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1 | package MooseX::ClassAttribute::Trait::Attribute; |
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2 | |
3 | use strict; |
4 | use warnings; |
5 | |
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6 | use namespace::autoclean; |
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7 | use Moose::Role; |
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8 | |
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9 | # This is the worst role evar! Really, this should be a subclass, |
10 | # because it overrides a lot of behavior. However, as a subclass it |
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11 | # won't cooperate with _other_ subclasses. |
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12 | |
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13 | around _process_options => sub { |
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14 | my $orig = shift; |
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15 | my $class = shift; |
16 | my $name = shift; |
17 | my $options = shift; |
18 | |
19 | confess 'A class attribute cannot be required' |
20 | if $options->{required}; |
21 | |
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22 | return $class->$orig( $name, $options ); |
23 | }; |
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24 | |
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25 | after attach_to_class => sub { |
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26 | my $self = shift; |
27 | my $meta = shift; |
28 | |
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29 | $self->_initialize($meta) |
30 | unless $self->is_lazy(); |
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31 | }; |
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32 | |
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33 | before detach_from_class => sub { |
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34 | my $self = shift; |
35 | my $meta = shift; |
36 | |
37 | $self->clear_value($meta); |
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38 | }; |
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39 | |
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40 | sub _initialize { |
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41 | my $self = shift; |
42 | my $metaclass = shift; |
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43 | |
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44 | if ( $self->has_default() ) { |
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45 | $self->set_value( undef, |
46 | $self->default( $self->associated_class() ) ); |
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47 | } |
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48 | elsif ( $self->has_builder() ) { |
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49 | $self->set_value( undef, $self->_call_builder( $metaclass->name() ) ); |
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50 | } |
51 | } |
52 | |
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53 | around default => sub { |
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54 | my $orig = shift; |
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55 | my $self = shift; |
56 | |
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57 | my $default = $self->$orig(); |
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58 | |
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59 | if ( $self->is_default_a_coderef() && @_ ) { |
60 | return $default->(@_); |
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61 | } |
62 | |
63 | return $default; |
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64 | }; |
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65 | |
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66 | around _call_builder => sub { |
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67 | shift; |
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68 | my $self = shift; |
69 | my $class = shift; |
70 | |
71 | my $builder = $self->builder(); |
72 | |
73 | return $class->$builder() |
74 | if $class->can( $self->builder ); |
75 | |
76 | confess( "$class does not support builder method '" |
77 | . $self->builder |
78 | . "' for attribute '" |
79 | . $self->name |
80 | . "'" ); |
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81 | }; |
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82 | |
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83 | around set_value => sub { |
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84 | shift; |
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85 | my $self = shift; |
86 | shift; # ignoring instance or class name |
87 | my $value = shift; |
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88 | |
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89 | $self->associated_class() |
90 | ->set_class_attribute_value( $self->name() => $value ); |
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91 | }; |
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92 | |
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93 | around get_value => sub { |
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94 | shift; |
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95 | my $self = shift; |
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96 | |
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97 | return $self->associated_class() |
98 | ->get_class_attribute_value( $self->name() ); |
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99 | }; |
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100 | |
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101 | around has_value => sub { |
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102 | shift; |
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103 | my $self = shift; |
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104 | |
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105 | return $self->associated_class() |
106 | ->has_class_attribute_value( $self->name() ); |
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107 | }; |
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108 | |
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109 | around clear_value => sub { |
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110 | shift; |
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111 | my $self = shift; |
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112 | |
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113 | return $self->associated_class() |
114 | ->clear_class_attribute_value( $self->name() ); |
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115 | }; |
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116 | |
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117 | if ( $Moose::VERSION < 1.99 ) { |
118 | around inline_get => sub { |
119 | shift; |
120 | my $self = shift; |
121 | |
122 | return $self->associated_class() |
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123 | ->_inline_get_class_slot_value( $self->slots() ); |
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124 | }; |
125 | |
126 | around inline_set => sub { |
127 | shift; |
128 | my $self = shift; |
129 | shift; |
130 | my $value = shift; |
131 | |
132 | my $meta = $self->associated_class(); |
133 | |
134 | my $code |
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135 | = $meta->_inline_set_class_slot_value( $self->slots(), $value ) |
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136 | . ";"; |
137 | $code |
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138 | .= $meta->_inline_weaken_class_slot_value( $self->slots(), $value ) |
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139 | . " if ref $value;" |
140 | if $self->is_weak_ref(); |
141 | |
142 | return $code; |
143 | }; |
144 | |
145 | around inline_has => sub { |
146 | shift; |
147 | my $self = shift; |
148 | |
149 | return $self->associated_class() |
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150 | ->_inline_is_class_slot_initialized( $self->slots() ); |
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151 | }; |
152 | |
153 | around inline_clear => sub { |
154 | shift; |
155 | my $self = shift; |
156 | |
157 | return $self->associated_class() |
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158 | ->_inline_deinitialize_class_slot( $self->slots() ); |
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159 | }; |
160 | } |
161 | else { |
162 | around _inline_instance_get => sub { |
163 | shift; |
164 | my $self = shift; |
165 | |
166 | return $self->associated_class() |
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167 | ->_inline_get_class_slot_value( $self->slots() ); |
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168 | }; |
169 | |
170 | around _inline_instance_set => sub { |
171 | shift; |
172 | my $self = shift; |
173 | shift; |
174 | my $value = shift; |
175 | |
176 | return $self->associated_class() |
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177 | ->_inline_set_class_slot_value( $self->slots(), $value ); |
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178 | }; |
179 | |
180 | around _inline_instance_has => sub { |
181 | shift; |
182 | my $self = shift; |
183 | |
184 | return $self->associated_class() |
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185 | ->_inline_is_class_slot_initialized( $self->slots() ); |
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186 | }; |
187 | |
188 | around _inline_instance_clear => sub { |
189 | shift; |
190 | my $self = shift; |
191 | |
192 | return $self->associated_class() |
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193 | ->_inline_deinitialize_class_slot( $self->slots() ); |
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194 | }; |
195 | |
196 | around _inline_weaken_value => sub { |
197 | shift; |
198 | my $self = shift; |
199 | shift; |
200 | my $value = shift; |
201 | |
202 | return unless $self->is_weak_ref(); |
203 | |
204 | return ( |
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205 | $self->associated_class->_inline_weaken_class_slot_value( |
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206 | $self->slots(), $value |
207 | ), |
208 | 'if ref ' . $value . ';', |
209 | ); |
210 | }; |
211 | } |
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212 | |
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213 | 1; |
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214 | |
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215 | # ABSTRACT: A trait for class attributes |
216 | |
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217 | __END__ |
218 | |
219 | =pod |
220 | |
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221 | =head1 DESCRIPTION |
222 | |
223 | This role modifies the behavior of class attributes in various |
224 | ways. It really should be a subclass of C<Moose::Meta::Attribute>, but |
225 | if it were then it couldn't be combined with other attribute |
226 | metaclasses, like C<MooseX::AttributeHelpers>. |
227 | |
228 | There are no new public methods implemented by this role. All it does |
229 | is change the behavior of a number of existing methods. |
230 | |
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231 | =head1 BUGS |
232 | |
233 | See L<MooseX::ClassAttribute> for details. |
234 | |
7a4a3b1e |
235 | =cut |