2 package Moose::Meta::Class;
10 use Scalar::Util 'weaken', 'blessed';
12 our $VERSION = '0.05';
14 use base 'Class::MOP::Class';
16 __PACKAGE__->meta->add_attribute('roles' => (
24 $class->SUPER::initialize($pkg,
25 ':attribute_metaclass' => 'Moose::Meta::Attribute',
26 ':instance_metaclass' => 'Moose::Meta::Instance',
31 my ($self, $role) = @_;
32 (blessed($role) && $role->isa('Moose::Meta::Role'))
33 || confess "Roles must be instances of Moose::Meta::Role";
34 push @{$self->roles} => $role;
38 my ($self, $role_name) = @_;
40 || confess "You must supply a role name to look for";
41 foreach my $role (@{$self->roles}) {
42 return 1 if $role->does_role($role_name);
48 my ($class, %params) = @_;
49 my $self = $class->SUPER::new_object(%params);
50 foreach my $attr ($class->compute_all_applicable_attributes()) {
51 next unless $params{$attr->init_arg} && $attr->can('has_trigger') && $attr->has_trigger;
52 $attr->trigger->($self, $params{$attr->init_arg}, $attr);
57 sub construct_instance {
58 my ($class, %params) = @_;
59 my $meta_instance = $class->get_meta_instance;
60 my $instance = $params{'__INSTANCE__'} || $meta_instance->create_instance();
61 foreach my $attr ($class->compute_all_applicable_attributes()) {
62 $attr->initialize_instance_slot($meta_instance, $instance, \%params)
68 my ($self, $method_name) = @_;
69 (defined $method_name && $method_name)
70 || confess "You must define a method name";
72 my $sub_name = ($self->name . '::' . $method_name);
75 return 0 if !defined(&{$sub_name});
76 my $method = \&{$sub_name};
78 return 1 if blessed($method) && $method->isa('Moose::Meta::Role::Method');
79 return $self->SUPER::has_method($method_name);
83 sub add_override_method_modifier {
84 my ($self, $name, $method, $_super_package) = @_;
85 # need this for roles ...
86 $_super_package ||= $self->name;
87 my $super = $self->find_next_method_by_name($name);
89 || confess "You cannot override '$name' because it has no super method";
90 $self->add_method($name => bless sub {
93 no warnings 'redefine';
94 local *{$_super_package . '::super'} = sub { $super->(@args) };
95 return $method->(@args);
96 } => 'Moose::Meta::Method::Overriden');
99 sub add_augment_method_modifier {
100 my ($self, $name, $method) = @_;
101 my $super = $self->find_next_method_by_name($name);
103 || confess "You cannot augment '$name' because it has no super method";
104 my $_super_package = $super->package_name;
105 # BUT!,... if this is an overriden method ....
106 if ($super->isa('Moose::Meta::Method::Overriden')) {
107 # we need to be sure that we actually
108 # find the next method, which is not
109 # an 'override' method, the reason is
110 # that an 'override' method will not
111 # be the one calling inner()
112 my $real_super = $self->_find_next_method_by_name_which_is_not_overridden($name);
113 $_super_package = $real_super->package_name;
115 $self->add_method($name => sub {
118 no warnings 'redefine';
119 local *{$_super_package . '::inner'} = sub { $method->(@args) };
120 return $super->(@args);
124 sub _find_next_method_by_name_which_is_not_overridden {
125 my ($self, $name) = @_;
126 my @methods = $self->find_all_methods_by_name($name);
127 foreach my $method (@methods) {
128 return $method->{code}
129 if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overriden');
134 package Moose::Meta::Method::Overriden;
139 our $VERSION = '0.01';
141 use base 'Class::MOP::Method';
151 Moose::Meta::Class - The Moose metaclass
155 This is a subclass of L<Class::MOP::Class> with Moose specific
158 For the most part, the only time you will ever encounter an
159 instance of this class is if you are doing some serious deep
160 introspection. To really understand this class, you need to refer
161 to the L<Class::MOP::Class> documentation.
171 We override this method to support the C<trigger> attribute option.
173 =item B<construct_instance>
175 This provides some Moose specific extensions to this method, you
176 almost never call this method directly unless you really know what
179 This method makes sure to handle the moose weak-ref, type-constraint
180 and type coercion features.
182 =item B<has_method ($name)>
184 This accomidates Moose::Meta::Role::Method instances, which are
185 aliased, instead of added, but still need to be counted as valid
188 =item B<add_override_method_modifier ($name, $method)>
190 This will create an C<override> method modifier for you, and install
193 =item B<add_augment_method_modifier ($name, $method)>
195 This will create an C<augment> method modifier for you, and install
200 This will return an array of C<Moose::Meta::Role> instances which are
201 attached to this class.
203 =item B<add_role ($role)>
205 This takes an instance of C<Moose::Meta::Role> in C<$role>, and adds it
206 to the list of associated roles.
208 =item B<does_role ($role_name)>
210 This will test if this class C<does> a given C<$role_name>. It will
211 not only check it's local roles, but ask them as well in order to
212 cascade down the role hierarchy.
218 All complex software has bugs lurking in it, and this module is no
219 exception. If you find a bug please either email me, or add the bug
224 Stevan Little E<lt>stevan@iinteractive.comE<gt>
226 =head1 COPYRIGHT AND LICENSE
228 Copyright 2006 by Infinity Interactive, Inc.
230 L<http://www.iinteractive.com>
232 This library is free software; you can redistribute it and/or modify
233 it under the same terms as Perl itself.