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1 | #!/usr/bin/env perl |
2 | package Mouse::Object; |
3 | use strict; |
4 | use warnings; |
5 | use MRO::Compat; |
6 | |
7 | use Scalar::Util 'blessed'; |
8 | use Carp 'confess'; |
9 | |
10 | sub new { |
11 | my $class = shift; |
12 | my %args = @_; |
13 | my $instance = bless {}, $class; |
14 | |
15 | for my $attribute ($class->meta->attributes) { |
16 | my $key = $attribute->init_arg; |
17 | my $default; |
18 | |
19 | if (!exists($args{$key})) { |
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20 | if (exists($attribute->{default}) || exists($attribute->{builder})) { |
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21 | unless ($attribute->{lazy}) { |
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22 | my $builder = $attribute->{builder}; |
23 | my $default = exists($attribute->{builder}) |
24 | ? $instance->$builder |
25 | : ref($attribute->{default}) eq 'CODE' |
26 | ? $attribute->{default}->() |
27 | : $attribute->{default}; |
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28 | |
29 | $attribute->verify_type_constraint($default) |
30 | if $attribute->has_type_constraint; |
31 | |
32 | $instance->{$key} = $default; |
33 | |
34 | Scalar::Util::weaken($instance->{$key}) |
35 | if $attribute->{weak_ref}; |
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36 | } |
37 | } |
38 | else { |
39 | if ($attribute->{required}) { |
40 | confess "Attribute '$attribute->{name}' is required"; |
41 | } |
42 | } |
43 | } |
44 | |
45 | if (exists($args{$key})) { |
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46 | $attribute->verify_type_constraint($args{$key}) |
47 | if $attribute->has_type_constraint; |
48 | |
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49 | $instance->{$key} = $args{$key}; |
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50 | |
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51 | Scalar::Util::weaken($instance->{$key}) |
52 | if $attribute->{weak_ref}; |
53 | |
54 | if ($attribute->{trigger}) { |
55 | $attribute->{trigger}->($instance, $args{$key}, $attribute); |
56 | } |
57 | } |
58 | } |
59 | |
60 | $instance->BUILDALL(\%args); |
61 | |
62 | return $instance; |
63 | } |
64 | |
65 | sub DESTROY { shift->DEMOLISHALL } |
66 | |
67 | sub BUILDALL { |
68 | my $self = shift; |
69 | |
70 | # short circuit |
71 | return unless $self->can('BUILD'); |
72 | |
73 | no strict 'refs'; |
74 | |
75 | for my $class ($self->meta->linearized_isa) { |
76 | my $code = *{ $class . '::BUILD' }{CODE} |
77 | or next; |
78 | $code->($self, @_); |
79 | } |
80 | } |
81 | |
82 | sub DEMOLISHALL { |
83 | my $self = shift; |
84 | |
85 | # short circuit |
86 | return unless $self->can('DEMOLISH'); |
87 | |
88 | no strict 'refs'; |
89 | |
90 | for my $class ($self->meta->linearized_isa) { |
91 | my $code = *{ $class . '::DEMOLISH' }{CODE} |
92 | or next; |
93 | $code->($self, @_); |
94 | } |
95 | } |
96 | |
97 | 1; |
98 | |
99 | __END__ |
100 | |
101 | =head1 NAME |
102 | |
103 | Mouse::Object - we don't need to steenkin' constructor |
104 | |
105 | =head1 METHODS |
106 | |
107 | =head2 new arguments -> object |
108 | |
109 | Instantiates a new Mouse::Object. This is obviously intended for subclasses. |
110 | |
111 | =head2 BUILDALL \%args |
112 | |
113 | Calls L</BUILD> on each class in the class hierarchy. This is called at the |
114 | end of L</new>. |
115 | |
116 | =head2 BUILD \%args |
117 | |
118 | You may put any business logic initialization in BUILD methods. You don't |
119 | need to redispatch or return any specific value. |
120 | |
121 | =head2 DEMOLISHALL |
122 | |
123 | Calls L</DEMOLISH> on each class in the class hierarchy. This is called at |
124 | L</DESTROY> time. |
125 | |
126 | =head2 DEMOLISH |
127 | |
128 | You may put any business logic deinitialization in DEMOLISH methods. You don't |
129 | need to redispatch or return any specific value. |
130 | |
131 | =cut |
132 | |