Commit | Line | Data |
9b871d79 |
1 | package Class::MOP::Mixin::HasMethods; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
4fbd4b9b |
6 | our $VERSION = '0.98'; |
9b871d79 |
7 | $VERSION = eval $VERSION; |
8 | our $AUTHORITY = 'cpan:STEVAN'; |
9 | |
10 | use Scalar::Util 'blessed'; |
11 | use Carp 'confess'; |
12 | use Sub::Name 'subname'; |
13 | |
14 | use base 'Class::MOP::Mixin'; |
15 | |
16 | sub method_metaclass { $_[0]->{'method_metaclass'} } |
17 | sub wrapped_method_metaclass { $_[0]->{'wrapped_method_metaclass'} } |
18 | |
19 | # This doesn't always get initialized in a constructor because there is a |
20 | # weird object construction path for subclasses of Class::MOP::Class. At one |
21 | # point, this always got initialized by calling into the XS code first, but |
22 | # that is no longer guaranteed to happen. |
23 | sub _method_map { $_[0]->{'methods'} ||= {} } |
24 | |
25 | sub wrap_method_body { |
26 | my ( $self, %args ) = @_; |
27 | |
28 | ( 'CODE' eq ref $args{body} ) |
29 | || confess "Your code block must be a CODE reference"; |
30 | |
31 | $self->method_metaclass->wrap( |
32 | package_name => $self->name, |
33 | %args, |
34 | ); |
35 | } |
36 | |
37 | sub add_method { |
38 | my ( $self, $method_name, $method ) = @_; |
39 | ( defined $method_name && length $method_name ) |
40 | || confess "You must define a method name"; |
41 | |
42 | my $body; |
43 | if ( blessed($method) ) { |
44 | $body = $method->body; |
45 | if ( $method->package_name ne $self->name ) { |
46 | $method = $method->clone( |
47 | package_name => $self->name, |
48 | name => $method_name, |
49 | ) if $method->can('clone'); |
50 | } |
51 | |
52 | $method->attach_to_class($self); |
53 | } |
54 | else { |
55 | # If a raw code reference is supplied, its method object is not created. |
56 | # The method object won't be created until required. |
57 | $body = $method; |
58 | } |
59 | |
60 | $self->_method_map->{$method_name} = $method; |
61 | |
62 | my ( $current_package, $current_name ) = Class::MOP::get_code_info($body); |
63 | |
64 | if ( !defined $current_name || $current_name =~ /^__ANON__/ ) { |
65 | my $full_method_name = ( $self->name . '::' . $method_name ); |
66 | subname( $full_method_name => $body ); |
67 | } |
68 | |
69 | $self->add_package_symbol( |
70 | { sigil => '&', type => 'CODE', name => $method_name }, |
71 | $body, |
72 | ); |
73 | } |
74 | |
75 | sub _code_is_mine { |
76 | my ( $self, $code ) = @_; |
77 | |
78 | my ( $code_package, $code_name ) = Class::MOP::get_code_info($code); |
79 | |
80 | return $code_package && $code_package eq $self->name |
81 | || ( $code_package eq 'constant' && $code_name eq '__ANON__' ); |
82 | } |
83 | |
84 | sub has_method { |
85 | my ( $self, $method_name ) = @_; |
86 | |
87 | ( defined $method_name && length $method_name ) |
88 | || confess "You must define a method name"; |
89 | |
90 | return defined( $self->get_method($method_name) ); |
91 | } |
92 | |
93 | sub get_method { |
94 | my ( $self, $method_name ) = @_; |
95 | |
96 | ( defined $method_name && length $method_name ) |
97 | || confess "You must define a method name"; |
98 | |
99 | my $method_map = $self->_method_map; |
100 | my $map_entry = $method_map->{$method_name}; |
101 | my $code = $self->get_package_symbol( |
102 | { |
103 | name => $method_name, |
104 | sigil => '&', |
105 | type => 'CODE', |
106 | } |
107 | ); |
108 | |
109 | # This seems to happen in some weird cases where methods modifiers are |
110 | # added via roles or some other such bizareness. Honestly, I don't totally |
111 | # understand this, but returning the entry works, and keeps various MX |
112 | # modules from blowing up. - DR |
113 | return $map_entry if blessed $map_entry && !$code; |
114 | |
115 | return $map_entry if blessed $map_entry && $map_entry->body == $code; |
116 | |
117 | unless ($map_entry) { |
118 | return unless $code && $self->_code_is_mine($code); |
119 | } |
120 | |
121 | $code ||= $map_entry; |
122 | |
123 | return $method_map->{$method_name} = $self->wrap_method_body( |
124 | body => $code, |
125 | name => $method_name, |
126 | associated_metaclass => $self, |
127 | ); |
128 | } |
129 | |
130 | sub remove_method { |
131 | my ( $self, $method_name ) = @_; |
132 | ( defined $method_name && length $method_name ) |
133 | || confess "You must define a method name"; |
134 | |
135 | my $removed_method = delete $self->_full_method_map->{$method_name}; |
136 | |
137 | $self->remove_package_symbol( |
138 | { sigil => '&', type => 'CODE', name => $method_name } ); |
139 | |
140 | $removed_method->detach_from_class |
141 | if $removed_method && blessed $removed_method; |
142 | |
143 | # still valid, since we just removed the method from the map |
144 | $self->update_package_cache_flag; |
145 | |
146 | return $removed_method; |
147 | } |
148 | |
149 | sub get_method_list { |
150 | my $self = shift; |
151 | return grep { $self->has_method($_) } keys %{ $self->namespace }; |
152 | } |
153 | |
154 | 1; |
155 | |
156 | __END__ |
157 | |
158 | =pod |
159 | |
160 | =head1 NAME |
161 | |
162 | Class::MOP::Mixin::HasMethods - Methods for metaclasses which have methods |
163 | |
164 | =head1 DESCRIPTION |
165 | |
166 | This class implements methods for metaclasses which have methods |
167 | (L<Class::MOP::Package> and L<Moose::Meta::Role>). See L<Class::MOP::Package> |
168 | for API details. |
169 | |
170 | =head1 AUTHORS |
171 | |
172 | Dave Rolsky E<lt>autarch@urth.orgE<gt> |
173 | |
174 | =head1 COPYRIGHT AND LICENSE |
175 | |
3e2c8600 |
176 | Copyright 2006-2010 by Infinity Interactive, Inc. |
9b871d79 |
177 | |
178 | L<http://www.iinteractive.com> |
179 | |
180 | This library is free software; you can redistribute it and/or modify |
181 | it under the same terms as Perl itself. |
182 | |
183 | =cut |