Commit | Line | Data |
a2227e71 |
1 | package Mouse::Meta::Role; |
2 | use strict; |
3 | use warnings; |
74be9f76 |
4 | |
fce211ae |
5 | use Mouse::Util qw(not_supported); |
3a63a2e7 |
6 | use base qw(Mouse::Meta::Module); |
a2227e71 |
7 | |
3a63a2e7 |
8 | sub _new { |
acf0f643 |
9 | my $class = shift; |
10 | my %args = @_; |
11 | |
3a63a2e7 |
12 | $args{methods} ||= {}; |
59089ec3 |
13 | $args{attributes} ||= {}; |
14 | $args{required_methods} ||= []; |
47f36c05 |
15 | $args{roles} ||= []; |
274b6cce |
16 | |
acf0f643 |
17 | bless \%args, $class; |
18 | } |
a2227e71 |
19 | |
afc73948 |
20 | sub get_roles { $_[0]->{roles} } |
21 | |
22 | |
59089ec3 |
23 | sub add_required_methods { |
24 | my $self = shift; |
25 | my @methods = @_; |
26 | push @{$self->{required_methods}}, @methods; |
27 | } |
28 | |
274b6cce |
29 | sub add_attribute { |
30 | my $self = shift; |
31 | my $name = shift; |
69ac1dcf |
32 | my $spec = shift; |
9c85e9dc |
33 | $self->{attributes}->{$name} = $spec; |
da0c885d |
34 | } |
35 | |
3a63a2e7 |
36 | sub _check_required_methods{ |
37 | my($role, $class, $args, @other_roles) = @_; |
38 | |
39 | if($class->isa('Mouse::Meta::Class')){ |
40 | my $class_name = $class->name; |
41 | foreach my $method_name(@{$role->{required_methods}}){ |
42 | unless($class_name->can($method_name)){ |
43 | my $role_name = $role->name; |
44 | my $has_method = 0; |
45 | |
46 | foreach my $another_role_spec(@other_roles){ |
47 | my $another_role_name = $another_role_spec->[0]; |
48 | if($role_name ne $another_role_name && $another_role_name->can($method_name)){ |
49 | $has_method = 1; |
50 | last; |
51 | } |
52 | } |
53 | |
fce211ae |
54 | $role->throw_error("'$role_name' requires the method '$method_name' to be implemented by '$class_name'") |
3a63a2e7 |
55 | unless $has_method; |
56 | } |
57 | } |
58 | } |
2e92bb89 |
59 | |
3a63a2e7 |
60 | return; |
2e92bb89 |
61 | } |
62 | |
3a63a2e7 |
63 | sub _apply_methods{ |
64 | my($role, $class, $args) = @_; |
da0c885d |
65 | |
3a63a2e7 |
66 | my $role_name = $role->name; |
67 | my $class_name = $class->name; |
68 | my $alias = $args->{alias}; |
e0b163e1 |
69 | |
3a63a2e7 |
70 | foreach my $method_name($role->get_method_list){ |
71 | next if $method_name eq 'meta'; |
72 | |
73 | my $code = $role_name->can($method_name); |
74 | if(do{ no strict 'refs'; defined &{$class_name . '::' . $method_name} }){ |
75 | # XXX what's Moose's behavior? |
76 | } |
77 | else{ |
78 | $class->add_method($method_name => $code); |
2e92bb89 |
79 | } |
2e92bb89 |
80 | |
3a63a2e7 |
81 | if($alias && $alias->{$method_name}){ |
82 | my $dstname = $alias->{$method_name}; |
83 | if(do{ no strict 'refs'; defined &{$class_name . '::' . $dstname} }){ |
84 | # XXX wat's Moose's behavior? |
21498b08 |
85 | } |
3a63a2e7 |
86 | else{ |
87 | $class->add_method($dstname => $code); |
2e92bb89 |
88 | } |
59089ec3 |
89 | } |
90 | } |
91 | |
3a63a2e7 |
92 | return; |
93 | } |
94 | |
95 | sub _apply_attributes{ |
96 | my($role, $class, $args) = @_; |
97 | |
b1b81553 |
98 | if ($class->isa('Mouse::Meta::Class')) { |
99 | # apply role to class |
3a63a2e7 |
100 | for my $attr_name ($role->get_attribute_list) { |
101 | next if $class->has_attribute($attr_name); |
102 | |
103 | my $spec = $role->get_attribute($attr_name); |
05b9dc92 |
104 | |
3a63a2e7 |
105 | my $attr_metaclass = 'Mouse::Meta::Attribute'; |
05b9dc92 |
106 | if ( my $metaclass_name = $spec->{metaclass} ) { |
3a63a2e7 |
107 | $attr_metaclass = Mouse::Util::resolve_metaclass_alias( |
05b9dc92 |
108 | 'Attribute', |
109 | $metaclass_name |
110 | ); |
05b9dc92 |
111 | } |
112 | |
3a63a2e7 |
113 | $attr_metaclass->create($class, $attr_name => %$spec); |
b1b81553 |
114 | } |
115 | } else { |
116 | # apply role to role |
3a63a2e7 |
117 | for my $attr_name ($role->get_attribute_list) { |
118 | next if $class->has_attribute($attr_name); |
119 | |
120 | my $spec = $role->get_attribute($attr_name); |
121 | $class->add_attribute($attr_name => $spec); |
b1b81553 |
122 | } |
da0c885d |
123 | } |
d99db7b6 |
124 | |
3a63a2e7 |
125 | return; |
126 | } |
127 | |
128 | sub _apply_modifiers{ |
129 | my($role, $class, $args) = @_; |
130 | |
67199842 |
131 | for my $modifier_type (qw/before after around override/) { |
3a63a2e7 |
132 | my $add_modifier = "add_${modifier_type}_method_modifier"; |
133 | my $modifiers = $role->{"${modifier_type}_method_modifiers"}; |
d99db7b6 |
134 | |
3a63a2e7 |
135 | while(my($method_name, $modifier_codes) = each %{$modifiers}){ |
136 | foreach my $code(@{$modifier_codes}){ |
137 | $class->$add_modifier($method_name => $code); |
d99db7b6 |
138 | } |
139 | } |
140 | } |
3a63a2e7 |
141 | return; |
da0c885d |
142 | } |
0fc8adbc |
143 | |
3a63a2e7 |
144 | sub _append_roles{ |
145 | my($role, $class, $args) = @_; |
21498b08 |
146 | |
3a63a2e7 |
147 | my $roles = $class->isa('Mouse::Meta::Class') ? $class->roles : $class->get_roles; |
148 | |
149 | foreach my $r($role, @{$role->get_roles}){ |
150 | if(!$class->does_role($r->name)){ |
151 | push @{$roles}, $r; |
21498b08 |
152 | } |
153 | } |
3a63a2e7 |
154 | return; |
155 | } |
21498b08 |
156 | |
3a63a2e7 |
157 | # Moose uses Application::ToInstance, Application::ToClass, Application::ToRole |
158 | sub apply { |
159 | my($self, $class, %args) = @_; |
160 | |
161 | if ($class->isa('Mouse::Object')) { |
fce211ae |
162 | not_supported 'Application::ToInstance'; |
21498b08 |
163 | } |
164 | |
3a63a2e7 |
165 | $self->_check_required_methods($class, \%args); |
166 | $self->_apply_methods($class, \%args); |
167 | $self->_apply_attributes($class, \%args); |
168 | $self->_apply_modifiers($class, \%args); |
169 | $self->_append_roles($class, \%args); |
170 | return; |
171 | } |
21498b08 |
172 | |
3a63a2e7 |
173 | sub combine_apply { |
174 | my(undef, $class, @roles) = @_; |
05b9dc92 |
175 | |
3a63a2e7 |
176 | foreach my $role_spec (@roles) { |
177 | my($role_name, $args) = @{$role_spec}; |
21498b08 |
178 | |
3a63a2e7 |
179 | my $role = $role_name->meta; |
21498b08 |
180 | |
3a63a2e7 |
181 | $role->_check_required_methods($class, $args, @roles); |
182 | $role->_apply_methods($class, $args); |
183 | $role->_apply_attributes($class, $args); |
184 | $role->_apply_modifiers($class, $args); |
185 | $role->_append_roles($class, $args); |
21498b08 |
186 | } |
3a63a2e7 |
187 | return; |
21498b08 |
188 | } |
189 | |
67199842 |
190 | for my $modifier_type (qw/before after around override/) { |
3a63a2e7 |
191 | |
192 | my $modifier = "${modifier_type}_method_modifiers"; |
193 | my $add_method_modifier = sub { |
fc0e0bbd |
194 | my ($self, $method_name, $method) = @_; |
195 | |
3a63a2e7 |
196 | push @{ $self->{$modifier}->{$method_name} ||= [] }, $method; |
197 | return; |
fc0e0bbd |
198 | }; |
3370794f |
199 | my $has_method_modifiers = sub{ |
200 | my($self, $method_name) = @_; |
201 | my $m = $self->{$modifier}->{$method_name}; |
202 | return $m && @{$m} != 0; |
203 | }; |
3a63a2e7 |
204 | my $get_method_modifiers = sub { |
205 | my ($self, $method_name) = @_; |
206 | return @{ $self->{$modifier}->{$method_name} ||= [] } |
c2f128e7 |
207 | }; |
c2f128e7 |
208 | |
3a63a2e7 |
209 | no strict 'refs'; |
210 | *{ 'add_' . $modifier_type . '_method_modifier' } = $add_method_modifier; |
3370794f |
211 | *{ 'has_' . $modifier_type . '_method_modifiers' } = $has_method_modifiers; |
3a63a2e7 |
212 | *{ 'get_' . $modifier_type . '_method_modifiers' } = $get_method_modifiers; |
213 | } |
47f36c05 |
214 | |
67199842 |
215 | # This is currently not passing all the Moose tests. |
216 | sub does_role { |
217 | my ($self, $role_name) = @_; |
218 | |
219 | (defined $role_name) |
fce211ae |
220 | || $self->throw_error("You must supply a role name to look for"); |
67199842 |
221 | |
222 | # if we are it,.. then return true |
223 | return 1 if $role_name eq $self->name; |
3a63a2e7 |
224 | # otherwise.. check our children |
225 | for my $role (@{ $self->get_roles }) { |
67199842 |
226 | return 1 if $role->does_role($role_name); |
227 | } |
228 | return 0; |
229 | } |
230 | |
231 | |
a2227e71 |
232 | 1; |
233 | |