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1 | package MooseX::Role::Parameterized::Meta::Role::Parameterizable; |
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2 | use Moose; |
3 | extends 'Moose::Meta::Role'; |
4 | |
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5 | use MooseX::Role::Parameterized::Meta::Role::Parameterized; |
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6 | use MooseX::Role::Parameterized::Parameters; |
7 | |
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8 | use constant parameterized_role_metaclass => 'MooseX::Role::Parameterized::Meta::Role::Parameterized'; |
9 | |
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10 | has parameter_metaclass => ( |
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11 | is => 'rw', |
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12 | isa => 'Moose::Meta::Class', |
13 | lazy => 1, |
14 | default => sub { |
15 | Moose::Meta::Class->create_anon_class( |
16 | superclasses => ['MooseX::Role::Parameterized::Parameters'], |
17 | ); |
18 | }, |
19 | ); |
20 | |
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21 | has role_generator => ( |
22 | is => 'rw', |
23 | isa => 'CodeRef', |
24 | predicate => 'has_role_generator', |
25 | ); |
26 | |
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27 | sub add_parameter { |
28 | my $self = shift; |
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29 | my $name = shift; |
30 | |
31 | # need to figure out a plan for these guys.. |
32 | confess "The parameter name ($name) is currently forbidden." |
33 | if $name eq 'alias' |
34 | || $name eq 'excludes'; |
35 | |
36 | $self->parameter_metaclass->add_attribute($name => @_); |
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37 | } |
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38 | |
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39 | sub construct_parameters { |
40 | my $self = shift; |
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41 | my %args = @_; |
42 | |
43 | # need to figure out a plan for these guys.. |
44 | for my $name ('alias', 'excludes') { |
45 | confess "The parameter name ($name) is currently forbidden." |
46 | if exists $args{$name}; |
47 | } |
48 | |
49 | $self->parameter_metaclass->new_object(\%args); |
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50 | } |
51 | |
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52 | sub generate_role { |
53 | my $self = shift; |
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54 | |
55 | my $parameters = @_ == 1 ? shift |
56 | : $self->construct_parameters(@_); |
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57 | |
58 | confess "A role generator is required to generate roles" |
59 | unless $self->has_role_generator; |
60 | |
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61 | my $role = $self->parameterized_role_metaclass->create_anon_role(parameters => $parameters); |
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62 | |
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63 | local $MooseX::Role::Parameterized::CURRENT_METACLASS = $role; |
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64 | |
65 | $self->apply_parameterized_role($role); |
66 | |
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67 | $self->role_generator->($parameters, |
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68 | operating_on => $role, |
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69 | ); |
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70 | |
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71 | return $role; |
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72 | } |
73 | |
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74 | sub apply { |
75 | my $self = shift; |
76 | my $class = shift; |
77 | my %args = @_; |
78 | |
79 | my $role = $self->generate_role(%args); |
80 | $role->apply($class, %args); |
81 | } |
82 | |
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83 | sub apply_parameterized_role { |
84 | my $self = shift; |
85 | |
86 | $self->SUPER::apply(@_); |
87 | } |
88 | |
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89 | __PACKAGE__->meta->make_immutable; |
90 | no Moose; |
91 | |
92 | 1; |
93 | |
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94 | __END__ |
95 | |
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96 | =head1 NAME |
97 | |
98 | MooseX::Role::Parameterized::Meta::Role::Parameterizable - metaclass for parameterizable roles |
99 | |
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100 | =head1 DESCRIPTION |
101 | |
102 | This is the metaclass for parameteriz-able roles, roles that have their |
103 | parameters currently unbound. These are the roles that you use L<Moose/with>, |
104 | but instead of composing the parameteriz-able role, we construct a new |
105 | parameteriz-ed role |
106 | (L<MooseX::Role::Parameterized::Meta::Role::Parameterized>). |
107 | |
108 | =cut |
109 | |