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1 | package Mouse::Meta::Module; |
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2 | use Mouse::Util qw/:meta get_code_package load_class not_supported/; # enables strict and warnings |
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3 | |
6d28c5cf |
4 | use Carp (); |
ad022aac |
5 | use Scalar::Util qw/blessed weaken/; |
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6 | |
fe1221ad |
7 | my %METAS; |
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8 | |
deb9a0f3 |
9 | sub _metaclass_cache { # DEPRECATED |
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10 | my($class, $name) = @_; |
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11 | return $METAS{$name}; |
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12 | } |
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13 | |
739525d0 |
14 | sub initialize { |
15 | my($class, $package_name, @args) = @_; |
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16 | |
739525d0 |
17 | ($package_name && !ref($package_name)) |
18 | || $class->throw_error("You must pass a package name and it cannot be blessed"); |
8536d351 |
19 | |
fe1221ad |
20 | return $METAS{$package_name} |
739525d0 |
21 | ||= $class->_construct_meta(package => $package_name, @args); |
22 | } |
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23 | |
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24 | sub class_of{ |
25 | my($class_or_instance) = @_; |
26 | return undef unless defined $class_or_instance; |
23274b88 |
27 | return $METAS{ ref($class_or_instance) || $class_or_instance }; |
8536d351 |
28 | } |
29 | |
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30 | # Means of accessing all the metaclasses that have |
31 | # been initialized thus far |
fe1221ad |
32 | #sub get_all_metaclasses { %METAS } |
33 | sub get_all_metaclass_instances { values %METAS } |
34 | sub get_all_metaclass_names { keys %METAS } |
35 | sub get_metaclass_by_name { $METAS{$_[0]} } |
36 | #sub store_metaclass_by_name { $METAS{$_[0]} = $_[1] } |
37 | #sub weaken_metaclass { weaken($METAS{$_[0]}) } |
38 | #sub does_metaclass_exist { defined $METAS{$_[0]} } |
39 | #sub remove_metaclass_by_name { delete $METAS{$_[0]} } |
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40 | |
41 | |
43165725 |
42 | sub name; |
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43 | |
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44 | # The followings are Class::MOP specific methods |
45 | |
46 | #sub version { no strict 'refs'; ${shift->name.'::VERSION'} } |
47 | #sub authority { no strict 'refs'; ${shift->name.'::AUTHORITY'} } |
48 | #sub identifier { |
49 | # my $self = shift; |
50 | # return join '-' => ( |
51 | # $self->name, |
52 | # ($self->version || ()), |
53 | # ($self->authority || ()), |
54 | # ); |
55 | #} |
23264b5b |
56 | |
8536d351 |
57 | # add_attribute is an abstract method |
58 | |
deb9a0f3 |
59 | sub get_attribute_map { # DEPRECATED |
3a683350 |
60 | Carp::cluck('get_attribute_map() has been deprecated'); |
61 | return $_[0]->{attributes}; |
62 | } |
63 | |
8536d351 |
64 | sub has_attribute { exists $_[0]->{attributes}->{$_[1]} } |
65 | sub get_attribute { $_[0]->{attributes}->{$_[1]} } |
66 | sub get_attribute_list{ keys %{$_[0]->{attributes}} } |
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67 | sub remove_attribute { delete $_[0]->{attributes}->{$_[1]} } |
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68 | |
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69 | sub namespace{ |
70 | my $name = $_[0]->{package}; |
71 | no strict 'refs'; |
72 | return \%{ $name . '::' }; |
73 | } |
74 | |
75 | sub add_method { |
76 | my($self, $name, $code) = @_; |
77 | |
78 | if(!defined $name){ |
1b9e472d |
79 | $self->throw_error('You must pass a defined name'); |
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80 | } |
1b9e472d |
81 | if(!defined $code){ |
82 | $self->throw_error('You must pass a defined code'); |
83 | } |
84 | |
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85 | if(ref($code) ne 'CODE'){ |
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86 | $code = \&{$code}; # coerce |
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87 | } |
88 | |
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89 | $self->{methods}->{$name} = $code; # Moose stores meta object here. |
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90 | |
91 | my $pkg = $self->name; |
92 | no strict 'refs'; |
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93 | no warnings 'redefine', 'once'; |
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94 | *{ $pkg . '::' . $name } = $code; |
95 | } |
96 | |
01afd8ff |
97 | # XXX: for backward compatibility |
98 | my %foreign = map{ $_ => undef } qw( |
99 | Mouse Mouse::Role Mouse::Util Mouse::Util::TypeConstraints |
100 | Carp Scalar::Util |
101 | ); |
102 | sub _code_is_mine{ |
103 | my($self, $code) = @_; |
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104 | |
01afd8ff |
105 | my $package = get_code_package($code); |
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106 | |
01afd8ff |
107 | return !exists $foreign{$package}; |
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108 | } |
109 | |
110 | sub has_method { |
111 | my($self, $method_name) = @_; |
112 | |
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113 | defined($method_name) |
114 | or $self->throw_error('You must define a method name'); |
115 | |
2d2e77f9 |
116 | return 1 if $self->{methods}{$method_name}; |
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117 | |
2d2e77f9 |
118 | my $code = do{ |
119 | no strict 'refs'; |
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120 | no warnings 'once'; |
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121 | *{ $self->{package} . '::' . $method_name }{CODE}; |
122 | }; |
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123 | |
124 | return $code && $self->_code_is_mine($code); |
125 | } |
126 | |
71e7b544 |
127 | sub get_method_body{ |
128 | my($self, $method_name) = @_; |
129 | |
130 | defined($method_name) |
131 | or $self->throw_error('You must define a method name'); |
132 | |
133 | return $self->{methods}{$method_name} ||= do{ |
c6e5eee1 |
134 | my $code = do{ |
135 | no strict 'refs'; |
136 | no warnings 'once'; |
137 | *{$self->{package} . '::' . $method_name}{CODE}; |
138 | }; |
71e7b544 |
139 | |
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140 | ($code && $self->_code_is_mine($code)) ? $code : undef; |
71e7b544 |
141 | }; |
142 | } |
143 | |
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144 | sub get_method{ |
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145 | my($self, $method_name) = @_; |
146 | |
147 | if($self->has_method($method_name)){ |
148 | my $method_metaclass = $self->method_metaclass; |
149 | load_class($method_metaclass); |
150 | |
9010458d |
151 | return $method_metaclass->wrap( |
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152 | body => $self->get_method_body($method_name), |
9010458d |
153 | name => $method_name, |
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154 | package => $self->name, |
9010458d |
155 | associated_metaclass => $self, |
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156 | ); |
157 | } |
158 | |
159 | return undef; |
8536d351 |
160 | } |
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161 | |
8e64d0fa |
162 | sub get_method_list { |
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163 | my($self) = @_; |
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164 | |
165 | return grep { $self->has_method($_) } keys %{ $self->namespace }; |
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166 | } |
167 | |
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168 | { |
169 | my $ANON_SERIAL = 0; |
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170 | |
171 | my %IMMORTALS; |
172 | |
173 | sub create { |
7eb3a8d5 |
174 | my($self, $package_name, %options) = @_; |
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175 | |
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176 | my $class = ref($self) || $self; |
177 | $self->throw_error('You must pass a package name') if @_ < 2; |
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178 | |
8f40866c |
179 | my $superclasses; |
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180 | if(exists $options{superclasses}){ |
7eb3a8d5 |
181 | if($self->isa('Mouse::Meta::Role')){ |
7a50b450 |
182 | delete $options{superclasses}; |
183 | } |
8f40866c |
184 | else{ |
185 | $superclasses = delete $options{superclasses}; |
186 | (ref $superclasses eq 'ARRAY') |
7eb3a8d5 |
187 | || $self->throw_error("You must pass an ARRAY ref of superclasses"); |
8f40866c |
188 | } |
7a50b450 |
189 | } |
190 | |
8f40866c |
191 | my $attributes = delete $options{attributes}; |
192 | if(defined $attributes){ |
193 | (ref $attributes eq 'ARRAY' || ref $attributes eq 'HASH') |
7eb3a8d5 |
194 | || $self->throw_error("You must pass an ARRAY ref of attributes"); |
8f40866c |
195 | } |
196 | my $methods = delete $options{methods}; |
197 | if(defined $methods){ |
198 | (ref $methods eq 'HASH') |
7eb3a8d5 |
199 | || $self->throw_error("You must pass a HASH ref of methods"); |
8f40866c |
200 | } |
201 | my $roles = delete $options{roles}; |
202 | if(defined $roles){ |
203 | (ref $roles eq 'ARRAY') |
7eb3a8d5 |
204 | || $self->throw_error("You must pass an ARRAY ref of roles"); |
8f40866c |
205 | } |
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206 | my $mortal; |
207 | my $cache_key; |
208 | |
209 | if(!defined $package_name){ # anonymous |
210 | $mortal = !$options{cache}; |
211 | |
212 | # anonymous but immortal |
213 | if(!$mortal){ |
8e64d0fa |
214 | # something like Super::Class|Super::Class::2=Role|Role::1 |
215 | $cache_key = join '=' => ( |
8f40866c |
216 | join('|', @{$superclasses || []}), |
217 | join('|', sort @{$roles || []}), |
7a50b450 |
218 | ); |
219 | return $IMMORTALS{$cache_key} if exists $IMMORTALS{$cache_key}; |
220 | } |
8f40866c |
221 | $options{anon_serial_id} = ++$ANON_SERIAL; |
222 | $package_name = $class . '::__ANON__::' . $ANON_SERIAL; |
7a50b450 |
223 | } |
224 | |
225 | # instantiate a module |
226 | { |
227 | no strict 'refs'; |
228 | ${ $package_name . '::VERSION' } = delete $options{version} if exists $options{version}; |
229 | ${ $package_name . '::AUTHORITY' } = delete $options{authority} if exists $options{authority}; |
230 | } |
231 | |
7eb3a8d5 |
232 | my $meta = $self->initialize( $package_name, %options); |
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233 | |
fe1221ad |
234 | weaken $METAS{$package_name} |
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235 | if $mortal; |
236 | |
7eb3a8d5 |
237 | $meta->add_method(meta => sub{ |
238 | $self->initialize(ref($_[0]) || $_[0]); |
7a50b450 |
239 | }); |
240 | |
8f40866c |
241 | $meta->superclasses(@{$superclasses}) |
242 | if defined $superclasses; |
7a50b450 |
243 | |
244 | # NOTE: |
245 | # process attributes first, so that they can |
246 | # install accessors, but locally defined methods |
247 | # can then overwrite them. It is maybe a little odd, but |
248 | # I think this should be the order of things. |
249 | if (defined $attributes) { |
250 | if(ref($attributes) eq 'ARRAY'){ |
8f40866c |
251 | # array of Mouse::Meta::Attribute |
7a50b450 |
252 | foreach my $attr (@{$attributes}) { |
8f40866c |
253 | $meta->add_attribute($attr); |
7a50b450 |
254 | } |
255 | } |
256 | else{ |
8f40866c |
257 | # hash map of name and attribute spec pairs |
7a50b450 |
258 | while(my($name, $attr) = each %{$attributes}){ |
259 | $meta->add_attribute($name => $attr); |
260 | } |
261 | } |
262 | } |
8f40866c |
263 | if (defined $methods) { |
264 | while(my($method_name, $method_body) = each %{$methods}){ |
265 | $meta->add_method($method_name, $method_body); |
7a50b450 |
266 | } |
267 | } |
8f40866c |
268 | if (defined $roles){ |
269 | Mouse::Util::apply_all_roles($package_name, @{$roles}); |
7a50b450 |
270 | } |
271 | |
8f40866c |
272 | if($cache_key){ |
7a50b450 |
273 | $IMMORTALS{$cache_key} = $meta; |
274 | } |
275 | |
276 | return $meta; |
277 | } |
278 | |
279 | sub DESTROY{ |
280 | my($self) = @_; |
281 | |
282 | my $serial_id = $self->{anon_serial_id}; |
283 | |
284 | return if !$serial_id; |
285 | |
e75f21db |
286 | # @ISA is a magical variable, so we clear it manually. |
287 | @{$self->{superclasses}} = () if exists $self->{superclasses}; |
288 | |
289 | # Then, clear the symbol table hash |
290 | %{$self->namespace} = (); |
7a50b450 |
291 | |
8f40866c |
292 | my $name = $self->name; |
293 | delete $METAS{$name}; |
294 | |
e75f21db |
295 | $name =~ s/ $serial_id \z//xms; |
7a50b450 |
296 | |
297 | no strict 'refs'; |
8f40866c |
298 | delete ${$name}{ $serial_id . '::' }; |
7a50b450 |
299 | |
300 | return; |
301 | } |
302 | } |
303 | |
8536d351 |
304 | sub throw_error{ |
305 | my($class, $message, %args) = @_; |
306 | |
fce211ae |
307 | local $Carp::CarpLevel = $Carp::CarpLevel + 1 + ($args{depth} || 0); |
8e64d0fa |
308 | local $Carp::MaxArgNums = 20; # default is 8, usually we use named args which gets messier though |
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309 | |
8536d351 |
310 | if(exists $args{longmess} && !$args{longmess}){ # intentionaly longmess => 0 |
311 | Carp::croak($message); |
312 | } |
313 | else{ |
314 | Carp::confess($message); |
315 | } |
316 | } |
3a63a2e7 |
317 | |
318 | 1; |
319 | |
320 | __END__ |
321 | |
322 | =head1 NAME |
323 | |
1820fffe |
324 | Mouse::Meta::Module - The base class for Mouse::Meta::Class and Mouse::Meta::Role |
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325 | |
a25ca8d6 |
326 | =head1 VERSION |
327 | |
034587d8 |
328 | This document describes Mouse version 0.40 |
a25ca8d6 |
329 | |
b995be6a |
330 | =head1 SEE ALSO |
331 | |
31c5194b |
332 | L<Class::MOP::Class> |
333 | |
334 | L<Class::MOP::Module> |
335 | |
336 | L<Class::MOP::Package> |
b995be6a |
337 | |
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338 | =cut |
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339 | |