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1 | #!/usr/bin/env perl |
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2 | package MooseX::Role::Parameterized::Meta::Role::Parameterizable; |
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3 | use Moose; |
4 | extends 'Moose::Meta::Role'; |
5 | |
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6 | use MooseX::Role::Parameterized::Meta::Role::Parameterized; |
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7 | use MooseX::Role::Parameterized::Parameters; |
8 | |
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9 | use constant parameterized_role_metaclass => 'MooseX::Role::Parameterized::Meta::Role::Parameterized'; |
10 | |
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11 | has parameter_metaclass => ( |
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12 | is => 'rw', |
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13 | isa => 'Moose::Meta::Class', |
14 | lazy => 1, |
15 | default => sub { |
16 | Moose::Meta::Class->create_anon_class( |
17 | superclasses => ['MooseX::Role::Parameterized::Parameters'], |
18 | ); |
19 | }, |
20 | ); |
21 | |
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22 | has role_generator => ( |
23 | is => 'rw', |
24 | isa => 'CodeRef', |
25 | predicate => 'has_role_generator', |
26 | ); |
27 | |
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28 | sub add_parameter { |
29 | my $self = shift; |
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30 | my $name = shift; |
31 | |
32 | # need to figure out a plan for these guys.. |
33 | confess "The parameter name ($name) is currently forbidden." |
34 | if $name eq 'alias' |
35 | || $name eq 'excludes'; |
36 | |
37 | $self->parameter_metaclass->add_attribute($name => @_); |
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38 | } |
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39 | |
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40 | sub construct_parameters { |
41 | my $self = shift; |
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42 | my %args = @_; |
43 | |
44 | # need to figure out a plan for these guys.. |
45 | for my $name ('alias', 'excludes') { |
46 | confess "The parameter name ($name) is currently forbidden." |
47 | if exists $args{$name}; |
48 | } |
49 | |
50 | $self->parameter_metaclass->new_object(\%args); |
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51 | } |
52 | |
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53 | sub generate_role { |
54 | my $self = shift; |
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55 | |
56 | my $parameters = @_ == 1 ? shift |
57 | : $self->construct_parameters(@_); |
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58 | |
59 | confess "A role generator is required to generate roles" |
60 | unless $self->has_role_generator; |
61 | |
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62 | my $role = $self->parameterized_role_metaclass->create_anon_role(parameters => $parameters); |
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63 | |
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64 | local $MooseX::Role::Parameterized::CURRENT_METACLASS = $role; |
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65 | $self->role_generator->($parameters, |
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66 | operating_on => $role, |
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67 | ); |
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68 | |
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69 | return $role; |
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70 | } |
71 | |
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72 | sub apply { |
73 | my $self = shift; |
74 | my $class = shift; |
75 | my %args = @_; |
76 | |
77 | my $role = $self->generate_role(%args); |
78 | $role->apply($class, %args); |
79 | } |
80 | |
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81 | __PACKAGE__->meta->make_immutable; |
82 | no Moose; |
83 | |
84 | 1; |
85 | |