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1 | package Reaction::Meta::InterfaceModel::Action::ParameterAttribute; |
2 | |
3 | use Reaction::Class; |
4 | use Scalar::Util 'blessed'; |
5 | |
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6 | use namespace::clean -except => [ qw(meta) ]; |
7 | extends 'Reaction::Meta::Attribute'; |
8 | |
9 | |
10 | has valid_values => ( |
11 | isa => 'CodeRef', |
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12 | is => 'rw', |
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13 | predicate => 'has_valid_values' |
14 | ); |
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15 | sub new { |
16 | my $self = shift->SUPER::new(@_); # work around immutable |
17 | if(!$self->has_valid_values and $self->has_type_constraint) { |
18 | my $tc = $self->type_constraint; |
19 | if($tc->isa('Moose::Meta::TypeConstraint::Enum')) { |
20 | $self->valid_values(sub { $tc->values }); |
21 | } |
22 | } |
23 | return $self; |
24 | } |
25 | |
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26 | sub check_valid_value { |
27 | my ($self, $object, $value) = @_; |
28 | confess "Can't check_valid_value when no valid_values set" |
29 | unless $self->has_valid_values; |
30 | confess join " - ", blessed($object), $self->name |
31 | unless ref $self->valid_values; |
32 | my $valid = $self->valid_values->($object, $self); |
33 | if ($self->type_constraint |
34 | && ($self->type_constraint->name eq 'ArrayRef' |
35 | || $self->type_constraint->is_subtype_of('ArrayRef'))) { |
36 | confess "Parameter type is array ref but passed value isn't" |
37 | unless ref($value) eq 'ARRAY'; |
38 | return [ map { $self->_check_single_valid($valid => $_) } @$value ]; |
39 | } else { |
40 | return $self->_check_single_valid($valid => $value); |
41 | } |
42 | }; |
43 | sub _check_single_valid { |
44 | my ($self, $valid, $value) = @_; |
45 | return undef unless defined($value); |
46 | if (ref $valid eq 'ARRAY') { |
47 | return $value if grep { $_ eq $value } @$valid; |
48 | } else { |
49 | $value = $value->ident_condition if blessed($value); |
50 | return $valid->find($value); |
51 | } |
52 | return undef; # XXX this is an assumption that undef is never valid |
53 | }; |
54 | sub all_valid_values { |
55 | my ($self, $object) = @_; |
56 | confess "Can't call all_valid_values on an attribute without valid_values" |
57 | unless $self->has_valid_values; |
58 | my $valid = $self->valid_values->($object, $self); |
59 | return ((ref $valid eq 'ARRAY') |
60 | ? @$valid |
61 | : $valid->all); |
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62 | }; |
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63 | sub valid_value_collection { |
64 | my ($self, $object) = @_; |
65 | confess "Can't call valid_value_collection on an attribute without valid_values" |
66 | unless $self->has_valid_values; |
67 | my $valid = $self->valid_values->($object, $self); |
68 | confess "valid_values returned an arrayref, not a collection" |
69 | if (ref $valid eq 'ARRAY'); |
70 | return $valid; |
71 | }; |
72 | |
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73 | __PACKAGE__->meta->make_immutable(inline_constructor => 0); |
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74 | |
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75 | |
76 | 1; |
77 | |
78 | =head1 NAME |
79 | |
80 | Reaction::Meta::InterfaceModel::Action::ParamterAttribute |
81 | |
82 | =head1 DESCRIPTION |
83 | |
84 | =head1 METHODS |
85 | |
86 | =head2 new |
87 | |
88 | =head2 valid_values |
89 | |
90 | =head2 has_valid_values |
91 | |
92 | =head2 check_valid_value |
93 | |
94 | =head2 all_valid_values |
95 | |
96 | =head2 valid_value_collection |
97 | |
98 | =head2 reader |
99 | |
100 | =head2 writer |
101 | |
102 | =head1 SEE ALSO |
103 | |
104 | L<Reaction::Meta::Attribute> |
105 | |
106 | =head1 AUTHORS |
107 | |
108 | See L<Reaction::Class> for authors. |
109 | |
110 | =head1 LICENSE |
111 | |
112 | See L<Reaction::Class> for the license. |
113 | |
114 | =cut |