Commit | Line | Data |
c3398f5b |
1 | #!/usr/bin/env perl |
306290e8 |
2 | package Mouse::Meta::Class; |
c3398f5b |
3 | use strict; |
4 | use warnings; |
5 | |
fc1d8369 |
6 | use Mouse::Meta::Method::Constructor; |
bbf64e76 |
7 | use Mouse::Meta::Method::Destructor; |
8fcbe7fb |
8 | use Mouse::Util qw/get_linear_isa blessed/; |
7a59f4e8 |
9 | use Carp 'confess'; |
72b88a88 |
10 | |
c3398f5b |
11 | do { |
12 | my %METACLASS_CACHE; |
72b88a88 |
13 | |
14 | # because Mouse doesn't introspect existing classes, we're forced to |
15 | # only pay attention to other Mouse classes |
16 | sub _metaclass_cache { |
17 | my $class = shift; |
18 | my $name = shift; |
19 | return $METACLASS_CACHE{$name}; |
20 | } |
21 | |
c3398f5b |
22 | sub initialize { |
23 | my $class = shift; |
24 | my $name = shift; |
25 | $METACLASS_CACHE{$name} = $class->new(name => $name) |
26 | if !exists($METACLASS_CACHE{$name}); |
27 | return $METACLASS_CACHE{$name}; |
28 | } |
29 | }; |
30 | |
31 | sub new { |
32 | my $class = shift; |
6cbacbf6 |
33 | my %args = @_; |
c3398f5b |
34 | |
35 | $args{attributes} = {}; |
36 | $args{superclasses} = do { |
37 | no strict 'refs'; |
38 | \@{ $args{name} . '::ISA' }; |
39 | }; |
40 | |
41 | bless \%args, $class; |
42 | } |
43 | |
44 | sub name { $_[0]->{name} } |
45 | |
46 | sub superclasses { |
47 | my $self = shift; |
48 | |
49 | if (@_) { |
50 | Mouse::load_class($_) for @_; |
51 | @{ $self->{superclasses} } = @_; |
52 | } |
53 | |
54 | @{ $self->{superclasses} }; |
55 | } |
56 | |
d16fe7d7 |
57 | sub add_method { |
58 | my $self = shift; |
59 | my $name = shift; |
60 | my $code = shift; |
61 | |
62 | my $pkg = $self->name; |
63 | |
64 | no strict 'refs'; |
65 | *{ $pkg . '::' . $name } = $code; |
66 | } |
67 | |
2e92bb89 |
68 | # copied from Class::Inspector |
69 | sub get_method_list { |
70 | my $self = shift; |
71 | my $name = $self->name; |
72 | |
73 | no strict 'refs'; |
74 | # Get all the CODE symbol table entries |
75 | my @functions = grep !/^meta$/, |
76 | grep { /\A[^\W\d]\w*\z/o } |
77 | grep { defined &{"${name}::$_"} } |
78 | keys %{"${name}::"}; |
79 | wantarray ? @functions : \@functions; |
80 | } |
81 | |
c3398f5b |
82 | sub add_attribute { |
83 | my $self = shift; |
84 | my $attr = shift; |
85 | |
86 | $self->{'attributes'}{$attr->name} = $attr; |
87 | } |
88 | |
72b88a88 |
89 | sub compute_all_applicable_attributes { |
90 | my $self = shift; |
91 | my (@attr, %seen); |
92 | |
93 | for my $class ($self->linearized_isa) { |
94 | my $meta = $self->_metaclass_cache($class) |
95 | or next; |
96 | |
97 | for my $name (keys %{ $meta->get_attribute_map }) { |
98 | next if $seen{$name}++; |
99 | push @attr, $meta->get_attribute($name); |
100 | } |
101 | } |
102 | |
103 | return @attr; |
104 | } |
105 | |
c3398f5b |
106 | sub get_attribute_map { $_[0]->{attributes} } |
66eea168 |
107 | sub has_attribute { exists $_[0]->{attributes}->{$_[1]} } |
c3398f5b |
108 | sub get_attribute { $_[0]->{attributes}->{$_[1]} } |
109 | |
00ca1c62 |
110 | sub linearized_isa { @{ get_linear_isa($_[0]->name) } } |
c3398f5b |
111 | |
7a59f4e8 |
112 | sub clone_object { |
113 | my $class = shift; |
114 | my $instance = shift; |
115 | |
116 | (blessed($instance) && $instance->isa($class->name)) |
1a0f0802 |
117 | || confess "You must pass an instance of the metaclass (" . $class->name . "), not ($instance)"; |
7a59f4e8 |
118 | |
119 | $class->clone_instance($instance, @_); |
120 | } |
121 | |
122 | sub clone_instance { |
123 | my ($class, $instance, %params) = @_; |
124 | |
125 | (blessed($instance)) |
e42bee44 |
126 | || confess "You can only clone instances, ($instance) is not a blessed instance"; |
7a59f4e8 |
127 | |
128 | my $clone = bless { %$instance }, ref $instance; |
129 | |
130 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
131 | if ( defined( my $init_arg = $attr->init_arg ) ) { |
132 | if (exists $params{$init_arg}) { |
133 | $clone->{ $attr->name } = $params{$init_arg}; |
134 | } |
135 | } |
136 | } |
137 | |
138 | return $clone; |
139 | |
140 | } |
141 | |
fc1d8369 |
142 | sub make_immutable { |
143 | my $self = shift; |
144 | my $name = $self->name; |
145 | $self->{is_immutable}++; |
146 | no strict 'refs'; |
bbf64e76 |
147 | *{"$name\::new"} = Mouse::Meta::Method::Constructor->generate_constructor_method_inline( $self ); |
148 | *{"$name\::DESTROY"} = Mouse::Meta::Method::Destructor->generate_destructor_method_inline( $self ); |
fc1d8369 |
149 | } |
150 | sub make_mutable { |
151 | Carp::croak "Mouse::Meta::Class->make_mutable does not supported by Mouse"; |
152 | } |
153 | sub is_immutable { $_[0]->{is_immutable} } |
84ef660f |
154 | |
155 | sub attribute_metaclass { "Mouse::Meta::Class" } |
7a59f4e8 |
156 | |
50dc6ee5 |
157 | sub add_before_method_modifier { |
158 | my ($self, $name, $code) = @_; |
4e31595c |
159 | require Class::Method::Modifiers; |
50dc6ee5 |
160 | Class::Method::Modifiers::_install_modifier( |
161 | $self->name, |
162 | 'before', |
163 | $name, |
164 | $code, |
165 | ); |
166 | } |
167 | |
168 | sub add_around_method_modifier { |
169 | my ($self, $name, $code) = @_; |
4e31595c |
170 | require Class::Method::Modifiers; |
50dc6ee5 |
171 | Class::Method::Modifiers::_install_modifier( |
172 | $self->name, |
173 | 'around', |
174 | $name, |
175 | $code, |
176 | ); |
177 | } |
178 | |
179 | sub add_after_method_modifier { |
180 | my ($self, $name, $code) = @_; |
4e31595c |
181 | require Class::Method::Modifiers; |
50dc6ee5 |
182 | Class::Method::Modifiers::_install_modifier( |
183 | $self->name, |
184 | 'after', |
185 | $name, |
186 | $code, |
187 | ); |
188 | } |
189 | |
c3398f5b |
190 | 1; |
191 | |
192 | __END__ |
193 | |
194 | =head1 NAME |
195 | |
306290e8 |
196 | Mouse::Meta::Class - hook into the Mouse MOP |
c3398f5b |
197 | |
198 | =head1 METHODS |
199 | |
306290e8 |
200 | =head2 initialize ClassName -> Mouse::Meta::Class |
c3398f5b |
201 | |
306290e8 |
202 | Finds or creates a Mouse::Meta::Class instance for the given ClassName. Only |
203 | one instance should exist for a given class. |
c3398f5b |
204 | |
306290e8 |
205 | =head2 new %args -> Mouse::Meta::Class |
c3398f5b |
206 | |
306290e8 |
207 | Creates a new Mouse::Meta::Class. Don't call this directly. |
c3398f5b |
208 | |
209 | =head2 name -> ClassName |
210 | |
211 | Returns the name of the owner class. |
212 | |
213 | =head2 superclasses -> [ClassName] |
214 | |
215 | Gets (or sets) the list of superclasses of the owner class. |
216 | |
306290e8 |
217 | =head2 add_attribute Mouse::Meta::Attribute |
c3398f5b |
218 | |
306290e8 |
219 | Begins keeping track of the existing L<Mouse::Meta::Attribute> for the owner |
220 | class. |
c3398f5b |
221 | |
72b88a88 |
222 | =head2 compute_all_applicable_attributes -> (Mouse::Meta::Attribute) |
223 | |
224 | Returns the list of all L<Mouse::Meta::Attribute> instances associated with |
225 | this class and its superclasses. |
226 | |
306290e8 |
227 | =head2 get_attribute_map -> { name => Mouse::Meta::Attribute } |
c3398f5b |
228 | |
229 | Returns a mapping of attribute names to their corresponding |
306290e8 |
230 | L<Mouse::Meta::Attribute> objects. |
c3398f5b |
231 | |
66eea168 |
232 | =head2 has_attribute Name -> Boool |
233 | |
234 | Returns whether we have a L<Mouse::Meta::Attribute> with the given name. |
235 | |
306290e8 |
236 | =head2 get_attribute Name -> Mouse::Meta::Attribute | undef |
c3398f5b |
237 | |
306290e8 |
238 | Returns the L<Mouse::Meta::Attribute> with the given name. |
c3398f5b |
239 | |
240 | =head2 linearized_isa -> [ClassNames] |
241 | |
242 | Returns the list of classes in method dispatch order, with duplicates removed. |
243 | |
f7b11a21 |
244 | =head2 clone_object Instance -> Instance |
245 | |
246 | Clones the given C<Instance> which must be an instance governed by this |
247 | metaclass. |
248 | |
249 | =head2 clone_instance Instance, Parameters -> Instance |
250 | |
251 | Clones the given C<Instance> and sets any additional parameters. |
252 | |
c3398f5b |
253 | =cut |
254 | |