Commit | Line | Data |
30bf0c82 |
1 | package Class::MOP::Mixin::HasMethods; |
e3e651fb |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | use Scalar::Util 'blessed'; |
7 | use Carp 'confess'; |
8 | use Sub::Name 'subname'; |
9 | |
10 | use base 'Class::MOP::Object'; |
11 | |
12 | sub method_metaclass { $_[0]->{'method_metaclass'} } |
13 | sub wrapped_method_metaclass { $_[0]->{'wrapped_method_metaclass'} } |
14 | |
15 | # This doesn't always get initialized in a constructor because there is a |
16 | # weird object construction path for subclasses of Class::MOP::Class. At one |
17 | # point, this always got initialized by calling into the XS code first, but |
18 | # that is no longer guaranteed to happen. |
19 | sub _method_map { $_[0]->{'methods'} ||= {} } |
20 | |
21 | sub wrap_method_body { |
22 | my ( $self, %args ) = @_; |
23 | |
24 | ( 'CODE' eq ref $args{body} ) |
25 | || confess "Your code block must be a CODE reference"; |
26 | |
27 | $self->method_metaclass->wrap( |
28 | package_name => $self->name, |
29 | %args, |
30 | ); |
31 | } |
32 | |
33 | sub add_method { |
34 | my ( $self, $method_name, $method ) = @_; |
35 | ( defined $method_name && length $method_name ) |
36 | || confess "You must define a method name"; |
37 | |
38 | my $body; |
39 | if ( blessed($method) ) { |
40 | $body = $method->body; |
41 | if ( $method->package_name ne $self->name ) { |
42 | $method = $method->clone( |
43 | package_name => $self->name, |
44 | name => $method_name, |
45 | ) if $method->can('clone'); |
46 | } |
47 | |
48 | $method->attach_to_class($self); |
49 | } |
50 | else { |
51 | # If a raw code reference is supplied, its method object is not created. |
52 | # The method object won't be created until required. |
53 | $body = $method; |
54 | } |
55 | |
56 | $self->_method_map->{$method_name} = $method; |
57 | |
58 | my ( $current_package, $current_name ) = Class::MOP::get_code_info($body); |
59 | |
60 | if ( !defined $current_name || $current_name =~ /^__ANON__/ ) { |
61 | my $full_method_name = ( $self->name . '::' . $method_name ); |
62 | subname( $full_method_name => $body ); |
63 | } |
64 | |
65 | $self->add_package_symbol( |
66 | { sigil => '&', type => 'CODE', name => $method_name }, |
67 | $body, |
68 | ); |
69 | } |
70 | |
71 | sub _code_is_mine { |
72 | my ( $self, $code ) = @_; |
73 | |
74 | my ( $code_package, $code_name ) = Class::MOP::get_code_info($code); |
75 | |
76 | return $code_package && $code_package eq $self->name |
77 | || ( $code_package eq 'constant' && $code_name eq '__ANON__' ); |
78 | } |
79 | |
80 | sub has_method { |
81 | my ( $self, $method_name ) = @_; |
82 | |
83 | ( defined $method_name && length $method_name ) |
84 | || confess "You must define a method name"; |
85 | |
86 | return defined( $self->get_method($method_name) ); |
87 | } |
88 | |
89 | sub get_method { |
90 | my ( $self, $method_name ) = @_; |
91 | |
92 | ( defined $method_name && length $method_name ) |
93 | || confess "You must define a method name"; |
94 | |
95 | my $method_map = $self->_method_map; |
96 | my $map_entry = $method_map->{$method_name}; |
97 | my $code = $self->get_package_symbol( |
98 | { |
99 | name => $method_name, |
100 | sigil => '&', |
101 | type => 'CODE', |
102 | } |
103 | ); |
104 | |
105 | # This seems to happen in some weird cases where methods modifiers are |
106 | # added via roles or some other such bizareness. Honestly, I don't totally |
107 | # understand this, but returning the entry works, and keeps various MX |
108 | # modules from blowing up. - DR |
109 | return $map_entry if blessed $map_entry && !$code; |
110 | |
111 | return $map_entry if blessed $map_entry && $map_entry->body == $code; |
112 | |
113 | unless ($map_entry) { |
114 | return unless $code && $self->_code_is_mine($code); |
115 | } |
116 | |
117 | $code ||= $map_entry; |
118 | |
119 | return $method_map->{$method_name} = $self->wrap_method_body( |
120 | body => $code, |
121 | name => $method_name, |
122 | associated_metaclass => $self, |
123 | ); |
124 | } |
125 | |
126 | sub remove_method { |
127 | my ( $self, $method_name ) = @_; |
128 | ( defined $method_name && length $method_name ) |
129 | || confess "You must define a method name"; |
130 | |
131 | my $removed_method = delete $self->_full_method_map->{$method_name}; |
132 | |
133 | $self->remove_package_symbol( |
134 | { sigil => '&', type => 'CODE', name => $method_name } ); |
135 | |
136 | $removed_method->detach_from_class |
137 | if $removed_method && blessed $removed_method; |
138 | |
139 | # still valid, since we just removed the method from the map |
140 | $self->update_package_cache_flag; |
141 | |
142 | return $removed_method; |
143 | } |
144 | |
145 | sub get_method_list { |
146 | my $self = shift; |
147 | return grep { $self->has_method($_) } keys %{ $self->namespace }; |
148 | } |
149 | |
150 | 1; |