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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 | |
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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($self, $name) = @_; |
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19 | Carp::cluck('_metaclass_cache() has been deprecated. Use Mouse::Util::get_metaclass_by_name() instead'); |
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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 | |
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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 |
542f20ad |
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 | # add_attribute is an abstract method |
67 | |
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68 | sub get_attribute_map { # DEPRECATED |
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69 | Carp::cluck('get_attribute_map() has been deprecated. Use get_attribute_list() and get_attribute() instead'); |
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70 | return $_[0]->{attributes}; |
71 | } |
72 | |
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73 | sub has_attribute { exists $_[0]->{attributes}->{$_[1]} } |
74 | sub get_attribute { $_[0]->{attributes}->{$_[1]} } |
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75 | sub remove_attribute { delete $_[0]->{attributes}->{$_[1]} } |
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76 | |
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77 | sub get_attribute_list{ keys %{$_[0]->{attributes}} } |
78 | |
01afd8ff |
79 | # XXX: for backward compatibility |
80 | my %foreign = map{ $_ => undef } qw( |
81 | Mouse Mouse::Role Mouse::Util Mouse::Util::TypeConstraints |
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82 | Carp Scalar::Util List::Util |
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83 | ); |
84 | sub _code_is_mine{ |
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85 | # my($self, $code) = @_; |
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86 | |
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87 | return !exists $foreign{ get_code_package($_[1]) }; |
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88 | } |
89 | |
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90 | sub add_method; |
91 | |
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92 | sub has_method { |
93 | my($self, $method_name) = @_; |
94 | |
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95 | defined($method_name) |
96 | or $self->throw_error('You must define a method name'); |
97 | |
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98 | return defined($self->{methods}{$method_name}) || do{ |
99 | my $code = get_code_ref($self->{package}, $method_name); |
100 | $code && $self->_code_is_mine($code); |
101 | }; |
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102 | } |
103 | |
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104 | sub get_method_body { |
71e7b544 |
105 | my($self, $method_name) = @_; |
106 | |
107 | defined($method_name) |
108 | or $self->throw_error('You must define a method name'); |
109 | |
110 | return $self->{methods}{$method_name} ||= do{ |
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111 | my $code = get_code_ref($self->{package}, $method_name); |
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112 | $code && $self->_code_is_mine($code) ? $code : undef; |
71e7b544 |
113 | }; |
114 | } |
115 | |
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116 | sub get_method{ |
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117 | my($self, $method_name) = @_; |
118 | |
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119 | if(my $code = $self->get_method_body($method_name)){ |
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120 | return Mouse::Util::load_class($self->method_metaclass)->wrap( |
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121 | body => $code, |
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122 | name => $method_name, |
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123 | package => $self->name, |
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124 | associated_metaclass => $self, |
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125 | ); |
126 | } |
127 | |
128 | return undef; |
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129 | } |
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130 | |
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131 | sub get_method_list { |
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132 | my($self) = @_; |
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133 | |
134 | return grep { $self->has_method($_) } keys %{ $self->namespace }; |
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135 | } |
136 | |
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137 | sub _collect_methods { # Mouse specific |
138 | my($meta, @args) = @_; |
139 | |
140 | my @methods; |
141 | foreach my $arg(@args){ |
142 | if(my $type = ref $arg){ |
143 | if($type eq 'Regexp'){ |
144 | push @methods, grep { $_ =~ $arg } $meta->get_all_method_names; |
145 | } |
146 | elsif($type eq 'ARRAY'){ |
147 | push @methods, @{$arg}; |
148 | } |
149 | else{ |
150 | my $subname = ( caller(1) )[3]; |
151 | $meta->throw_error( |
152 | sprintf( |
153 | 'Methods passed to %s must be provided as a list, ArrayRef or regular expression, not %s', |
154 | $subname, |
155 | $type, |
156 | ) |
157 | ); |
158 | } |
159 | } |
160 | else{ |
161 | push @methods, $arg; |
162 | } |
163 | } |
164 | return @methods; |
165 | } |
166 | |
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167 | my $ANON_SERIAL = 0; # anonymous class/role id |
168 | my %IMMORTALS; # immortal anonymous classes |
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169 | |
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170 | sub create { |
171 | my($self, $package_name, %options) = @_; |
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172 | |
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173 | my $class = ref($self) || $self; |
174 | $self->throw_error('You must pass a package name') if @_ < 2; |
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175 | |
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176 | my $superclasses; |
177 | if(exists $options{superclasses}){ |
178 | if(Mouse::Util::is_a_metarole($self)){ |
179 | delete $options{superclasses}; |
8f40866c |
180 | } |
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181 | else{ |
182 | $superclasses = delete $options{superclasses}; |
183 | (ref $superclasses eq 'ARRAY') |
184 | || $self->throw_error("You must pass an ARRAY ref of superclasses"); |
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185 | } |
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186 | } |
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187 | |
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188 | my $attributes = delete $options{attributes}; |
189 | if(defined $attributes){ |
190 | (ref $attributes eq 'ARRAY' || ref $attributes eq 'HASH') |
191 | || $self->throw_error("You must pass an ARRAY ref of attributes"); |
192 | } |
193 | my $methods = delete $options{methods}; |
194 | if(defined $methods){ |
195 | (ref $methods eq 'HASH') |
196 | || $self->throw_error("You must pass a HASH ref of methods"); |
197 | } |
198 | my $roles = delete $options{roles}; |
199 | if(defined $roles){ |
200 | (ref $roles eq 'ARRAY') |
201 | || $self->throw_error("You must pass an ARRAY ref of roles"); |
202 | } |
203 | my $mortal; |
204 | my $cache_key; |
205 | |
206 | if(!defined $package_name){ # anonymous |
207 | $mortal = !$options{cache}; |
208 | |
209 | # anonymous but immortal |
210 | if(!$mortal){ |
211 | # something like Super::Class|Super::Class::2=Role|Role::1 |
212 | $cache_key = join '=' => ( |
213 | join('|', @{$superclasses || []}), |
214 | join('|', sort @{$roles || []}), |
215 | ); |
216 | return $IMMORTALS{$cache_key} if exists $IMMORTALS{$cache_key}; |
7a50b450 |
217 | } |
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218 | $options{anon_serial_id} = ++$ANON_SERIAL; |
219 | $package_name = $class . '::__ANON__::' . $ANON_SERIAL; |
220 | } |
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221 | |
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222 | # instantiate a module |
223 | { |
224 | no strict 'refs'; |
225 | ${ $package_name . '::VERSION' } = delete $options{version} if exists $options{version}; |
226 | ${ $package_name . '::AUTHORITY' } = delete $options{authority} if exists $options{authority}; |
227 | } |
228 | |
229 | my $meta = $self->initialize( $package_name, %options); |
230 | |
231 | Scalar::Util::weaken $METAS{$package_name} |
232 | if $mortal; |
233 | |
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234 | $meta->add_method(meta => sub { |
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235 | $self->initialize(ref($_[0]) || $_[0]); |
236 | }); |
237 | |
238 | $meta->superclasses(@{$superclasses}) |
239 | if defined $superclasses; |
240 | |
241 | # NOTE: |
242 | # process attributes first, so that they can |
243 | # install accessors, but locally defined methods |
244 | # can then overwrite them. It is maybe a little odd, but |
245 | # I think this should be the order of things. |
246 | if (defined $attributes) { |
247 | if(ref($attributes) eq 'ARRAY'){ |
248 | # array of Mouse::Meta::Attribute |
249 | foreach my $attr (@{$attributes}) { |
250 | $meta->add_attribute($attr); |
7a50b450 |
251 | } |
252 | } |
72dc2c9d |
253 | else{ |
254 | # hash map of name and attribute spec pairs |
255 | while(my($name, $attr) = each %{$attributes}){ |
256 | $meta->add_attribute($name => $attr); |
7a50b450 |
257 | } |
258 | } |
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259 | } |
260 | if (defined $methods) { |
261 | while(my($method_name, $method_body) = each %{$methods}){ |
262 | $meta->add_method($method_name, $method_body); |
7a50b450 |
263 | } |
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264 | } |
265 | if (defined $roles){ |
266 | Mouse::Util::apply_all_roles($package_name, @{$roles}); |
267 | } |
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268 | |
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269 | if($cache_key){ |
270 | $IMMORTALS{$cache_key} = $meta; |
7a50b450 |
271 | } |
272 | |
72dc2c9d |
273 | return $meta; |
274 | } |
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275 | |
72dc2c9d |
276 | sub DESTROY{ |
277 | my($self) = @_; |
39a8df63 |
278 | |
72dc2c9d |
279 | return if $Mouse::Util::in_global_destruction; |
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280 | |
72dc2c9d |
281 | my $serial_id = $self->{anon_serial_id}; |
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282 | |
72dc2c9d |
283 | return if !$serial_id; |
284 | # mortal anonymous class |
e75f21db |
285 | |
20a12328 |
286 | # XXX: cleaning stash with threads causes panic/SEGV. |
287 | if(exists $INC{'threads.pm'}) { |
288 | # (caller)[2] indicates the caller's line number, |
289 | # which is zero when the current thread is joining. |
290 | return if( (caller)[2] == 0); |
291 | } |
292 | |
72dc2c9d |
293 | # @ISA is a magical variable, so we clear it manually. |
294 | @{$self->{superclasses}} = () if exists $self->{superclasses}; |
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295 | |
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296 | # Then, clear the symbol table hash |
297 | %{$self->namespace} = (); |
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298 | |
72dc2c9d |
299 | my $name = $self->name; |
300 | delete $METAS{$name}; |
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301 | |
72dc2c9d |
302 | $name =~ s/ $serial_id \z//xms; |
72dc2c9d |
303 | no strict 'refs'; |
304 | delete ${$name}{ $serial_id . '::' }; |
305 | |
306 | return; |
7a50b450 |
307 | } |
308 | |
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309 | sub throw_error{ |
230dd14a |
310 | my($self, $message, %args) = @_; |
8536d351 |
311 | |
fce211ae |
312 | local $Carp::CarpLevel = $Carp::CarpLevel + 1 + ($args{depth} || 0); |
8e64d0fa |
313 | local $Carp::MaxArgNums = 20; # default is 8, usually we use named args which gets messier though |
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314 | |
8536d351 |
315 | if(exists $args{longmess} && !$args{longmess}){ # intentionaly longmess => 0 |
316 | Carp::croak($message); |
317 | } |
318 | else{ |
319 | Carp::confess($message); |
320 | } |
321 | } |
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322 | |
323 | 1; |
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324 | __END__ |
325 | |
326 | =head1 NAME |
327 | |
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328 | Mouse::Meta::Module - The base class for Mouse::Meta::Class and Mouse::Meta::Role |
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329 | |
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330 | =head1 VERSION |
331 | |
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332 | This document describes Mouse version 0.55 |
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333 | |
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334 | =head1 SEE ALSO |
335 | |
31c5194b |
336 | L<Class::MOP::Class> |
337 | |
338 | L<Class::MOP::Module> |
339 | |
340 | L<Class::MOP::Package> |
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341 | |
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342 | =cut |
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343 | |