use Class::MOP::Method::Wrapped;
use Carp 'confess';
-use Scalar::Util 'blessed', 'reftype', 'weaken';
+use Scalar::Util 'blessed', 'weaken';
-our $VERSION = '0.31';
+our $VERSION = '0.65';
our $AUTHORITY = 'cpan:STEVAN';
use base 'Class::MOP::Module';
# Creation
sub initialize {
- my $class = shift;
- my $package_name = shift;
- (defined $package_name && $package_name && !blessed($package_name))
- || confess "You must pass a package name and it cannot be blessed";
- if (defined(my $meta = Class::MOP::get_metaclass_by_name($package_name))) {
- return $meta;
+ my $class = shift;
+
+ my $package_name;
+
+ if ( @_ % 2 ) {
+ $package_name = shift;
+ } else {
+ my %options = @_;
+ $package_name = $options{package};
}
- $class->construct_class_instance('package' => $package_name, @_);
+
+ (defined $package_name && $package_name && !ref($package_name))
+ || confess "You must pass a package name and it cannot be blessed";
+
+ return Class::MOP::get_metaclass_by_name($package_name)
+ || $class->construct_class_instance(package => $package_name, @_);
}
sub reinitialize {
no strict 'refs';
$meta = bless {
# inherited from Class::MOP::Package
- '$!package' => $package_name,
+ 'package' => $package_name,
# NOTE:
# since the following attributes will
# listed here for reference, because they
# should not actually have a value associated
# with the slot.
- '%!namespace' => \undef,
+ 'namespace' => \undef,
# inherited from Class::MOP::Module
- '$!version' => \undef,
- '$!authority' => \undef,
+ 'version' => \undef,
+ 'authority' => \undef,
# defined in Class::MOP::Class
- '@!superclasses' => \undef,
+ 'superclasses' => \undef,
- '%!methods' => {},
- '%!attributes' => {},
- '$!attribute_metaclass' => $options{'attribute_metaclass'} || 'Class::MOP::Attribute',
- '$!method_metaclass' => $options{'method_metaclass'} || 'Class::MOP::Method',
- '$!instance_metaclass' => $options{'instance_metaclass'} || 'Class::MOP::Instance',
+ 'methods' => {},
+ 'attributes' => {},
+ 'attribute_metaclass' => $options{'attribute_metaclass'} || 'Class::MOP::Attribute',
+ 'method_metaclass' => $options{'method_metaclass'} || 'Class::MOP::Method',
+ 'instance_metaclass' => $options{'instance_metaclass'} || 'Class::MOP::Instance',
## uber-private variables
# NOTE:
# we can tell the first time the
# methods are fetched
# - SL
- '$!_package_cache_flag' => undef,
+ '_package_cache_flag' => undef,
+ '_meta_instance' => undef,
} => $class;
}
else {
$meta;
}
-sub reset_package_cache_flag { (shift)->{'$!_package_cache_flag'} = undef }
+sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef }
sub update_package_cache_flag {
my $self = shift;
# NOTE:
# to our cache as well. This avoids us
# having to regenerate the method_map.
# - SL
- $self->{'$!_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name);
+ $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name);
}
sub check_metaclass_compatability {
return $class->create($package_name, %options);
}
+ BEGIN {
+ local $@;
+ eval {
+ require Devel::GlobalDestruction;
+ Devel::GlobalDestruction->import("in_global_destruction");
+ 1;
+ } or *in_global_destruction = sub () { '' };
+ }
+
# NOTE:
# this will only get called for
# anon-classes, all other calls
# really need to be handled explicitly
sub DESTROY {
my $self = shift;
+
+ return if in_global_destruction; # it'll happen soon anyway and this just makes things more complicated
+
no warnings 'uninitialized';
return unless $self->name =~ /^$ANON_CLASS_PREFIX/;
my ($serial_id) = ($self->name =~ /^$ANON_CLASS_PREFIX(\d+)/);
# creating classes with MOP ...
sub create {
- my $class = shift;
- my $package_name = shift;
+ my ( $class, @args ) = @_;
- (defined $package_name && $package_name)
- || confess "You must pass a package name";
+ unshift @args, 'package' if @args % 2 == 1;
- (scalar @_ % 2 == 0)
- || confess "You much pass all parameters as name => value pairs " .
- "(I found an uneven number of params in \@_)";
+ my (%options) = @args;
+ my $package_name = $options{package};
- my (%options) = @_;
+ (defined $package_name && $package_name)
+ || confess "You must pass a package name";
(ref $options{superclasses} eq 'ARRAY')
|| confess "You must pass an ARRAY ref of superclasses"
my $meta = $class->initialize($package_name);
+ # FIXME totally lame
$meta->add_method('meta' => sub {
$class->initialize(blessed($_[0]) || $_[0]);
});
# all these attribute readers will be bootstrapped
# away in the Class::MOP bootstrap section
-sub get_attribute_map { $_[0]->{'%!attributes'} }
-sub attribute_metaclass { $_[0]->{'$!attribute_metaclass'} }
-sub method_metaclass { $_[0]->{'$!method_metaclass'} }
-sub instance_metaclass { $_[0]->{'$!instance_metaclass'} }
+sub get_attribute_map { $_[0]->{'attributes'} }
+sub attribute_metaclass { $_[0]->{'attribute_metaclass'} }
+sub method_metaclass { $_[0]->{'method_metaclass'} }
+sub instance_metaclass { $_[0]->{'instance_metaclass'} }
# FIXME:
# this is a prime canidate for conversion to XS
sub get_method_map {
my $self = shift;
- if (defined $self->{'$!_package_cache_flag'} &&
- $self->{'$!_package_cache_flag'} == Class::MOP::check_package_cache_flag($self->name)) {
- return $self->{'%!methods'};
+ my $current = Class::MOP::check_package_cache_flag($self->name);
+
+ if (defined $self->{'_package_cache_flag'} && $self->{'_package_cache_flag'} == $current) {
+ return $self->{'methods'};
}
-
- my $map = $self->{'%!methods'};
+
+ $self->{_package_cache_flag} = $current;
+
+ my $map = $self->{'methods'};
my $class_name = $self->name;
my $method_metaclass = $self->method_metaclass;
- foreach my $symbol ($self->list_all_package_symbols('CODE')) {
- my $code = $self->get_package_symbol('&' . $symbol);
+ my %all_code = $self->get_all_package_symbols('CODE');
+
+ foreach my $symbol (keys %all_code) {
+ my $code = $all_code{$symbol};
next if exists $map->{$symbol} &&
defined $map->{$symbol} &&
my ($pkg, $name) = Class::MOP::get_code_info($code);
- next if ($pkg || '') ne $class_name ||
- (($name || '') ne '__ANON__' && ($pkg || '') ne $class_name);
+ # NOTE:
+ # in 5.10 constant.pm the constants show up
+ # as being in the right package, but in pre-5.10
+ # they show up as constant::__ANON__ so we
+ # make an exception here to be sure that things
+ # work as expected in both.
+ # - SL
+ unless ($pkg eq 'constant' && $name eq '__ANON__') {
+ next if ($pkg || '') ne $class_name ||
+ (($name || '') ne '__ANON__' && ($pkg || '') ne $class_name);
+ }
$map->{$symbol} = $method_metaclass->wrap(
$code,
sub new_object {
my $class = shift;
+
# NOTE:
# we need to protect the integrity of the
# Class::MOP::Class singletons here, so we
# NOTE:
# this will only work for a HASH instance type
if ($class->is_anon_class) {
- (reftype($instance) eq 'HASH')
+ (Scalar::Util::reftype($instance) eq 'HASH')
|| confess "Currently only HASH based instances are supported with instance of anon-classes";
# NOTE:
# At some point we should make this official
return $instance;
}
+
sub get_meta_instance {
- my $class = shift;
- return $class->instance_metaclass->new(
- $class,
- $class->compute_all_applicable_attributes()
+ my $self = shift;
+ $self->{'_meta_instance'} ||= $self->create_meta_instance();
+}
+
+sub create_meta_instance {
+ my $self = shift;
+
+ my $instance = $self->instance_metaclass->new(
+ associated_metaclass => $self,
+ attributes => [ $self->compute_all_applicable_attributes() ],
);
+
+ $self->add_meta_instance_dependencies()
+ if $instance->is_dependent_on_superclasses();
+
+ return $instance;
}
sub clone_object {
my $class = shift;
my $instance = shift;
(blessed($instance) && $instance->isa($class->name))
- || confess "You must pass an instance ($instance) of the metaclass (" . $class->name . ")";
+ || confess "You must pass an instance of the metaclass (" . $class->name . "), not ($instance)";
+
# NOTE:
# we need to protect the integrity of the
# Class::MOP::Class singletons here, they
sub clone_instance {
my ($class, $instance, %params) = @_;
(blessed($instance))
- || confess "You can only clone instances, \$self is not a blessed instance";
+ || confess "You can only clone instances, ($instance) is not a blessed instance";
my $meta_instance = $class->get_meta_instance();
my $clone = $meta_instance->clone_instance($instance);
foreach my $attr ($class->compute_all_applicable_attributes()) {
# Inheritance
sub superclasses {
- my $self = shift;
+ my $self = shift;
+ my $var_spec = { sigil => '@', type => 'ARRAY', name => 'ISA' };
if (@_) {
my @supers = @_;
- @{$self->get_package_symbol('@ISA')} = @supers;
+ @{$self->get_package_symbol($var_spec)} = @supers;
# NOTE:
# we need to check the metaclass
# compatibility here so that we can
# not potentially creating an issues
# we don't know about
$self->check_metaclass_compatability();
+ $self->update_meta_instance_dependencies();
}
- @{$self->get_package_symbol('@ISA')};
+ @{$self->get_package_symbol($var_spec)};
}
sub subclasses {
my $self = shift;
my $super_class = $self->name;
- my @derived_classes;
-
- my $find_derived_classes;
- $find_derived_classes = sub {
- my ($outer_class) = @_;
- my $symbol_table_hashref = do { no strict 'refs'; \%{"${outer_class}::"} };
+ if ( Class::MOP::HAVE_ISAREV() ) {
+ return @{ $super_class->mro::get_isarev() };
+ } else {
+ my @derived_classes;
- SYMBOL:
- for my $symbol ( keys %$symbol_table_hashref ) {
- next SYMBOL if $symbol !~ /\A (\w+):: \z/x;
- my $inner_class = $1;
+ my $find_derived_classes;
+ $find_derived_classes = sub {
+ my ($outer_class) = @_;
- next SYMBOL if $inner_class eq 'SUPER'; # skip '*::SUPER'
+ my $symbol_table_hashref = do { no strict 'refs'; \%{"${outer_class}::"} };
- my $class =
- $outer_class
- ? "${outer_class}::$inner_class"
- : $inner_class;
+ SYMBOL:
+ for my $symbol ( keys %$symbol_table_hashref ) {
+ next SYMBOL if $symbol !~ /\A (\w+):: \z/x;
+ my $inner_class = $1;
- if ( $class->isa($super_class) and $class ne $super_class ) {
- push @derived_classes, $class;
- }
+ next SYMBOL if $inner_class eq 'SUPER'; # skip '*::SUPER'
- next SYMBOL if $class eq 'main'; # skip 'main::*'
+ my $class =
+ $outer_class
+ ? "${outer_class}::$inner_class"
+ : $inner_class;
- $find_derived_classes->($class);
- }
- };
+ if ( $class->isa($super_class) and $class ne $super_class ) {
+ push @derived_classes, $class;
+ }
- my $root_class = q{};
- $find_derived_classes->($root_class);
+ next SYMBOL if $class eq 'main'; # skip 'main::*'
- undef $find_derived_classes;
+ $find_derived_classes->($class);
+ }
+ };
- @derived_classes = sort { $a->isa($b) ? 1 : $b->isa($a) ? -1 : 0 } @derived_classes;
+ my $root_class = q{};
+ $find_derived_classes->($root_class);
- return @derived_classes;
+ undef $find_derived_classes;
+
+ @derived_classes = sort { $a->isa($b) ? 1 : $b->isa($a) ? -1 : 0 } @derived_classes;
+
+ return @derived_classes;
+ }
}
$body = $method->body;
if ($method->package_name ne $self->name &&
$method->name ne $method_name) {
- warn "Hello there, got somethig for you."
+ warn "Hello there, got something for you."
. " Method says " . $method->package_name . " " . $method->name
. " Class says " . $self->name . " " . $method_name;
$method = $method->clone(
}
else {
$body = $method;
- ('CODE' eq (reftype($body) || ''))
+ ('CODE' eq ref($body))
|| confess "Your code block must be a CODE reference";
$method = $self->method_metaclass->wrap(
$body => (
$self->get_method_map->{$method_name} = $method;
my $full_method_name = ($self->name . '::' . $method_name);
- $self->add_package_symbol("&${method_name}" =>
+ $self->add_package_symbol(
+ { sigil => '&', type => 'CODE', name => $method_name },
Class::MOP::subname($full_method_name => $body)
);
- $self->update_package_cache_flag;
+
+ $self->update_package_cache_flag; # still valid, since we just added the method to the map, and if it was invalid before that then get_method_map updated it
}
{
|| confess "You must define a method name";
my $body = (blessed($method) ? $method->body : $method);
- ('CODE' eq (reftype($body) || ''))
+ ('CODE' eq ref($body))
|| confess "Your code block must be a CODE reference";
- $self->add_package_symbol("&${method_name}" => $body);
- $self->update_package_cache_flag;
+ $self->add_package_symbol(
+ { sigil => '&', type => 'CODE', name => $method_name } => $body
+ );
}
sub has_method {
my $removed_method = delete $self->get_method_map->{$method_name};
- $self->remove_package_symbol("&${method_name}");
-
- $self->update_package_cache_flag;
+ $self->remove_package_symbol(
+ { sigil => '&', type => 'CODE', name => $method_name }
+ );
+
+ $self->update_package_cache_flag; # still valid, since we just removed the method from the map
return $removed_method;
}
# name here so that we can properly detach
# the old attr object, and remove any
# accessors it would have generated
- $self->remove_attribute($attribute->name)
- if $self->has_attribute($attribute->name);
+ if ( $self->has_attribute($attribute->name) ) {
+ $self->remove_attribute($attribute->name);
+ } else {
+ $self->invalidate_meta_instances();
+ }
# then onto installing the new accessors
- $attribute->install_accessors();
$self->get_attribute_map->{$attribute->name} = $attribute;
+
+ # invalidate package flag here
+ my $e = do { local $@; eval { $attribute->install_accessors() }; $@ };
+ if ( $e ) {
+ $self->remove_attribute($attribute->name);
+ die $e;
+ }
+
+ return $attribute;
+}
+
+sub update_meta_instance_dependencies {
+ my $self = shift;
+
+ if ( $self->{meta_instance_dependencies} ) {
+ return $self->add_meta_instance_dependencies;
+ }
+}
+
+sub add_meta_instance_dependencies {
+ my $self = shift;
+
+ $self->remove_meta_instance_depdendencies;
+
+ my @attrs = $self->compute_all_applicable_attributes();
+
+ my %seen;
+ my @classes = grep { not $seen{$_->name}++ } map { $_->associated_class } @attrs;
+
+ foreach my $class ( @classes ) {
+ $class->add_dependent_meta_instance($self);
+ }
+
+ $self->{meta_instance_dependencies} = \@classes;
+}
+
+sub remove_meta_instance_depdendencies {
+ my $self = shift;
+
+ if ( my $classes = delete $self->{meta_instance_dependencies} ) {
+ foreach my $class ( @$classes ) {
+ $class->remove_dependent_meta_instance($self);
+ }
+
+ return $classes;
+ }
+
+ return;
+
+}
+
+sub add_dependent_meta_instance {
+ my ( $self, $metaclass ) = @_;
+ push @{ $self->{dependent_meta_instances} }, $metaclass;
+}
+
+sub remove_dependent_meta_instance {
+ my ( $self, $metaclass ) = @_;
+ my $name = $metaclass->name;
+ @$_ = grep { $_->name ne $name } @$_ for $self->{dependent_meta_instances};
+}
+
+sub invalidate_meta_instances {
+ my $self = shift;
+ $_->invalidate_meta_instance() for $self, @{ $self->{dependent_meta_instances} };
+}
+
+sub invalidate_meta_instance {
+ my $self = shift;
+ undef $self->{_meta_instance};
}
sub has_attribute {
my $removed_attribute = $self->get_attribute_map->{$attribute_name};
return unless defined $removed_attribute;
delete $self->get_attribute_map->{$attribute_name};
+ $self->invalidate_meta_instances();
$removed_attribute->remove_accessors();
$removed_attribute->detach_from_class();
return $removed_attribute;
# the reference stored in $IMMUTABLE_TRANSFORMERS{$class} and ||= should DWIM
{
+
my %IMMUTABLE_TRANSFORMERS;
my %IMMUTABLE_OPTIONS;
+
+ sub get_immutable_options {
+ my $self = shift;
+ return if $self->is_mutable;
+ confess "unable to find immutabilizing options"
+ unless exists $IMMUTABLE_OPTIONS{$self->name};
+ my %options = %{$IMMUTABLE_OPTIONS{$self->name}};
+ delete $options{IMMUTABLE_TRANSFORMER};
+ return \%options;
+ }
+
+ sub get_immutable_transformer {
+ my $self = shift;
+ if( $self->is_mutable ){
+ my $class = blessed $self || $self;
+ return $IMMUTABLE_TRANSFORMERS{$class} ||= $self->create_immutable_transformer;
+ }
+ confess "unable to find transformer for immutable class"
+ unless exists $IMMUTABLE_OPTIONS{$self->name};
+ return $IMMUTABLE_OPTIONS{$self->name}->{IMMUTABLE_TRANSFORMER};
+ }
+
sub make_immutable {
my $self = shift;
my %options = @_;
- my $class = blessed $self || $self;
-
- $IMMUTABLE_TRANSFORMERS{$class} ||= $self->create_immutable_transformer;
- my $transformer = $IMMUTABLE_TRANSFORMERS{$class};
+ my $transformer = $self->get_immutable_transformer;
$transformer->make_metaclass_immutable($self, \%options);
$IMMUTABLE_OPTIONS{$self->name} =
{ %options, IMMUTABLE_TRANSFORMER => $transformer };
print STDERR "# of Metaclass options: ", keys %IMMUTABLE_OPTIONS;
print STDERR "# of Immutable transformers: ", keys %IMMUTABLE_TRANSFORMERS;
}
-
+
1;
}
Clears the package cache flag to announce to the internals that we need
to rebuild the method map.
+=item B<add_meta_instance_dependencies>
+
+Registers this class as dependent on its superclasses.
+
+Only superclasses from which this class inherits attributes will be added.
+
+=item B<remove_meta_instance_depdendencies>
+
+Unregisters this class from its superclasses.
+
+=item B<update_meta_instance_dependencies>
+
+Reregisters if necessary.
+
+=item B<add_dependent_meta_instance> $metaclass
+
+Registers the class as having a meta instance dependent on this class.
+
+=item B<remove_dependent_meta_instance> $metaclass
+
+Remove the class from the list of dependent classes.
+
+=item B<invalidate_meta_instances>
+
+Clears the cached meta instance for this metaclass and all of the registered
+classes with dependent meta instances.
+
+Called by C<add_attribute> and C<remove_attribute> to recalculate the attribute
+slots.
+
+=item B<invalidate_meta_instance>
+
+Used by C<invalidate_meta_instances>.
+
=back
=head2 Object instance construction and cloning
Returns an instance of L<Class::MOP::Instance> to be used in the construction
of a new instance of the class.
+=item B<create_meta_instance>
+
+Called by C<get_meta_instance> if necessary.
+
=item B<new_object (%params)>
This is a convience method for creating a new object of the class, and
This method will reverse tranforamtion upon the class which
made it immutable.
+=item B<get_immutable_transformer>
+
+Return a transformer suitable for making this class immutable or, if this
+class is immutable, the transformer used to make it immutable.
+
+=item B<get_immutable_options>
+
+If the class is immutable, return the options used to make it immutable.
+
=item B<create_immutable_transformer>
Create a transformer suitable for making this class immutable
projects / gitmo/Class-MOP.git / blobdiff