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1 | |
2 | package Moose::Meta::TypeConstraint::Registry; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | use metaclass; |
7 | |
8 | use Scalar::Util 'blessed'; |
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9 | |
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10 | our $VERSION = '0.71_01'; |
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11 | $VERSION = eval $VERSION; |
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12 | our $AUTHORITY = 'cpan:STEVAN'; |
13 | |
14 | use base 'Class::MOP::Object'; |
15 | |
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16 | __PACKAGE__->meta->add_attribute('parent_registry' => ( |
17 | reader => 'get_parent_registry', |
18 | writer => 'set_parent_registry', |
19 | predicate => 'has_parent_registry', |
20 | )); |
21 | |
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22 | __PACKAGE__->meta->add_attribute('type_constraints' => ( |
23 | reader => 'type_constraints', |
24 | default => sub { {} } |
25 | )); |
26 | |
27 | sub new { |
28 | my $class = shift; |
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29 | my $self = $class->_new(@_); |
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30 | return $self; |
31 | } |
32 | |
33 | sub has_type_constraint { |
34 | my ($self, $type_name) = @_; |
4c015454 |
35 | ($type_name and exists $self->type_constraints->{$type_name}) ? 1 : 0 |
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36 | } |
37 | |
38 | sub get_type_constraint { |
39 | my ($self, $type_name) = @_; |
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40 | return unless defined $type_name; |
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41 | $self->type_constraints->{$type_name} |
42 | } |
43 | |
44 | sub add_type_constraint { |
45 | my ($self, $type) = @_; |
70ea9161 |
46 | |
47 | unless ( $type && blessed $type && $type->isa('Moose::Meta::TypeConstraint') ) { |
48 | require Moose; |
49 | Moose->throw_error("No type supplied / type is not a valid type constraint"); |
50 | } |
51 | |
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52 | $self->type_constraints->{$type->name} = $type; |
53 | } |
54 | |
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55 | sub find_type_constraint { |
56 | my ($self, $type_name) = @_; |
57 | return $self->get_type_constraint($type_name) |
58 | if $self->has_type_constraint($type_name); |
59 | return $self->get_parent_registry->find_type_constraint($type_name) |
60 | if $self->has_parent_registry; |
61 | return; |
62 | } |
63 | |
22aed3c0 |
64 | 1; |
65 | |
66 | __END__ |
67 | |
68 | |
69 | =pod |
70 | |
71 | =head1 NAME |
72 | |
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73 | Moose::Meta::TypeConstraint::Registry - registry for type constraints |
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74 | |
75 | =head1 DESCRIPTION |
76 | |
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77 | This module is currently only use internally by L<Moose::Util::TypeConstraints>. |
78 | It can be used to create your own private type constraint registry as well, but |
79 | the details of that are currently left as an exercise to the reader. (One hint: |
80 | You can use the 'parent_registry' feature to connect your private version with the |
81 | base Moose registry and base Moose types will automagically be found too). |
82 | |
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83 | =head1 METHODS |
84 | |
85 | =over 4 |
86 | |
87 | =item B<meta> |
88 | |
89 | =item B<new> |
90 | |
183ba44e |
91 | =item B<get_parent_registry> |
92 | |
93 | =item B<set_parent_registry ($registry)> |
94 | |
95 | =item B<has_parent_registry> |
96 | |
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97 | =item B<type_constraints> |
98 | |
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99 | =item B<has_type_constraint ($type_name)> |
100 | |
101 | =item B<get_type_constraint ($type_name)> |
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102 | |
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103 | Returns a type constraint object from the registry by name. Will return |
104 | false if the supplied type name cannot be found. |
105 | |
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106 | =item B<add_type_constraint ($type)> |
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107 | |
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108 | Adds a type constraint object to the registry. Will throw an exception if |
109 | no type is supplied, or the supplied object does not inherit from |
110 | L<Moose::Meta::TypeConstraint> |
111 | |
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112 | =item B<find_type_constraint ($type_name)> |
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113 | |
114 | =back |
115 | |
116 | =head1 BUGS |
117 | |
118 | All complex software has bugs lurking in it, and this module is no |
119 | exception. If you find a bug please either email me, or add the bug |
120 | to cpan-RT. |
121 | |
122 | =head1 AUTHOR |
123 | |
124 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
125 | |
126 | =head1 COPYRIGHT AND LICENSE |
127 | |
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128 | Copyright 2006-2009 by Infinity Interactive, Inc. |
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129 | |
130 | L<http://www.iinteractive.com> |
131 | |
132 | This library is free software; you can redistribute it and/or modify |
133 | it under the same terms as Perl itself. |
134 | |
135 | =cut |