 | } |
152 | else{ |
153 | my $subname = ( caller(1) )[3]; |
154 | $meta->throw_error( |
155 | sprintf( |
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156 | 'Methods passed to %s must be provided as a list,' |
157 | . ' ArrayRef or regular expression, not %s', |
013ee5f0 |
158 | $subname, |
159 | $type, |
160 | ) |
161 | ); |
162 | } |
163 | } |
164 | else{ |
165 | push @methods, $arg; |
166 | } |
167 | } |
168 | return @methods; |
169 | } |
170 | |
72dc2c9d |
171 | my $ANON_SERIAL = 0; # anonymous class/role id |
172 | my %IMMORTALS; # immortal anonymous classes |
013ee5f0 |
173 | |
72dc2c9d |
174 | sub create { |
175 | my($self, $package_name, %options) = @_; |
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176 | |
72dc2c9d |
177 | my $class = ref($self) || $self; |
178 | $self->throw_error('You must pass a package name') if @_ < 2; |
7a50b450 |
179 | |
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180 | my $superclasses; |
181 | if(exists $options{superclasses}){ |
182 | if(Mouse::Util::is_a_metarole($self)){ |
183 | delete $options{superclasses}; |
8f40866c |
184 | } |
72dc2c9d |
185 | else{ |
186 | $superclasses = delete $options{superclasses}; |
187 | (ref $superclasses eq 'ARRAY') |
188 | || $self->throw_error("You must pass an ARRAY ref of superclasses"); |
7a50b450 |
189 | } |
72dc2c9d |
190 | } |
7a50b450 |
191 | |
72dc2c9d |
192 | my $attributes = delete $options{attributes}; |
193 | if(defined $attributes){ |
194 | (ref $attributes eq 'ARRAY' || ref $attributes eq 'HASH') |
195 | || $self->throw_error("You must pass an ARRAY ref of attributes"); |
196 | } |
197 | my $methods = delete $options{methods}; |
198 | if(defined $methods){ |
199 | (ref $methods eq 'HASH') |
200 | || $self->throw_error("You must pass a HASH ref of methods"); |
201 | } |
202 | my $roles = delete $options{roles}; |
203 | if(defined $roles){ |
204 | (ref $roles eq 'ARRAY') |
205 | || $self->throw_error("You must pass an ARRAY ref of roles"); |
206 | } |
207 | my $mortal; |
208 | my $cache_key; |
209 | |
210 | if(!defined $package_name){ # anonymous |
211 | $mortal = !$options{cache}; |
212 | |
213 | # anonymous but immortal |
214 | if(!$mortal){ |
215 | # something like Super::Class|Super::Class::2=Role|Role::1 |
216 | $cache_key = join '=' => ( |
217 | join('|', @{$superclasses || []}), |
218 | join('|', sort @{$roles || []}), |
219 | ); |
220 | return $IMMORTALS{$cache_key} if exists $IMMORTALS{$cache_key}; |
7a50b450 |
221 | } |
72dc2c9d |
222 | $options{anon_serial_id} = ++$ANON_SERIAL; |
223 | $package_name = $class . '::__ANON__::' . $ANON_SERIAL; |
224 | } |
7a50b450 |
225 | |
72dc2c9d |
226 | # instantiate a module |
227 | { |
228 | no strict 'refs'; |
229 | ${ $package_name . '::VERSION' } = delete $options{version} if exists $options{version}; |
230 | ${ $package_name . '::AUTHORITY' } = delete $options{authority} if exists $options{authority}; |
231 | } |
232 | |
233 | my $meta = $self->initialize( $package_name, %options); |
234 | |
235 | Scalar::Util::weaken $METAS{$package_name} |
236 | if $mortal; |
237 | |
a062712d |
238 | $meta->add_method(meta => sub { |
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239 | $self->initialize(ref($_[0]) || $_[0]); |
240 | }); |
241 | |
242 | $meta->superclasses(@{$superclasses}) |
243 | if defined $superclasses; |
244 | |
245 | # NOTE: |
246 | # process attributes first, so that they can |
247 | # install accessors, but locally defined methods |
248 | # can then overwrite them. It is maybe a little odd, but |
249 | # I think this should be the order of things. |
250 | if (defined $attributes) { |
251 | if(ref($attributes) eq 'ARRAY'){ |
252 | # array of Mouse::Meta::Attribute |
253 | foreach my $attr (@{$attributes}) { |
254 | $meta->add_attribute($attr); |
7a50b450 |
255 | } |
256 | } |
72dc2c9d |
257 | else{ |
258 | # hash map of name and attribute spec pairs |
259 | while(my($name, $attr) = each %{$attributes}){ |
260 | $meta->add_attribute($name => $attr); |
7a50b450 |
261 | } |
262 | } |
72dc2c9d |
263 | } |
264 | if (defined $methods) { |
265 | while(my($method_name, $method_body) = each %{$methods}){ |
266 | $meta->add_method($method_name, $method_body); |
7a50b450 |
267 | } |
72dc2c9d |
268 | } |
269 | if (defined $roles){ |
270 | Mouse::Util::apply_all_roles($package_name, @{$roles}); |
271 | } |
7a50b450 |
272 | |
72dc2c9d |
273 | if($cache_key){ |
274 | $IMMORTALS{$cache_key} = $meta; |
7a50b450 |
275 | } |
276 | |
72dc2c9d |
277 | return $meta; |
278 | } |
7a50b450 |
279 | |
72dc2c9d |
280 | sub DESTROY{ |
281 | my($self) = @_; |
39a8df63 |
282 | |
72dc2c9d |
283 | return if $Mouse::Util::in_global_destruction; |
7a50b450 |
284 | |
72dc2c9d |
285 | my $serial_id = $self->{anon_serial_id}; |
72dc2c9d |
286 | return if !$serial_id; |
e75f21db |
287 | |
a4faea11 |
288 | # XXX: cleaning stash with threads causes panic/SEGV on legacy perls. |
20a12328 |
289 | if(exists $INC{'threads.pm'}) { |
290 | # (caller)[2] indicates the caller's line number, |
a4faea11 |
291 | # which is zero when the current thread is joining (destroying). |
20a12328 |
292 | return if( (caller)[2] == 0); |
293 | } |
294 | |
a4faea11 |
295 | # clean up mortal anonymous class stuff |
296 | |
297 | # @ISA is a magical variable, so we must clear it manually. |
72dc2c9d |
298 | @{$self->{superclasses}} = () if exists $self->{superclasses}; |
7a50b450 |
299 | |
72dc2c9d |
300 | # Then, clear the symbol table hash |
301 | %{$self->namespace} = (); |
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302 | |
72dc2c9d |
303 | my $name = $self->name; |
304 | delete $METAS{$name}; |
7a50b450 |
305 | |
72dc2c9d |
306 | $name =~ s/ $serial_id \z//xms; |
72dc2c9d |
307 | no strict 'refs'; |
308 | delete ${$name}{ $serial_id . '::' }; |
72dc2c9d |
309 | return; |
7a50b450 |
310 | } |
311 | |
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312 | |
313 | 1; |
3a63a2e7 |
314 | __END__ |
315 | |
316 | =head1 NAME |
317 | |
a4faea11 |
318 | Mouse::Meta::Module - The common base class of Mouse::Meta::Class and Mouse::Meta::Role |
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319 | |
a25ca8d6 |
320 | =head1 VERSION |
321 | |
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322 | This document describes Mouse version 0.71 |
a25ca8d6 |
323 | |
503ed648 |
324 | =head1 DESCRIPTION |
325 | |
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326 | This class is an abstract base class of meta classes and meta roles. |
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327 | |
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328 | =head1 SEE ALSO |
329 | |
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330 | L<Class::MOP::Class> |
331 | |
332 | L<Class::MOP::Module> |
333 | |
334 | L<Class::MOP::Package> |
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335 | |
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336 | =cut |
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337 | |