Commit | Line | Data |
8c651099 |
1 | |
2 | package MooseX::AttributeHelpers::Collection; |
3 | use Moose; |
4 | use Moose::Util::TypeConstraints; |
5 | |
6 | our $VERSION = '0.01'; |
7 | our $AUTHORITY = 'cpan:STEVAN'; |
8 | |
9 | extends 'MooseX::AttributeHelpers::Base'; |
10 | |
11 | has 'container_type' => ( |
12 | is => 'ro', |
13 | isa => 'Str', |
14 | predicate => 'has_container_type', |
15 | ); |
16 | |
17 | has 'container_type_constraint' => ( |
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18 | is => 'rw', |
19 | isa => 'Moose::Meta::TypeConstraint', |
20 | required => 1, |
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21 | ); |
22 | |
23 | before 'process_options_for_provides' => sub { |
24 | my ($self, $options) = @_; |
25 | |
26 | if (exists $options->{isa}) { |
27 | my $type = $options->{isa}; |
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28 | |
29 | # ... we should check if the type exists already |
30 | # and then we should use it,.. however, this means |
31 | # we need to extract the container type constraint |
32 | # as well, which is a little trickier |
33 | |
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34 | if ($type =~ /^(.*)\[(.*)\]$/) { |
35 | my $core_type = $1; |
36 | my $container_type = $2; |
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37 | |
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38 | $options->{container_type} = $container_type; |
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39 | |
40 | my $container_type_constraint = find_type_constraint($container_type); |
41 | |
42 | # NOTE: |
43 | # I am not sure DWIM-ery is a good thing |
44 | # here, so i am going to err on the side |
45 | # of caution, and blow up if you have |
46 | # not made a type constraint for this yet. |
47 | # - SL |
48 | (defined $container_type_constraint) |
49 | || confess "You must predefine the '$container_type' constraint before you can use it as a container type"; |
50 | |
51 | $options->{container_type_constraint} = $container_type_constraint; |
52 | |
53 | if ($core_type eq 'ArrayRef') { |
54 | $options->{isa} = subtype('ArrayRef' => where { |
55 | foreach my $x (@$_) { ($container_type_constraint->check($x)) || return } 1; |
56 | }); |
57 | } |
58 | elsif ($core_type eq 'HashRef') { |
59 | $options->{isa} = subtype('HashRef' => where { |
60 | foreach my $x (values %$_) { ($container_type_constraint->check($x)) || return } 1; |
61 | }); |
62 | } |
63 | else { |
64 | confess "Your isa must be either ArrayRef or HashRef (sorry no subtype support yet)"; |
65 | } |
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66 | } |
67 | } |
68 | }; |
69 | |
70 | no Moose; |
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71 | no Moose::Util::TypeConstraints; |
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72 | |
73 | 1; |
74 | |
75 | __END__ |
76 | |
77 | =pod |
78 | |
79 | =head1 NAME |
80 | |
81 | =head1 SYNOPSIS |
82 | |
83 | =head1 DESCRIPTION |
84 | |
85 | =head1 METHODS |
86 | |
87 | =head1 BUGS |
88 | |
89 | All complex software has bugs lurking in it, and this module is no |
90 | exception. If you find a bug please either email me, or add the bug |
91 | to cpan-RT. |
92 | |
93 | =head1 AUTHOR |
94 | |
95 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
96 | |
97 | =head1 COPYRIGHT AND LICENSE |
98 | |
99 | Copyright 2007 by Infinity Interactive, Inc. |
100 | |
101 | L<http://www.iinteractive.com> |
102 | |
103 | This library is free software; you can redistribute it and/or modify |
104 | it under the same terms as Perl itself. |
105 | |
106 | =cut |