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1 | #!/usr/bin/env perl |
2 | package Mouse::Meta::Role; |
3 | use strict; |
4 | use warnings; |
5 | |
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6 | do { |
7 | my %METACLASS_CACHE; |
8 | |
9 | # because Mouse doesn't introspect existing classes, we're forced to |
10 | # only pay attention to other Mouse classes |
11 | sub _metaclass_cache { |
12 | my $class = shift; |
13 | my $name = shift; |
14 | return $METACLASS_CACHE{$name}; |
15 | } |
16 | |
17 | sub initialize { |
18 | my $class = shift; |
19 | my $name = shift; |
20 | $METACLASS_CACHE{$name} = $class->new(name => $name) |
21 | if !exists($METACLASS_CACHE{$name}); |
22 | return $METACLASS_CACHE{$name}; |
23 | } |
24 | }; |
25 | |
26 | sub new { |
27 | my $class = shift; |
28 | my %args = @_; |
29 | |
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30 | $args{attributes} ||= {}; |
31 | |
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32 | bless \%args, $class; |
33 | } |
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34 | |
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35 | sub name { $_[0]->{name} } |
36 | |
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37 | sub add_attribute { |
38 | my $self = shift; |
39 | my $name = shift; |
40 | $self->{attributes}->{$name} = [ @_ ]; |
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41 | } |
42 | |
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43 | sub has_attribute { exists $_[0]->{attributes}->{$_[1]} } |
44 | sub get_attribute_list { keys %{ $_[0]->{attributes} } } |
45 | sub get_attribute { @{ $_->[0]->{attributes}->{$_[1]} || [] } } |
46 | |
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47 | sub apply { |
48 | my $self = shift; |
49 | my $class = shift; |
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50 | my $pkg = $class->name; |
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51 | |
52 | for my $name ($self->get_attribute_list) { |
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53 | my @spec = $self->get_attribute($name); |
54 | Mouse::Meta::Attribute->create($pkg, $name, @spec); |
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55 | } |
56 | |
57 | } |
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58 | |
a2227e71 |
59 | 1; |
60 | |