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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 | 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 | |
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14 | sub initialize { |
15 | my($class, $package_name, @args) = @_; |
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16 | |
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17 | ($package_name && !ref($package_name)) |
18 | || $class->throw_error("You must pass a package name and it cannot be blessed"); |
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19 | |
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20 | return $METAS{$package_name} |
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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; |
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27 | return $METAS{ ref($class_or_instance) || $class_or_instance }; |
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28 | } |
29 | |
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30 | # Means of accessing all the metaclasses that have |
31 | # been initialized thus far |
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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 | |
43165725 |
41 | sub name; |
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42 | |
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43 | sub namespace; |
44 | |
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45 | # The followings are Class::MOP specific methods |
46 | |
47 | #sub version { no strict 'refs'; ${shift->name.'::VERSION'} } |
48 | #sub authority { no strict 'refs'; ${shift->name.'::AUTHORITY'} } |
49 | #sub identifier { |
50 | # my $self = shift; |
51 | # return join '-' => ( |
52 | # $self->name, |
53 | # ($self->version || ()), |
54 | # ($self->authority || ()), |
55 | # ); |
56 | #} |
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57 | |
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58 | # add_attribute is an abstract method |
59 | |
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60 | sub get_attribute_map { # DEPRECATED |
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61 | Carp::cluck('get_attribute_map() has been deprecated'); |
62 | return $_[0]->{attributes}; |
63 | } |
64 | |
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65 | sub has_attribute { exists $_[0]->{attributes}->{$_[1]} } |
66 | sub get_attribute { $_[0]->{attributes}->{$_[1]} } |
67 | sub get_attribute_list{ keys %{$_[0]->{attributes}} } |
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68 | sub remove_attribute { delete $_[0]->{attributes}->{$_[1]} } |
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69 | |
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70 | # XXX: for backward compatibility |
71 | my %foreign = map{ $_ => undef } qw( |
72 | Mouse Mouse::Role Mouse::Util Mouse::Util::TypeConstraints |
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73 | Carp Scalar::Util List::Util |
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74 | ); |
75 | sub _code_is_mine{ |
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76 | # my($self, $code) = @_; |
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77 | |
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78 | return !exists $foreign{ get_code_package($_[1]) }; |
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79 | } |
80 | |
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81 | sub add_method; |
82 | |
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83 | sub has_method { |
84 | my($self, $method_name) = @_; |
85 | |
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86 | defined($method_name) |
87 | or $self->throw_error('You must define a method name'); |
88 | |
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89 | return defined($self->{methods}{$method_name}) || do{ |
90 | my $code = get_code_ref($self->{package}, $method_name); |
91 | $code && $self->_code_is_mine($code); |
92 | }; |
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93 | } |
94 | |
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95 | sub get_method_body { |
71e7b544 |
96 | my($self, $method_name) = @_; |
97 | |
98 | defined($method_name) |
99 | or $self->throw_error('You must define a method name'); |
100 | |
101 | return $self->{methods}{$method_name} ||= do{ |
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102 | my $code = get_code_ref($self->{package}, $method_name); |
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103 | $code && $self->_code_is_mine($code) ? $code : undef; |
71e7b544 |
104 | }; |
105 | } |
106 | |
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107 | sub get_method{ |
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108 | my($self, $method_name) = @_; |
109 | |
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110 | if(my $code = $self->get_method_body($method_name)){ |
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111 | my $method_metaclass = $self->method_metaclass; |
112 | load_class($method_metaclass); |
113 | |
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114 | return $method_metaclass->wrap( |
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115 | body => $code, |
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116 | name => $method_name, |
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117 | package => $self->name, |
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118 | associated_metaclass => $self, |
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119 | ); |
120 | } |
121 | |
122 | return undef; |
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123 | } |
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124 | |
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125 | sub get_method_list { |
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126 | my($self) = @_; |
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127 | |
128 | return grep { $self->has_method($_) } keys %{ $self->namespace }; |
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129 | } |
130 | |
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131 | { |
132 | my $ANON_SERIAL = 0; |
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133 | |
134 | my %IMMORTALS; |
135 | |
136 | sub create { |
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137 | my($self, $package_name, %options) = @_; |
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138 | |
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139 | my $class = ref($self) || $self; |
140 | $self->throw_error('You must pass a package name') if @_ < 2; |
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141 | |
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142 | my $superclasses; |
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143 | if(exists $options{superclasses}){ |
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144 | if(Mouse::Util::is_a_metarole($self)){ |
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145 | delete $options{superclasses}; |
146 | } |
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147 | else{ |
148 | $superclasses = delete $options{superclasses}; |
149 | (ref $superclasses eq 'ARRAY') |
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150 | || $self->throw_error("You must pass an ARRAY ref of superclasses"); |
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151 | } |
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152 | } |
153 | |
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154 | my $attributes = delete $options{attributes}; |
155 | if(defined $attributes){ |
156 | (ref $attributes eq 'ARRAY' || ref $attributes eq 'HASH') |
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157 | || $self->throw_error("You must pass an ARRAY ref of attributes"); |
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158 | } |
159 | my $methods = delete $options{methods}; |
160 | if(defined $methods){ |
161 | (ref $methods eq 'HASH') |
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162 | || $self->throw_error("You must pass a HASH ref of methods"); |
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163 | } |
164 | my $roles = delete $options{roles}; |
165 | if(defined $roles){ |
166 | (ref $roles eq 'ARRAY') |
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167 | || $self->throw_error("You must pass an ARRAY ref of roles"); |
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168 | } |
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169 | my $mortal; |
170 | my $cache_key; |
171 | |
172 | if(!defined $package_name){ # anonymous |
173 | $mortal = !$options{cache}; |
174 | |
175 | # anonymous but immortal |
176 | if(!$mortal){ |
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177 | # something like Super::Class|Super::Class::2=Role|Role::1 |
178 | $cache_key = join '=' => ( |
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179 | join('|', @{$superclasses || []}), |
180 | join('|', sort @{$roles || []}), |
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181 | ); |
182 | return $IMMORTALS{$cache_key} if exists $IMMORTALS{$cache_key}; |
183 | } |
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184 | $options{anon_serial_id} = ++$ANON_SERIAL; |
185 | $package_name = $class . '::__ANON__::' . $ANON_SERIAL; |
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186 | } |
187 | |
188 | # instantiate a module |
189 | { |
190 | no strict 'refs'; |
191 | ${ $package_name . '::VERSION' } = delete $options{version} if exists $options{version}; |
192 | ${ $package_name . '::AUTHORITY' } = delete $options{authority} if exists $options{authority}; |
193 | } |
194 | |
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195 | my $meta = $self->initialize( $package_name, %options); |
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196 | |
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197 | Scalar::Util::weaken $METAS{$package_name} |
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198 | if $mortal; |
199 | |
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200 | $meta->add_method(meta => sub{ |
201 | $self->initialize(ref($_[0]) || $_[0]); |
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202 | }); |
203 | |
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204 | $meta->superclasses(@{$superclasses}) |
205 | if defined $superclasses; |
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206 | |
207 | # NOTE: |
208 | # process attributes first, so that they can |
209 | # install accessors, but locally defined methods |
210 | # can then overwrite them. It is maybe a little odd, but |
211 | # I think this should be the order of things. |
212 | if (defined $attributes) { |
213 | if(ref($attributes) eq 'ARRAY'){ |
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214 | # array of Mouse::Meta::Attribute |
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215 | foreach my $attr (@{$attributes}) { |
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216 | $meta->add_attribute($attr); |
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217 | } |
218 | } |
219 | else{ |
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220 | # hash map of name and attribute spec pairs |
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221 | while(my($name, $attr) = each %{$attributes}){ |
222 | $meta->add_attribute($name => $attr); |
223 | } |
224 | } |
225 | } |
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226 | if (defined $methods) { |
227 | while(my($method_name, $method_body) = each %{$methods}){ |
228 | $meta->add_method($method_name, $method_body); |
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229 | } |
230 | } |
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231 | if (defined $roles){ |
232 | Mouse::Util::apply_all_roles($package_name, @{$roles}); |
7a50b450 |
233 | } |
234 | |
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235 | if($cache_key){ |
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236 | $IMMORTALS{$cache_key} = $meta; |
237 | } |
238 | |
239 | return $meta; |
240 | } |
241 | |
242 | sub DESTROY{ |
243 | my($self) = @_; |
244 | |
245 | my $serial_id = $self->{anon_serial_id}; |
246 | |
247 | return if !$serial_id; |
248 | |
e75f21db |
249 | # @ISA is a magical variable, so we clear it manually. |
250 | @{$self->{superclasses}} = () if exists $self->{superclasses}; |
251 | |
252 | # Then, clear the symbol table hash |
253 | %{$self->namespace} = (); |
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254 | |
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255 | my $name = $self->name; |
256 | delete $METAS{$name}; |
257 | |
e75f21db |
258 | $name =~ s/ $serial_id \z//xms; |
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259 | |
260 | no strict 'refs'; |
8f40866c |
261 | delete ${$name}{ $serial_id . '::' }; |
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262 | |
263 | return; |
264 | } |
265 | } |
266 | |
8536d351 |
267 | sub throw_error{ |
268 | my($class, $message, %args) = @_; |
269 | |
fce211ae |
270 | local $Carp::CarpLevel = $Carp::CarpLevel + 1 + ($args{depth} || 0); |
8e64d0fa |
271 | local $Carp::MaxArgNums = 20; # default is 8, usually we use named args which gets messier though |
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272 | |
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273 | if(exists $args{longmess} && !$args{longmess}){ # intentionaly longmess => 0 |
274 | Carp::croak($message); |
275 | } |
276 | else{ |
277 | Carp::confess($message); |
278 | } |
279 | } |
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280 | |
281 | 1; |
282 | |
283 | __END__ |
284 | |
285 | =head1 NAME |
286 | |
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287 | Mouse::Meta::Module - The base class for Mouse::Meta::Class and Mouse::Meta::Role |
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288 | |
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289 | =head1 VERSION |
290 | |
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291 | This document describes Mouse version 0.40_05 |
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292 | |
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293 | =head1 SEE ALSO |
294 | |
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295 | L<Class::MOP::Class> |
296 | |
297 | L<Class::MOP::Module> |
298 | |
299 | L<Class::MOP::Package> |
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300 | |
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301 | =cut |
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302 | |