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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 parameters_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 $name = shift; |
30 | |
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31 | confess "You must provide a name for the parameter" |
32 | if !defined($name); |
33 | |
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34 | # need to figure out a plan for these guys.. |
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35 | confess "The parameter name ($name) is currently forbidden" |
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36 | if $name eq 'alias' |
37 | || $name eq 'excludes'; |
38 | |
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39 | $self->parameters_metaclass->add_attribute($name => @_); |
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40 | } |
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41 | |
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42 | sub construct_parameters { |
43 | my $self = shift; |
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44 | my %args = @_; |
45 | |
46 | # need to figure out a plan for these guys.. |
47 | for my $name ('alias', 'excludes') { |
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48 | confess "The parameter name ($name) is currently forbidden" |
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49 | if exists $args{$name}; |
50 | } |
51 | |
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52 | $self->parameters_metaclass->new_object(\%args); |
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53 | } |
54 | |
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55 | sub generate_role { |
56 | my $self = shift; |
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57 | |
58 | my $parameters = @_ == 1 ? shift |
59 | : $self->construct_parameters(@_); |
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60 | |
61 | confess "A role generator is required to generate roles" |
62 | unless $self->has_role_generator; |
63 | |
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64 | my $role = $self->parameterized_role_metaclass->create_anon_role(parameters => $parameters); |
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65 | |
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66 | local $MooseX::Role::Parameterized::CURRENT_METACLASS = $role; |
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67 | |
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68 | $self->apply_parameterizable_role($role); |
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69 | |
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70 | $self->role_generator->($parameters, |
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71 | operating_on => $role, |
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72 | ); |
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73 | |
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74 | return $role; |
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75 | } |
76 | |
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77 | sub apply { |
78 | my $self = shift; |
79 | my $class = shift; |
80 | my %args = @_; |
81 | |
82 | my $role = $self->generate_role(%args); |
83 | $role->apply($class, %args); |
84 | } |
85 | |
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86 | sub apply_parameterizable_role { |
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87 | my $self = shift; |
88 | |
89 | $self->SUPER::apply(@_); |
90 | } |
91 | |
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92 | __PACKAGE__->meta->make_immutable; |
93 | no Moose; |
94 | |
95 | 1; |
96 | |
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97 | __END__ |
98 | |
30788701 |
99 | =head1 NAME |
100 | |
101 | MooseX::Role::Parameterized::Meta::Role::Parameterizable - metaclass for parameterizable roles |
102 | |
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103 | =head1 DESCRIPTION |
104 | |
105 | This is the metaclass for parameteriz-able roles, roles that have their |
106 | parameters currently unbound. These are the roles that you use L<Moose/with>, |
107 | but instead of composing the parameteriz-able role, we construct a new |
108 | parameteriz-ed role |
109 | (L<MooseX::Role::Parameterized::Meta::Role::Parameterized>). |
110 | |
111 | =cut |
112 | |