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a2227e71 |
1 | #!/usr/bin/env perl |
2 | package Mouse::Meta::Role; |
3 | use strict; |
4 | use warnings; |
59089ec3 |
5 | use Carp 'confess'; |
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6 | |
acf0f643 |
7 | do { |
8 | my %METACLASS_CACHE; |
9 | |
10 | # because Mouse doesn't introspect existing classes, we're forced to |
11 | # only pay attention to other Mouse classes |
12 | sub _metaclass_cache { |
13 | my $class = shift; |
14 | my $name = shift; |
15 | return $METACLASS_CACHE{$name}; |
16 | } |
17 | |
18 | sub initialize { |
19 | my $class = shift; |
20 | my $name = shift; |
21 | $METACLASS_CACHE{$name} = $class->new(name => $name) |
22 | if !exists($METACLASS_CACHE{$name}); |
23 | return $METACLASS_CACHE{$name}; |
24 | } |
25 | }; |
26 | |
27 | sub new { |
28 | my $class = shift; |
29 | my %args = @_; |
30 | |
59089ec3 |
31 | $args{attributes} ||= {}; |
32 | $args{required_methods} ||= []; |
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33 | |
acf0f643 |
34 | bless \%args, $class; |
35 | } |
a2227e71 |
36 | |
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37 | sub name { $_[0]->{name} } |
38 | |
59089ec3 |
39 | sub add_required_methods { |
40 | my $self = shift; |
41 | my @methods = @_; |
42 | push @{$self->{required_methods}}, @methods; |
43 | } |
44 | |
274b6cce |
45 | sub add_attribute { |
46 | my $self = shift; |
47 | my $name = shift; |
69ac1dcf |
48 | my $spec = shift; |
49 | $self->{attributes}->{$name} = $spec; |
da0c885d |
50 | } |
51 | |
274b6cce |
52 | sub has_attribute { exists $_[0]->{attributes}->{$_[1]} } |
53 | sub get_attribute_list { keys %{ $_[0]->{attributes} } } |
69ac1dcf |
54 | sub get_attribute { $_[0]->{attributes}->{$_[1]} } |
274b6cce |
55 | |
da0c885d |
56 | sub apply { |
57 | my $self = shift; |
58 | my $class = shift; |
da0c885d |
59 | |
59089ec3 |
60 | for my $name (@{$self->{required_methods}}) { |
61 | unless ($class->name->can($name)) { |
62 | confess "'@{[ $self->name ]}' requires the method '$name' to be implemented by '@{[ $class->name ]}'"; |
63 | } |
64 | } |
65 | |
da0c885d |
66 | for my $name ($self->get_attribute_list) { |
0ba3591e |
67 | next if $class->has_attribute($name); |
ba33632e |
68 | my $spec = $self->get_attribute($name); |
724c77c0 |
69 | Mouse::Meta::Attribute->create($class, $name, %$spec); |
da0c885d |
70 | } |
d99db7b6 |
71 | |
72 | for my $modifier_type (qw/before after around/) { |
73 | my $add_method = "add_${modifier_type}_method_modifier"; |
74 | my $modified = $self->{"${modifier_type}_method_modifiers"}; |
75 | |
76 | for my $method_name (keys %$modified) { |
77 | for my $code (@{ $modified->{$method_name} }) { |
78 | $class->$add_method($method_name => $code); |
79 | } |
80 | } |
81 | } |
da0c885d |
82 | } |
0fc8adbc |
83 | |
c2f128e7 |
84 | for my $modifier_type (qw/before after around/) { |
85 | no strict 'refs'; |
fc0e0bbd |
86 | *{ __PACKAGE__ . '::' . "add_${modifier_type}_method_modifier" } = sub { |
87 | my ($self, $method_name, $method) = @_; |
88 | |
89 | push @{ $self->{"${modifier_type}_method_modifiers"}->{$method_name} }, |
90 | $method; |
91 | }; |
92 | |
c2f128e7 |
93 | *{ __PACKAGE__ . '::' . "get_${modifier_type}_method_modifiers" } = sub { |
94 | my ($self, $method_name, $method) = @_; |
95 | @{ $self->{"${modifier_type}_method_modifiers"}->{$method_name} || [] } |
96 | }; |
97 | } |
98 | |
a2227e71 |
99 | 1; |
100 | |