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1 | #!/usr/bin/env perl |
2 | package Mouse::Object; |
3 | use strict; |
4 | use warnings; |
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5 | |
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6 | use Mouse::Util qw/weaken/; |
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7 | use Carp 'confess'; |
8 | |
9 | sub new { |
10 | my $class = shift; |
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11 | |
12 | my $args = $class->BUILDARGS(@_); |
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13 | |
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14 | my $instance = bless {}, $class; |
15 | |
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16 | for my $attribute ($class->meta->compute_all_applicable_attributes) { |
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17 | my $from = $attribute->init_arg; |
18 | my $key = $attribute->name; |
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19 | my $default; |
20 | |
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21 | if (defined($from) && exists($args->{$from})) { |
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22 | $args->{$from} = $attribute->coerce_constraint($args->{$from}) |
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23 | if $attribute->should_coerce; |
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24 | $attribute->verify_type_constraint($args->{$from}) |
25 | if $attribute->has_type_constraint; |
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26 | |
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27 | $instance->{$key} = $args->{$from}; |
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28 | |
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29 | weaken($instance->{$key}) |
30 | if ref($instance->{$key}) && $attribute->is_weak_ref; |
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31 | |
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32 | if ($attribute->has_trigger) { |
33 | $attribute->trigger->($instance, $args->{$from}, $attribute); |
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34 | } |
35 | } |
36 | else { |
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37 | if ($attribute->has_default || $attribute->has_builder) { |
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38 | unless ($attribute->is_lazy) { |
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39 | my $default = $attribute->default; |
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40 | my $builder = $attribute->builder; |
41 | my $value = $attribute->has_builder |
42 | ? $instance->$builder |
43 | : ref($default) eq 'CODE' |
44 | ? $default->() |
45 | : $default; |
46 | |
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47 | $value = $attribute->coerce_constraint($value) |
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48 | if $attribute->should_coerce; |
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49 | $attribute->verify_type_constraint($value) |
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50 | if $attribute->has_type_constraint; |
51 | |
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52 | $instance->{$key} = $value; |
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53 | |
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54 | weaken($instance->{$key}) |
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55 | if ref($instance->{$key}) && $attribute->is_weak_ref; |
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56 | } |
57 | } |
58 | else { |
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59 | if ($attribute->is_required) { |
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60 | confess "Attribute (".$attribute->name.") is required"; |
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61 | } |
62 | } |
63 | } |
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64 | } |
65 | |
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66 | $instance->BUILDALL($args); |
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67 | |
68 | return $instance; |
69 | } |
70 | |
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71 | sub BUILDARGS { |
72 | my $class = shift; |
73 | |
74 | if (scalar @_ == 1) { |
75 | if (defined $_[0]) { |
76 | (ref($_[0]) eq 'HASH') |
77 | || confess "Single parameters to new() must be a HASH ref"; |
78 | return {%{$_[0]}}; |
79 | } else { |
80 | return {}; |
81 | } |
82 | } |
83 | else { |
84 | return {@_}; |
85 | } |
86 | } |
87 | |
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88 | sub DESTROY { shift->DEMOLISHALL } |
89 | |
90 | sub BUILDALL { |
91 | my $self = shift; |
92 | |
93 | # short circuit |
94 | return unless $self->can('BUILD'); |
95 | |
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96 | for my $class (reverse $self->meta->linearized_isa) { |
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97 | no strict 'refs'; |
98 | no warnings 'once'; |
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99 | my $code = *{ $class . '::BUILD' }{CODE} |
100 | or next; |
101 | $code->($self, @_); |
102 | } |
103 | } |
104 | |
105 | sub DEMOLISHALL { |
106 | my $self = shift; |
107 | |
108 | # short circuit |
109 | return unless $self->can('DEMOLISH'); |
110 | |
111 | no strict 'refs'; |
112 | |
113 | for my $class ($self->meta->linearized_isa) { |
114 | my $code = *{ $class . '::DEMOLISH' }{CODE} |
115 | or next; |
116 | $code->($self, @_); |
117 | } |
118 | } |
119 | |
120 | 1; |
121 | |
122 | __END__ |
123 | |
124 | =head1 NAME |
125 | |
126 | Mouse::Object - we don't need to steenkin' constructor |
127 | |
128 | =head1 METHODS |
129 | |
130 | =head2 new arguments -> object |
131 | |
132 | Instantiates a new Mouse::Object. This is obviously intended for subclasses. |
133 | |
134 | =head2 BUILDALL \%args |
135 | |
136 | Calls L</BUILD> on each class in the class hierarchy. This is called at the |
137 | end of L</new>. |
138 | |
139 | =head2 BUILD \%args |
140 | |
141 | You may put any business logic initialization in BUILD methods. You don't |
142 | need to redispatch or return any specific value. |
143 | |
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144 | =head2 BUILDARGS |
145 | |
146 | Lets you override the arguments that C<new> takes. Return a hashref of |
147 | parameters. |
148 | |
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149 | =head2 DEMOLISHALL |
150 | |
151 | Calls L</DEMOLISH> on each class in the class hierarchy. This is called at |
152 | L</DESTROY> time. |
153 | |
154 | =head2 DEMOLISH |
155 | |
156 | You may put any business logic deinitialization in DEMOLISH methods. You don't |
157 | need to redispatch or return any specific value. |
158 | |
159 | =cut |
160 | |