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1 | |
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2 | package Moose::Meta::Attribute::Native::Trait; |
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3 | use Moose::Role; |
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4 | |
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5 | use List::MoreUtils qw( any uniq ); |
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6 | use Moose::Util::TypeConstraints; |
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7 | use Moose::Deprecated; |
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8 | |
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9 | our $VERSION = '1.20'; |
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10 | $VERSION = eval $VERSION; |
11 | our $AUTHORITY = 'cpan:STEVAN'; |
12 | |
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13 | requires '_helper_type'; |
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14 | |
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15 | has _used_default_is => ( |
16 | is => 'rw', |
17 | isa => 'Bool', |
18 | default => 0, |
19 | ); |
20 | |
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21 | before '_process_options' => sub { |
22 | my ( $self, $name, $options ) = @_; |
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23 | |
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24 | $self->_check_helper_type( $options, $name ); |
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25 | |
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26 | if ( !( any { exists $options->{$_} } qw( is reader writer accessor ) ) |
27 | && $self->can('_default_is') ) { |
28 | |
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29 | $options->{is} = $self->_default_is; |
30 | |
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31 | $options->{_used_default_is} = 1; |
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32 | } |
33 | |
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34 | if ( |
35 | !( |
36 | $options->{required} |
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37 | || any { exists $options->{$_} } qw( default builder lazy_build ) |
3cf2f9ec |
38 | ) |
39 | && $self->can('_default_default') |
40 | ) { |
41 | |
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42 | $options->{default} = $self->_default_default; |
43 | |
44 | Moose::Deprecated::deprecated( |
45 | feature => 'default default for Native Trait', |
46 | message => |
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47 | 'Allowing a native trait to automatically supply a default is deprecated.' |
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48 | . ' You can avoid this warning by supplying a default, builder, or making the attribute required' |
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49 | ); |
50 | } |
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51 | }; |
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52 | |
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53 | after 'install_accessors' => sub { |
54 | my $self = shift; |
55 | |
56 | return unless $self->_used_default_is; |
57 | |
58 | my @methods |
59 | = $self->_default_is eq 'rw' |
60 | ? qw( reader writer accessor ) |
61 | : 'reader'; |
62 | |
63 | my $name = $self->name; |
64 | my $class = $self->associated_class->name; |
65 | |
66 | for my $meth ( uniq grep {defined} map { $self->$_ } @methods ) { |
67 | |
68 | my $message |
69 | = "The $meth method in the $class class was automatically created" |
70 | . " by the native delegation trait for the $name attribute." |
71 | . q{ This "default is" feature is deprecated.} |
72 | . q{ Explicitly set "is" or define accessor names to avoid this}; |
73 | |
74 | $self->associated_class->add_before_method_modifier( |
75 | $meth => sub { |
76 | Moose::Deprecated::deprecated( |
77 | feature => 'default is for Native Trait', |
78 | message =>$message, |
79 | ); |
80 | } |
81 | ); |
82 | } |
83 | }; |
84 | |
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85 | sub _check_helper_type { |
86 | my ( $self, $options, $name ) = @_; |
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87 | |
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88 | my $type = $self->_helper_type; |
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89 | |
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90 | $options->{isa} = $type |
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91 | unless exists $options->{isa}; |
92 | |
93 | my $isa = Moose::Util::TypeConstraints::find_or_create_type_constraint( |
94 | $options->{isa} ); |
95 | |
96 | ( $isa->is_a_type_of($type) ) |
97 | || confess |
98 | "The type constraint for $name must be a subtype of $type but it's a $isa"; |
99 | } |
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100 | |
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101 | before 'install_accessors' => sub { (shift)->_check_handles_values }; |
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102 | |
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103 | sub _check_handles_values { |
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104 | my $self = shift; |
105 | |
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106 | my %handles = $self->_canonicalize_handles; |
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107 | |
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108 | for my $original_method ( values %handles ) { |
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109 | my $name = $original_method->[0]; |
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110 | |
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111 | my $accessor_class = $self->_native_accessor_class_for($name); |
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112 | |
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113 | ( $accessor_class && $accessor_class->can('new') ) |
114 | || confess |
115 | "$name is an unsupported method type - $accessor_class"; |
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116 | } |
5404f169 |
117 | } |
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118 | |
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119 | around '_canonicalize_handles' => sub { |
120 | shift; |
121 | my $self = shift; |
122 | my $handles = $self->handles; |
123 | |
124 | return unless $handles; |
125 | |
126 | unless ( 'HASH' eq ref $handles ) { |
127 | $self->throw_error( |
128 | "The 'handles' option must be a HASH reference, not $handles"); |
129 | } |
130 | |
131 | return map { |
132 | my $to = $handles->{$_}; |
133 | $to = [$to] unless ref $to; |
134 | $_ => $to |
135 | } keys %$handles; |
136 | }; |
137 | |
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138 | around '_make_delegation_method' => sub { |
139 | my $next = shift; |
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140 | my ( $self, $handle_name, $method_to_call ) = @_; |
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141 | |
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142 | my ( $name, @curried_args ) = @$method_to_call; |
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143 | |
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144 | my $accessor_class = $self->_native_accessor_class_for($name); |
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145 | |
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146 | die "Cannot find an accessor class for $name" |
147 | unless $accessor_class && $accessor_class->can('new'); |
148 | |
149 | return $accessor_class->new( |
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150 | name => $handle_name, |
151 | package_name => $self->associated_class->name, |
152 | delegate_to_method => $name, |
153 | attribute => $self, |
154 | is_inline => 1, |
155 | curried_arguments => \@curried_args, |
156 | root_types => [ $self->_root_types ], |
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157 | ); |
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158 | }; |
159 | |
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160 | sub _root_types { |
161 | return $_[0]->_helper_type; |
162 | } |
163 | |
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164 | sub _native_accessor_class_for { |
165 | my ( $self, $suffix ) = @_; |
166 | |
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167 | my $role |
168 | = 'Moose::Meta::Method::Accessor::Native::' |
169 | . $self->_native_type . '::' |
170 | . $suffix; |
171 | |
172 | return Moose::Meta::Class->create_anon_class( |
173 | superclasses => |
174 | [ $self->accessor_metaclass, $self->delegation_metaclass ], |
175 | roles => [$role], |
176 | cache => 1, |
177 | )->name; |
f7fd22b6 |
178 | } |
179 | |
15715245 |
180 | sub _build_native_type { |
181 | my $self = shift; |
182 | |
183 | for my $role_name ( map { $_->name } $self->meta->calculate_all_roles ) { |
184 | return $1 if $role_name =~ /::Native::Trait::(\w+)$/; |
185 | } |
186 | |
187 | die "Cannot calculate native type for " . ref $self; |
188 | } |
189 | |
190 | has '_native_type' => ( |
191 | is => 'ro', |
192 | isa => 'Str', |
193 | lazy => 1, |
194 | builder => '_build_native_type', |
195 | ); |
196 | |
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197 | no Moose::Role; |
198 | no Moose::Util::TypeConstraints; |
199 | |
200 | 1; |
201 | |
202 | __END__ |
203 | |
204 | =head1 NAME |
205 | |
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206 | Moose::Meta::Attribute::Native::Trait - Shared role for native delegation traits |
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207 | |
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208 | =head1 BUGS |
209 | |
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210 | See L<Moose/BUGS> for details on reporting bugs. |
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211 | |
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212 | =head1 SEE ALSO |
213 | |
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214 | Documentation for Moose native traits can be found in |
215 | L<Moose::Meta::Attribute::Native>. |
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216 | |
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217 | =head1 AUTHORS |
218 | |
219 | Yuval Kogman |
220 | |
221 | Shawn M Moore |
222 | |
223 | Jesse Luehrs |
224 | |
225 | =head1 COPYRIGHT AND LICENSE |
226 | |
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227 | Copyright 2007-2010 by Infinity Interactive, Inc. |
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228 | |
229 | L<http://www.iinteractive.com> |
230 | |
231 | This library is free software; you can redistribute it and/or modify |
232 | it under the same terms as Perl itself. |
233 | |
234 | =cut |