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'; |
a7d0cd00 |
10 | use Scalar::Util 'weaken', 'blessed'; |
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', |
26 | @_); |
27 | } |
28 | |
ef333f17 |
29 | sub add_role { |
30 | my ($self, $role) = @_; |
31 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
32 | || confess "Roles must be instances of Moose::Meta::Role"; |
33 | push @{$self->roles} => $role; |
34 | } |
35 | |
36 | sub does_role { |
37 | my ($self, $role_name) = @_; |
38 | (defined $role_name) |
39 | || confess "You must supply a role name to look for"; |
40 | foreach my $role (@{$self->roles}) { |
bdabd620 |
41 | return 1 if $role->does_role($role_name); |
ef333f17 |
42 | } |
43 | return 0; |
44 | } |
45 | |
8c9d74e7 |
46 | sub new_object { |
47 | my ($class, %params) = @_; |
48 | my $self = $class->SUPER::new_object(%params); |
49 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
d500266f |
50 | next unless $params{$attr->name} && $attr->can('has_trigger') && $attr->has_trigger; |
daea75c9 |
51 | $attr->trigger->($self, $params{$attr->name}, $attr); |
8c9d74e7 |
52 | } |
53 | return $self; |
54 | } |
55 | |
a15dff8d |
56 | sub construct_instance { |
57 | my ($class, %params) = @_; |
e522431d |
58 | my $instance = $params{'__INSTANCE__'} || {}; |
a15dff8d |
59 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
d500266f |
60 | $attr->initialize_instance_slot($class, $instance, \%params) |
a15dff8d |
61 | } |
62 | return $instance; |
63 | } |
64 | |
a7d0cd00 |
65 | sub has_method { |
66 | my ($self, $method_name) = @_; |
67 | (defined $method_name && $method_name) |
68 | || confess "You must define a method name"; |
69 | |
70 | my $sub_name = ($self->name . '::' . $method_name); |
71 | |
72 | no strict 'refs'; |
73 | return 0 if !defined(&{$sub_name}); |
74 | my $method = \&{$sub_name}; |
75 | |
76 | return 1 if blessed($method) && $method->isa('Moose::Meta::Role::Method'); |
77 | return $self->SUPER::has_method($method_name); |
78 | } |
79 | |
80 | |
78cd1d3b |
81 | sub add_override_method_modifier { |
82 | my ($self, $name, $method, $_super_package) = @_; |
83 | # need this for roles ... |
84 | $_super_package ||= $self->name; |
85 | my $super = $self->find_next_method_by_name($name); |
86 | (defined $super) |
87 | || confess "You cannot override '$name' because it has no super method"; |
05d9eaf6 |
88 | $self->add_method($name => bless sub { |
78cd1d3b |
89 | my @args = @_; |
90 | no strict 'refs'; |
91 | no warnings 'redefine'; |
92 | local *{$_super_package . '::super'} = sub { $super->(@args) }; |
93 | return $method->(@args); |
05d9eaf6 |
94 | } => 'Moose::Meta::Method::Overriden'); |
78cd1d3b |
95 | } |
96 | |
97 | sub add_augment_method_modifier { |
05d9eaf6 |
98 | my ($self, $name, $method) = @_; |
78cd1d3b |
99 | my $super = $self->find_next_method_by_name($name); |
100 | (defined $super) |
05d9eaf6 |
101 | || confess "You cannot augment '$name' because it has no super method"; |
102 | my $_super_package = $super->package_name; |
103 | # BUT!,... if this is an overriden method .... |
104 | if ($super->isa('Moose::Meta::Method::Overriden')) { |
105 | # we need to be sure that we actually |
106 | # find the next method, which is not |
107 | # an 'override' method, the reason is |
108 | # that an 'override' method will not |
109 | # be the one calling inner() |
110 | my $real_super = $self->_find_next_method_by_name_which_is_not_overridden($name); |
111 | $_super_package = $real_super->package_name; |
112 | } |
78cd1d3b |
113 | $self->add_method($name => sub { |
114 | my @args = @_; |
115 | no strict 'refs'; |
116 | no warnings 'redefine'; |
05d9eaf6 |
117 | local *{$_super_package . '::inner'} = sub { $method->(@args) }; |
78cd1d3b |
118 | return $super->(@args); |
119 | }); |
120 | } |
121 | |
05d9eaf6 |
122 | sub _find_next_method_by_name_which_is_not_overridden { |
123 | my ($self, $name) = @_; |
124 | my @methods = $self->find_all_methods_by_name($name); |
125 | foreach my $method (@methods) { |
126 | return $method->{code} |
127 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overriden'); |
128 | } |
129 | return undef; |
130 | } |
131 | |
132 | package Moose::Meta::Method::Overriden; |
133 | |
134 | use strict; |
135 | use warnings; |
136 | |
137 | our $VERSION = '0.01'; |
138 | |
139 | use base 'Class::MOP::Method'; |
140 | |
c0e30cf5 |
141 | 1; |
142 | |
143 | __END__ |
144 | |
145 | =pod |
146 | |
147 | =head1 NAME |
148 | |
e522431d |
149 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
150 | |
c0e30cf5 |
151 | =head1 DESCRIPTION |
152 | |
e522431d |
153 | This is a subclass of L<Class::MOP::Class> with Moose specific |
154 | extensions. |
155 | |
6ba6d68c |
156 | For the most part, the only time you will ever encounter an |
157 | instance of this class is if you are doing some serious deep |
158 | introspection. To really understand this class, you need to refer |
159 | to the L<Class::MOP::Class> documentation. |
160 | |
c0e30cf5 |
161 | =head1 METHODS |
162 | |
163 | =over 4 |
164 | |
590868a3 |
165 | =item B<initialize> |
166 | |
8c9d74e7 |
167 | =item B<new_object> |
168 | |
02a0fb52 |
169 | We override this method to support the C<trigger> attribute option. |
170 | |
a15dff8d |
171 | =item B<construct_instance> |
172 | |
6ba6d68c |
173 | This provides some Moose specific extensions to this method, you |
174 | almost never call this method directly unless you really know what |
175 | you are doing. |
176 | |
177 | This method makes sure to handle the moose weak-ref, type-constraint |
178 | and type coercion features. |
ef1d5f4b |
179 | |
e9ec68d6 |
180 | =item B<has_method ($name)> |
181 | |
182 | This accomidates Moose::Meta::Role::Method instances, which are |
183 | aliased, instead of added, but still need to be counted as valid |
184 | methods. |
185 | |
78cd1d3b |
186 | =item B<add_override_method_modifier ($name, $method)> |
187 | |
02a0fb52 |
188 | This will create an C<override> method modifier for you, and install |
189 | it in the package. |
190 | |
78cd1d3b |
191 | =item B<add_augment_method_modifier ($name, $method)> |
192 | |
02a0fb52 |
193 | This will create an C<augment> method modifier for you, and install |
194 | it in the package. |
195 | |
ef333f17 |
196 | =item B<roles> |
197 | |
02a0fb52 |
198 | This will return an array of C<Moose::Meta::Role> instances which are |
199 | attached to this class. |
200 | |
ef333f17 |
201 | =item B<add_role ($role)> |
202 | |
02a0fb52 |
203 | This takes an instance of C<Moose::Meta::Role> in C<$role>, and adds it |
204 | to the list of associated roles. |
205 | |
ef333f17 |
206 | =item B<does_role ($role_name)> |
207 | |
02a0fb52 |
208 | This will test if this class C<does> a given C<$role_name>. It will |
209 | not only check it's local roles, but ask them as well in order to |
210 | cascade down the role hierarchy. |
211 | |
c0e30cf5 |
212 | =back |
213 | |
214 | =head1 BUGS |
215 | |
216 | All complex software has bugs lurking in it, and this module is no |
217 | exception. If you find a bug please either email me, or add the bug |
218 | to cpan-RT. |
219 | |
c0e30cf5 |
220 | =head1 AUTHOR |
221 | |
222 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
223 | |
224 | =head1 COPYRIGHT AND LICENSE |
225 | |
226 | Copyright 2006 by Infinity Interactive, Inc. |
227 | |
228 | L<http://www.iinteractive.com> |
229 | |
230 | This library is free software; you can redistribute it and/or modify |
231 | it under the same terms as Perl itself. |
232 | |
233 | =cut |