Commit | Line | Data |
c0e30cf5 |
1 | |
2 | package Moose::Meta::Class; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
6ba6d68c |
7 | use Carp 'confess'; |
8 | use Scalar::Util 'weaken'; |
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9 | |
0e3def6b |
10 | our $VERSION = '0.02'; |
bc1e29b5 |
11 | |
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12 | use base 'Class::MOP::Class'; |
13 | |
a15dff8d |
14 | sub construct_instance { |
15 | my ($class, %params) = @_; |
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16 | my $instance = $params{'__INSTANCE__'} || {}; |
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17 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
18 | my $init_arg = $attr->init_arg(); |
19 | # try to fetch the init arg from the %params ... |
20 | my $val; |
21 | $val = $params{$init_arg} if exists $params{$init_arg}; |
22 | # if nothing was in the %params, we can use the |
23 | # attribute's default value (if it has one) |
24 | $val ||= $attr->default($instance) if $attr->has_default; |
00867c44 |
25 | if (defined $val) { |
00867c44 |
26 | if ($attr->has_type_constraint) { |
34a66aa3 |
27 | if ($attr->should_coerce && $attr->type_constraint->has_coercion) { |
a27aa600 |
28 | $val = $attr->type_constraint->coercion->coerce($val); |
7415b2cb |
29 | } |
a27aa600 |
30 | (defined($attr->type_constraint->check($val))) |
66811d63 |
31 | || confess "Attribute (" . $attr->name . ") does not pass the type contraint with '$val'"; |
00867c44 |
32 | } |
a15dff8d |
33 | } |
34 | $instance->{$attr->name} = $val; |
6ba6d68c |
35 | if (defined $val && $attr->is_weak_ref) { |
36 | weaken($instance->{$attr->name}); |
37 | } |
a15dff8d |
38 | } |
39 | return $instance; |
40 | } |
41 | |
c0e30cf5 |
42 | 1; |
43 | |
44 | __END__ |
45 | |
46 | =pod |
47 | |
48 | =head1 NAME |
49 | |
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50 | Moose::Meta::Class - The Moose metaclass |
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51 | |
c0e30cf5 |
52 | =head1 DESCRIPTION |
53 | |
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54 | This is a subclass of L<Class::MOP::Class> with Moose specific |
55 | extensions. |
56 | |
6ba6d68c |
57 | For the most part, the only time you will ever encounter an |
58 | instance of this class is if you are doing some serious deep |
59 | introspection. To really understand this class, you need to refer |
60 | to the L<Class::MOP::Class> documentation. |
61 | |
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62 | =head1 METHODS |
63 | |
64 | =over 4 |
65 | |
a15dff8d |
66 | =item B<construct_instance> |
67 | |
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68 | This provides some Moose specific extensions to this method, you |
69 | almost never call this method directly unless you really know what |
70 | you are doing. |
71 | |
72 | This method makes sure to handle the moose weak-ref, type-constraint |
73 | and type coercion features. |
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74 | |
c0e30cf5 |
75 | =back |
76 | |
77 | =head1 BUGS |
78 | |
79 | All complex software has bugs lurking in it, and this module is no |
80 | exception. If you find a bug please either email me, or add the bug |
81 | to cpan-RT. |
82 | |
c0e30cf5 |
83 | =head1 AUTHOR |
84 | |
85 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
86 | |
87 | =head1 COPYRIGHT AND LICENSE |
88 | |
89 | Copyright 2006 by Infinity Interactive, Inc. |
90 | |
91 | L<http://www.iinteractive.com> |
92 | |
93 | This library is free software; you can redistribute it and/or modify |
94 | it under the same terms as Perl itself. |
95 | |
96 | =cut |