Commit | Line | Data |
c0e30cf5 |
1 | |
2 | package Moose::Meta::Class; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
648e79ae |
7 | use Class::MOP; |
8 | |
6ba6d68c |
9 | use Carp 'confess'; |
54b1cdf0 |
10 | use Scalar::Util 'weaken', 'blessed', 'reftype'; |
a15dff8d |
11 | |
4c4fbe56 |
12 | our $VERSION = '0.05'; |
bc1e29b5 |
13 | |
c0e30cf5 |
14 | use base 'Class::MOP::Class'; |
15 | |
598340d5 |
16 | __PACKAGE__->meta->add_attribute('roles' => ( |
ef333f17 |
17 | reader => 'roles', |
18 | default => sub { [] } |
19 | )); |
20 | |
590868a3 |
21 | sub initialize { |
22 | my $class = shift; |
23 | my $pkg = shift; |
24 | $class->SUPER::initialize($pkg, |
25 | ':attribute_metaclass' => 'Moose::Meta::Attribute', |
ddd0ec20 |
26 | ':instance_metaclass' => 'Moose::Meta::Instance', |
590868a3 |
27 | @_); |
28 | } |
29 | |
ef333f17 |
30 | sub add_role { |
31 | my ($self, $role) = @_; |
32 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
33 | || confess "Roles must be instances of Moose::Meta::Role"; |
34 | push @{$self->roles} => $role; |
35 | } |
36 | |
37 | sub does_role { |
38 | my ($self, $role_name) = @_; |
39 | (defined $role_name) |
40 | || confess "You must supply a role name to look for"; |
41 | foreach my $role (@{$self->roles}) { |
bdabd620 |
42 | return 1 if $role->does_role($role_name); |
ef333f17 |
43 | } |
44 | return 0; |
45 | } |
46 | |
8c9d74e7 |
47 | sub new_object { |
48 | my ($class, %params) = @_; |
49 | my $self = $class->SUPER::new_object(%params); |
50 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
5faf11bb |
51 | next unless $params{$attr->init_arg} && $attr->can('has_trigger') && $attr->has_trigger; |
52 | $attr->trigger->($self, $params{$attr->init_arg}, $attr); |
8c9d74e7 |
53 | } |
54 | return $self; |
55 | } |
56 | |
a15dff8d |
57 | sub construct_instance { |
58 | my ($class, %params) = @_; |
ddd0ec20 |
59 | my $meta_instance = $class->get_meta_instance; |
575db57d |
60 | # FIXME: |
61 | # the code below is almost certainly incorrect |
62 | # but this is foreign inheritence, so we might |
63 | # have to kludge it in the end. |
ddd0ec20 |
64 | my $instance = $params{'__INSTANCE__'} || $meta_instance->create_instance(); |
a15dff8d |
65 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
ddd0ec20 |
66 | $attr->initialize_instance_slot($meta_instance, $instance, \%params) |
a15dff8d |
67 | } |
68 | return $instance; |
69 | } |
70 | |
a7d0cd00 |
71 | sub has_method { |
72 | my ($self, $method_name) = @_; |
73 | (defined $method_name && $method_name) |
74 | || confess "You must define a method name"; |
75 | |
76 | my $sub_name = ($self->name . '::' . $method_name); |
77 | |
78 | no strict 'refs'; |
79 | return 0 if !defined(&{$sub_name}); |
80 | my $method = \&{$sub_name}; |
81 | |
82 | return 1 if blessed($method) && $method->isa('Moose::Meta::Role::Method'); |
83 | return $self->SUPER::has_method($method_name); |
84 | } |
85 | |
78cd1d3b |
86 | sub add_override_method_modifier { |
87 | my ($self, $name, $method, $_super_package) = @_; |
88 | # need this for roles ... |
89 | $_super_package ||= $self->name; |
90 | my $super = $self->find_next_method_by_name($name); |
91 | (defined $super) |
92 | || confess "You cannot override '$name' because it has no super method"; |
05d9eaf6 |
93 | $self->add_method($name => bless sub { |
78cd1d3b |
94 | my @args = @_; |
95 | no strict 'refs'; |
96 | no warnings 'redefine'; |
97 | local *{$_super_package . '::super'} = sub { $super->(@args) }; |
98 | return $method->(@args); |
05d9eaf6 |
99 | } => 'Moose::Meta::Method::Overriden'); |
78cd1d3b |
100 | } |
101 | |
102 | sub add_augment_method_modifier { |
05d9eaf6 |
103 | my ($self, $name, $method) = @_; |
78cd1d3b |
104 | my $super = $self->find_next_method_by_name($name); |
105 | (defined $super) |
05d9eaf6 |
106 | || confess "You cannot augment '$name' because it has no super method"; |
107 | my $_super_package = $super->package_name; |
108 | # BUT!,... if this is an overriden method .... |
109 | if ($super->isa('Moose::Meta::Method::Overriden')) { |
110 | # we need to be sure that we actually |
111 | # find the next method, which is not |
112 | # an 'override' method, the reason is |
113 | # that an 'override' method will not |
114 | # be the one calling inner() |
115 | my $real_super = $self->_find_next_method_by_name_which_is_not_overridden($name); |
116 | $_super_package = $real_super->package_name; |
117 | } |
78cd1d3b |
118 | $self->add_method($name => sub { |
119 | my @args = @_; |
120 | no strict 'refs'; |
121 | no warnings 'redefine'; |
05d9eaf6 |
122 | local *{$_super_package . '::inner'} = sub { $method->(@args) }; |
78cd1d3b |
123 | return $super->(@args); |
124 | }); |
125 | } |
126 | |
05d9eaf6 |
127 | sub _find_next_method_by_name_which_is_not_overridden { |
128 | my ($self, $name) = @_; |
129 | my @methods = $self->find_all_methods_by_name($name); |
130 | foreach my $method (@methods) { |
131 | return $method->{code} |
132 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overriden'); |
133 | } |
134 | return undef; |
135 | } |
136 | |
137 | package Moose::Meta::Method::Overriden; |
138 | |
139 | use strict; |
140 | use warnings; |
141 | |
142 | our $VERSION = '0.01'; |
143 | |
144 | use base 'Class::MOP::Method'; |
145 | |
c0e30cf5 |
146 | 1; |
147 | |
148 | __END__ |
149 | |
150 | =pod |
151 | |
152 | =head1 NAME |
153 | |
e522431d |
154 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
155 | |
c0e30cf5 |
156 | =head1 DESCRIPTION |
157 | |
e522431d |
158 | This is a subclass of L<Class::MOP::Class> with Moose specific |
159 | extensions. |
160 | |
6ba6d68c |
161 | For the most part, the only time you will ever encounter an |
162 | instance of this class is if you are doing some serious deep |
163 | introspection. To really understand this class, you need to refer |
164 | to the L<Class::MOP::Class> documentation. |
165 | |
c0e30cf5 |
166 | =head1 METHODS |
167 | |
168 | =over 4 |
169 | |
590868a3 |
170 | =item B<initialize> |
171 | |
8c9d74e7 |
172 | =item B<new_object> |
173 | |
02a0fb52 |
174 | We override this method to support the C<trigger> attribute option. |
175 | |
a15dff8d |
176 | =item B<construct_instance> |
177 | |
6ba6d68c |
178 | This provides some Moose specific extensions to this method, you |
179 | almost never call this method directly unless you really know what |
180 | you are doing. |
181 | |
182 | This method makes sure to handle the moose weak-ref, type-constraint |
183 | and type coercion features. |
ef1d5f4b |
184 | |
e9ec68d6 |
185 | =item B<has_method ($name)> |
186 | |
187 | This accomidates Moose::Meta::Role::Method instances, which are |
188 | aliased, instead of added, but still need to be counted as valid |
189 | methods. |
190 | |
78cd1d3b |
191 | =item B<add_override_method_modifier ($name, $method)> |
192 | |
02a0fb52 |
193 | This will create an C<override> method modifier for you, and install |
194 | it in the package. |
195 | |
78cd1d3b |
196 | =item B<add_augment_method_modifier ($name, $method)> |
197 | |
02a0fb52 |
198 | This will create an C<augment> method modifier for you, and install |
199 | it in the package. |
200 | |
ef333f17 |
201 | =item B<roles> |
202 | |
02a0fb52 |
203 | This will return an array of C<Moose::Meta::Role> instances which are |
204 | attached to this class. |
205 | |
ef333f17 |
206 | =item B<add_role ($role)> |
207 | |
02a0fb52 |
208 | This takes an instance of C<Moose::Meta::Role> in C<$role>, and adds it |
209 | to the list of associated roles. |
210 | |
ef333f17 |
211 | =item B<does_role ($role_name)> |
212 | |
02a0fb52 |
213 | This will test if this class C<does> a given C<$role_name>. It will |
214 | not only check it's local roles, but ask them as well in order to |
215 | cascade down the role hierarchy. |
216 | |
4e848edb |
217 | =item B<add_attribute $attr_name, %params> |
218 | |
219 | This method does the same thing as L<Class::MOP::Class/add_attribute>, but adds |
220 | suport for delegation. |
221 | |
222 | =back |
223 | |
224 | =head1 INTERNAL METHODS |
225 | |
226 | =over 4 |
227 | |
228 | =item compute_delegation |
229 | |
230 | =item generate_delegation_list |
231 | |
232 | =item generate_delgate_method |
233 | |
234 | =item get_delegatable_methods |
235 | |
ac1ef2f9 |
236 | =item filter_delegations |
237 | |
c0e30cf5 |
238 | =back |
239 | |
240 | =head1 BUGS |
241 | |
242 | All complex software has bugs lurking in it, and this module is no |
243 | exception. If you find a bug please either email me, or add the bug |
244 | to cpan-RT. |
245 | |
c0e30cf5 |
246 | =head1 AUTHOR |
247 | |
248 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
249 | |
250 | =head1 COPYRIGHT AND LICENSE |
251 | |
252 | Copyright 2006 by Infinity Interactive, Inc. |
253 | |
254 | L<http://www.iinteractive.com> |
255 | |
256 | This library is free software; you can redistribute it and/or modify |
257 | it under the same terms as Perl itself. |
258 | |
8a7a9c53 |
259 | =cut |
1a563243 |
260 | |