-#!/usr/bin/env perl
package Mouse::Meta::Class;
use strict;
use warnings;
-use Scalar::Util 'blessed';
-use Carp 'confess';
+use Mouse::Meta::Method::Constructor;
+use Mouse::Meta::Method::Destructor;
+use Scalar::Util qw/blessed weaken/;
+use Mouse::Util qw/get_linear_isa not_supported/;
-use MRO::Compat;
+use base qw(Mouse::Meta::Module);
-do {
- my %METACLASS_CACHE;
+sub method_metaclass(){ 'Mouse::Meta::Method' } # required for get_method()
- # because Mouse doesn't introspect existing classes, we're forced to
- # only pay attention to other Mouse classes
- sub _metaclass_cache {
- my $class = shift;
- my $name = shift;
- return $METACLASS_CACHE{$name};
- }
-
- sub initialize {
- my $class = shift;
- my $name = shift;
- $METACLASS_CACHE{$name} = $class->new(name => $name)
- if !exists($METACLASS_CACHE{$name});
- return $METACLASS_CACHE{$name};
- }
-};
+sub _new {
+ my($class, %args) = @_;
-sub new {
- my $class = shift;
- my %args = @_;
+ $args{attributes} ||= {};
+ $args{methods} ||= {};
+ $args{roles} ||= [];
- $args{attributes} = {};
$args{superclasses} = do {
no strict 'refs';
- \@{ $args{name} . '::ISA' };
+ \@{ $args{package} . '::ISA' };
};
bless \%args, $class;
}
-sub name { $_[0]->{name} }
+sub roles { $_[0]->{roles} }
sub superclasses {
my $self = shift;
@{ $self->{superclasses} };
}
-sub add_method {
+sub get_all_method_names {
my $self = shift;
- my $name = shift;
- my $code = shift;
-
- my $pkg = $self->name;
-
- no strict 'refs';
- *{ $pkg . '::' . $name } = $code;
+ my %uniq;
+ return grep { $uniq{$_}++ == 0 }
+ map { Mouse::Meta::Class->initialize($_)->get_method_list() }
+ $self->linearized_isa;
}
sub add_attribute {
my $self = shift;
- my $attr = shift;
- $self->{'attributes'}{$attr->name} = $attr;
+ if (@_ == 1 && blessed($_[0])) {
+ my $attr = shift @_;
+ $self->{'attributes'}{$attr->name} = $attr;
+ } else {
+ my $names = shift @_;
+ $names = [$names] if !ref($names);
+ my $metaclass = 'Mouse::Meta::Attribute';
+ my %options = @_;
+
+ if ( my $metaclass_name = delete $options{metaclass} ) {
+ my $new_class = Mouse::Util::resolve_metaclass_alias(
+ 'Attribute',
+ $metaclass_name
+ );
+ if ( $metaclass ne $new_class ) {
+ $metaclass = $new_class;
+ }
+ }
+
+ for my $name (@$names) {
+ if ($name =~ s/^\+//) {
+ $metaclass->clone_parent($self, $name, @_);
+ }
+ else {
+ $metaclass->create($self, $name, @_);
+ }
+ }
+ }
}
-sub compute_all_applicable_attributes {
+sub compute_all_applicable_attributes { shift->get_all_attributes(@_) }
+sub get_all_attributes {
my $self = shift;
my (@attr, %seen);
return @attr;
}
-sub get_attribute_map { $_[0]->{attributes} }
-sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
-sub get_attribute { $_[0]->{attributes}->{$_[1]} }
+sub linearized_isa { @{ get_linear_isa($_[0]->name) } }
+
+sub new_object {
+ my $self = shift;
+ my $args = (@_ == 1) ? $_[0] : { @_ };
-sub linearized_isa { @{ mro::get_linear_isa($_[0]->name) } }
+ my $instance = bless {}, $self->name;
+
+ foreach my $attribute ($self->get_all_attributes) {
+ my $from = $attribute->init_arg;
+ my $key = $attribute->name;
+
+ if (defined($from) && exists($args->{$from})) {
+ $args->{$from} = $attribute->coerce_constraint($args->{$from})
+ if $attribute->should_coerce;
+ $attribute->verify_against_type_constraint($args->{$from});
+
+ $instance->{$key} = $args->{$from};
+
+ weaken($instance->{$key})
+ if ref($instance->{$key}) && $attribute->is_weak_ref;
+
+ if ($attribute->has_trigger) {
+ $attribute->trigger->($instance, $args->{$from});
+ }
+ }
+ else {
+ if ($attribute->has_default || $attribute->has_builder) {
+ unless ($attribute->is_lazy) {
+ my $default = $attribute->default;
+ my $builder = $attribute->builder;
+ my $value = $attribute->has_builder
+ ? $instance->$builder
+ : ref($default) eq 'CODE'
+ ? $default->($instance)
+ : $default;
+
+ $value = $attribute->coerce_constraint($value)
+ if $attribute->should_coerce;
+ $attribute->verify_against_type_constraint($value);
+
+ $instance->{$key} = $value;
+
+ weaken($instance->{$key})
+ if ref($instance->{$key}) && $attribute->is_weak_ref;
+ }
+ }
+ else {
+ if ($attribute->is_required) {
+ $self->throw_error("Attribute (".$attribute->name.") is required");
+ }
+ }
+ }
+ }
+ return $instance;
+}
sub clone_object {
my $class = shift;
my $instance = shift;
(blessed($instance) && $instance->isa($class->name))
- || confess "You must pass an instance of the metaclass (" . $class->name . "), not ($instance)";
+ || $class->throw_error("You must pass an instance of the metaclass (" . $class->name . "), not ($instance)");
$class->clone_instance($instance, @_);
}
my ($class, $instance, %params) = @_;
(blessed($instance))
- || confess "You can only clone instances, ($instance) is not a blessed instance";
+ || $class->throw_error("You can only clone instances, ($instance) is not a blessed instance");
my $clone = bless { %$instance }, ref $instance;
- foreach my $attr ($class->compute_all_applicable_attributes()) {
+ foreach my $attr ($class->get_all_attributes()) {
if ( defined( my $init_arg = $attr->init_arg ) ) {
if (exists $params{$init_arg}) {
$clone->{ $attr->name } = $params{$init_arg};
}
-sub make_immutable {}
+sub make_immutable {
+ my $self = shift;
+ my %args = (
+ inline_constructor => 1,
+ inline_destructor => 1,
+ @_,
+ );
+
+ $self->{is_immutable}++;
+
+ if ($args{inline_constructor}) {
+ $self->add_method('new' => Mouse::Meta::Method::Constructor->generate_constructor_method_inline( $self ));
+ }
+
+ if ($args{inline_destructor}) {
+ $self->add_method('DESTROY' => Mouse::Meta::Method::Destructor->generate_destructor_method_inline( $self ));
+ }
+
+ # Moose's make_immutable returns true allowing calling code to skip setting an explicit true value
+ # at the end of a source file.
+ return 1;
+}
+
+sub make_mutable { not_supported }
+
+sub is_immutable { $_[0]->{is_immutable} }
+sub is_mutable { !$_[0]->{is_immutable} }
+
+sub _install_modifier {
+ my ( $self, $into, $type, $name, $code ) = @_;
+
+ # which is modifer class available?
+ my $modifier_class = do {
+ if (eval "require Class::Method::Modifiers::Fast; 1") {
+ 'Class::Method::Modifiers::Fast';
+ } elsif (eval "require Class::Method::Modifiers; 1") {
+ 'Class::Method::Modifiers';
+ } else {
+ Carp::croak("Method modifiers require the use of Class::Method::Modifiers or Class::Method::Modifiers::Fast. Please install it from CPAN and file a bug report with this application.");
+ }
+ };
+ my $modifier = $modifier_class->can('_install_modifier');
+
+ # replace this method itself :)
+ {
+ no warnings 'redefine';
+ *_install_modifier = sub {
+ my ( $self, $into, $type, $name, $code ) = @_;
+ $modifier->(
+ $into,
+ $type,
+ $name,
+ $code
+ );
+ $self->{methods}{$name}++; # register it to the method map
+ return;
+ };
+ }
+
+ # call me. for first time.
+ $self->_install_modifier( $into, $type, $name, $code );
+}
+
+sub add_before_method_modifier {
+ my ( $self, $name, $code ) = @_;
+ $self->_install_modifier( $self->name, 'before', $name, $code );
+}
+
+sub add_around_method_modifier {
+ my ( $self, $name, $code ) = @_;
+ $self->_install_modifier( $self->name, 'around', $name, $code );
+}
+
+sub add_after_method_modifier {
+ my ( $self, $name, $code ) = @_;
+ $self->_install_modifier( $self->name, 'after', $name, $code );
+}
+
+sub add_override_method_modifier {
+ my ($self, $name, $code) = @_;
+
+ my $package = $self->name;
+
+ my $body = $package->can($name)
+ or $self->throw_error("You cannot override '$name' because it has no super method");
+
+ $self->add_method($name => sub { $code->($package, $body, @_) });
+}
+
+sub does_role {
+ my ($self, $role_name) = @_;
+
+ (defined $role_name)
+ || $self->throw_error("You must supply a role name to look for");
+
+ for my $class ($self->linearized_isa) {
+ my $meta = Mouse::Meta::Module::class_of($class);
+ next unless $meta && $meta->can('roles');
+
+ for my $role (@{ $meta->roles }) {
+
+ return 1 if $role->does_role($role_name);
+ }
+ }
+
+ return 0;
+}
+
+sub create {
+ my ($class, $package_name, %options) = @_;
+
+ (ref $options{superclasses} eq 'ARRAY')
+ || $class->throw_error("You must pass an ARRAY ref of superclasses")
+ if exists $options{superclasses};
+
+ (ref $options{attributes} eq 'ARRAY')
+ || $class->throw_error("You must pass an ARRAY ref of attributes")
+ if exists $options{attributes};
+
+ (ref $options{methods} eq 'HASH')
+ || $class->throw_error("You must pass a HASH ref of methods")
+ if exists $options{methods};
+
+ (ref $options{roles} eq 'ARRAY')
+ || $class->throw_error("You must pass an ARRAY ref of roles")
+ if exists $options{roles};
+
+ # instantiate a module
+ {
+ ( defined $package_name && $package_name )
+ || $class->throw_error("You must pass a package name");
+
+ no strict 'refs';
+ ${ $package_name . '::VERSION' } = $options{version} if exists $options{version};
+ ${ $package_name . '::AUTHORITY' } = $options{authority} if exists $options{authority};
+ }
+
+ my %initialize_options = %options;
+ delete @initialize_options{qw(
+ package
+ superclasses
+ attributes
+ methods
+ roles
+ version
+ authority
+ )};
+ my $meta = $class->initialize( $package_name => %initialize_options );
+
+ # FIXME totally lame
+ $meta->add_method('meta' => sub {
+ Mouse::Meta::Class->initialize(ref($_[0]) || $_[0]);
+ });
+
+ $meta->superclasses(@{$options{superclasses}})
+ if exists $options{superclasses};
+
+ # NOTE:
+ # process attributes first, so that they can
+ # install accessors, but locally defined methods
+ # can then overwrite them. It is maybe a little odd, but
+ # I think this should be the order of things.
+ if (exists $options{attributes}) {
+ foreach my $attr (@{$options{attributes}}) {
+ Mouse::Meta::Attribute->create($meta, $attr->{name}, %$attr);
+ }
+ }
+ if (exists $options{methods}) {
+ foreach my $method_name (keys %{$options{methods}}) {
+ $meta->add_method($method_name, $options{methods}->{$method_name});
+ }
+ }
+ if (exists $options{roles}){
+ Mouse::Util::apply_all_roles($package_name, @{$options{roles}});
+ }
+ return $meta;
+}
+
+{
+ my $ANON_CLASS_SERIAL = 0;
+ my $ANON_CLASS_PREFIX = 'Mouse::Meta::Class::__ANON__::SERIAL::';
+
+ my %IMMORTAL_ANON_CLASSES;
+ sub create_anon_class {
+ my ( $class, %options ) = @_;
+
+ my $cache = $options{cache};
+ my $cache_key;
+
+ if($cache){ # anonymous but not mortal
+ # something like Super::Class|Super::Class::2=Role|Role::1\r
+ $cache_key = join '=' => (\r
+ join('|', @{$options{superclasses} || []}),\r
+ join('|', sort @{$options{roles} || []}),\r
+ );
+ return $IMMORTAL_ANON_CLASSES{$cache_key} if exists $IMMORTAL_ANON_CLASSES{$cache_key};
+ }
+ my $package_name = $ANON_CLASS_PREFIX . ++$ANON_CLASS_SERIAL;
+ my $meta = $class->create( $package_name, anon_class_id => $ANON_CLASS_SERIAL, %options );
+
+ if($cache){
+ $IMMORTAL_ANON_CLASSES{$cache_key} = $meta;
+ }
+ else{
+ Mouse::Meta::Module::weaken_metaclass($package_name);
+ }
+ return $meta;
+ }
+
+ sub is_anon_class{
+ return exists $_[0]->{anon_class_id};
+ }
+
+
+ sub DESTROY{
+ my($self) = @_;
+
+ my $serial_id = $self->{anon_class_id};
+
+ return if !$serial_id;
+
+ my $stash = $self->namespace;
+
+ @{$self->{sperclasses}} = ();
+ %{$stash} = ();
+ Mouse::Meta::Module::remove_metaclass_by_name($self->name);
+
+ no strict 'refs';
+ delete ${$ANON_CLASS_PREFIX}{ $serial_id . '::' };
+
+ return;
+ }
+
+}
1;
Gets (or sets) the list of superclasses of the owner class.
-=head2 add_attribute Mouse::Meta::Attribute
+=head2 add_attribute (Mouse::Meta::Attribute| name => spec)
Begins keeping track of the existing L<Mouse::Meta::Attribute> for the owner
class.
-=head2 compute_all_applicable_attributes -> (Mouse::Meta::Attribute)
+=head2 get_all_attributes -> (Mouse::Meta::Attribute)
Returns the list of all L<Mouse::Meta::Attribute> instances associated with
this class and its superclasses.
Returns a mapping of attribute names to their corresponding
L<Mouse::Meta::Attribute> objects.
-=head2 has_attribute Name -> Boool
+=head2 get_attribute_list -> { name => Mouse::Meta::Attribute }
+
+This returns a list of attribute names which are defined in the local
+class. If you want a list of all applicable attributes for a class,
+use the C<get_all_attributes> method.
+
+=head2 has_attribute Name -> Bool
Returns whether we have a L<Mouse::Meta::Attribute> with the given name.
=head2 clone_instance Instance, Parameters -> Instance
-Clones the given C<Instance> and sets any additional parameters.
+The clone_instance method has been made private.
+The public version is deprecated.
=cut
projects / gitmo/Mouse.git / blobdiff