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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 load_class not_supported/; # enables strict and warnings |
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3 | |
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4 | use Carp (); |
5 | use Scalar::Util (); |
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6 | |
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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 | |
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17 | sub _metaclass_cache { # DEPRECATED |
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18 | my($class, $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, $package_name, @args) = @_; |
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25 | |
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26 | ($package_name && !ref($package_name)) |
27 | || $class->throw_error("You must pass a package name and it cannot be blessed"); |
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28 | |
fe1221ad |
29 | return $METAS{$package_name} |
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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 | |
41 | delete $METAS{$package_name}; |
42 | return $class->initialize($package_name, @args); |
43 | } |
44 | |
45 | sub _class_of{ |
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46 | my($class_or_instance) = @_; |
47 | return undef unless defined $class_or_instance; |
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48 | return $METAS{ ref($class_or_instance) || $class_or_instance }; |
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49 | } |
50 | |
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51 | # Means of accessing all the metaclasses that have |
52 | # been initialized thus far |
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53 | #sub _get_all_metaclasses { %METAS } |
54 | sub _get_all_metaclass_instances { values %METAS } |
55 | sub _get_all_metaclass_names { keys %METAS } |
56 | sub _get_metaclass_by_name { $METAS{$_[0]} } |
57 | #sub _store_metaclass_by_name { $METAS{$_[0]} = $_[1] } |
58 | #sub _weaken_metaclass { weaken($METAS{$_[0]}) } |
59 | #sub _does_metaclass_exist { defined $METAS{$_[0]} } |
60 | #sub _remove_metaclass_by_name { delete $METAS{$_[0]} } |
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61 | |
43165725 |
62 | sub name; |
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63 | |
2591e962 |
64 | sub namespace; |
65 | |
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66 | # The followings are Class::MOP specific methods |
67 | |
68 | #sub version { no strict 'refs'; ${shift->name.'::VERSION'} } |
69 | #sub authority { no strict 'refs'; ${shift->name.'::AUTHORITY'} } |
70 | #sub identifier { |
71 | # my $self = shift; |
72 | # return join '-' => ( |
73 | # $self->name, |
74 | # ($self->version || ()), |
75 | # ($self->authority || ()), |
76 | # ); |
77 | #} |
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78 | |
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79 | # add_attribute is an abstract method |
80 | |
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81 | sub get_attribute_map { # DEPRECATED |
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82 | Carp::cluck('get_attribute_map() has been deprecated. Use get_attribute_list() and get_attribute() instead'); |
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83 | return $_[0]->{attributes}; |
84 | } |
85 | |
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86 | sub has_attribute { exists $_[0]->{attributes}->{$_[1]} } |
87 | sub get_attribute { $_[0]->{attributes}->{$_[1]} } |
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88 | sub remove_attribute { delete $_[0]->{attributes}->{$_[1]} } |
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89 | |
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90 | sub get_attribute_list{ keys %{$_[0]->{attributes}} } |
91 | |
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92 | # XXX: for backward compatibility |
93 | my %foreign = map{ $_ => undef } qw( |
94 | Mouse Mouse::Role Mouse::Util Mouse::Util::TypeConstraints |
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95 | Carp Scalar::Util List::Util |
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96 | ); |
97 | sub _code_is_mine{ |
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98 | # my($self, $code) = @_; |
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99 | |
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100 | return !exists $foreign{ get_code_package($_[1]) }; |
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101 | } |
102 | |
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103 | sub add_method; |
104 | |
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105 | sub has_method { |
106 | my($self, $method_name) = @_; |
107 | |
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108 | defined($method_name) |
109 | or $self->throw_error('You must define a method name'); |
110 | |
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111 | return defined($self->{methods}{$method_name}) || do{ |
112 | my $code = get_code_ref($self->{package}, $method_name); |
113 | $code && $self->_code_is_mine($code); |
114 | }; |
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115 | } |
116 | |
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117 | sub get_method_body { |
71e7b544 |
118 | my($self, $method_name) = @_; |
119 | |
120 | defined($method_name) |
121 | or $self->throw_error('You must define a method name'); |
122 | |
123 | return $self->{methods}{$method_name} ||= do{ |
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124 | my $code = get_code_ref($self->{package}, $method_name); |
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125 | $code && $self->_code_is_mine($code) ? $code : undef; |
71e7b544 |
126 | }; |
127 | } |
128 | |
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129 | sub get_method{ |
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130 | my($self, $method_name) = @_; |
131 | |
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132 | if(my $code = $self->get_method_body($method_name)){ |
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133 | my $method_metaclass = $self->method_metaclass; |
134 | load_class($method_metaclass); |
135 | |
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136 | return $method_metaclass->wrap( |
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137 | body => $code, |
9010458d |
138 | name => $method_name, |
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139 | package => $self->name, |
9010458d |
140 | associated_metaclass => $self, |
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141 | ); |
142 | } |
143 | |
144 | return undef; |
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145 | } |
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146 | |
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147 | sub get_method_list { |
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148 | my($self) = @_; |
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149 | |
150 | return grep { $self->has_method($_) } keys %{ $self->namespace }; |
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151 | } |
152 | |
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153 | sub _collect_methods { # Mouse specific |
154 | my($meta, @args) = @_; |
155 | |
156 | my @methods; |
157 | foreach my $arg(@args){ |
158 | if(my $type = ref $arg){ |
159 | if($type eq 'Regexp'){ |
160 | push @methods, grep { $_ =~ $arg } $meta->get_all_method_names; |
161 | } |
162 | elsif($type eq 'ARRAY'){ |
163 | push @methods, @{$arg}; |
164 | } |
165 | else{ |
166 | my $subname = ( caller(1) )[3]; |
167 | $meta->throw_error( |
168 | sprintf( |
169 | 'Methods passed to %s must be provided as a list, ArrayRef or regular expression, not %s', |
170 | $subname, |
171 | $type, |
172 | ) |
173 | ); |
174 | } |
175 | } |
176 | else{ |
177 | push @methods, $arg; |
178 | } |
179 | } |
180 | return @methods; |
181 | } |
182 | |
183 | |
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184 | { |
185 | my $ANON_SERIAL = 0; |
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186 | |
187 | my %IMMORTALS; |
188 | |
189 | sub create { |
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190 | my($self, $package_name, %options) = @_; |
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191 | |
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192 | my $class = ref($self) || $self; |
193 | $self->throw_error('You must pass a package name') if @_ < 2; |
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194 | |
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195 | my $superclasses; |
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196 | if(exists $options{superclasses}){ |
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197 | if(Mouse::Util::is_a_metarole($self)){ |
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198 | delete $options{superclasses}; |
199 | } |
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200 | else{ |
201 | $superclasses = delete $options{superclasses}; |
202 | (ref $superclasses eq 'ARRAY') |
7eb3a8d5 |
203 | || $self->throw_error("You must pass an ARRAY ref of superclasses"); |
8f40866c |
204 | } |
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205 | } |
206 | |
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207 | my $attributes = delete $options{attributes}; |
208 | if(defined $attributes){ |
209 | (ref $attributes eq 'ARRAY' || ref $attributes eq 'HASH') |
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210 | || $self->throw_error("You must pass an ARRAY ref of attributes"); |
8f40866c |
211 | } |
212 | my $methods = delete $options{methods}; |
213 | if(defined $methods){ |
214 | (ref $methods eq 'HASH') |
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215 | || $self->throw_error("You must pass a HASH ref of methods"); |
8f40866c |
216 | } |
217 | my $roles = delete $options{roles}; |
218 | if(defined $roles){ |
219 | (ref $roles eq 'ARRAY') |
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220 | || $self->throw_error("You must pass an ARRAY ref of roles"); |
8f40866c |
221 | } |
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222 | my $mortal; |
223 | my $cache_key; |
224 | |
225 | if(!defined $package_name){ # anonymous |
226 | $mortal = !$options{cache}; |
227 | |
228 | # anonymous but immortal |
229 | if(!$mortal){ |
8e64d0fa |
230 | # something like Super::Class|Super::Class::2=Role|Role::1 |
231 | $cache_key = join '=' => ( |
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232 | join('|', @{$superclasses || []}), |
233 | join('|', sort @{$roles || []}), |
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234 | ); |
235 | return $IMMORTALS{$cache_key} if exists $IMMORTALS{$cache_key}; |
236 | } |
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237 | $options{anon_serial_id} = ++$ANON_SERIAL; |
238 | $package_name = $class . '::__ANON__::' . $ANON_SERIAL; |
7a50b450 |
239 | } |
240 | |
241 | # instantiate a module |
242 | { |
243 | no strict 'refs'; |
244 | ${ $package_name . '::VERSION' } = delete $options{version} if exists $options{version}; |
245 | ${ $package_name . '::AUTHORITY' } = delete $options{authority} if exists $options{authority}; |
246 | } |
247 | |
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248 | my $meta = $self->initialize( $package_name, %options); |
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249 | |
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250 | Scalar::Util::weaken $METAS{$package_name} |
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251 | if $mortal; |
252 | |
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253 | $meta->add_method(meta => sub{ |
254 | $self->initialize(ref($_[0]) || $_[0]); |
7a50b450 |
255 | }); |
256 | |
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257 | $meta->superclasses(@{$superclasses}) |
258 | if defined $superclasses; |
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259 | |
260 | # NOTE: |
261 | # process attributes first, so that they can |
262 | # install accessors, but locally defined methods |
263 | # can then overwrite them. It is maybe a little odd, but |
264 | # I think this should be the order of things. |
265 | if (defined $attributes) { |
266 | if(ref($attributes) eq 'ARRAY'){ |
8f40866c |
267 | # array of Mouse::Meta::Attribute |
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268 | foreach my $attr (@{$attributes}) { |
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269 | $meta->add_attribute($attr); |
7a50b450 |
270 | } |
271 | } |
272 | else{ |
8f40866c |
273 | # hash map of name and attribute spec pairs |
7a50b450 |
274 | while(my($name, $attr) = each %{$attributes}){ |
275 | $meta->add_attribute($name => $attr); |
276 | } |
277 | } |
278 | } |
8f40866c |
279 | if (defined $methods) { |
280 | while(my($method_name, $method_body) = each %{$methods}){ |
281 | $meta->add_method($method_name, $method_body); |
7a50b450 |
282 | } |
283 | } |
8f40866c |
284 | if (defined $roles){ |
285 | Mouse::Util::apply_all_roles($package_name, @{$roles}); |
7a50b450 |
286 | } |
287 | |
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288 | if($cache_key){ |
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289 | $IMMORTALS{$cache_key} = $meta; |
290 | } |
291 | |
292 | return $meta; |
293 | } |
294 | |
295 | sub DESTROY{ |
296 | my($self) = @_; |
297 | |
39a8df63 |
298 | return if $Mouse::Util::in_global_destruction; |
299 | |
7a50b450 |
300 | my $serial_id = $self->{anon_serial_id}; |
301 | |
302 | return if !$serial_id; |
303 | |
e75f21db |
304 | # @ISA is a magical variable, so we clear it manually. |
305 | @{$self->{superclasses}} = () if exists $self->{superclasses}; |
306 | |
307 | # Then, clear the symbol table hash |
308 | %{$self->namespace} = (); |
7a50b450 |
309 | |
8f40866c |
310 | my $name = $self->name; |
311 | delete $METAS{$name}; |
312 | |
e75f21db |
313 | $name =~ s/ $serial_id \z//xms; |
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314 | |
315 | no strict 'refs'; |
8f40866c |
316 | delete ${$name}{ $serial_id . '::' }; |
7a50b450 |
317 | |
318 | return; |
319 | } |
320 | } |
321 | |
8536d351 |
322 | sub throw_error{ |
323 | my($class, $message, %args) = @_; |
324 | |
fce211ae |
325 | local $Carp::CarpLevel = $Carp::CarpLevel + 1 + ($args{depth} || 0); |
8e64d0fa |
326 | local $Carp::MaxArgNums = 20; # default is 8, usually we use named args which gets messier though |
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327 | |
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328 | if(exists $args{longmess} && !$args{longmess}){ # intentionaly longmess => 0 |
329 | Carp::croak($message); |
330 | } |
331 | else{ |
332 | Carp::confess($message); |
333 | } |
334 | } |
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335 | |
336 | 1; |
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337 | __END__ |
338 | |
339 | =head1 NAME |
340 | |
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341 | Mouse::Meta::Module - The base class for Mouse::Meta::Class and Mouse::Meta::Role |
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342 | |
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343 | =head1 VERSION |
344 | |
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345 | This document describes Mouse version 0.50_01 |
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346 | |
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347 | =head1 SEE ALSO |
348 | |
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349 | L<Class::MOP::Class> |
350 | |
351 | L<Class::MOP::Module> |
352 | |
353 | L<Class::MOP::Package> |
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354 | |
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355 | =cut |
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356 | |