Commit | Line | Data |
38bf2a25 |
1 | package Class::MOP::Mixin::HasMethods; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | use Class::MOP::Method::Meta; |
7 | |
38bf2a25 |
8 | use Scalar::Util 'blessed'; |
9 | use Carp 'confess'; |
10 | use Sub::Name 'subname'; |
11 | |
12 | use base 'Class::MOP::Mixin'; |
13 | |
14 | sub _meta_method_class { 'Class::MOP::Method::Meta' } |
15 | |
16 | sub _add_meta_method { |
17 | my $self = shift; |
18 | my ($name) = @_; |
19 | my $existing_method = $self->can('find_method_by_name') |
20 | ? $self->find_method_by_name($name) |
21 | : $self->get_method($name); |
22 | return if $existing_method |
23 | && $existing_method->isa($self->_meta_method_class); |
24 | $self->add_method( |
25 | $name => $self->_meta_method_class->wrap( |
26 | name => $name, |
27 | package_name => $self->name, |
28 | associated_metaclass => $self, |
29 | ) |
30 | ); |
31 | } |
32 | |
33 | sub wrap_method_body { |
34 | my ( $self, %args ) = @_; |
35 | |
36 | ( 'CODE' eq ref $args{body} ) |
37 | || confess "Your code block must be a CODE reference"; |
38 | |
39 | $self->method_metaclass->wrap( |
40 | package_name => $self->name, |
41 | %args, |
42 | ); |
43 | } |
44 | |
45 | sub add_method { |
46 | my ( $self, $method_name, $method ) = @_; |
47 | ( defined $method_name && length $method_name ) |
48 | || confess "You must define a method name"; |
49 | |
50 | my $package_name = $self->name; |
51 | |
52 | my $body; |
53 | if ( blessed($method) ) { |
54 | $body = $method->body; |
55 | if ( $method->package_name ne $package_name ) { |
56 | $method = $method->clone( |
57 | package_name => $package_name, |
58 | name => $method_name, |
59 | ); |
60 | } |
61 | |
62 | $method->attach_to_class($self); |
63 | } |
64 | else { |
65 | # If a raw code reference is supplied, its method object is not created. |
66 | # The method object won't be created until required. |
67 | $body = $method; |
68 | } |
69 | |
70 | $self->_method_map->{$method_name} = $method; |
71 | |
72 | my ($current_package, $current_name) = Class::MOP::get_code_info($body); |
73 | |
74 | subname($package_name . '::' . $method_name, $body) |
75 | unless defined $current_name && $current_name !~ /^__ANON__/; |
76 | |
77 | $self->add_package_symbol("&$method_name", $body); |
78 | |
79 | # we added the method to the method map too, so it's still valid |
80 | $self->update_package_cache_flag; |
81 | } |
82 | |
83 | sub _code_is_mine { |
84 | my ( $self, $code ) = @_; |
85 | |
86 | my ( $code_package, $code_name ) = Class::MOP::get_code_info($code); |
87 | |
88 | return ( $code_package && $code_package eq $self->name ) |
89 | || ( $code_package eq 'constant' && $code_name eq '__ANON__' ); |
90 | } |
91 | |
92 | sub has_method { |
93 | my ( $self, $method_name ) = @_; |
94 | |
95 | ( defined $method_name && length $method_name ) |
96 | || confess "You must define a method name"; |
97 | |
98 | my $method = $self->_get_maybe_raw_method($method_name) |
99 | or return; |
100 | |
101 | return defined($self->_method_map->{$method_name} = $method); |
102 | } |
103 | |
104 | sub get_method { |
105 | my ( $self, $method_name ) = @_; |
106 | |
107 | ( defined $method_name && length $method_name ) |
108 | || confess "You must define a method name"; |
109 | |
110 | my $method = $self->_get_maybe_raw_method($method_name) |
111 | or return; |
112 | |
113 | return $method if blessed $method; |
114 | |
115 | return $self->_method_map->{$method_name} = $self->wrap_method_body( |
116 | body => $method, |
117 | name => $method_name, |
118 | associated_metaclass => $self, |
119 | ); |
120 | } |
121 | |
122 | sub _get_maybe_raw_method { |
123 | my ( $self, $method_name ) = @_; |
124 | |
125 | my $map_entry = $self->_method_map->{$method_name}; |
126 | return $map_entry if defined $map_entry; |
127 | |
128 | my $code = $self->get_package_symbol("&$method_name"); |
129 | |
130 | return unless $code && $self->_code_is_mine($code); |
131 | |
132 | return $code; |
133 | } |
134 | |
135 | sub remove_method { |
136 | my ( $self, $method_name ) = @_; |
137 | |
138 | ( defined $method_name && length $method_name ) |
139 | || confess "You must define a method name"; |
140 | |
141 | my $removed_method = delete $self->_method_map->{$method_name}; |
142 | |
143 | $self->remove_package_symbol("&$method_name"); |
144 | |
145 | $removed_method->detach_from_class |
146 | if blessed($removed_method); |
147 | |
148 | # still valid, since we just removed the method from the map |
149 | $self->update_package_cache_flag; |
150 | |
151 | return $removed_method; |
152 | } |
153 | |
154 | sub get_method_list { |
155 | my $self = shift; |
156 | |
157 | return keys %{ $self->_full_method_map }; |
158 | } |
159 | |
160 | sub _get_local_methods { |
161 | my $self = shift; |
162 | |
163 | return values %{ $self->_full_method_map }; |
164 | } |
165 | |
166 | sub _restore_metamethods_from { |
167 | my $self = shift; |
168 | my ($old_meta) = @_; |
169 | |
170 | for my $method ($old_meta->_get_local_methods) { |
171 | $method->_make_compatible_with($self->method_metaclass); |
172 | $self->add_method($method->name => $method); |
173 | } |
174 | } |
175 | |
176 | sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef } |
177 | sub update_package_cache_flag { |
178 | my $self = shift; |
179 | # NOTE: |
180 | # we can manually update the cache number |
181 | # since we are actually adding the method |
182 | # to our cache as well. This avoids us |
183 | # having to regenerate the method_map. |
184 | # - SL |
185 | $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name); |
186 | } |
187 | |
188 | sub _full_method_map { |
189 | my $self = shift; |
190 | |
191 | my $pkg_gen = Class::MOP::check_package_cache_flag($self->name); |
192 | |
193 | if (($self->{_package_cache_flag_full} || -1) != $pkg_gen) { |
194 | # forcibly reify all method map entries |
195 | $self->get_method($_) |
196 | for $self->list_all_package_symbols('CODE'); |
197 | $self->{_package_cache_flag_full} = $pkg_gen; |
198 | } |
199 | |
200 | return $self->_method_map; |
201 | } |
202 | |
203 | 1; |
204 | |
205 | # ABSTRACT: Methods for metaclasses which have methods |
206 | |
207 | __END__ |
208 | |
209 | =pod |
210 | |
211 | =head1 DESCRIPTION |
212 | |
213 | This class implements methods for metaclasses which have methods |
214 | (L<Class::MOP::Package> and L<Moose::Meta::Role>). See L<Class::MOP::Package> |
215 | for API details. |
216 | |
217 | =cut |