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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::Meta::Parameter; |
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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'; |
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10 | use constant parameter_metaclass => 'MooseX::Role::Parameterized::Meta::Parameter'; |
11 | use constant parameters_class => 'MooseX::Role::Parameterized::Parameters'; |
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12 | |
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13 | has parameters_metaclass => ( |
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14 | is => 'rw', |
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15 | isa => 'Moose::Meta::Class', |
16 | lazy => 1, |
17 | default => sub { |
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18 | my $self = shift; |
19 | |
20 | $self->parameters_class->meta->create_anon_class( |
21 | superclasses => [$self->parameters_class], |
22 | attribute_metaclass => $self->parameter_metaclass, |
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23 | ); |
24 | }, |
25 | ); |
26 | |
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27 | has role_generator => ( |
28 | is => 'rw', |
29 | isa => 'CodeRef', |
30 | predicate => 'has_role_generator', |
31 | ); |
32 | |
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33 | sub add_parameter { |
34 | my $self = shift; |
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35 | my $name = shift; |
36 | |
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37 | confess "You must provide a name for the parameter" |
38 | if !defined($name); |
39 | |
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40 | # need to figure out a plan for these guys.. |
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41 | confess "The parameter name ($name) is currently forbidden" |
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42 | if $name eq 'alias' |
43 | || $name eq 'excludes'; |
44 | |
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45 | $self->parameters_metaclass->add_attribute($name => @_); |
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46 | } |
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47 | |
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48 | sub construct_parameters { |
49 | my $self = shift; |
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50 | my %args = @_; |
51 | |
52 | # need to figure out a plan for these guys.. |
53 | for my $name ('alias', 'excludes') { |
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54 | confess "The parameter name ($name) is currently forbidden" |
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55 | if exists $args{$name}; |
56 | } |
57 | |
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58 | $self->parameters_metaclass->new_object(\%args); |
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59 | } |
60 | |
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61 | sub generate_role { |
62 | my $self = shift; |
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63 | |
64 | my $parameters = @_ == 1 ? shift |
65 | : $self->construct_parameters(@_); |
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66 | |
67 | confess "A role generator is required to generate roles" |
68 | unless $self->has_role_generator; |
69 | |
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70 | my $role = $self->parameterized_role_metaclass->create_anon_role(parameters => $parameters); |
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71 | |
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72 | local $MooseX::Role::Parameterized::CURRENT_METACLASS = $role; |
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73 | |
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74 | $self->apply_parameterizable_role($role); |
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75 | |
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76 | $self->role_generator->($parameters, |
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77 | operating_on => $role, |
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78 | ); |
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79 | |
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80 | return $role; |
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81 | } |
82 | |
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83 | sub apply { |
84 | my $self = shift; |
85 | my $class = shift; |
86 | my %args = @_; |
87 | |
88 | my $role = $self->generate_role(%args); |
89 | $role->apply($class, %args); |
90 | } |
91 | |
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92 | sub apply_parameterizable_role { |
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93 | my $self = shift; |
94 | |
95 | $self->SUPER::apply(@_); |
96 | } |
97 | |
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98 | __PACKAGE__->meta->make_immutable; |
99 | no Moose; |
100 | |
101 | 1; |
102 | |
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103 | __END__ |
104 | |
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105 | =head1 NAME |
106 | |
107 | MooseX::Role::Parameterized::Meta::Role::Parameterizable - metaclass for parameterizable roles |
108 | |
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109 | =head1 DESCRIPTION |
110 | |
111 | This is the metaclass for parameteriz-able roles, roles that have their |
112 | parameters currently unbound. These are the roles that you use L<Moose/with>, |
113 | but instead of composing the parameteriz-able role, we construct a new |
114 | parameteriz-ed role |
115 | (L<MooseX::Role::Parameterized::Meta::Role::Parameterized>). |
116 | |
117 | =cut |
118 | |