Commit | Line | Data |
c0e30cf5 |
1 | |
2 | package Moose::Meta::Class; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
6ba6d68c |
7 | use Carp 'confess'; |
a7d0cd00 |
8 | use Scalar::Util 'weaken', 'blessed'; |
a15dff8d |
9 | |
78cd1d3b |
10 | our $VERSION = '0.04'; |
bc1e29b5 |
11 | |
c0e30cf5 |
12 | use base 'Class::MOP::Class'; |
13 | |
a15dff8d |
14 | sub construct_instance { |
15 | my ($class, %params) = @_; |
e522431d |
16 | my $instance = $params{'__INSTANCE__'} || {}; |
a15dff8d |
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; |
ca01a97b |
21 | if (exists $params{$init_arg}) { |
22 | $val = $params{$init_arg}; |
23 | } |
24 | else { |
25 | # skip it if it's lazy |
26 | next if $attr->is_lazy; |
27 | # and die if it is required |
28 | confess "Attribute (" . $attr->name . ") is required" |
29 | if $attr->is_required |
30 | } |
a15dff8d |
31 | # if nothing was in the %params, we can use the |
32 | # attribute's default value (if it has one) |
8339fae2 |
33 | if (!defined $val && $attr->has_default) { |
34 | $val = $attr->default($instance); |
35 | } |
00867c44 |
36 | if (defined $val) { |
00867c44 |
37 | if ($attr->has_type_constraint) { |
34a66aa3 |
38 | if ($attr->should_coerce && $attr->type_constraint->has_coercion) { |
a27aa600 |
39 | $val = $attr->type_constraint->coercion->coerce($val); |
7415b2cb |
40 | } |
a27aa600 |
41 | (defined($attr->type_constraint->check($val))) |
66811d63 |
42 | || confess "Attribute (" . $attr->name . ") does not pass the type contraint with '$val'"; |
00867c44 |
43 | } |
a15dff8d |
44 | } |
45 | $instance->{$attr->name} = $val; |
6ba6d68c |
46 | if (defined $val && $attr->is_weak_ref) { |
47 | weaken($instance->{$attr->name}); |
48 | } |
a15dff8d |
49 | } |
50 | return $instance; |
51 | } |
52 | |
a7d0cd00 |
53 | sub has_method { |
54 | my ($self, $method_name) = @_; |
55 | (defined $method_name && $method_name) |
56 | || confess "You must define a method name"; |
57 | |
58 | my $sub_name = ($self->name . '::' . $method_name); |
59 | |
60 | no strict 'refs'; |
61 | return 0 if !defined(&{$sub_name}); |
62 | my $method = \&{$sub_name}; |
63 | |
64 | return 1 if blessed($method) && $method->isa('Moose::Meta::Role::Method'); |
65 | return $self->SUPER::has_method($method_name); |
66 | } |
67 | |
68 | |
78cd1d3b |
69 | sub add_override_method_modifier { |
70 | my ($self, $name, $method, $_super_package) = @_; |
71 | # need this for roles ... |
72 | $_super_package ||= $self->name; |
73 | my $super = $self->find_next_method_by_name($name); |
74 | (defined $super) |
75 | || confess "You cannot override '$name' because it has no super method"; |
76 | $self->add_method($name => sub { |
77 | my @args = @_; |
78 | no strict 'refs'; |
79 | no warnings 'redefine'; |
80 | local *{$_super_package . '::super'} = sub { $super->(@args) }; |
81 | return $method->(@args); |
82 | }); |
83 | } |
84 | |
85 | sub add_augment_method_modifier { |
86 | my ($self, $name, $method) = @_; |
87 | my $super = $self->find_next_method_by_name($name); |
88 | (defined $super) |
89 | || confess "You cannot augment '$name' because it has no super method"; |
90 | $self->add_method($name => sub { |
91 | my @args = @_; |
92 | no strict 'refs'; |
93 | no warnings 'redefine'; |
94 | local *{$super->package_name . '::inner'} = sub { $method->(@args) }; |
95 | return $super->(@args); |
96 | }); |
97 | } |
98 | |
c0e30cf5 |
99 | 1; |
100 | |
101 | __END__ |
102 | |
103 | =pod |
104 | |
105 | =head1 NAME |
106 | |
e522431d |
107 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
108 | |
c0e30cf5 |
109 | =head1 DESCRIPTION |
110 | |
e522431d |
111 | This is a subclass of L<Class::MOP::Class> with Moose specific |
112 | extensions. |
113 | |
6ba6d68c |
114 | For the most part, the only time you will ever encounter an |
115 | instance of this class is if you are doing some serious deep |
116 | introspection. To really understand this class, you need to refer |
117 | to the L<Class::MOP::Class> documentation. |
118 | |
c0e30cf5 |
119 | =head1 METHODS |
120 | |
121 | =over 4 |
122 | |
a15dff8d |
123 | =item B<construct_instance> |
124 | |
6ba6d68c |
125 | This provides some Moose specific extensions to this method, you |
126 | almost never call this method directly unless you really know what |
127 | you are doing. |
128 | |
129 | This method makes sure to handle the moose weak-ref, type-constraint |
130 | and type coercion features. |
ef1d5f4b |
131 | |
e9ec68d6 |
132 | =item B<has_method ($name)> |
133 | |
134 | This accomidates Moose::Meta::Role::Method instances, which are |
135 | aliased, instead of added, but still need to be counted as valid |
136 | methods. |
137 | |
78cd1d3b |
138 | =item B<add_override_method_modifier ($name, $method)> |
139 | |
140 | =item B<add_augment_method_modifier ($name, $method)> |
141 | |
c0e30cf5 |
142 | =back |
143 | |
144 | =head1 BUGS |
145 | |
146 | All complex software has bugs lurking in it, and this module is no |
147 | exception. If you find a bug please either email me, or add the bug |
148 | to cpan-RT. |
149 | |
c0e30cf5 |
150 | =head1 AUTHOR |
151 | |
152 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
153 | |
154 | =head1 COPYRIGHT AND LICENSE |
155 | |
156 | Copyright 2006 by Infinity Interactive, Inc. |
157 | |
158 | L<http://www.iinteractive.com> |
159 | |
160 | This library is free software; you can redistribute it and/or modify |
161 | it under the same terms as Perl itself. |
162 | |
163 | =cut |